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C# IsNullOrWhiteSpace() Method
The IsNullOrWhiteSpace() method in C# is used to indicate whether a specified string is null, empty, or consists only of white-space characters.
Syntax
public static bool IsNullOrWhiteSpace (string val);
Above, the parameter val is the string to test. Let us now see an example −
Example
Let us now see an example:
using System;
public class Demo {
public static void Main() {
string str1 = null;
string str2 = String.Empty;
Console.WriteLine("Is string1 null or whitespace? = "+String.IsNullOrWhiteSpace(str1));
Console.WriteLine("Is string2 null or whitespace? = "+String.IsNullOrWhiteSpace(str2));
}
}Output
This will produce the following output -
Is string1 null or whitespace? = True Is string2 null or whitespace? = True
Example
Let us now see another example -
using System;
public class Demo {
public static void Main() {
string str1 = "
";
string str2 = "Tim";
Console.WriteLine("Is string1 null or whitespace? = "+String.IsNullOrWhiteSpace(str1));
Console.WriteLine("Is string2 null or whitespace? = "+String.IsNullOrWhiteSpace(str2));
}
}Output
Is string1 null or whitespace? = True Is string2 null or whitespace? = False
Updated on: 03-Dec-2019
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