search

ComponentFactory / Krypton

Krypton WinForms components for .NET
BSD 3-Clause "New" or "Revised" License
1.86k stars 681 forks source link

Randomly getting NullReferenceException #254

Open Goddfrey opened 6 months ago

Goddfrey commented 6 months ago

.NET 8.0

Exception occurs sometimes randomly, but there's one scenario when it happens 100 % of the time:

Windows Form with KryptonDataGridView is open. I choose "settings" from the menu strip. SettingsForm.ShowDialog() opens (that has no datagridview). I click OK, settings form closes, main form with KryptonDataGridView is an active window again. I do nothing at all. In about 4 - 6 seconds it crashes with this exception.

There's no code of my own that would track mouse cursor or anything like that.

    at Krypton.Toolkit.KryptonDataGridViewButtonCell.get_MouseInContentBoundsInternal()
   at Krypton.Toolkit.KryptonDataGridViewButtonCell.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.DataGridViewCellPaintingEventArgs.Paint(Rectangle clipBounds, DataGridViewPaintParts paintParts)
   at Krypton.Toolkit.KryptonDataGridView.OnCellPainting(DataGridViewCellPaintingEventArgs e)
   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)
   at System.Windows.Forms.Control.WmPaint(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at Krypton.Toolkit.KryptonDataGridView.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(HWND hWnd, MessageId msg, WPARAM wparam, LPARAM lparam)