String.CompareOrdinal 方法

定义

通过计算每个字符串中相应 String 对象的数值来比较两个 Char 对象。

重载

CompareOrdinal(String, String)

通过计算每个字符串中相应 String 对象的数值来比较两个指定的 Char 对象。

CompareOrdinal(String, Int32, String, Int32, Int32)

通过计算每个子字符串中相应 String 对象的数值来比较两个指定的 Char 对象的子字符串。

CompareOrdinal(String, String)

通过计算每个字符串中相应 String 对象的数值来比较两个指定的 Char 对象。

public:
 static int CompareOrdinal(System::String ^ strA, System::String ^ strB);
public static int CompareOrdinal (string strA, string strB);
public static int CompareOrdinal (string? strA, string? strB);
static member CompareOrdinal : string * string -> int
Public Shared Function CompareOrdinal (strA As String, strB As String) As Integer

参数

strA
String

要比较的第一个字符串。

strB
String

要比较的第二个字符串。

返回

一个整数,指示两个比较字之间的词法关系。

“值” 条件
小于零strA 小于 strB
strAstrB 相等。
大于零strA 大于 strB

示例

以下示例对两个字符串执行和序号比较,这些字符串仅在大小写上不同。

// Sample for String::CompareOrdinal(String, String)
using namespace System;
int main()
{
   String^ str1 = "ABCD";
   String^ str2 = "abcd";
   String^ str;
   int result;
   Console::WriteLine();
   Console::WriteLine( "Compare the numeric values of the corresponding Char objects in each string." );
   Console::WriteLine( "str1 = '{0}', str2 = '{1}'", str1, str2 );
   result = String::CompareOrdinal( str1, str2 );
   str = ((result < 0) ? "less than" : ((result > 0) ? (String^)"greater than" : "equal to"));
   Console::Write( "String '{0}' is ", str1 );
   Console::Write( "{0} ", str );
   Console::WriteLine( "String '{0}'.", str2 );
}

/*
This example produces the following results:

Compare the numeric values of the corresponding Char objects in each string.
str1 = 'ABCD', str2 = 'abcd'
String 'ABCD' is less than String 'abcd'.
*/
// Sample for String.CompareOrdinal(String, String)
using System;

class Sample {
    public static void Main() {
    String str1 = "ABCD";
    String str2 = "abcd";
    String str;
    int result;

    Console.WriteLine();
    Console.WriteLine("Compare the numeric values of the corresponding Char objects in each string.");
    Console.WriteLine("str1 = '{0}', str2 = '{1}'", str1, str2);
    result = String.CompareOrdinal(str1, str2);
    str = ((result < 0) ? "less than" : ((result > 0) ? "greater than" : "equal to"));
    Console.Write("String '{0}' is ", str1);
    Console.Write("{0} ", str);
    Console.WriteLine("String '{0}'.", str2);
    }
}
/*
This example produces the following results:

Compare the numeric values of the corresponding Char objects in each string.
str1 = 'ABCD', str2 = 'abcd'
String 'ABCD' is less than String 'abcd'.
*/
// Sample for String.CompareOrdinal(String, String)
open System

let str1 = "ABCD"
let str2 = "abcd"

printfn "\nCompare the numeric values of the corresponding Char objects in each string."
printfn $"str1 = '{str1}', str2 = '{str2}'"
let result = String.CompareOrdinal(str1, str2)
let str = if result < 0 then "less than" elif result > 0 then "greater than" else "equal to"
printf $"String '{str1}' is "
printf $"{str} "
printfn $"String '{str2}'."

(*
This example produces the following results:

Compare the numeric values of the corresponding Char objects in each string.
str1 = 'ABCD', str2 = 'abcd'
String 'ABCD' is less than String 'abcd'.
*)
' Sample for String.CompareOrdinal(String, String)
Class Sample
   Public Shared Sub Main()
      Dim str1 As [String] = "ABCD"
      Dim str2 As [String] = "abcd"
      Dim str As [String]
      Dim result As Integer
      
