C# String IsNullOrWhiteSpace

Description

String IsNullOrWhiteSpace indicates whether a specified string is null, empty, or consists only of white-space characters.

Syntax

String.IsNullOrWhiteSpace has the following syntax.

public static bool IsNullOrWhiteSpace(
  string value
)

Parameters

String.IsNullOrWhiteSpace has the following parameters.

• value - The string to test.

Returns

String.IsNullOrWhiteSpace method returns true if the value parameter is null or String.Empty, or if value consists exclusively of white-space characters.

Example

The following example creates a string array, and then passes each element of the array to the IsNullOrWhiteSpace method.

using System;//  www. j a v a  2s.c o  m

public class Example
{
   public static void Main()
   {
      string[] values = { null, String.Empty, "ABCDE", 
                          new String(' ', 20), "  \t   ", 
                          new String('\u2000', 10) };
      foreach (string value in values)
         Console.WriteLine(String.IsNullOrWhiteSpace(value));
   }
}

The code above generates the following result.