Stack Trace: [ArgumentOutOfRangeException: Specified argument was out of the range of valid values. Parameter name: value] System.Web.UI.WebControls.GridView.set_SelectedIndex(Int32 value) +280 System.Web.UI.WebControls.GridView.HandleDeleteCallback(Int32 affectedRows, Exception ex) +352 System.Web.UI.DataSourceView.Delete(IDictionary keys, IDictionary oldValues, DataSourceViewOperationCallback callback) +119 System.Web.UI.WebControls.GridView.HandleDelete(GridViewRow row, Int32 rowIndex) +927 System.Web.UI.WebControls.GridView.HandleEvent(EventArgs e, Boolean causesValidation, String validationGroup) +1152 System.Web.UI.WebControls.GridView.RaisePostBackEvent(String eventArgument) +190 System.Web.UI.WebControls.GridView.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7 System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +170 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4921