在Visual Studio 2008 pro（版本9.0.30729.1 SP）中，在尝试对具有多个表的数据集使用数据集可视化工具时，我总是会收到错误。第一个表很好，当我选择任何其他表时，我得到下面的消息。通过在每张桌子上添加手表很容易解决，但仍然很烦人。其他人有这个问题吗？
************** Exception Text ************** System.NullReferenceException: Object reference not set to an instance of an object. at EnhancedDataSetVisualizer.VisualizerCommunicator.GetTableCellValue(Int32 rowIndex, Int32 colIndex) at EnhancedDataSetVisualizer.DataSetForm.dataGridView_CellValueNeeded(Object sender, DataGridViewCellValueEventArgs e) at System.Windows.Forms.DataGridView.OnCellValueNeeded(DataGridViewCellValueEventArgs e) at System.Windows.Forms.DataGridView.OnCellValueNeeded(Int32 columnIndex, Int32 rowIndex) at System.Windows.Forms.DataGridViewCell.GetValue(Int32 rowIndex) at System.Windows.Forms.DataGridViewCell.PaintWork(Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, Int32 rowIndex, DataGridViewElementStates cellState, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts) at System.Windows.Forms.DataGridViewRow.PaintCells(Graphics graphics, Rectangle clipBounds, Rectangle rowBounds, Int32 rowIndex, DataGridViewElementStates rowState, Boolean isFirstDisplayedRow, Boolean isLastVisibleRow, DataGridViewPaintParts paintParts) at System.Windows.Forms.DataGridViewRow.Paint(Graphics graphics, Rectangle clipBounds, Rectangle rowBounds, Int32 rowIndex, DataGridViewElementStates rowState, Boolean isFirstDisplayedRow, Boolean isLastVisibleRow) at System.Windows.Forms.DataGridView.PaintRows(Graphics g, Rectangle boundingRect, Rectangle clipRect, Boolean singleHorizontalBorderAdded) at System.Windows.Forms.DataGridView.PaintGrid(Graphics g, Rectangle gridBounds, Rectangle clipRect, Boolean singleVerticalBorderAdded, Boolean singleHorizontalBorderAdded) at System.Windows.Forms.DataGridView.OnPaint(PaintEventArgs e) at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs) at System.Windows.Forms.Control.WmPaint(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.DataGridView.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)