Convert.ToUInt16 メソッド

定義

指定した値を 16 ビット符号なし整数に変換します。

オーバーロード

ToUInt16(String)

指定した数値の文字列形式を等価の 16 ビット符号なし整数に変換します。

ToUInt16(UInt16)

指定した 16 ビット符号なし整数が返されます。実際の変換は行われません。

ToUInt16(UInt32)

指定した 32 ビット符号なし整数の値を等価の 16 ビット符号なし整数に変換します。

ToUInt16(String, Int32)

指定した基数での数値の文字列形式を、等価の 16 ビット符号なし整数に変換します。

ToUInt16(Object, IFormatProvider)

指定したカルチャに固有の書式情報を使用して、指定したオブジェクトの値を 16 ビット符号なし整数に変換します。

ToUInt16(String, IFormatProvider)

指定したカルチャに固有の書式情報を使用して、指定した数値の文字列形式を等価の 16 ビット符号なし整数に変換します。

ToUInt16(Single)

指定した単精度浮動小数点数値を等価の 16 ビット符号なし整数に変換します。

ToUInt16(UInt64)

指定した 64 ビット符号なし整数の値を等価の 16 ビット符号なし整数に変換します。

ToUInt16(SByte)

指定した 8 ビット符号付き整数の値を等価の 16 ビット符号なし整数に変換します。

ToUInt16(Double)

指定した倍精度浮動小数点数値を等価の 16 ビット符号なし整数に変換します。

ToUInt16(Int64)

指定した 64 ビット符号付き整数の値を等価の 16 ビット符号なし整数に変換します。

ToUInt16(Object)

指定したオブジェクトの値を 16 ビット符号なし整数に変換します。

ToUInt16(Byte)

指定した 8 ビット符号なし整数の値を等価の 16 ビット符号なし整数に変換します。

ToUInt16(Char)

指定した Unicode 文字の値を等価の 16 ビット符号なし整数に変換します。

ToUInt16(DateTime)

このメソッドを呼び出すと、必ず InvalidCastException がスローされます。

ToUInt16(Boolean)

指定したブール値を等価の 16 ビット符号なし整数に変換します。

ToUInt16(Int16)

指定した 16 ビット符号付き整数の値を等価の 16 ビット符号なし整数に変換します。

ToUInt16(Int32)

指定した 32 ビット符号付き整数の値を等価の 16 ビット符号なし整数に変換します。

ToUInt16(Decimal)

指定した 10 進数値を等価の 16 ビット符号なし整数に変換します。

ToUInt16(String)

重要

この API は CLS 準拠ではありません。

指定した数値の文字列形式を等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(System::String ^ value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (string value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (string? value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : string -> uint16
Public Shared Function ToUInt16 (value As String) As UShort

パラメーター

value
String

変換する数値を含んだ文字列。

戻り値

UInt16

value の数値と等価の 16 ビット符号なし整数。valuenull の場合は 0 (ゼロ)。

属性

例外

value は、オプションの符号とそれに続く数字 (0 ~ 9) のシーケンスで構成されていません。

valueMinValue 未満の数値か、MaxValue より大きい数値を表します。

次の例では、数値文字列配列内の各要素を 16 ビット符号なし整数に変換しようとしています。

string[] values = { "1603", "1,603", "one", "1.6e03", "1.2e-02",
                    "-1326", "1074122" };
ushort result;

foreach (string value in values)
{
   try {
      result = Convert.ToUInt16(value);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
   }
   catch (FormatException) {
      Console.WriteLine("The {0} value {1} is not in a recognizable format.",
                        value.GetType().Name, value);
   }
   catch (OverflowException) {
      Console.WriteLine("{0} is outside the range of the UInt16 type.", value);
   }
}
// The example displays the following output:
//    Converted the String value '1603' to the UInt16 value 1603.
//    The String value 1,603 is not in a recognizable format.
//    The String value one is not in a recognizable format.
//    The String value 1.6e03 is not in a recognizable format.
//    The String value 1.2e-02 is not in a recognizable format.
//    -1326 is outside the range of the UInt16 type.
//    1074122 is outside the range of the UInt16 type.
let values =
    [| "1603"; "1,603"; "one"; "1.6e03"
       "1.2e-02"; "-1326"; "1074122" |]

for value in values do
    try
        let result = Convert.ToUInt16 value
        printfn $"Converted the {value.GetType().Name} value '{value}' to the {result.GetType().Name} value {result}."
    with
    | :? FormatException ->
        printfn $"The {value.GetType().Name} value {value} is not in a recognizable format."
    | :? OverflowException ->
        printfn $"{value} is outside the range of the UInt16 type." 
// The example displays the following output:
//    Converted the String value '1603' to the UInt16 value 1603.
//    The String value 1,603 is not in a recognizable format.
//    The String value one is not in a recognizable format.
//    The String value 1.6e03 is not in a recognizable format.
//    The String value 1.2e-02 is not in a recognizable format.
//    -1326 is outside the range of the UInt16 type.
//    1074122 is outside the range of the UInt16 type.
Dim values() As String = { "1603", "1,603", "one", "1.6e03", "1.2e-02", _
                           "-1326", "1074122" }
Dim result As UShort

For Each value As String In values
   Try
      result = Convert.ToUInt16(value)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        value.GetType().Name, value, _
                        result.GetType().Name, result)
   Catch e As FormatException
      Console.WriteLine("The {0} value {1} is not in a recognizable format.", _
                        value.GetType().Name, value)
   Catch e As OverflowException
      Console.WriteLine("{0} is outside the range of the UInt16 type.", value)
   End Try   
Next
' The example displays the following output:
'    Converted the String value '1603' to the UInt16 value 1603.
'    The String value 1,603 is not in a recognizable format.
'    The String value one is not in a recognizable format.
'    The String value 1.6e03 is not in a recognizable format.
'    The String value 1.2e-02 is not in a recognizable format.
'    -1326 is outside the range of the UInt16 type.
'    1074122 is outside the range of the UInt16 type.

注釈

メソッドの ToUInt16(String) 使用は、メソッドに渡すこと valueUInt16.Parse(String) 同じです。 value は、現在のカルチャの書式設定規則を使用して解釈されます。

変換が失敗した場合に例外を処理しない場合は、代わりにメソッドを UInt16.TryParse 呼び出すことができます。 変換が Boolean 成功したか失敗したかを示す値を返します。

適用対象

ToUInt16(UInt16)

重要

この API は CLS 準拠ではありません。

指定した 16 ビット符号なし整数が返されます。実際の変換は行われません。

public:
 static System::UInt16 ToUInt16(System::UInt16 value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (ushort value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : uint16 -> uint16
Public Shared Function ToUInt16 (value As UShort) As UShort

パラメーター

value
UInt16

返される 16 ビット符号なし整数。

戻り値

UInt16

value は変更されずに返されます。

属性

適用対象

ToUInt16(UInt32)

重要

この API は CLS 準拠ではありません。

指定した 32 ビット符号なし整数の値を等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(System::UInt32 value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (uint value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : uint32 -> uint16
Public Shared Function ToUInt16 (value As UInteger) As UShort

パラメーター

value
UInt32

変換する 32 ビット符号なし整数。

戻り値

UInt16

value と等価の 16 ビット符号なし整数。

属性

例外

valueMaxValue より大きくなっています。

次の例では、符号なし整数の配列内の各要素を符号なし 16 ビット整数に変換しようとしています。

uint[] numbers = { UInt32.MinValue, 121, 340, UInt32.MaxValue };
ushort result;

foreach (uint number in numbers)
{
   try {
      result = Convert.ToUInt16(number);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt16 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    Converted the UInt32 value '0' to the UInt16 value 0.
//    Converted the UInt32 value '121' to the UInt16 value 121.
//    Converted the UInt32 value '340' to the UInt16 value 340.
//    The UInt32 value 4294967295 is outside the range of the UInt16 type.
let numbers = [| UInt32.MinValue; 121u; 340u; UInt32.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"The {number.GetType().Name} value {number} is outside the range of the UInt16 type."
                        
// The example displays the following output:
//    Converted the UInt32 value '0' to the UInt16 value 0.
//    Converted the UInt32 value '121' to the UInt16 value 121.
//    Converted the UInt32 value '340' to the UInt16 value 340.
//    The UInt32 value 4294967295 is outside the range of the UInt16 type.
Dim numbers() As UInteger = { UInt32.MinValue, 121, 340, UInt32.MaxValue }
Dim result As UShort
For Each number As UInteger In numbers
   Try
      result = Convert.ToUInt16(number)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt16 type.", _
                        number.GetType().Name, number)
   End Try
Next
' The example displays the following output:
'    Converted the UInt32 value '0' to the UInt16 value 0.
'    Converted the UInt32 value '121' to the UInt16 value 121.
'    Converted the UInt32 value '340' to the UInt16 value 340.
'    The UInt32 value 4294967295 is outside the range of the UInt16 type.

