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将 UserControl 添加到 DevExpress 的图片编辑控件后，我能够成功地将其放置在某个位置并保存更改。

重新打开应用程序后，当我用图像填充 PictureEdit 然后将 UserControl 添加到 pictureEdit 控件集合时，错误图像显示在 PictureEdit 中以及消息“对象引用未设置为对象实例”-> 空引用。

System.NullReferenceException: Object reference not set to an instance of an object.
   at DevExpress.XtraEditors.PictureEditScrollers.SetScrollBarValues()
   at DevExpress.XtraEditors.PictureEditScrollers.DisplayScrollBars()
   at DevExpress.XtraEditors.PictureEditScrollers.TryDisplayScrollBars(Boolean force)
   at DevExpress.XtraEditors.PictureEdit.UpdateViewInfo(Graphics g)
   at DevExpress.XtraEditors.BaseControl.OnPaint(PaintEventArgs e)
   at System.Windows.Forms.Control.PaintTransparentBackground(PaintEventArgs e, Rectangle rectangle, Region transparentRegion)
   at System.Windows.Forms.Control.PaintTransparentBackground(PaintEventArgs e, Rectangle rectangle)
   at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle, Color backColor, Point scrollOffset)
   at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle)
   at System.Windows.Forms.Control.OnPaintBackground(PaintEventArgs pevent)
   at System.Windows.Forms.ScrollableControl.OnPaintBackground(PaintEventArgs e)
   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
   at System.Windows.Forms.Control.WmEraseBkgnd(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

但是，如果我没有将 UserControl 添加到控件集合中，则图像会完美显示，但是我会丢失对 PictureEdit 的用户控制。

有什么建议吗？

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1 回答 1

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以防万一对其他人有帮助：

强制创建您的控件。

picEdit.CreateControl();
于 2013-10-10T05:53:31.993 回答