      Console.WriteLine()
      Console.WriteLine("Compare the numeric values of the corresponding Char objects in each string.")
      Console.WriteLine("str1 = '{0}', str2 = '{1}'", str1, str2)
      result = [String].CompareOrdinal(str1, str2)
      str = IIf(result < 0, "less than", IIf(result > 0, "greater than", "equal to"))
      Console.Write("String '{0}' is ", str1)
      Console.Write("{0} ", str)
      Console.WriteLine("String '{0}'.", str2)
   End Sub
End Class
'
'This example produces the following results:
'
'Compare the numeric values of the corresponding Char objects in each string.
'str1 = 'ABCD', str2 = 'abcd'
'String 'ABCD' is less than String 'abcd'.
'

注解

此方法使用序号排序规则执行区分大小写的比较。 有关单词、字符串和序号排序的详细信息,请参阅 System.Globalization.CompareOptions。 若要使用序号排序规则执行不区分大小写的比较,请调用 方法,Compare(String, String, StringComparison)comparisonType并将 参数设置为 StringComparison.OrdinalIgnoreCase

因为 CompareOrdinal(String, String) 是静态方法, strA 并且可以 strBnull。 如果两个值为 null,则该方法返回 0 (零) ,这指示 strAstrB 相等。 如果只有一个值是 null,则该方法认为非 null 值更大。

另请参阅

适用于

CompareOrdinal(String, Int32, String, Int32, Int32)

通过计算每个子字符串中相应 String 对象的数值来比较两个指定的 Char 对象的子字符串。

public:
 static int CompareOrdinal(System::String ^ strA, int indexA, System::String ^ strB, int indexB, int length);
public static int CompareOrdinal (string strA, int indexA, string strB, int indexB, int length);
public static int CompareOrdinal (string? strA, int indexA, string? strB, int indexB, int length);
static member CompareOrdinal : string * int * string * int * int -> int
Public Shared Function CompareOrdinal (strA As String, indexA As Integer, strB As String, indexB As Integer, length As Integer) As Integer

参数

strA
String

要在比较中使用的第一个字符串。

indexA
Int32

strA 中子字符串的起始索引。

strB
String

要在比较中使用的第二个字符串。

indexB
Int32

strB 中子字符串的起始索引。

length
Int32

要比较的子字符串中字符的最大数量。

返回

一个 32 位带符号整数,指示两个比较数之间的词法关系。

“值” 条件
小于零 strA 中的子字符串小于 strB 中的子字符串。
子字符串相等,或者 length 为零。
大于零 strA 中的子字符串大于 strB 中的子字符串。

例外

strA 不为 null ,且 indexA 大于 strA.Length

strB 不为 null ,且 indexB 大于 strB.Length

indexAindexBlength 为负数。

示例

以下示例演示和 CompareOrdinalCompare 使用不同的排序顺序。

using namespace System;
using namespace System::Globalization;
int main()
{
   String^ strLow = "abc";
   String^ strCap = "ABC";
   String^ result = "equal to ";
   int x = 0;
   int pos = 1;
   
   // The Unicode codepoint for 'b' is greater than the codepoint for 'B'.
   x = String::CompareOrdinal( strLow, pos, strCap, pos, 1 );
   if ( x < 0 )
      result = "less than";

   if ( x > 0 )
      result = "greater than";

   Console::WriteLine( "CompareOrdinal(\"{0}\"[{2}], \"{1}\"[{2}]):", strLow, strCap, pos );
   Console::WriteLine( "   '{0}' is {1} '{2}'", strLow[ pos ], result, strCap[ pos ] );

   // In U.S. English culture, 'b' is linguistically less than 'B'.
   x = String::Compare( strLow, pos, strCap, pos, 1, false, gcnew CultureInfo( "en-US" ) );
   if ( x < 0 )
      result = "less than";
   else
   if ( x > 0 )
      result = "greater than";

   Console::WriteLine( "Compare(\"{0}\"[{2}], \"{1}\"[{2}]):", strLow, strCap, pos );
   Console::WriteLine( "   '{0}' is {1} '{2}'", strLow[ pos ], result, strCap[ pos ] );
}
using System;
using System.Globalization;

class Test
{
    public static void Main(String[] args)
    {
    String strLow = "abc";
    String strCap = "ABC";
    String result = "equal to ";
    int x = 0;
    int pos = 1;

