C# StringBuilder Append(Char[], Int32, Int32)

Description

StringBuilder Append(Char[], Int32, Int32) Appends the string representation of a specified subarray of Unicode characters to this instance.

Syntax

StringBuilder.Append(Char[], Int32, Int32) has the following syntax.

public StringBuilder Append(
  char[] value,/* w  w w . j  a va  2  s.c o  m*/
  int startIndex,
  int charCount
)

Parameters

StringBuilder.Append(Char[], Int32, Int32) has the following parameters.

• value - A character array.
• startIndex - The starting position in value.
• charCount - The number of characters to append.

Returns

StringBuilder.Append(Char[], Int32, Int32) method returns A reference to this instance after the append operation has completed.

Example

using System;/* w w  w  .j a v a 2  s .co m*/
using System.Text;
using System.Globalization;

class Sample 
{
    public static void Main() 
    {
        char[] chars = { 'a', 'b', 'c', 'd', 'e'};
        System.Text.StringBuilder sb = new System.Text.StringBuilder();
        int startPosition = Array.IndexOf(chars, 'a');
        int endPosition = Array.IndexOf(chars, 'c');
        if (startPosition >= 0 && endPosition >= 0) {
           sb.Append(chars, startPosition, endPosition + 1);
           Console.WriteLine(sb);
        }
    }
}

The code above generates the following result.