IdnMapping.UseStd3AsciiRules 属性

public:
 property bool UseStd3AsciiRules { bool get(); void set(bool value); };

public bool UseStd3AsciiRules { get; set; }

member this.UseStd3AsciiRules : bool with get, set

Public Property UseStd3AsciiRules As Boolean

属性值

如果在操作中使用标准命名转换，则为 true；否则为 false。

示例

以下示例生成包含 ASCII 范围（从 U+0000 到 U+007F）中的字符的 URL，并将其传递给 GetAscii(String) 两个 IdnMapping 对象的 方法。 一个对象的 UseStd3AsciiRules 属性设置为 true，另一个对象将其设置为 false。 输出显示当 属性为 true 时无效的字符，UseStd3AsciiRules但在 属性为 false时有效。

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      int nFailed = 0;
      IdnMapping idnStd = new IdnMapping();
      idnStd.UseStd3AsciiRules = true;

      IdnMapping idnRelaxed = new IdnMapping();
      idnRelaxed.UseStd3AsciiRules = false;  // The default, but make it explicit.

      for (int ctr = 0; ctr <= 0x7F; ctr++) {
         string name = $"Prose{ctr}ware.com";

         bool stdFailed = false;
         bool relaxedFailed = false;
         string punyCode = "";
         try {
            punyCode = idnStd.GetAscii(name);
         }
         catch (ArgumentException) {
            stdFailed = true;
         }

         try {
            punyCode = idnRelaxed.GetAscii(name);
         }
         catch (ArgumentException) {
            relaxedFailed = true;
         }

         if (relaxedFailed != stdFailed) {
            Console.Write("U+{0:X4}     ", ctr);
            nFailed++;
            if (nFailed % 5 == 0)
               Console.WriteLine();
         }
      }
   }
}
// The example displays the following output:
//       U+0020     U+0021     U+0022     U+0023     U+0024
//       U+0025     U+0026     U+0027     U+0028     U+0029
//       U+002A     U+002B     U+002C     U+002F     U+003A
//       U+003B     U+003C     U+003D     U+003E     U+003F
//       U+0040     U+005B     U+005C     U+005D     U+005E
//       U+005F     U+0060     U+007B     U+007C     U+007D
//       U+007E

Imports System.Globalization

Module Example
   Public Sub Main()
      Dim nFailed As Integer = 0
      Dim idnStd As New IdnMapping()
      idnStd.UseStd3AsciiRules = True
      
      Dim idnRelaxed As New IdnMapping
      idnRelaxed.UseStd3AsciiRules = False     ' The default, but make it explicit.
      
      For ctr As Integer = 0 To &h7F 
         Dim name As String = "Prose" + ChrW(ctr) + "ware.com"
         
         Dim stdFailed As Boolean = False
         Dim relaxedFailed As Boolean = False
         Dim punyCode As String
         Try
            punyCode = idnStd.GetAscii(name)
         Catch e As ArgumentException
            stdFailed = True
         End Try       
         
         Try
            punyCode = idnRelaxed.GetAscii(name)
         Catch e As ArgumentException
            relaxedFailed = True
         End Try       
         
         If relaxedFailed <> stdFailed Then
            Console.Write("U+{0:X4}     ", ctr)
            nFailed += 1
            If nFailed Mod 5 = 0 Then Console.WriteLine()         
         End If 
      Next   
   End Sub
End Module
' The example displays the following output:
'       U+0020     U+0021     U+0022     U+0023     U+0024
'       U+0025     U+0026     U+0027     U+0028     U+0029
'       U+002A     U+002B     U+002C     U+002F     U+003A
'       U+003B     U+003C     U+003D     U+003E     U+003F
'       U+0040     U+005B     U+005C     U+005D     U+005E
'       U+005F     U+0060     U+007B     U+007C     U+007D
'       U+007E

注解

遵循标准命名规则的域名由 US-ASCII 字符范围中的特定字符子集组成。 字符为字母 A 到 Z，数字 0 到 9，连字符 ( ) 字符 (U+002D) ，句点 (.) 字符。 字符大小写并不重要。 宽松命名约定允许使用更广泛的 ASCII 字符，包括空格字符 (U+0020) 、感叹号字符 (U+0021) ，以及下栏字符 (U+005F) 。 如果 UseStd3AsciiRules 为 true，则方法返回 GetAscii 的标签中只能显示标准字符。

默认情况下， 属性false的UseStd3AsciiRules值为 ，并且允许在标签中使用 ASCII 字符的扩展子集。

适用于