適用対象

ToUInt16(String, Int32)

重要

この API は CLS 準拠ではありません。

指定した基数での数値の文字列形式を、等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(System::String ^ value, int fromBase);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (string value, int fromBase);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (string? value, int fromBase);
[<System.CLSCompliant(false)>]
static member ToUInt16 : string * int -> uint16
Public Shared Function ToUInt16 (value As String, fromBase As Integer) As UShort

パラメーター

value
String

変換する数値を含んだ文字列。

fromBase
Int32

value 内の数値の基数。これは 2、8、10、または 16 である必要があります。

戻り値

UInt16

value の数値と等価の 16 ビット符号なし整数。valuenull の場合は 0 (ゼロ)。

属性

例外

fromBase が 2、8、10、16 のどれでもありません。

または

valueは 10 進法でない符号なし数値を表しますが、前に負の符号が付いています。

valueEmptyです。

value に、fromBase で指定された進法では使用できない数字である文字が含まれています。 value 内の最初の文字が正しくない場合は、例外メッセージは、変換する数字がないことを示します。それ以外の場合は、このメッセージは、 value に正しくない末尾文字が含まれていることを示します。

valueは 10 進法でない符号なし数値を表しますが、前に負の符号が付いています。

または

valueMinValue 未満の数値か、MaxValue より大きい数値を表します。

次の例では、数値文字列の配列内の各要素を 16 進数の値として解釈し、それを符号なし 16 ビット整数に変換しようとします。

using System;

public class Example
{
   public static void Main()
   {
      string[] hexStrings = { "8000", "0FFF", "f000", "00A30", "D", "-13",
                              "9AC61", "GAD" };
      foreach (string hexString in hexStrings)
      {
         try {
            ushort number = Convert.ToUInt16(hexString, 16);
            Console.WriteLine("Converted '{0}' to {1:N0}.", hexString, number);
         }
         catch (FormatException) {
            Console.WriteLine("'{0}' is not in the correct format for a hexadecimal number.",
                              hexString);
         }
         catch (OverflowException) {
            Console.WriteLine("'{0}' is outside the range of an Int16.", hexString);
         }
         catch (ArgumentException) {
            Console.WriteLine("'{0}' is invalid in base 16.", hexString);
         }
      }
   }
}
// The example displays the following output:
//    Converted '8000' to 32,768.
//    Converted '0FFF' to 4,095.
//    Converted 'f000' to 61,440.
//    Converted '00A30' to 2,608.
//    Converted 'D' to 13.
//    '-13' is invalid in base 16.
//    '9AC61' is outside the range of an Int16.
//    'GAD' is not in the correct format for a hexadecimal number.
open System

let hexStrings =
    [| "8000"; "0FFF"; "f000"; "00A30"
       "D"; "-13"; "9AC61"; "GAD" |]
for hexString in hexStrings do
    try
        let number = Convert.ToUInt16(hexString, 16)
        printfn $"Converted '{hexString}' to {number:N0}."
    with
    | :? FormatException ->
        printfn $"'{hexString}' is not in the correct format for a hexadecimal number."
    | :? OverflowException ->
        printfn $"'{hexString}' is outside the range of an Int16."
    | :? ArgumentException ->
        printfn $"'{hexString}' is invalid in base 16."
// The example displays the following output:
//    Converted '8000' to 32,768.
//    Converted '0FFF' to 4,095.
//    Converted 'f000' to 61,440.
//    Converted '00A30' to 2,608.
//    Converted 'D' to 13.
//    '-13' is invalid in base 16.
//    '9AC61' is outside the range of an Int16.
//    'GAD' is not in the correct format for a hexadecimal number.
Module Example
   Public Sub Main()
      Dim hexStrings() As String = { "8000", "0FFF", "f000", "00A30", "D", _
                                     "-13", "9AC61", "GAD" }
      For Each hexString As String In hexStrings
         Try
            Dim number As UShort = Convert.ToUInt16(hexString, 16)
            Console.WriteLine("Converted '{0}' to {1:N0}.", hexString, number)
         Catch e As FormatException
            Console.WriteLine("'{0}' is not in the correct format for a hexadecimal number.", _
                              hexString)
         Catch e As OverflowException
            Console.WriteLine("'{0}' is outside the range of an Int16.", hexString)
         Catch e As ArgumentException
            Console.WriteLine("'{0}' is invalid in base 16.", hexString)
         End Try
      Next                                            
   End Sub
End Module
'    ' The example displays the following output:
'    Converted '8000' to 32,768.
'    Converted '0FFF' to 4,095.
'    Converted 'f000' to 61,440.
'    Converted '00A30' to 2,608.
'    Converted 'D' to 13.
'    '-13' is invalid in base 16.
'    '9AC61' is outside the range of an Int16.
'    'GAD' is not in the correct format for a hexadecimal number.

注釈

16 の場合 fromBase は、パラメーターで指定された数値の前に value "0x" または "0X" を付けることができます。

データ型は UInt16 符号なし値のみをサポートするため、 ToUInt16(String, Int32) メソッドでは、符号なしバイナリ表現を使用して表現されているものと見な value されます。 つまり、16 ビットすべてが数値を表すために使用され、符号ビットは存在しません。 その結果、メソッドが例外をスローせずに、データ型の範囲外 UInt16 の符号付き整数値を値に UInt16 変換するコードを記述できます。 次の例では、16 進数の文字列形式に変換 Int16.MinValue し、メソッドを ToUInt16(String, Int32) 呼び出します。 メソッドは例外をスローする代わりに、"0x8000 32768 に変換します" というメッセージを表示します。

// Create a hexadecimal value out of range of the UInt16 type.
string value = Convert.ToString(Int16.MinValue, 16);
// Convert it back to a number.
try
{
   UInt16 number = Convert.ToUInt16(value, 16);
   Console.WriteLine("0x{0} converts to {1}.", value, number);
}
catch (OverflowException)
{
   Console.WriteLine("Unable to convert '0x{0}' to an unsigned short integer.",
                     value);
}
// Create a hexadecimal value out of range of the UInt16 type.
let value = Convert.ToString(Int16.MinValue, 16)
// Convert it back to a number.
try
    let number = Convert.ToUInt16(value, 16)
    printfn $"0x{value} converts to {number}."
with :? OverflowException ->
    printfn $"Unable to convert '0x{value}' to an unsigned short integer."
' Create a hexadecimal value out of range of the UInt16 type.
Dim value As String = Convert.ToString(Short.MinValue, 16)
' Convert it back to a number.
Try
   Dim number As UInt16 = Convert.ToUInt16(value, 16)
   Console.WriteLine("0x{0} converts to {1}.", value, number)
Catch e As OverflowException
   Console.WriteLine("Unable to convert '0x{0}' to an unsigned short integer.", _
                     value)
End Try

二項演算または数値変換を実行する場合、開発者は常に、メソッドまたは演算子が適切な数値表現を使用して特定の値を解釈していることを確認する必要があります。 次の例は、16 進文字列を値に変換するときに 2 つの補数表現を使用する値を解釈するために、メソッドがバイナリ表現を不適切に使用しないようにするための UInt16 1 つの手法を示しています。 この例では、その値を文字列形式に変換するときに、値が符号付き整数または符号なし整数のいずれを表すかを決定します。 この例では、値を値に UInt16 変換するときに、元の値が符号付き整数であるかどうかを確認します。 その場合、上位ビットが設定されている場合 (元の値が負の値であることを示します)、メソッドは例外をスローします。

// Create a negative hexadecimal value out of range of the UInt16 type.
short sourceNumber = Int16.MinValue;
bool isSigned = Math.Sign((short)sourceNumber.GetType().GetField("MinValue").GetValue(null)) == -1;
string value = Convert.ToString(sourceNumber, 16);
UInt16 targetNumber;
try
{
   targetNumber = Convert.ToUInt16(value, 16);
   if (isSigned && ((targetNumber & 0x8000) != 0))
      throw new OverflowException();
   else
      Console.WriteLine("0x{0} converts to {1}.", value, targetNumber);
}
catch (OverflowException)
{
   Console.WriteLine("Unable to convert '0x{0}' to an unsigned short integer.", value);
}
// Displays the following to the console:
//    Unable to convert '0x8000' to an unsigned short integer.
// Create a negative hexadecimal value out of range of the UInt16 type.
let sourceNumber = Int16.MinValue
let isSigned = sign (sourceNumber.GetType().GetField("MinValue").GetValue null :?> int16) = -1
let value = Convert.ToString(sourceNumber, 16)
try
    let targetNumber = Convert.ToUInt16(value, 16)
    if isSigned && targetNumber &&& 0x8000us <> 0us then
        raise (OverflowException())
    else
        printfn $"0x{value} converts to {targetNumber}."
with :? OverflowException ->
    printfn $"Unable to convert '0x{value}' to an unsigned short integer."
// Displays the following to the console:
//    Unable to convert '0x8000' to an unsigned short integer.
' Create a negative hexadecimal value out of range of the UInt16 type.
Dim sourceNumber As Short = Short.MinValue
Dim isSigned As Boolean = Math.Sign(sourceNumber.MinValue) = -1
Dim value As String = Convert.ToString(sourceNumber, 16)
Dim targetNumber As UInt16
Try
   targetNumber = Convert.ToUInt16(value, 16)
   If isSigned And ((targetNumber And &H8000) <> 0) Then
      Throw New OverflowException()
   Else 
      Console.WriteLine("0x{0} converts to {1}.", value, targetNumber)
   End If    
Catch e As OverflowException
   Console.WriteLine("Unable to convert '0x{0}' to an unsigned short integer.", _
                     value)
End Try 
' Displays the following to the console:
'    Unable to convert '0x8000' to an unsigned short integer.

適用対象

ToUInt16(Object, IFormatProvider)

重要

この API は CLS 準拠ではありません。

指定したカルチャに固有の書式情報を使用して、指定したオブジェクトの値を 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(System::Object ^ value, IFormatProvider ^ provider);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (object value, IFormatProvider provider);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (object? value, IFormatProvider? provider);
[<System.CLSCompliant(false)>]
static member ToUInt16 : obj * IFormatProvider -> uint16
Public Shared Function ToUInt16 (value As Object, provider As IFormatProvider) As UShort

パラメーター

value
Object

IConvertible インターフェイスを実装するオブジェクト。

provider
IFormatProvider

カルチャ固有の書式情報を提供するオブジェクト。

戻り値

UInt16

value と等価の 16 ビット符号なし整数。valuenull の場合は 0。

属性

例外

value が適切な形式ではありません。

valueIConvertible インターフェイスを実装していません。

または

この変換はサポートされていません。

valueMinValue 未満の数値か、MaxValue より大きい数値を表します。

次の例では、インターフェイスを HexString 実装 IConvertible し、16 ビット符号付き値と 16 ビット符号なし値の両方の文字列表現を保持するように設計されたクラスを定義します。 クラスには、 Sign その 16 進値の符号を示すプロパティが含まれています。

using System;
using System.Globalization;
using System.Text.RegularExpressions;

public enum SignBit { Negative=-1, Zero=0, Positive=1 };

public struct HexString : IConvertible
{
   private SignBit signBit;
   private string hexString;

   public SignBit Sign
   {
      set { signBit = value; }
      get { return signBit; }
   }

   public string Value
   {
      set {
         if (value.Trim().Length > 4)
            throw new ArgumentException("The string representation of a 160bit integer cannot have more than four characters.");
         else if (! Regex.IsMatch(value, "([0-9,A-F]){1,4}", RegexOptions.IgnoreCase))
            throw new ArgumentException("The hexadecimal representation of a 16-bit integer contains invalid characters.");
         else
            hexString = value;
      }
      get { return hexString; }
   }

