String.CompareOrdinal 方法

定义

命名空间:: System

程序集:: mscorlib.dll, System.Runtime.dll

程序集:: netstandard.dll, System.Runtime.dll

程序集:: System.Runtime.dll

程序集:: mscorlib.dll

程序集:: netstandard.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

通过计算每个字符串中相应String对象的数值来比较两Char个对象。

重载

名称	说明
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，比较两个指定Char对象的子字符串。

CompareOrdinal(String, String)

Source:: String.Comparison.cs

Source:: String.Comparison.cs

Source:: String.Comparison.cs

Source:: String.Comparison.cs

Source:: String.Comparison.cs

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。

Int32

一个整数，指示两个比较之间的词法关系。

值	条件
小于零	`strA` 小于 `strB`。
零	`strA` 并且 `strB` 相等。
大于零	`strA` 大于 `strB`。

示例

以下示例执行两个字符串的序号比较，这些字符串仅在大小写时有所不同。

// 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Compare(String, String, StringComparison)comparisonType参数设置为StringComparison.OrdinalIgnoreCase的方法。

因为 CompareOrdinal(String, String) 是静态方法， strAstrB 可以是 null。如果这两个值都是 null，则该方法返回 0（零），这表示 strA 这两个值相 strB 等。如果只有一个值 null，该方法会将非 null 值视为更大。

另请参阅

适用于

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

Source:: String.Comparison.cs

Source:: String.Comparison.cs

Source:: String.Comparison.cs

Source:: String.Comparison.cs

Source:: String.Comparison.cs

通过计算每个子字符串中相应String对象的数值，比较两个指定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

要用于比较的第一个字符串。

indexA: Int32

子字符串的 strA起始索引。

strB: String

要用于比较的第二个字符串。

indexB: Int32

子字符串的 strB起始索引。

length: Int32

要比较的子字符串中的最大字符数。

Int32

一个 32 位有符号整数，指示两个比较之间的词法关系。

值	条件
小于零	子字符串中的`strA`子字符串小于子字符串。`strB`
零	子字符串相等或 `length` 为零。
大于零	中的子字符串`strA`大于子字符串。`strB`

例外

ArgumentOutOfRangeException

strA 不是 null 且 indexA 大于 strA.Length。

-或-

strB 不是 null 且 indexB 大于 strB.Length。

-或-

indexA、 indexB或 length 为负数。

示例

以下示例演示 CompareOrdinal 了 Compare 如何使用不同的排序顺序。

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

和indexAindexBlength参数必须是非负值。

比较的字符数是长度越少strAindexA，长度strB越短，长度indexB越少length。

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Compare(String, Int32, String, Int32, Int32, StringComparison)comparisonType参数设置为StringComparison.OrdinalIgnoreCase的方法。

另请参阅

适用于

反馈

此页面是否有帮助？