Extend string with own methods

November 12, 2009 ASP.NET C# Nils Snippet

Here's a nice little sample submitted by Nils Forsman on how to extend the String object.

public static class StringExtension
  {
    public static String AddSlashAfter(this String input)
    {
      return String.Concat(input, @"\");
    }
    public static String AddSlashBefore(this String input)
    {
      return String.Concat(@"\", input);
    }

    public static String Left(this String input, Int32 length)
    {
      if (length > input.Length)
      {
        return input;
      }
      return input.Substring(0, length);
    }

    public static String Right(this String input, Int32 length)
    {
      if (length > input.Length)
      {
        return input;
      }
      Int32 StartPosition = input.Length - length;
      return input.S
       return input.Substring(StartPosition, length);
    }
  
    public static String Mid(this String input, Int32 start, Int32 length)
    {
      if (start > input.Length)
      {
        return String.Empty;
      }
      if ((start + length) > input.Length)
      {
        return input.Substring(start);
      }
      return input.Substring(start, length);
    }
  }

You'll then able to access your new methods on any string object, for example filePath.AddSlashAfter()

Extend string with own methods

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