OverflowException 類別

定義

當檢查內容中的算數、轉型 (Casting) 或轉換作業發生溢位時所擲回的例外狀況。The exception that is thrown when an arithmetic, casting, or conversion operation in a checked context results in an overflow.

public ref class OverflowException : ArithmeticException
[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public class OverflowException : ArithmeticException
type OverflowException = class
    inherit ArithmeticException
Public Class OverflowException
Inherits ArithmeticException
繼承
屬性

備註

在下列情況下,會在執行時間擲回:OverflowExceptionAn OverflowException is thrown at run time under the following conditions:

  • 算數運算會產生超出運算所傳回之資料類型範圍的結果。An arithmetic operation produces a result that is outside the range of the data type returned by the operation. 下列範例說明OverflowException的乘法運算所擲回的, 會超出Int32類型的範圍。The following example illustrates the OverflowException that is thrown by a multiplication operation that overflows the bounds of the Int32 type.

    int value = 780000000;
    checked {
    try {
       // Square the original value.
       int square = value * value; 
       Console.WriteLine("{0} ^ 2 = {1}", value, square);
    }
    catch (OverflowException) {
       double square = Math.Pow(value, 2);
       Console.WriteLine("Exception: {0} > {1:E}.", 
                         square, Int32.MaxValue);
    } }
    // The example displays the following output:
    //       Exception: 6.084E+17 > 2.147484E+009.
    
    Dim value As Integer = 780000000
    Try
       ' Square the original value.
       Dim square As Integer = value * value 
       Console.WriteLine("{0} ^ 2 = {1}", value, square)
    Catch e As OverflowException
       Dim square As Double = Math.Pow(value, 2)
       Console.WriteLine("Exception: {0} > {1:E}.", _
                         square, Int32.MaxValue)
    End Try
    ' The example displays the following output:
    '       Exception: 6.084E+17 > 2.147484E+009.
    
  • 轉換或轉換作業嘗試執行縮小轉換, 且源資料類型的值超出目標資料類型的範圍。A casting or conversion operation attempts to perform a narrowing conversion, and the value of the source data type is outside the range of the target data type. 下列範例說明OverflowException嘗試將不帶正負號的位元組值轉換成帶正負號的位元組值時, 所擲回的。The following example illustrates the OverflowException that is thrown by the attempt to convert a large unsigned byte value to a signed byte value.

    byte value = 241;
    checked {
    try {
       sbyte newValue = (sbyte) value;
       Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", 
                         value.GetType().Name, value, 
                         newValue.GetType().Name, newValue);
    }
    catch (OverflowException) {
       Console.WriteLine("Exception: {0} > {1}.", value, SByte.MaxValue);
    } }                            
    // The example displays the following output:
    //       Exception: 241 > 127.
    
    Dim value As Byte = 241
    Try
       Dim newValue As SByte = (CSByte(value))
       Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                         value.GetType().Name, value, _
                         newValue.GetType().Name, newValue)
    Catch e As OverflowException
       Console.WriteLine("Exception: {0} > {1}.", value, SByte.MaxValue)
    End Try                            
    ' The example displays the following output:
    '       Exception: 241 > 127.
    

在每個案例中, 作業的結果會是小於MinValue屬性的值, 或大於MaxValue作業所產生之資料類型的屬性。In each case, the result of the operation is a value that is less than the MinValue property or greater than the MaxValue property of the data type that results from the operation.

若要讓算術、轉型或轉換作業擲OverflowException回, 此作業必須發生在已檢查的內容中。For the arithmetic, casting, or conversion operation to throw an OverflowException, the operation must occur in a checked context. 預設會檢查 Visual Basic 中的算數運算和溢位;在C#中, 則不是。By default, arithmetic operations and overflows in Visual Basic are checked; in C#, they are not. 如果作業發生在未檢查的內容中, 則會捨棄不符合目的地類型的任何高序位位來截斷結果。If the operation occurs in an unchecked context, the result is truncated by discarding any high-order bits that do not fit into the destination type. 下列範例說明中的這項C#未檢查的轉換。The following example illustrates such an unchecked conversion in C#. 它會在未檢查的內容中重複先前的範例。It repeats the previous example in an unchecked context.

byte value = 241;
try {
   sbyte newValue = (sbyte) value;
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", 
                     value.GetType().Name, value, 
                     newValue.GetType().Name, newValue);
}
catch (OverflowException) {
   Console.WriteLine("Exception: {0} > {1}.", value, SByte.MaxValue);
}
// The example displays the following output:
//       Converted the Byte value 241 to the SByte value -15.