   // IConvertible implementations.
   public TypeCode GetTypeCode() {
      return TypeCode.Object;
   }

   public bool ToBoolean(IFormatProvider provider)
   {
      return signBit != SignBit.Zero;
   }

   public byte ToByte(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToInt16(hexString, 16)));
      else
         try {
            return Convert.ToByte(UInt16.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the UInt16 type.", Convert.ToUInt16(hexString, 16)), e);
         }
   }

   public char ToChar(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative) {
         throw new OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToInt16(hexString, 16)));
      }

      UInt16 codePoint = UInt16.Parse(this.hexString, NumberStyles.HexNumber);
      return Convert.ToChar(codePoint);
   }

   public DateTime ToDateTime(IFormatProvider provider)
   {
      throw new InvalidCastException("Hexadecimal to DateTime conversion is not supported.");
   }

   public decimal ToDecimal(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
      {
         short hexValue = Int16.Parse(hexString, NumberStyles.HexNumber);
         return Convert.ToDecimal(hexValue);
      }
      else
      {
         ushort hexValue = UInt16.Parse(hexString, NumberStyles.HexNumber);
         return Convert.ToDecimal(hexValue);
      }
   }

   public double ToDouble(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToDouble(Int16.Parse(hexString, NumberStyles.HexNumber));
      else
         return Convert.ToDouble(UInt16.Parse(hexString, NumberStyles.HexNumber));
   }

   public short ToInt16(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Int16.Parse(hexString, NumberStyles.HexNumber);
      else
         try {
            return Convert.ToInt16(UInt16.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Int16 type.",
                                                      Convert.ToUInt16(hexString, 16)), e);
         }
   }

   public int ToInt32(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToInt32(Int16.Parse(hexString, NumberStyles.HexNumber));
      else
         return Convert.ToInt32(UInt16.Parse(hexString, NumberStyles.HexNumber));
   }

   public long ToInt64(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToInt64(Int16.Parse(hexString, NumberStyles.HexNumber));
      else
         return Int64.Parse(hexString, NumberStyles.HexNumber);
   }

   public sbyte ToSByte(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         try {
            return Convert.ToSByte(Int16.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is outside the range of the SByte type.",
                                                      Int16.Parse(hexString, NumberStyles.HexNumber), e));
         }
      else
         try {
            return Convert.ToSByte(UInt16.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is outside the range of the SByte type.",
                                                   UInt16.Parse(hexString, NumberStyles.HexNumber)), e);
         }
   }

   public float ToSingle(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToSingle(Int16.Parse(hexString, NumberStyles.HexNumber));
      else
         return Convert.ToSingle(UInt16.Parse(hexString, NumberStyles.HexNumber));
   }

   public string ToString(IFormatProvider provider)
   {
      return "0x" + this.hexString;
   }

   public object ToType(Type conversionType, IFormatProvider provider)
   {
      switch (Type.GetTypeCode(conversionType))
      {
         case TypeCode.Boolean:
            return this.ToBoolean(null);
         case TypeCode.Byte:
            return this.ToByte(null);
         case TypeCode.Char:
            return this.ToChar(null);
         case TypeCode.DateTime:
            return this.ToDateTime(null);
         case TypeCode.Decimal:
            return this.ToDecimal(null);
         case TypeCode.Double:
            return this.ToDouble(null);
         case TypeCode.Int16:
            return this.ToInt16(null);
         case TypeCode.Int32:
            return this.ToInt32(null);
         case TypeCode.Int64:
            return this.ToInt64(null);
         case TypeCode.Object:
            if (typeof(HexString).Equals(conversionType))
               return this;
            else
               throw new InvalidCastException(String.Format("Conversion to a {0} is not supported.", conversionType.Name));
         case TypeCode.SByte:
            return this.ToSByte(null);
         case TypeCode.Single:
            return this.ToSingle(null);
         case TypeCode.String:
            return this.ToString(null);
         case TypeCode.UInt16:
            return this.ToUInt16(null);
         case TypeCode.UInt32:
            return this.ToUInt32(null);
         case TypeCode.UInt64:
            return this.ToUInt64(null);
         default:
            throw new InvalidCastException(String.Format("Conversion to {0} is not supported.", conversionType.Name));
      }
   }

   public UInt16 ToUInt16(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is outside the range of the UInt16 type.",
                                                   Int16.Parse(hexString, NumberStyles.HexNumber)));
      else
         return UInt16.Parse(hexString, NumberStyles.HexNumber);
   }

   public UInt32 ToUInt32(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is outside the range of the UInt32 type.",
                                                   Int16.Parse(hexString, NumberStyles.HexNumber)));
      else
         return Convert.ToUInt32(hexString, 16);
   }

   public UInt64 ToUInt64(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is outside the range of the UInt64 type.",
                                                   Int64.Parse(hexString, NumberStyles.HexNumber)));
      else
         return Convert.ToUInt64(hexString, 16);
   }
}
open System
open System.Globalization
open System.Text.RegularExpressions

type SignBit =
    | Negative = -1
    | Zero = 0
    | Positive = 1

[<Struct>]
type HexString =
    val mutable private hexString: string

    val mutable Sign: SignBit

    member this.Value
        with get () = this.hexString
        and set (value: string) =
            if value.Trim().Length > 4 then
                invalidArg "value" "The string representation of a 16 bit integer cannot have more than four characters."
            elif Regex.IsMatch(value, "([0-9,A-F]){1,4}", RegexOptions.IgnoreCase) |> not then
                invalidArg "value" "The hexadecimal representation of a 16-bit integer contains invalid characters."
            else
                this.hexString <- value

    interface IConvertible with
        // IConvertible implementations.
        member _.GetTypeCode() =
            TypeCode.Object

        member this.ToBoolean(provider: IFormatProvider) =
            this.Sign <> SignBit.Zero

        member this.ToByte(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Convert.ToInt16(this.hexString, 16)} is out of range of the Byte type.")
            else
                try
                    Convert.ToByte(UInt16.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Convert.ToUInt16(this.hexString, 16)} is out of range of the UInt16 type.", e) )

        member this.ToChar(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Convert.ToInt16(this.hexString, 16)} is out of range of the Char type.")

            let codePoint = UInt16.Parse(this.hexString, NumberStyles.HexNumber)
            Convert.ToChar codePoint

        member _.ToDateTime(provider: IFormatProvider) =
            raise (InvalidCastException "Hexadecimal to DateTime conversion is not supported.")

        member this.ToDecimal(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                let hexValue = Int16.Parse(this.hexString, NumberStyles.HexNumber)
                Convert.ToDecimal hexValue
            else
                let hexValue = UInt16.Parse(this.hexString, NumberStyles.HexNumber)
                Convert.ToDecimal hexValue

        member this.ToDouble(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                Convert.ToDouble(Int16.Parse(this.hexString, NumberStyles.HexNumber))
            else
                Convert.ToDouble(UInt16.Parse(this.hexString, NumberStyles.HexNumber))

        member this.ToInt16(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                Int16.Parse(this.hexString, NumberStyles.HexNumber)
            else
                try
                    Convert.ToInt16(UInt16.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Convert.ToUInt16(this.hexString, 16)} is out of range of the Int16 type.", e) )

        member this.ToInt32(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                Convert.ToInt32(Int16.Parse(this.hexString, NumberStyles.HexNumber))
            else
                Convert.ToInt32(UInt16.Parse(this.hexString, NumberStyles.HexNumber))

        member this.ToInt64(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                Convert.ToInt64(Int16.Parse(this.hexString, NumberStyles.HexNumber))
            else
                Int64.Parse(this.hexString, NumberStyles.HexNumber)

        member this.ToSByte(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                try
                    Convert.ToSByte(Int16.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Int16.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the SByte type.", e))
            else
                try
                    Convert.ToSByte(UInt16.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{UInt16.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the SByte type.", e) )

        member this.ToSingle(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                Convert.ToSingle(Int16.Parse(this.hexString, NumberStyles.HexNumber))
            else
                Convert.ToSingle(UInt16.Parse(this.hexString, NumberStyles.HexNumber))

        member this.ToString(provider: IFormatProvider) =
            "0x" + this.hexString

        member this.ToType(conversionType: Type, provider: IFormatProvider) =
            let this = this :> IConvertible
            match Type.GetTypeCode conversionType with
            | TypeCode.Boolean ->
                this.ToBoolean null
            | TypeCode.Byte ->
                this.ToByte null
            | TypeCode.Char ->
                this.ToChar null
            | TypeCode.DateTime ->
                this.ToDateTime null
            | TypeCode.Decimal->
                this.ToDecimal null
            | TypeCode.Double ->
                this.ToDouble null
            | TypeCode.Int16 ->
                this.ToInt16 null
            | TypeCode.Int32 ->
                this.ToInt32 null
            | TypeCode.Int64 ->
                this.ToInt64 null
            | TypeCode.Object ->
                if typeof<HexString>.Equals conversionType then
                    this
                else
                    raise (InvalidCastException $"Conversion to a {conversionType.Name} is not supported.")
            | TypeCode.SByte ->
                this.ToSByte null
            | TypeCode.Single ->
                this.ToSingle null
            | TypeCode.String ->
                this.ToString null
            | TypeCode.UInt16 ->
                this.ToUInt16 null
            | TypeCode.UInt32 ->
                this.ToUInt32 null
            | TypeCode.UInt64 ->
                this.ToUInt64 null
            | _ ->
                raise (InvalidCastException $"Conversion to {conversionType.Name} is not supported.")

        member this.ToUInt16(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Int16.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt16 type.")
            else
                UInt16.Parse(this.hexString, NumberStyles.HexNumber)

        member this.ToUInt32(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Int16.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt32 type.")
            else
                Convert.ToUInt32(this.hexString, 16)

        member this.ToUInt64(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Int64.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt64 type.")
            else
                Convert.ToUInt64(this.hexString, 16)
Imports System.Globalization
Imports System.Text.RegularExpressions

Public Enum SignBit As Integer
   Positive = 1
   Zero = 0
   Negative = -1
End Enum

