How to check whether string has been assigned a value or not?

 Posted by Rajesh_Kumar on 1/20/2014 | Category: C# Interview questions | Views: 819 | Points: 40
Answer:

With the help of IsNullOrEmpty method of string,we can check whether string has a value or not.It returns True or False.
Basically IsNullOrEmpty checks whether string contains value or not.

For Example:-

string str = null;


if(string.IsNullOrEmpty(str))
MessageBox.Show('value is null');
else
MessageBox.Show('value is not null');


Output would be 'value is null' because str varaible has not assigned any value.


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