下列 Microsoft 中繼語言 (MSIL) 指令會擲OverflowException回:The following Microsoft intermediate language (MSIL) instructions throw an OverflowException:

  • add.ovf.簽署的 <>add.ovf. <signed>

  • conv.ovf.若要輸入 > <conv.ovf. <to type>

  • conv.ovf.若要輸入 > <.unconv.ovf. <to type> .un

  • mul.ovf. <type>mul.ovf. <type>

  • sub.ovf. <type>sub.ovf. <type>

  • newarr

OverflowException使用 HRESULT COR_E_OVERFLOW, 其值為0x80131516。OverflowException uses the HRESULT COR_E_OVERFLOW, which has the value 0x80131516.

如需執行個體的初始屬性值的清單OverflowException,請參閱OverflowException建構函式。For a list of initial property values for an instance of OverflowException, see the OverflowException constructors.

建構函式

OverflowException()

初始化 OverflowException 類別的新執行個體。Initializes a new instance of the OverflowException class.

OverflowException(SerializationInfo, StreamingContext)

使用序列化資料,初始化 OverflowException 類別的新執行個體。Initializes a new instance of the OverflowException class with serialized data.

OverflowException(String)

使用指定的錯誤訊息,初始化 OverflowException 類別的新執行個體。Initializes a new instance of the OverflowException class with a specified error message.

OverflowException(String, Exception)

使用指定的錯誤訊息以及造成此例外狀況的內部例外狀況的參考,初始化 OverflowException 類別的新執行個體。Initializes a new instance of the OverflowException class with a specified error message and a reference to the inner exception that is the cause of this exception.

屬性

Data

取得提供例外狀況之其他使用者定義相關資訊的索引鍵/值組集合。Gets a collection of key/value pairs that provide additional user-defined information about the exception.

(繼承來源 Exception)
HelpLink

取得或設定與這個例外狀況相關聯的說明檔連結。Gets or sets a link to the help file associated with this exception.

(繼承來源 Exception)
HResult

取得或設定 HRESULT,它是指派給特定例外狀況的編碼數值。Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception.

(繼承來源 Exception)
InnerException

取得造成目前例外狀況的 Exception 執行個體。Gets the Exception instance that caused the current exception.

(繼承來源 Exception)
Message

取得描述目前例外狀況的訊息。Gets a message that describes the current exception.

(繼承來源 Exception)
Source

取得或設定造成錯誤的應用程式或物件的名稱。Gets or sets the name of the application or the object that causes the error.

(繼承來源 Exception)
StackTrace

取得呼叫堆疊上即時運算框架的字串表示。Gets a string representation of the immediate frames on the call stack.

(繼承來源 Exception)
TargetSite

取得擲回目前例外狀況的方法。Gets the method that throws the current exception.

(繼承來源 Exception)

方法

Equals(Object)

判斷指定的物件是否等於目前的物件。Determines whether the specified object is equal to the current object.

(繼承來源 Object)
GetBaseException()

在衍生類別中覆寫時,傳回一或多個後續的例外狀況的根本原因 ExceptionWhen overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions.

(繼承來源 Exception)
GetHashCode()

作為預設雜湊函數。Serves as the default hash function.

(繼承來源 Object)
GetObjectData(SerializationInfo, StreamingContext)

在衍生類別中覆寫時,使用例外狀況的資訊設定 SerializationInfoWhen overridden in a derived class, sets the SerializationInfo with information about the exception.

(繼承來源 Exception)
GetType()

取得目前執行個體的執行階段類型。Gets the runtime type of the current instance.

(繼承來源 Exception)
MemberwiseClone()

建立目前 Object 的淺層複製。Creates a shallow copy of the current Object.

(繼承來源 Object)
ToString()

建立並傳回目前例外狀況的字串表示。Creates and returns a string representation of the current exception.

(繼承來源 Exception)

事件

SerializeObjectState

當例外狀況序列化,以建立包含例外狀況相關序列化資料的例外狀況狀態物件時,就會發生此事件。Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception.

(繼承來源 Exception)

適用於

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