// The Unicode codepoint for 'b' is greater than the codepoint for 'B'.
    x = String.CompareOrdinal(strLow, pos, strCap, pos, 1);
    if (x < 0) result = "less than";
    if (x > 0) result = "greater than";
    Console.WriteLine("CompareOrdinal(\"{0}\"[{2}], \"{1}\"[{2}]):", strLow, strCap, pos);
    Console.WriteLine("   '{0}' is {1} '{2}'", strLow[pos], result, strCap[pos]);

// In U.S. English culture, 'b' is linguistically less than 'B'.
    x = String.Compare(strLow, pos, strCap, pos, 1, false, new CultureInfo("en-US"));
    if (x < 0) result = "less than";
    else if (x > 0) result = "greater than";
    Console.WriteLine("Compare(\"{0}\"[{2}], \"{1}\"[{2}]):", strLow, strCap, pos);
    Console.WriteLine("   '{0}' is {1} '{2}'", strLow[pos], result, strCap[pos]);
    }
}
open System
open System.Globalization

[<EntryPoint>]
let main _ =
    let strLow = "abc"
    let strCap = "ABC"
    let result = "equal to "
    let pos = 1

    // The Unicode codepoint for 'b' is greater than the codepoint for 'B'.
    let x = String.CompareOrdinal(strLow, pos, strCap, pos, 1)
    let result =
        if x < 0 then "less than"
        elif x > 0 then "greater than"
        else "equal to"
    printfn $"CompareOrdinal(\"{strLow}\"[{pos}], \"{strCap}\"[{pos}]):"
    printfn $"   '{strLow[pos]}' is {result} '{strCap[pos]}'"

    // In U.S. English culture, 'b' is linguistically less than 'B'.
    let x = String.Compare(strLow, pos, strCap, pos, 1, false, new CultureInfo("en-US"))
    let result =
        if x < 0 then "less than"
        elif x > 0 then "greater than"
        else "equal to"
    printfn $"Compare(\"{strLow}\"[{pos}], \"{strCap}\"[{pos}]):"
    printfn $"   '{strLow[pos]}' is {result} '{strCap[pos]}'"
    0
Imports System.Globalization

Class Test
   
  Public Shared Sub Main(args() As [String])
      Dim strLow As [String] = "abc"
      Dim strCap As [String] = "ABC"
      Dim result As [String] = "equal to "
      Dim x As Integer = 0
      Dim pos As Integer = 1

' The Unicode codepoint for 'b' is greater than the codepoint for 'B'.      
      x = [String].CompareOrdinal(strLow, pos, strCap, pos, 1)
      If x < 0 Then
         result = "less than"
      End If
      If x > 0 Then
         result = "greater than"
      End If

' In U.S. English culture, 'b' is linguistically less than 'B'.
      Console.WriteLine("CompareOrdinal(""{0}"".Chars({2}), ""{1}"".Chars({2})):", strLow, strCap, pos)
      
      Console.WriteLine("   '{0}' is {1} '{2}'", strLow.Chars(pos), result, strCap.Chars(pos))
      
      x = [String].Compare(strLow, pos, strCap, pos, 1, False, New CultureInfo("en-US"))
      If x < 0 Then
         result = "less than"
      ElseIf x > 0 Then
         result = "greater than"
      End If
      Console.WriteLine("Compare(""{0}"".Chars({2}), ""{1}"".Chars({2})):", strLow, strCap, pos)
      Console.WriteLine("   '{0}' is {1} '{2}'", strLow.Chars(pos), result, strCap.Chars(pos))
   End Sub
End Class

注解

indexAindexBlength 参数必须是非否定的。

比较的字符数是长度越少越strA少, 长度strB越少indexB, 和 lengthindexA

此方法使用序号排序规则执行区分大小写的比较。 有关单词、字符串和序号排序的详细信息,请参阅 System.Globalization.CompareOptions。 若要使用序号排序规则执行不区分大小写的比较,请调用 方法,Compare(String, Int32, String, Int32, Int32, StringComparison)comparisonType并将 参数设置为 StringComparison.OrdinalIgnoreCase

因为 CompareOrdinal(String, String) 是静态方法, strA 并且可以 strBnull。 如果两个值为 null,则该方法返回 0 (零) ,这指示 strAstrB 相等。 如果只有一个值是 null,则该方法认为非 null 值更大。

另请参阅

适用于