Type : System.NullReferenceException
Message : 未将对象引用设置到对象的实例。
Source : Syncfusion.Grid.Grouping
Help link :
TargetSite : Syncfusion.Windows.Forms.Grid.Grouping.GridSummaryColumnDescriptor GetSummaryColumnAtCol(Int32)
exceptionType : at Syncfusion.Windows.Forms.Grid.Grouping.GridSummaryRowDescriptor.GetSummaryColumnAtCol(Int32 col)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTable.CreateTableCellIdentity(Element element, Int32 rowIndex, Int32 colIndex)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTable.CreateTableCellStyle(Element element, Int32 rowIndex, Int32 colIndex)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTable.GetTableCellStyle(Int32 rowIndex, Int32 colIndex)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTableControl.GetTableViewStyleInfo(Int32 rowIndex, Int32 colIndex)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTableControl.OnCellTipsMouseMove(MouseEventArgs e)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTableControl.OnMouseMove(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseMove(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at Syncfusion.Windows.Forms.ScrollControl.WndProc(Message& msg)
at Syncfusion.Windows.Forms.Grid.GridControlBase.WndProc(Message& msg)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTableControl.WndProc(Message& msg)
at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
