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Check the given string is null or empty

   
 
     


Introduction :

In this tutorial we will see how to check the string is null or empty string or not using IsNullOrEmpty() mthod of string class in .NET Framwork with C# and VB.NET code example

IsNullOrEmpty() mthod is one of the important method of string class and frequently used among the programmer to check the string is null or empty.

IsNullOrEmpty() will return Boolean value true if the given string is null or empty string.

C# Sample code sample

using System;

namespace DotNetSpark.Tutorials
{
    class DotNetSpark
    {
        static void Main(string[] args)
        {
            // Declare string
            string strValue = "DotNetSpark";

            // Check the given string is null or empty or not
            bool result = string.IsNullOrEmpty(strValue);

            // Display result
            Console.WriteLine(result);

            Console.ReadLine();

           
        }
    }
}

Output:

False

VB.NET Sample example

Namespace DotNetSpark.Tutorials
	Class DotNetSpark
		Private Shared Sub Main(args As String())
			' Declare string
			Dim strValue As String = "DotNetSpark"

			' Check the given string is null or empty or not
			Dim result As Boolean = String.IsNullOrEmpty(strValue)

			' Display result
			Console.WriteLine(result)

			Console.ReadLine()


		End Sub
	End Class
End Namespace

Output:

False

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  • How to replace string with some other string value?      
  • Remove the specific character or word from a given string      
  • Insert word or characters at any position in a given string or sentence      
  • Display the reverse of the given string      
  • Find string, word or character in a given string      
  • Check the given string is null or empty

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