Public Structure HexString : Implements IConvertible
   Private signBit As SignBit
   Private hexString As String
   
   Public Property Sign As SignBit
      Set
         signBit = value
      End Set
      Get
         Return signBit
      End Get
   End Property
   
   Public Property Value As String
      Set
         If value.Trim().Length > 4 Then
            Throw New ArgumentException("The string representation of a 16-bit integer cannot have more than four characters.")
         Else If Not Regex.IsMatch(value, "([0-9,A-F]){1,4}", RegexOptions.IgnoreCase) Then
            Throw New ArgumentException("The hexadecimal representation of a 16-bit integer contains invalid characters.")             
         Else
            hexString = value
         End If   
      End Set
      Get
         Return hexString
      End Get
   End Property
   
   ' IConvertible implementations.
   Public Function GetTypeCode() As TypeCode _
                   Implements IConvertible.GetTypeCode
      Return TypeCode.Object
   End Function
   
   Public Function ToBoolean(provider As IFormatProvider) As Boolean _
                   Implements IConvertible.ToBoolean
      Return signBit <> SignBit.Zero             
   End Function 
   
   Public Function ToByte(provider As IFormatProvider) As Byte _
                   Implements IConvertible.ToByte
      If signBit = signBit.Negative Then
         Throw New OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToInt16(hexString, 16))) 
      Else
         Try
            Return Convert.ToByte(Int16.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the UInt16 type.", Convert.ToUInt16(hexString, 16)), e)
         End Try   
      End If       
   End Function
   
   Public Function ToChar(provider As IFormatProvider) As Char _
                   Implements IConvertible.ToChar
      If signBit = signBit.Negative Then 
         Throw New OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToInt16(hexString, 16)))
      End If
      
      Dim codePoint As UInt16 = UInt16.Parse(Me.hexString, NumberStyles.HexNumber)
      Return Convert.ToChar(codePoint)
   End Function 
   
   Public Function ToDateTime(provider As IFormatProvider) As Date _
                   Implements IConvertible.ToDateTime
      Throw New InvalidCastException("Hexadecimal to DateTime conversion is not supported.")
   End Function
   
   Public Function ToDecimal(provider As IFormatProvider) As Decimal _
                   Implements IConvertible.ToDecimal
      If signBit = signBit.Negative Then
         Dim hexValue As Short = Int16.Parse(hexString, NumberStyles.HexNumber)
         Return Convert.ToDecimal(hexValue)
      Else
         Dim hexValue As UShort = UInt16.Parse(hexString, NumberStyles.HexNumber)
         Return Convert.ToDecimal(hexValue)
      End If
   End Function
   
   Public Function ToDouble(provider As IFormatProvider) As Double _
                   Implements IConvertible.ToDouble
      If signBit = signBit.Negative Then
         Return Convert.ToDouble(Int16.Parse(hexString, NumberStyles.HexNumber))
      Else
         Return Convert.ToDouble(UInt16.Parse(hexString, NumberStyles.HexNumber))
      End If   
   End Function   
   
   Public Function ToInt16(provider As IFormatProvider) As Int16 _
                   Implements IConvertible.ToInt16
      If signBit = SignBit.Negative Then
         Return Int16.Parse(hexString, NumberStyles.HexNumber)
      Else
         Try
            Return Convert.ToInt16(UInt16.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToUInt16(hexString, 16)), e)
         End Try
      End If   
   End Function
   
   Public Function ToInt32(provider As IFormatProvider) As Int32 _
                   Implements IConvertible.ToInt32
      If signBit = SignBit.Negative Then
         Return Convert.ToInt32(Int16.Parse(hexString, NumberStyles.HexNumber))
      Else
         Return Convert.ToInt32(UInt16.Parse(hexString, NumberStyles.HexNumber))
      End If   
   End Function
   
   Public Function ToInt64(provider As IFormatProvider) As Int64 _
                   Implements IConvertible.ToInt64
      If signBit = signBit.Negative Then
         Return Convert.ToInt64(Int16.Parse(hexString, NumberStyles.HexNumber))
      Else
         Return Int64.Parse(hexString, NumberStyles.HexNumber)
      End If   
   End Function
   
   Public Function ToSByte(provider As IFormatProvider) As SByte _
                   Implements IConvertible.ToSByte
      If signBit = signBit.Negative Then
         Try
            Return Convert.ToSByte(Int16.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is outside the range of the SByte type.", _
                                                      Int16.Parse(hexString, NumberStyles.HexNumber), e))
         End Try
      Else
         Try
            Return Convert.ToSByte(UInt16.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is outside the range of the SByte type.", _
                                                    UInt16.Parse(hexString, NumberStyles.HexNumber)), e)
         End Try   
      End If
   End Function

   Public Function ToSingle(provider As IFormatProvider) As Single _
                   Implements IConvertible.ToSingle
      If signBit = signBit.Negative Then
         Return Convert.ToSingle(Int16.Parse(hexString, NumberStyles.HexNumber))
      Else
         Return Convert.ToSingle(UInt16.Parse(hexString, NumberStyles.HexNumber))
      End If   
   End Function

   Public Overloads Function ToString(provider As IFormatProvider) As String _
                   Implements IConvertible.ToString
      Return "0x" & Me.hexString
   End Function
   
   Public Function ToType(conversionType As Type, provider As IFormatProvider) As Object _
                   Implements IConvertible.ToType
      Select Case Type.GetTypeCode(conversionType)
         Case TypeCode.Boolean 
            Return Me.ToBoolean(Nothing)
         Case TypeCode.Byte
            Return Me.ToByte(Nothing)
         Case TypeCode.Char
            Return Me.ToChar(Nothing)
         Case TypeCode.DateTime
            Return Me.ToDateTime(Nothing)
         Case TypeCode.Decimal
            Return Me.ToDecimal(Nothing)
         Case TypeCode.Double
            Return Me.ToDouble(Nothing)
         Case TypeCode.Int16
            Return Me.ToInt16(Nothing)
         Case TypeCode.Int32
            Return Me.ToInt32(Nothing)
         Case TypeCode.Int64
            Return Me.ToInt64(Nothing)
         Case TypeCode.Object
            If GetType(HexString).Equals(conversionType) Then
               Return Me
            Else
               Throw New InvalidCastException(String.Format("Conversion to a {0} is not supported.", conversionType.Name))
            End If 
         Case TypeCode.SByte
            Return Me.ToSByte(Nothing)
         Case TypeCode.Single
            Return Me.ToSingle(Nothing)
         Case TypeCode.String
            Return Me.ToString(Nothing)
         Case TypeCode.UInt16
            Return Me.ToUInt16(Nothing)
         Case TypeCode.UInt32
            Return Me.ToUInt32(Nothing)
         Case TypeCode.UInt64
            Return Me.ToUInt64(Nothing)   
         Case Else
            Throw New InvalidCastException(String.Format("Conversion to {0} is not supported.", conversionType.Name))   
      End Select
   End Function
   
   Public Function ToUInt16(provider As IFormatProvider) As UInt16 _
                   Implements IConvertible.ToUInt16
      If signBit = signBit.Negative Then
         Throw New OverflowException(String.Format("{0} is outside the range of the UInt16 type.", _
                                                   Int16.Parse(hexString, NumberStyles.HexNumber)))
      Else
         Return Convert.ToUInt16(hexString, 16)
      End If   
   End Function

   Public Function ToUInt32(provider As IFormatProvider) As UInt32 _
                   Implements IConvertible.ToUInt32
      If signBit = signBit.Negative Then
         Throw New OverflowException(String.Format("{0} is outside the range of the UInt32 type.", _
                                                   Int16.Parse(hexString, NumberStyles.HexNumber)))
      Else
         Return Convert.ToUInt32(hexString, 16)
      End If   
   End Function
   
   Public Function ToUInt64(provider As IFormatProvider) As UInt64 _
                   Implements IConvertible.ToUInt64
      If signBit = signBit.Negative Then
         Throw New OverflowException(String.Format("{0} is outside the range of the UInt64 type.", _
                                                   Int16.Parse(hexString, NumberStyles.HexNumber)))
      Else
         Return Convert.ToUInt64(hexString, 16)
      End If   
   End Function
   
End Structure

次の例では、オブジェクトをパラメーターとして渡HexStringすメソッドをToUInt16(Object, IFormatProvider)呼び出すと、クラスの実装がIConvertible.ToUInt16呼び出されますHexString

public class Example
{
   public static void Main()
   {
      ushort positiveValue = 32000;
      short negativeValue = -1;

      HexString positiveString = new HexString();
      positiveString.Sign = (SignBit) Math.Sign(positiveValue);
      positiveString.Value = positiveValue.ToString("X2");

      HexString negativeString = new HexString();
      negativeString.Sign = (SignBit) Math.Sign(negativeValue);
      negativeString.Value = negativeValue.ToString("X2");

      try {
         Console.WriteLine("0x{0} converts to {1}.", positiveString.Value, Convert.ToUInt16(positiveString));
      }
      catch (OverflowException) {
         Console.WriteLine("{0} is outside the range of the UInt16 type.",
                           Int16.Parse(negativeString.Value, NumberStyles.HexNumber));
      }

      try {
         Console.WriteLine("0x{0} converts to {1}.", negativeString.Value, Convert.ToUInt16(negativeString));
      }
      catch (OverflowException) {
         Console.WriteLine("{0} is outside the range of the UInt16 type.",
                           Int16.Parse(negativeString.Value, NumberStyles.HexNumber));
      }
   }
}
// The example displays the following output:
//       0x7D00 converts to 32000.
//       -1 is outside the range of the UInt16 type.
let positiveValue = 32000us
let negativeValue = -1s

let mutable positiveString = HexString()
positiveString.Sign <- Math.Sign positiveValue |> enum
positiveString.Value <- positiveValue.ToString "X2"

let mutable negativeString = HexString()
negativeString.Sign <- sign negativeValue |> enum
negativeString.Value <- negativeValue.ToString "X2"

try
    printfn $"0x{positiveString.Value} converts to {Convert.ToUInt16 positiveString}."
with :? OverflowException ->
    printfn $"{Int16.Parse(negativeString.Value, NumberStyles.HexNumber)} is outside the range of the UInt16 type."

