如何在窗口控件上使用wpf中的DoDragDrop [英] how to use DoDragDrop in wpf on window control

问题描述

我在wpf中有一个图片框。

代码是..

I have a picture box in wpf.
code is ..

<DockPanel Height="237">
                           <WindowsFormsHost Height="237">
                               <wf:PictureBox x:Name="LiveImage" MouseDown="LiveImage_MouseDown"/>
                           </WindowsFormsHost>
                       </DockPanel>

private void LiveImage_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
       {

           if (IsCropFrame)
           {
               try
               {

                   CropPicture = new PictureBox();
                   CropPicture.CreateControl();
                   CropPicture.Width = 132;
                   CropPicture.Height = 170;
                   CropPicture.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;

                   cropPen = new System.Drawing.Pen(System.Drawing.Color.Blue, 1);
                   LiveImage.CreateGraphics().DrawRectangle(cropPen, cropX, cropY, 132, 170);
                   IsCropFrame = false;
                   CropPicture.MouseDown += new System.Windows.Forms.MouseEventHandler(CropPicture_MouseDown);
                   CropPicture.MouseMove += new System.Windows.Forms.MouseEventHandler(CropPicture_MouseMove);
                   CropPicture.MouseUp += new System.Windows.Forms.MouseEventHandler(CropPicture_MouseUp);

                   //if (e.Button == MouseButtons.Left)
                   //{
                   //    //var dragImage = new Bitmap((Bitmap)picBox.Image, picBox.Size);
                   //    var dragImage = (Bitmap)CropPicture.Image;
                   //    IntPtr icon = dragImage.GetHicon();
                   //   // Cursor.Current = new Cursor(icon);
                   //   DoDragDrop(CropPicture.Image, DragDropEffects.Copy);
                   //    SystemDLL.User32.DestroyIcon(CropPicture);
                   //}

               }
               catch (Exception ex)
               {
               }
           }
           else
           {
           }
       }>

private void CropPicture_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
    dragging = true;
    dragPoint = new System.Drawing.Point(e.X, e.Y);
}
private void CropPicture_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
    if (dragging)
        CropPicture.Location = new System.Drawing.Point(CropPicture.Location.X + e.X - dragPoint.X, CropPicture.Location.Y + e.Y - dragPoint.Y);
}
private void CropPicture_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{
    dragging = false;
}

没有发生CropPicture框的鼠标事件。





现在我想在LiveImage图片框的另一个地方拖动一个CropPicture框。

None of mouse events of CropPicture box is occurred.


Now I want to drag a CropPicture box in another place of LiveImage picture box.

推荐答案

尝试以下链接： -



在WPF中拖放 [ ^ ] < br $>


拖动和WPF中的内容 - 第二部分 [ ^ ]

Try below links :-

Drag and Drop in WPF[^]

Drag and Drop in WPF - Part II[^]

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