Grid View Delete

[bbawa1]

I have the followning code in my HTML part. But when I click on Deletw
link it deleted the record from gridview as well as from Datasource
but it give me following error page
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 Details: System.NotSuppo rtedException: Updating is not
supported by ObjectDataSourc e 'ObjectDataSour ce1' unless the
deleteMethod is specified.


Here Is the code

DataKeyNames="U serId" DataSourceID="O bjectDataSource 1"
OnRowCommand="g dAddUser_RowCom mand"
OnRowDataBound= "gdAddUser_RowD ataBound"
OnRowDeleting=" gdAddUser_RowDe leting"
Width="390px"
önSelectedIndex Changed="gdAddU ser_SelectedInd exChanged"
AutoGenerateEdi tButton="True">

CommandArgument ='<%# Eval("UserId") %>'
CommandName ="Delete">
Delete

protected void gdAddUser_RowDa taBound(object sender,
GridViewRowEven tArgs e)
{
if (e.Row.RowType == DataControlRowT ype.DataRow)
{
LinkButton l = (LinkButton)e.R ow.FindControl( "LinkButton 1");
l.Attributes.Ad d("onclick", "javascript:ret urn " +
"confirm('A re you sure you want to delete this record " +
DataBinder.Eval (e.Row.DataItem , "UserId") + "')");
}

}
protected void gdAddUser_RowCo mmand(object sender,
GridViewCommand EventArgs e)
{
if (e.CommandName == "Delete")
{
// get the categoryID of the clicked row
int AppId = Convert.ToInt32 (e.CommandArgum ent);
// Delete the record
DeleteRecordByI D(AppId);
// Implement this on your own
}

}
//protected void gdAddUser_RowDe leted(object sender,
GridViewDeleted EventArgs e)

//}
protected void gdAddUser_RowDe leting(object sender,
GridViewDeleteE ventArgs e)
{
int AppId = (int)gdAddUser. DataKeys[e.RowIndex].Value;
DeleteRecordByI D(AppId);//implement yourself
}