try
    printfn $"0x{negativeString.Value} converts to {Convert.ToUInt16 negativeString}."
with :? OverflowException ->
    printfn $"{Int16.Parse(negativeString.Value, NumberStyles.HexNumber)} is outside the range of the UInt16 type."
// The example displays the following output:
//       0x7D00 converts to 32000.
//       -1 is outside the range of the UInt16 type.
Module Example
   Public Sub Main()
      Dim positiveValue As UInt16 = 32000
      Dim negativeValue As Int16 = -1
      
      
      Dim positiveString As New HexString()
      positiveString.Sign = CType(Math.Sign(positiveValue), SignBit)
      positiveString.Value = positiveValue.ToString("X4")
      
      Dim negativeString As New HexString()
      negativeString.Sign = CType(Math.Sign(negativeValue), SignBit)
      negativeString.Value = negativeValue.ToString("X4")
      
      Try
         Console.WriteLine("0x{0} converts to {1}.", positiveString.Value, Convert.ToUInt16(positiveString))
      Catch e As OverflowException
         Console.WriteLine("{0} is outside the range of the UInt16 type.", _
                           Int16.Parse(positiveString.Value, NumberStyles.HexNumber))
      End Try

      Try
         Console.WriteLine("0x{0} converts to {1}.", negativeString.Value, Convert.ToUInt16(negativeString))
      Catch e As OverflowException
         Console.WriteLine("{0} is outside the range of the UInt16 type.", _
                           Int16.Parse(negativeString.Value, NumberStyles.HexNumber))
      End Try   
   End Sub
End Module
' The example dosplays the following output:
'       0x7D00 converts to 32000.
'       -1 is outside the range of the UInt16 type.

注釈

戻り値は、基になる型valueのメソッドをIConvertible.ToUInt16呼び出した結果です。

provider を使用すると、ユーザーはコンテンツに関するカルチャ固有の value変換情報を指定できます。 たとえば、数値を表す a String の場合valueは、providerその数値を表すために使用される表記に関するカルチャ固有の情報を提供できます。

基本型は無視 providerされます。ただし、インターフェイスを実装するユーザー定義型の場合 value は、パラメーターを IConvertible 使用できます。

適用対象

ToUInt16(String, IFormatProvider)

重要

この API は CLS 準拠ではありません。

指定したカルチャに固有の書式情報を使用して、指定した数値の文字列形式を等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(System::String ^ value, IFormatProvider ^ provider);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (string value, IFormatProvider provider);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (string? value, IFormatProvider? provider);
[<System.CLSCompliant(false)>]
static member ToUInt16 : string * IFormatProvider -> uint16
Public Shared Function ToUInt16 (value As String, provider As IFormatProvider) As UShort

パラメーター

value
String

変換する数値を含んだ文字列。

provider
IFormatProvider

カルチャ固有の書式情報を提供するオブジェクト。

戻り値

UInt16

value の数値と等価の 16 ビット符号なし整数。valuenull の場合は 0 (ゼロ)。

属性

例外

value は、オプションの符号とそれに続く数字 (0 ~ 9) のシーケンスで構成されていません。

valueMinValue 未満の数値か、MaxValue より大きい数値を表します。

次の例では、文字列 "pos" を正の符号として認識し、文字列 "neg" を負の符号として認識するカスタム NumberFormatInfo オブジェクトを定義します。 次に、このプロバイダーとインバリアント カルチャのプロバイダーの両方を使用して、数値文字列配列の各要素を NumberFormatInfo 整数に変換しようとします。

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      // Create a NumberFormatInfo object and set several of its
      // properties that apply to numbers.
      NumberFormatInfo provider = new NumberFormatInfo();
      provider.PositiveSign = "pos ";
      provider.NegativeSign = "neg ";

      // Define an array of strings to convert to UInt16 values.
      string[] values= { "34567", "+34567", "pos 34567", "34567.",
                         "34567.", "65535", "65535", "65535" };

      foreach (string value in values)
      {
         Console.Write("{0,-12:}  -->  ", value);
         try {
            Console.WriteLine("{0,17}", Convert.ToUInt16(value, provider));
         }
         catch (FormatException e) {
            Console.WriteLine("{0,17}", e.GetType().Name);
         }
      }
   }
}
// The example displays the following output:
//       34567         -->              34567
//       +34567        -->    FormatException
//       pos 34567     -->              34567
//       34567.        -->    FormatException
//       34567.        -->    FormatException
//       65535         -->              65535
//       65535         -->              65535
//       65535         -->              65535
open System
open System.Globalization

// Create a NumberFormatInfo object and set several of its
// properties that apply to numbers.
let provider = NumberFormatInfo()
provider.PositiveSign <- "pos "
provider.NegativeSign <- "neg "

// Define an array of strings to convert to UInt16 values.
let values =
    [| "34567"; "+34567"; "pos 34567"; "34567."
       "34567."; "65535"; "65535"; "65535" |]

for value in values do
    printf $"{value,-12}  -->  "
    try
        printfn $"{Convert.ToUInt16(value, provider),17}"
    with :? FormatException as e ->
        printfn $"{e.GetType().Name,17}"
// The example displays the following output:
//       34567         -->              34567
//       +34567        -->    FormatException
//       pos 34567     -->              34567
//       34567.        -->    FormatException
//       34567.        -->    FormatException
//       65535         -->              65535
//       65535         -->              65535
//       65535         -->              65535
Imports System.Globalization

Module Example
   Public Sub Main()
      ' Create a NumberFormatInfo object and set several of its
      ' properties that apply to numbers.
      Dim provider As New NumberFormatInfo()
      provider.PositiveSign = "pos "
      provider.NegativeSign = "neg "

      ' Define an array of strings to convert to UInt16 values.
      Dim values() As String = { "34567", "+34567", "pos 34567", _
                                 "34567.", "34567.", "65535", _
                                 "65535", "65535" }         

      For Each value As String In values
         Console.Write("{0,-12:}  -->  ", value)
         Try
            Console.WriteLine("{0,17}", Convert.ToUInt16(value, provider))
         Catch e As FormatException       
            Console.WriteLine("{0,17}", e.GetType().Name)
         End Try     
      Next
    End Sub 
End Module 
' The example displays the following output:
'       34567         -->              34567
'       +34567        -->    FormatException
'       pos 34567     -->              34567
'       34567.        -->    FormatException
'       34567.        -->    FormatException
'       65535         -->              65535
'       65535         -->              65535
'       65535         -->              65535

注釈

戻り値は、呼び出し UInt16.Parse の結果です value

provider は、オブジェクトを IFormatProvider 取得するインスタンスです NumberFormatInfo 。 オブジェクトは NumberFormatInfo 、次の形式に関するカルチャ固有の value情報を提供します。 ある場合 providernull、現在の NumberFormatInfo カルチャに対して使用されます。

変換が失敗した場合に例外を処理しない場合は、代わりにメソッドを UInt16.TryParse 呼び出すことができます。 変換が Boolean 成功したか失敗したかを示す値を返します。

適用対象

ToUInt16(Single)

重要

この API は CLS 準拠ではありません。

指定した単精度浮動小数点数値を等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(float value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (float value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : single -> uint16
Public Shared Function ToUInt16 (value As Single) As UShort

パラメーター

value
Single

変換する単精度浮動小数点数。

戻り値

UInt16

近似値の 16 ビット符号なし整数に丸められた valuevalue が 2 つの整数のちょうど中間にある場合は、偶数が返されます。つまり、4.5 は 4 に変換され、5.5 は 6 に変換されます。

属性

例外

value が 0 未満であるか、MaxValue を超えています。

次の例では、値の配列内の String 各要素を符号なし 16 ビット整数に変換します。

float[] numbers = { Single.MinValue, -1.38e10f, -1023.299f, -12.98f,
                   0f, 9.113e-16f, 103.919f, 17834.191f, Single.MaxValue };
ushort result;

foreach (float number in numbers)
{
   try {
      result = Convert.ToUInt16(number);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("{0} is outside the range of the UInt16 type.", number);
   }
}
// The example displays the following output:
//    -3.402823E+38 is outside the range of the UInt16 type.
//    -1.38E+10 is outside the range of the UInt16 type.
//    -1023.299 is outside the range of the UInt16 type.
//    -12.98 is outside the range of the UInt16 type.
//    Converted the Single value '0' to the UInt16 value 0.
//    Converted the Single value '9.113E-16' to the UInt16 value 0.
//    Converted the Single value '103.919' to the UInt16 value 104.
//    Converted the Single value '17834.19' to the UInt16 value 17834.
//    3.402823E+38 is outside the range of the UInt16 type.
let numbers = 
    [| Single.MinValue; -1.38e10f; -1023.299f; -12.98f
       0f; 9.113e-16f; 103.919f; 17834.191f; Single.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"{number} is outside the range of the UInt16 type."
// The example displays the following output:
//    -3.402823E+38 is outside the range of the UInt16 type.
//    -1.38E+10 is outside the range of the UInt16 type.
//    -1023.299 is outside the range of the UInt16 type.
//    -12.98 is outside the range of the UInt16 type.
//    Converted the Single value '0' to the UInt16 value 0.
//    Converted the Single value '9.113E-16' to the UInt16 value 0.
//    Converted the Single value '103.919' to the UInt16 value 104.
//    Converted the Single value '17834.19' to the UInt16 value 17834.
//    3.402823E+38 is outside the range of the UInt16 type.
Dim values() As Single = { Single.MinValue, -1.38e10, -1023.299, -12.98, _
                           0, 9.113e-16, 103.919, 17834.191, Single.MaxValue }
Dim result As UShort

For Each value As Single In values
   Try
      result = Convert.ToUInt16(value)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        value.GetType().Name, value, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("{0} is outside the range of the UInt16 type.", value)
   End Try   
Next                                 
' The example displays the following output:
'    -3.402823E+38 is outside the range of the UInt16 type.
'    -1.38E+10 is outside the range of the UInt16 type.
'    -1023.299 is outside the range of the UInt16 type.
'    -12.98 is outside the range of the UInt16 type.
'    Converted the Single value '0' to the UInt16 value 0.
'    Converted the Single value '9.113E-16' to the UInt16 value 0.
'    Converted the Single value '103.919' to the UInt16 value 104.
'    Converted the Single value '17834.19' to the UInt16 value 17834.
'    3.402823E+38 is outside the range of the UInt16 type.

