Question

I need to get the DataKeyNames in codebehind of my ASP.NET application (VB.NET). How can I get that?

Answer 1

This way (VB.NET code):

 For Each dkn As String in GridView1.DataKeyNames      ' -- Do something here with dkn  Next 

DataKeyNames is an array of strings, so there can be more than one in a GridView. You can access the array members this way (example):

Dim FirstKeyName as String = GridView1.DataKeyNames(0) 

Here is the documentation on MSDN of the DataKeyNames property.