Artigo
11/18/2011

Char.IsSeparator Method (String, Int32)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Indicates whether the character at the specified position in a specified string is categorized as a separator character.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

Syntax

'Declaration
Public Shared Function IsSeparator ( _
    s As String, _
    index As Integer _
) As Boolean

public static bool IsSeparator(
    string s,
    int index
)

Parameters

s
Type: System.String
A string.

index
Type: System.Int32
The character position in s.

Return Value

Type: System.Boolean
true if the character at position index in s is a separator character; otherwise, false.

Exceptions

Exception	Condition
ArgumentNullException	s is nulla null reference (Nothing in Visual Basic).
ArgumentOutOfRangeException	index is less than zero or greater than the last position in s.

Remarks

Character positions in a string are indexed starting from zero.

The Unicode standard recognizes three subcategories of separators:

Space separators (the UnicodeCategory.SpaceSeparator category), which includes characters such as \u0020.
Line separators (the UnicodeCategory.LineSeparator category), which includes \u2028.
Paragraph separators (the UnicodeCategory.ParagraphSeparator category), which includes \u2029.

Note:
The Unicode standard classifies the characters \u000A (LF), \u000C (FF), and \u000A (CR) as control characters (members of the UnicodeCategory.Control category), not as separator characters.

Examples

The following example demonstrates IsSeparator.


Module Example

   Public Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)

      Dim str As String
      str = "twain1 twain2"

      outputBlock.Text &= Char.IsSeparator("a"c) & vbCrLf       ' Output: "False"
      outputBlock.Text += String.Format(Char.IsSeparator(str, 6)) & vbCrLf     ' Output: "True"

   End Sub

End Module

using System;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      string str = "twain1 twain2";

      outputBlock.Text += Char.IsSeparator('a') + "\n";     // Output: "False"
      outputBlock.Text += Char.IsSeparator(str, 6) + "\n";  // Output: "True"
   }
}

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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