こちらもご覧ください

適用対象

ToUInt16(UInt64)

重要

この API は CLS 準拠ではありません。

指定した 64 ビット符号なし整数の値を等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(System::UInt64 value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (ulong value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : uint64 -> uint16
Public Shared Function ToUInt16 (value As ULong) As UShort

パラメーター

value
UInt64

変換する 64 ビット符号なし整数。

戻り値

UInt16

value と等価の 16 ビット符号なし整数。

属性

例外

valueMaxValue より大きくなっています。

次の例では、符号なし長整数の配列内の各要素を符号なし 16 ビット整数に変換しようとしています。

ulong[] numbers = { UInt64.MinValue, 121, 340, UInt64.MaxValue };
ushort result;

foreach (ulong number in numbers)
{
   try {
      result = Convert.ToUInt16(number);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt16 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    Converted the UInt64 value '0' to the UInt16 value 0.
//    Converted the UInt64 value '121' to the UInt16 value 121.
//    Converted the UInt64 value '340' to the UInt16 value 340.
//    The UInt64 value 18446744073709551615 is outside the range of the UInt16 type.
let numbers = [| UInt64.MinValue; 121uL; 340uL; UInt64.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"The {number.GetType().Name} value {number} is outside the range of the UInt16 type."
// The example displays the following output:
//    Converted the UInt64 value '0' to the UInt16 value 0.
//    Converted the UInt64 value '121' to the UInt16 value 121.
//    Converted the UInt64 value '340' to the UInt16 value 340.
//    The UInt64 value 18446744073709551615 is outside the range of the UInt16 type.
Dim numbers() As ULong = { UInt64.MinValue, 121, 340, UInt64.MaxValue }
Dim result As UShort
For Each number As ULong In numbers
   Try
      result = Convert.ToUInt16(number)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt16 type.", _
                        number.GetType().Name, number)
   End Try
Next
' The example displays the following output:
'    Converted the UInt64 value '0' to the UInt16 value 0.
'    Converted the UInt64 value '121' to the UInt16 value 121.
'    Converted the UInt64 value '340' to the UInt16 value 340.
'    The UInt64 value 18446744073709551615 is outside the range of the UInt16 type.

適用対象

ToUInt16(SByte)

重要

この API は CLS 準拠ではありません。

指定した 8 ビット符号付き整数の値を等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(System::SByte value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (sbyte value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : sbyte -> uint16
Public Shared Function ToUInt16 (value As SByte) As UShort

パラメーター

value
SByte

変換する 8 ビット符号付き整数。

戻り値

UInt16

value と等価の 16 ビット符号なし整数。

属性

例外

value が 0 未満です。

次の例では、符号付きバイト配列内の各要素を符号なし 16 ビット整数に変換します。

sbyte[] numbers = { SByte.MinValue, -1, 0, 10, SByte.MaxValue };
ushort result;

foreach (sbyte number in numbers)
{
   try {
      result = Convert.ToUInt16(number);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("{0} is outside the range of the UInt16 type.", number);
   }
}
// The example displays the following output:
//    -128 is outside the range of the UInt16 type.
//    -1 is outside the range of the UInt16 type.
//    Converted the SByte value '0' to the UInt16 value 0.
//    Converted the SByte value '10' to the UInt16 value 10.
//    Converted the SByte value '127' to the UInt16 value 127.
let numbers = [| SByte.MinValue; -1y; 0y; 10y; SByte.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"{number} is outside the range of the UInt16 type."
// The example displays the following output:
//    -128 is outside the range of the UInt16 type.
//    -1 is outside the range of the UInt16 type.
//    Converted the SByte value '0' to the UInt16 value 0.
//    Converted the SByte value '10' to the UInt16 value 10.
//    Converted the SByte value '127' to the UInt16 value 127.
Dim numbers() As SByte = { SByte.MinValue, -1, 0, 10, SByte.MaxValue }
Dim result As UShort

For Each number As SByte In numbers
   Try
      result = Convert.ToUInt16(number)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("{0} is outside the range of the UInt16 type.", number)
   End Try
Next
' The example displays the following output:
'    -128 is outside the range of the UInt16 type.
'    -1 is outside the range of the UInt16 type.
'    Converted the SByte value '0' to the UInt16 value 0.
'    Converted the SByte value '10' to the UInt16 value 10.
'    Converted the SByte value '127' to the UInt16 value 127.

適用対象

ToUInt16(Double)

重要

この API は CLS 準拠ではありません。

指定した倍精度浮動小数点数値を等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(double value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (double value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : double -> uint16
Public Shared Function ToUInt16 (value As Double) As UShort

パラメーター

value
Double

変換する倍精度浮動小数点数。

戻り値

UInt16

近似値の 16 ビット符号なし整数に丸められた valuevalue が 2 つの整数のちょうど中間にある場合は、偶数が返されます。つまり、4.5 は 4 に変換され、5.5 は 6 に変換されます。

属性

例外

value が 0 未満であるか、MaxValue を超えています。

次の例では、値の配列内の Double 各要素を符号なし 16 ビット整数に変換します。

double[] numbers = { Double.MinValue, -1.38e10, -1023.299, -12.98,
                    0, 9.113e-16, 103.919, 17834.191, Double.MaxValue };
ushort result;

foreach (double number in numbers)
{
   try {
      result = Convert.ToUInt16(number);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException)
   {
      Console.WriteLine("{0} is outside the range of the UInt16 type.", number);
   }
}
// The example displays the following output:
//    -1.79769313486232E+308 is outside the range of the UInt16 type.
//    -13800000000 is outside the range of the UInt16 type.
//    -1023.299 is outside the range of the UInt16 type.
//    -12.98 is outside the range of the UInt16 type.
//    Converted the Double value '0' to the UInt16 value 0.
//    Converted the Double value '9.113E-16' to the UInt16 value 0.
//    Converted the Double value '103.919' to the UInt16 value 104.
//    Converted the Double value '17834.191' to the UInt16 value 17834.
//    1.79769313486232E+308 is outside the range of the UInt16 type.
let numbers = 
    [| Double.MinValue; -1.38e10; -1023.299; -12.98
       0; 9.113e-16; 103.919; 17834.191; Double.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"{number} is outside the range of the UInt16 type."
// The example displays the following output:
//    -1.79769313486232E+308 is outside the range of the UInt16 type.
//    -13800000000 is outside the range of the UInt16 type.
//    -1023.299 is outside the range of the UInt16 type.
//    -12.98 is outside the range of the UInt16 type.
//    Converted the Double value '0' to the UInt16 value 0.
//    Converted the Double value '9.113E-16' to the UInt16 value 0.
//    Converted the Double value '103.919' to the UInt16 value 104.
//    Converted the Double value '17834.191' to the UInt16 value 17834.
//    1.79769313486232E+308 is outside the range of the UInt16 type.
Dim values() As Double = { Double.MinValue, -1.38e10, -1023.299, -12.98, _
                           0, 9.113e-16, 103.919, 17834.191, Double.MaxValue }
Dim result As UShort

For Each value As Double In values
   Try
      result = Convert.ToUInt16(value)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        value.GetType().Name, value, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("{0} is outside the range of the UInt16 type.", value)
   End Try   
Next                                 
' The example displays the following output:
'    -1.79769313486232E+308 is outside the range of the UInt16 type.
'    -13800000000 is outside the range of the UInt16 type.
'    -1023.299 is outside the range of the UInt16 type.
'    -12.98 is outside the range of the UInt16 type.
'    Converted the Double value '0' to the UInt16 value 0.
'    Converted the Double value '9.113E-16' to the UInt16 value 0.
'    Converted the Double value '103.919' to the UInt16 value 104.
'    Converted the Double value '17834.191' to the UInt16 value 17834.
'    1.79769313486232E+308 is outside the range of the UInt16 type.

こちらもご覧ください

適用対象

ToUInt16(Int64)

重要

この API は CLS 準拠ではありません。

指定した 64 ビット符号付き整数の値を等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(long value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (long value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : int64 -> uint16
Public Shared Function ToUInt16 (value As Long) As UShort

パラメーター

value
Int64

変換する 64 ビット符号付き整数。

戻り値

UInt16

value と等価の 16 ビット符号なし整数。

属性

例外

value が 0 未満であるか、MaxValue を超えています。

次の例では、長整数配列内の各要素を符号なし 16 ビット整数に変換します。

long[] numbers = { Int64.MinValue, -1, 0, 121, 340, Int64.MaxValue };
ushort result;

foreach (long number in numbers)
{
   try {
      result = Convert.ToUInt16(number);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt16 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Int64 value -9223372036854775808 is outside the range of the UInt16 type.
//    The Int64 value -1 is outside the range of the UInt16 type.
//    Converted the Int64 value '0' to the UInt16 value 0.
//    Converted the Int64 value '121' to the UInt16 value 121.
//    Converted the Int64 value '340' to the UInt16 value 340.
//    The Int64 value 9223372036854775807 is outside the range of the UInt16 type.
let numbers = [| Int64.MinValue; -1; 0; 121; 340; Int64.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn "The {number.GetType().Name} value {number} is outside the range of the UInt16 type."
// The example displays the following output:
//    The Int64 value -9223372036854775808 is outside the range of the UInt16 type.
//    The Int64 value -1 is outside the range of the UInt16 type.
//    Converted the Int64 value '0' to the UInt16 value 0.
//    Converted the Int64 value '121' to the UInt16 value 121.
//    Converted the Int64 value '340' to the UInt16 value 340.
//    The Int64 value 9223372036854775807 is outside the range of the UInt16 type.
Dim numbers() As Long = { Int64.MinValue, -1, 0, 121, 340, Int64.MaxValue }
Dim result As UShort
For Each number As Long In numbers
   Try
      result = Convert.ToUInt16(number)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt16 type.", _
                        number.GetType().Name, number)
   End Try
Next
' The example displays the following output:
'    The Int64 value -9223372036854775808 is outside the range of the UInt16 type.
'    The Int64 value -1 is outside the range of the UInt16 type.
'    Converted the Int64 value '0' to the UInt16 value 0.
'    Converted the Int64 value '121' to the UInt16 value 121.
'    Converted the Int64 value '340' to the UInt16 value 340.
'    The Int64 value 9223372036854775807 is outside the range of the UInt16 type.

