DataGridView 使用时候出现大红叉

Question

出现应用程序未处理的异常/n异常类型：NullReferenceException/n异常消息：Object reference not set to an instance of an object./n异常位置：   at System.Windows.Forms.DataGridViewTextBoxCell.PaintPrivate(Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, Int32 rowIndex, DataGridViewElementStates cellState, Object formattedValue, String errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts, Boolean computeContentBounds, Boolean computeErrorIconBounds, Boolean paint)
   at System.Windows.Forms.DataGridViewTextBoxCell.Paint(Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, Int32 rowIndex, DataGridViewElementStates cellState, Object value, Object formattedValue, String errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts)
   at cxqywsite.TreeGridCell.Paint(Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, Int32 rowIndex, DataGridViewElementStates cellState, Object value, Object formattedValue, String errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts)
   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)/n
未将对象实例化的错误，导致控件重绘的时候出现错误，怎么不让他出现大红叉呢？此错误是偶尔出现，不是一直出现，数据又太多，不要一一调试。

Answer 1

NullReferenceException
有NULL值

Answer 2

在grid的
private void dataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs e)
        {        }事件里处理

Answer 3

null值是怎么出现的？你不想调一下？

Answer 4

NullReferenceException
有NULL值     什么意思？如何获取到null值

Answer 5

出现应用程序未处理的异常/n异常类型：ArgumentException/n异常消息：InvalidArgument=“490”的值对于“rowIndex”无效。/n异常位置：   在 System.Windows.Forms.DataGridViewRow.GetState(Int32 rowIndex)
   在 System.Windows.Forms.DataGridViewRowCollection.GetRowState(Int32 rowIndex)
   在 System.Windows.Forms.DataGridView.ComputeHeightOfFittingTrailingScrollingRows(Int32 totalVisibleFrozenHeight)
   在 System.Windows.Forms.DataGridView.set_VerticalOffset(Int32 value)
   在 System.Windows.Forms.DataGridView.DataGridViewVScrolled(Object sender, ScrollEventArgs se)
   在 System.Windows.Forms.ScrollBar.OnScroll(ScrollEventArgs se)
   在 System.Windows.Forms.ScrollBar.DoScroll(ScrollEventType type)
   在 System.Windows.Forms.ScrollBar.WmReflectScroll(Message& m)
   在 System.Windows.Forms.ScrollBar.WndProc(Message& m)
   在 System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   在 System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   在 System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)/n