C# - Error Paging And Editing In Gridview

Oct 14, 2010

I had gridview which retrieve Products from database by sqldatasource1 ,and my manager asked me to filter this gridview by DDL to filter gridview with specfic Model ,I add some function on gridview as edit,paging .I did my code well and gridview filtred by the Model_Id which come from DDL .But when I tried to edit any product or navigate through paging I faced this error (The GridView 'GridView1' fired event PageIndexChanging which wasn't handled. )when paging ,And this for editing (The GridView 'GridView1' fired event RowEditing which wasn't handled.)

protected void Page_Load(object sender, EventArgs e)
BindGridFunction();
[code]...

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Get An Error While Editing Gridview?

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[Code]....

It doesnot cause any problem. But when i tried editing and click on edit button of my grid. It throws error in rowdatabound event's second line starting with decimal rejp.

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[Code]....

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[Code] .... 

Error is:- The data source does not support server-side data paging.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception
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Source Error: 
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[Code]....

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[Code]....

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ASP.NET - C# (C Sharp) - SQL Server

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[Code]....

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[Code]....

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[code]....

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[Code]....

[Code]....

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[Code] ....

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[Code]....

[Code]....

And the C# behind:

[Code]....

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Here is the page and the selectedIndexChanged sub for the piece of work I'm trying to accomplish...

[Code]....

Gridview2 is inside formview3 inside formview1I have included the whole page below, but the problem area is gridview2[Code]....

The error I get is:

[Code]....

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[Code]....

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