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Run time error with combo box summary cell

Thread ID:





23838 Jan 20,2005 06:28 PM UTC Jan 21,2005 12:04 PM UTC WinForms 3
Tags: Grouping
Anthony Avella
Asked On January 20, 2005 06:28 PM UTC

While trying to enter a combo box summary cell, I receive the following runtime error and my app. just crashes. This does not happen while accessing a combobox detail row. Any ideas?? Error Message: Object reference not set to an instance of an object. Source: at Syncfusion.Windows.Forms.Grid.Grouping.GridTableModel.GetStyleDataSource(GridStyleInfo style) at Syncfusion.Windows.Forms.Grid.GridComboBoxCellModel.GetDataSource(GridStyleInfo style) at Syncfusion.Windows.Forms.Grid.GridComboBoxCellModel.FillWithChoices(ListBox listBox, GridStyleInfo style, Boolean& exclusive) at Syncfusion.Windows.Forms.Grid.GridComboBoxCellRenderer.OnInitialize(Int32 rowIndex, Int32 colIndex) at Syncfusion.Windows.Forms.Grid.GridCellRendererBase.Initialize(Int32 rowIndex, Int32 colIndex) at Syncfusion.Windows.Forms.Grid.GridCurrentCell.Refresh() at Syncfusion.Windows.Forms.Grid.GridControlBase.Refresh(Boolean fromModel) at Syncfusion.Windows.Forms.Grid.Grouping.GridTableControl.Refresh(Boolean fromModel) at Syncfusion.Windows.Forms.Grid.GridControlBase.Refresh() at Syncfusion.Windows.Forms.Grid.GridControlBase.OnMouseDown(MouseEventArgs e) at System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at Syncfusion.Windows.Forms.ScrollControl.WmMouseDown(Message& msg) 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.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) at System.Windows.Forms.ComponentManager.System.Windows.Forms.UnsafeNativeMethods+IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData) at System.Windows.Forms.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) at System.Windows.Forms.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)

Administrator [Syncfusion]
Replied On January 20, 2005 09:29 PM UTC

Summary cells generally are not editable. What are you trying to accomplish by using a combobox in asummary cell?

Anthony Avella
Replied On January 21, 2005 10:35 AM UTC

We have made our summary cells editable using your guidance over the months. Since my summary cell is a drop down, I would like to be able to change the value and programatically update the detail cell under the summary cell. >Summary cells generally are not editable. What are you trying to accomplish by using a combobox in asummary cell?

Administrator [Syncfusion]
Replied On January 21, 2005 12:04 PM UTC

Anthony, Did you specify a choice list or set the DataSource property for that combobox cell? Only then if neither datasource nor ChoiceList was set then the combobox will query Model.GetStyleDataSource. Stefan


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