適用対象

ToUInt16(Object)

重要

この API は CLS 準拠ではありません。

指定したオブジェクトの値を 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(System::Object ^ value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (object value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (object? value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : obj -> uint16
Public Shared Function ToUInt16 (value As Object) As UShort

パラメーター

value
Object

IConvertible インターフェイスを実装するオブジェクトか、または null

戻り値

UInt16

value と等価の 16 ビット符号なし整数。valuenull の場合は 0。

属性

例外

value が適切な形式ではありません。

valueIConvertible インターフェイスを実装していません。

または

この変換はサポートされていません。

valueMinValue 未満の数値か、MaxValue より大きい数値を表します。

次の例では、オブジェクト配列内の各要素を符号なし 16 ビット整数に変換しようとしています。

object[] values= { true, -12, 163, 935, 'x', new DateTime(2009, 5, 12),
                   "104", "103.0", "-1", "1.00e2", "One", 1.00e2};
ushort result;

foreach (object value in values)
{
   try {
      result = Convert.ToUInt16(value);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt16 type.",
                        value.GetType().Name, value);
   }
   catch (FormatException) {
      Console.WriteLine("The {0} value {1} is not in a recognizable format.",
                        value.GetType().Name, value);
   }
   catch (InvalidCastException) {
      Console.WriteLine("No conversion to a UInt16 exists for the {0} value {1}.",
                        value.GetType().Name, value);
   }
}
// The example displays the following output:
//    Converted the Boolean value 'True' to the UInt16 value 1.
//    The Int32 value -12 is outside the range of the UInt16 type.
//    Converted the Int32 value '163' to the UInt16 value 163.
//    Converted the Int32 value '935' to the UInt16 value 935.
//    Converted the Char value 'x' to the UInt16 value 120.
//    No conversion to a UInt16 exists for the DateTime value 5/12/2009 12:00:00 AM.
//    Converted the String value '104' to the UInt16 value 104.
//    The String value 103.0 is not in a recognizable format.
//    The String value -1 is outside the range of the UInt16 type.
//    The String value 1.00e2 is not in a recognizable format.
//    The String value One is not in a recognizable format.
//    Converted the Double value '100' to the UInt16 value 100.
let values: obj[] =
    [| true; -12; 163; 935; 'x'; DateTime(2009, 5, 12)
       "104"; "103.0"; "-1"; "1.00e2"; "One"; 1.00e2 |]

for value in values do
    try
        let result = Convert.ToUInt16 value
        printfn $"Converted the {value.GetType().Name} value '{value}' to the {result.GetType().Name} value {result}."
    with 
    | :? OverflowException ->
        printfn $"The {value.GetType().Name} value {value} is outside the range of the UInt16 type."
    | :? FormatException ->
        printfn $"The {value.GetType().Name} value {value} is not in a recognizable format."
    | :? InvalidCastException ->
        printfn $"No conversion to a UInt16 exists for the {value.GetType().Name} value {value}."
// The example displays the following output:
//    Converted the Boolean value 'True' to the UInt16 value 1.
//    The Int32 value -12 is outside the range of the UInt16 type.
//    Converted the Int32 value '163' to the UInt16 value 163.
//    Converted the Int32 value '935' to the UInt16 value 935.
//    Converted the Char value 'x' to the UInt16 value 120.
//    No conversion to a UInt16 exists for the DateTime value 5/12/2009 12:00:00 AM.
//    Converted the String value '104' to the UInt16 value 104.
//    The String value 103.0 is not in a recognizable format.
//    The String value -1 is outside the range of the UInt16 type.
//    The String value 1.00e2 is not in a recognizable format.
//    The String value One is not in a recognizable format.
//    Converted the Double value '100' to the UInt16 value 100.
   Dim values() As Object = { True, -12, 163, 935, "x"c, #5/12/2009#, _
                              "104", "103.0", "-1", _
                              "1.00e2", "One", 1.00e2}
   Dim result As UShort
   
   For Each value As Object In values
      Try
         result = Convert.ToUInt16(value)
         Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                           value.GetType().Name, value, _
                           result.GetType().Name, result)
      Catch e As OverflowException
         Console.WriteLine("The {0} value {1} is outside the range of the UInt16 type.", _
                           value.GetType().Name, value)
      Catch e As FormatException
         Console.WriteLine("The {0} value {1} is not in a recognizable format.", _
                           value.GetType().Name, value)
      Catch e As InvalidCastException
         Console.WriteLine("No conversion to an Int16 exists for the {0} value {1}.", _
                           value.GetType().Name, value)
                           
      End Try
   Next                           
   ' The example displays the following output:
'    Converted the Boolean value 'True' to the UInt16 value 1.
'    The Int32 value -12 is outside the range of the UInt16 type.
'    Converted the Int32 value '163' to the UInt16 value 163.
'    Converted the Int32 value '935' to the UInt16 value 935.
'    Converted the Char value 'x' to the UInt16 value 120.
'    No conversion to an Int16 exists for the DateTime value 5/12/2009 12:00:00 AM.
'    Converted the String value '104' to the UInt16 value 104.
'    The String value 103.0 is not in a recognizable format.
'    The String value -1 is outside the range of the UInt16 type.
'    The String value 1.00e2 is not in a recognizable format.
'    The String value One is not in a recognizable format.
'    Converted the Double value '100' to the UInt16 value 100.

注釈

戻り値は、基になる型valueのメソッドをIConvertible.ToUInt16呼び出した結果です。

適用対象

ToUInt16(Byte)

重要

この API は CLS 準拠ではありません。

指定した 8 ビット符号なし整数の値を等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(System::Byte value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (byte value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : byte -> uint16
Public Shared Function ToUInt16 (value As Byte) As UShort

パラメーター

value
Byte

変換する 8 ビット符号なし整数。

戻り値

UInt16

value と等価の 16 ビット符号なし整数。

属性

次の例では、バイト配列内の各要素を符号なし 16 ビット整数に変換します。

byte[] bytes = { Byte.MinValue, 14, 122, Byte.MaxValue};
ushort result;

foreach (byte byteValue in bytes)
{
   result = Convert.ToUInt16(byteValue);
   Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                     byteValue.GetType().Name, byteValue,
                     result.GetType().Name, result);
}
// The example displays the following output:
//       Converted the Byte value '0' to the UInt16 value 0.
//       Converted the Byte value '14' to the UInt16 value 14.
//       Converted the Byte value '122' to the UInt16 value 122.
//       Converted the Byte value '255' to the UInt16 value 255.
let bytes = [| Byte.MinValue; 14uy; 122uy; Byte.MaxValue |]

for byteValue in bytes do
    let result = Convert.ToUInt16 byteValue
    printfn $"Converted the {byteValue.GetType().Name} value '{byteValue}' to the {result.GetType().Name} value {result}."
// The example displays the following output:
//       Converted the Byte value '0' to the UInt16 value 0.
//       Converted the Byte value '14' to the UInt16 value 14.
//       Converted the Byte value '122' to the UInt16 value 122.
//       Converted the Byte value '255' to the UInt16 value 255.
Dim bytes() As Byte = { Byte.MinValue, 14, 122, Byte.MaxValue}
Dim result As UShort

For Each number As Byte In bytes
   result = Convert.ToUInt16(number)
   Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                     number.GetType().Name, number, _
                     result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the Byte value '0' to the UInt16 value 0.
'    Converted the Byte value '14' to the UInt16 value 14.
'    Converted the Byte value '122' to the UInt16 value 122.
'    Converted the Byte value '255' to the UInt16 value 255.

適用対象

ToUInt16(Char)

重要

この API は CLS 準拠ではありません。

指定した Unicode 文字の値を等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(char value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (char value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : char -> uint16
Public Shared Function ToUInt16 (value As Char) As UShort

パラメーター

value
Char

変換する Unicode 文字。

戻り値

UInt16

value と等価な 16 ビット符号なし整数。

属性

次の例では、文字配列内の各要素を符号なし 16 ビット整数に変換します。

char[] chars = { 'a', 'z', '\x0007', '\x03FF',
                 '\x7FFF', '\xFFFE' };
ushort result;

foreach (char ch in chars)
{
   try {
      result = Convert.ToUInt16(ch);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        ch.GetType().Name, ch,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("Unable to convert u+{0} to a UInt16.",
                        ((int)ch).ToString("X4"));
   }
}
// The example displays the following output:
//    Converted the Char value 'a' to the UInt16 value 97.
//    Converted the Char value 'z' to the UInt16 value 122.
//    Converted the Char value '' to the UInt16 value 7.
//    Converted the Char value '?' to the UInt16 value 1023.
//    Converted the Char value '?' to the UInt16 value 32767.
//    Converted the Char value '?' to the UInt16 value 65534.
let chars = 
    [| 'a'; 'z'; '\u0007'; '\u03FF'; '\u7FFF'; '\uFFFE' |]

for ch in chars do
    try
        let result = Convert.ToUInt16 ch
        printfn $"Converted the {ch.GetType().Name} value '{ch}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"Unable to convert u+{int ch:X4} to a UInt16."
// The example displays the following output:
//    Converted the Char value 'a' to the UInt16 value 97.
//    Converted the Char value 'z' to the UInt16 value 122.
//    Converted the Char value '' to the UInt16 value 7.
//    Converted the Char value '?' to the UInt16 value 1023.
//    Converted the Char value '?' to the UInt16 value 32767.
//    Converted the Char value '?' to the UInt16 value 65534.
Dim chars() As Char = { "a"c, "z"c, ChrW(7), ChrW(1023), _
                        ChrW(Short.MaxValue), ChrW(&hFFFE) }
Dim result As UShort
                        
For Each ch As Char in chars
   result = Convert.ToUInt16(ch)
   Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                     ch.GetType().Name, ch, _
                     result.GetType().Name, result)
Next   
' The example displays the following output:
'    Converted the Char value 'a' to the UInt16 value 97.
'    Converted the Char value 'z' to the UInt16 value 122.
'    Converted the Char value '' to the UInt16 value 7.
'    Converted the Char value '?' to the UInt16 value 1023.
'    Converted the Char value '?' to the UInt16 value 32767.
'    Converted the Char value '?' to the UInt16 value 65534.

