ASP.Net Connection string Error: Object reference not set to an instance of an object

Last Reply one year ago By pandeyism

Posted one year ago

I was trying to implements gridview sorting system from this articles :

Handle Sorting event in GridView in ASP.Net

But, after I've modificated the code to suit it with my project it happens to be "NullReferenceException Was Unhandled By User Code".

Screenshot :

What should I do ?