Gridview Postback Problem

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ASP.NET

Hi All,

I have a GridView in an UpdatePanel. I have two buttons (Build and Run) in same UpdatePanel. When I click Run it is assigning datasource and Binding to Gridview. When I click Build, It just updates a textbox, nothing to do with Gridview. As this Build button causes UpdatePanel to update, my gridview is showing CheckBoxes in few columns which are of Bit datatype in database. These check boxes are not getting displayed when I click RUN. What happening is, I could not understand. Help me please..

Assumptions:
1) Gridview no template/ bound columns. All are Autogenerated columns.(* Mandatory)
2) Bit datatype columns are getting displayed empty when I click RUN button.
3) When I click Build, it is showing CheckBoxes in Bit datatype columns in GridView.

help me out please...

Thanks
Ramesh Sambari