C# Char IsHighSurrogate(String, Int32)

Description

Char IsHighSurrogate(String, Int32) indicates whether the Char object at the specified position in a string is a high surrogate.

Syntax

Char.IsHighSurrogate(String, Int32) has the following syntax.


public static bool IsHighSurrogate(
  string s,
  int index
)

Parameters

Char.IsHighSurrogate(String, Int32) has the following parameters.

s - A string.
index - The position of the character to evaluate in s.

Returns

Char.IsHighSurrogate(String, Int32) method returns true if the numeric value of the specified character in the s parameter ranges from U+D800 through U+DBFF; otherwise, false.

Example

The following code example demonstrates the IsHighSurrogate method.


using System;/*  w  w  w  . j  a v  a 2s.c  om*/

class Sample 
{
    public static void Main() 
    {
        char cHigh = '\uD800';
        char cLow  = '\uDC00';
        string s1  = new String(new char[] {'a', '\uD800', '\uDC00', 'z'});
    
    
        Console.WriteLine("Is each of the following characters a high surrogate?");
        Console.WriteLine("A1) cLow?  - {0}", Char.IsHighSurrogate(cLow));
        Console.WriteLine("A2) cHigh? - {0}", Char.IsHighSurrogate(cHigh));
        Console.WriteLine("A3) s1[0]? - {0}", Char.IsHighSurrogate(s1, 0));
        Console.WriteLine("A4) s1[1]? - {0}", Char.IsHighSurrogate(s1, 1));
    }
}

The code above generates the following result.