適用対象

ToUInt16(DateTime)

重要

この API は CLS 準拠ではありません。

このメソッドを呼び出すと、必ず InvalidCastException がスローされます。

public:
 static System::UInt16 ToUInt16(DateTime value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (DateTime value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : DateTime -> uint16
Public Shared Function ToUInt16 (value As DateTime) As UShort

パラメーター

value
DateTime

変換する日時の値。

戻り値

UInt16

この変換はサポートされていません。 値は返されません。

属性

例外

この変換はサポートされていません。

適用対象

ToUInt16(Boolean)

重要

この API は CLS 準拠ではありません。

指定したブール値を等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(bool value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (bool value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : bool -> uint16
Public Shared Function ToUInt16 (value As Boolean) As UShort

パラメーター

value
Boolean

変換するブール値。

戻り値

UInt16

valuetrue の場合は数値の 1。それ以外の場合は 0。

属性

次の例では、ブール値 truefalse 符号なし 16 ビット整数に変換します。

bool falseFlag = false;
bool trueFlag = true;

Console.WriteLine("{0} converts to {1}.", falseFlag,
                  Convert.ToInt16(falseFlag));
Console.WriteLine("{0} converts to {1}.", trueFlag,
                  Convert.ToUInt16(trueFlag));
// The example displays the following output:
//       False converts to 0.
//       True converts to 1.
let falseFlag = false
let trueFlag = true

printfn $"{falseFlag} converts to {Convert.ToInt16 falseFlag}."
printfn $"{trueFlag} converts to {Convert.ToInt16 trueFlag}."
// The example displays the following output:
//       False converts to 0.
//       True converts to 1.
Dim falseFlag As Boolean = False
Dim trueFlag As Boolean = True

Console.WriteLine("{0} converts to {1}.", falseFlag, _
                  Convert.ToUInt16(falseFlag))
Console.WriteLine("{0} converts to {1}.", trueFlag, _
                  Convert.ToUInt16(trueFlag))
' The example displays the following output:
'       False converts to 0.
'       True converts to 1.

適用対象

ToUInt16(Int16)

重要

この API は CLS 準拠ではありません。

指定した 16 ビット符号付き整数の値を等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(short value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (short value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : int16 -> uint16
Public Shared Function ToUInt16 (value As Short) As UShort

パラメーター

value
Int16

変換する 16 ビット符号付き整数。

戻り値

UInt16

value と等価の 16 ビット符号なし整数。

属性

例外

value が 0 未満です。

次の例では、16 ビット整数配列内の各要素を符号なし 16 ビット整数に変換しようとしています。

short[] numbers = { Int16.MinValue, -132, 0, 121, 16103, Int16.MaxValue  };
ushort result;

foreach (short number in numbers)
{
   try {
      result = Convert.ToUInt16(number);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt16 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Int16 value -32768 is outside the range of the UInt16 type.
//    The Int16 value -132 is outside the range of the UInt16 type.
//    Converted the Int16 value '0' to the UInt16 value 0.
//    Converted the Int16 value '121' to the UInt16 value 121.
//    Converted the Int16 value '16103' to the UInt16 value 16103.
//    Converted the Int16 value '32767' to the UInt16 value 32767.
let numbers = [| Int16.MinValue; -132s; 0s; 121s; 16103s; Int16.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"The {number.GetType().Name} value {number} is outside the range of the UInt16 type."
// The example displays the following output:
//    The Int16 value -32768 is outside the range of the UInt16 type.
//    The Int16 value -132 is outside the range of the UInt16 type.
//    Converted the Int16 value '0' to the UInt16 value 0.
//    Converted the Int16 value '121' to the UInt16 value 121.
//    Converted the Int16 value '16103' to the UInt16 value 16103.
//    Converted the Int16 value '32767' to the UInt16 value 32767.
Dim numbers() As Short = { Int16.MinValue, -132, 0, 121, 16103, Int16.MaxValue }
Dim result As UShort

For Each number As Short In numbers
   Try
      result = Convert.ToUInt16(number)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt16 type.", _
                        number.GetType().Name, number)
   End Try
Next
' The example displays the following output:
'    The Int16 value -32768 is outside the range of the UInt16 type.
'    The Int16 value -132 is outside the range of the UInt16 type.
'    Converted the Int16 value '0' to the UInt16 value 0.
'    Converted the Int16 value '121' to the UInt16 value 121.
'    Converted the Int16 value '16103' to the UInt16 value 16103.
'    Converted the Int16 value '32767' to the UInt16 value 32767.

適用対象

ToUInt16(Int32)

重要

この API は CLS 準拠ではありません。

指定した 32 ビット符号付き整数の値を等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(int value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (int value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : int -> uint16
Public Shared Function ToUInt16 (value As Integer) As UShort

パラメーター

value
Int32

変換する 32 ビット符号付き整数。

戻り値

UInt16

value と等価の 16 ビット符号なし整数。

属性

例外

value が 0 未満であるか、MaxValue を超えています。

次の例では、整数配列内の各要素を符号なし 16 ビット整数に変換します。

int[] numbers = { Int32.MinValue, -1, 0, 121, 340, Int32.MaxValue };
ushort result;

foreach (int number in numbers)
{
   try {
      result = Convert.ToUInt16(number);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt16 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Int32 value -2147483648 is outside the range of the UInt16 type.
//    The Int32 value -1 is outside the range of the UInt16 type.
//    Converted the Int32 value '0' to the UInt16 value 0.
//    Converted the Int32 value '121' to the UInt16 value 121.
//    Converted the Int32 value '340' to the UInt16 value 340.
//    The Int32 value 2147483647 is outside the range of the UInt16 type.
let numbers = [| Int32.MinValue; -1; 0; 121; 340; Int32.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn "The {number.GetType().Name} value {number} is outside the range of the UInt16 type."
                        
// The example displays the following output:
//    The Int32 value -2147483648 is outside the range of the UInt16 type.
//    The Int32 value -1 is outside the range of the UInt16 type.
//    Converted the Int32 value '0' to the UInt16 value 0.
//    Converted the Int32 value '121' to the UInt16 value 121.
//    Converted the Int32 value '340' to the UInt16 value 340.
//    The Int32 value 2147483647 is outside the range of the UInt16 type.
Dim numbers() As Integer = { Int32.MinValue, -1, 0, 121, 340, Int32.MaxValue }
Dim result As UShort

For Each number As Integer In numbers
   Try
      result = Convert.ToUInt16(number)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt16 type.", _
                        number.GetType().Name, number)
   End Try
Next
' The example displays the following output:
'    The Int32 value -2147483648 is outside the range of the UInt16 type.
'    The Int32 value -1 is outside the range of the UInt16 type.
'    Converted the Int32 value '0' to the UInt16 value 0.
'    Converted the Int32 value '121' to the UInt16 value 121.
'    Converted the Int32 value '340' to the UInt16 value 340.
'    The Int32 value 2147483647 is outside the range of the UInt16 type.

適用対象

ToUInt16(Decimal)

重要

この API は CLS 準拠ではありません。

指定した 10 進数値を等価の 16 ビット符号なし整数に変換します。

public:
 static System::UInt16 ToUInt16(System::Decimal value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (decimal value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : decimal -> uint16
Public Shared Function ToUInt16 (value As Decimal) As UShort

パラメーター

value
Decimal

変換する 10 進数。

戻り値

UInt16

近似値の 16 ビット符号なし整数に丸められた valuevalue が 2 つの整数のちょうど中間にある場合は、偶数が返されます。つまり、4.5 は 4 に変換され、5.5 は 6 に変換されます。

属性

例外

value が 0 未満であるか、MaxValue を超えています。

次の例では、値の配列内の Decimal 各要素を符号なし 16 ビット整数に変換します。

decimal[] numbers = { Decimal.MinValue, -1034.23m, -12m, 0m, 147m,
                            9214.16m, Decimal.MaxValue };
ushort result;

foreach (decimal number in numbers)
{
   try {
      result = Convert.ToUInt16(number);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException)
   {
      Console.WriteLine("{0} is outside the range of the UInt16 type.",
                        number);
   }
}
// The example displays the following output:
//    -79228162514264337593543950335 is outside the range of the UInt16 type.
//    -1034.23 is outside the range of the UInt16 type.
//    -12 is outside the range of the UInt16 type.
//    Converted the Decimal value '0' to the UInt16 value 0.
//    Converted the Decimal value '147' to the UInt16 value 147.
//    Converted the Decimal value '9214.16' to the UInt16 value 9214.
//    79228162514264337593543950335 is outside the range of the UInt16 type.
let numbers = 
    [| Decimal.MinValue; -1034.23m; -12m; 0m; 147m; 9214.16m; Decimal.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"{number} is outside the range of the UInt16 type."
// The example displays the following output:
//    -79228162514264337593543950335 is outside the range of the UInt16 type.
//    -1034.23 is outside the range of the UInt16 type.
//    -12 is outside the range of the UInt16 type.
//    Converted the Decimal value '0' to the UInt16 value 0.
//    Converted the Decimal value '147' to the UInt16 value 147.
//    Converted the Decimal value '9214.16' to the UInt16 value 9214.
//    79228162514264337593543950335 is outside the range of the UInt16 type.
Dim values() As Decimal = { Decimal.MinValue, -1034.23d, -12d, 0d, 147d, _
                            9214.16d, Decimal.MaxValue }
Dim result As UShort

For Each value As Decimal In values
   Try
      result = Convert.ToUInt16(value)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        value.GetType().Name, value, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("{0} is outside the range of the UInt16 type.", _
                        value)
   End Try   
Next                                  
' The example displays the following output:
'    -79228162514264337593543950335 is outside the range of the UInt16 type.
'    -1034.23 is outside the range of the UInt16 type.
'    -12 is outside the range of the UInt16 type.
'    Converted the Decimal value '0' to the UInt16 value 0.
'    Converted the Decimal value '147' to the UInt16 value 147.
'    Converted the Decimal value '9214.16' to the UInt16 value 9214.
'    79228162514264337593543950335 is outside the range of the UInt16 type.

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