C# 拖放图片框

本文关键字：拖放 | 更新日期: 2023-09-27 18:37:07

>我有 7 个图片框，我想拖放每个图片框。我已经进行了拖放，但它带走了我拖动的原始图片框，它不会将其留在原位。这是我的代码：

        this.pbAND.MouseDown += pictureBox_MouseDown;
        pbAND.MouseMove += pictureBox_MouseMove;
        pbAND.MouseUp += pictureBox_MouseUp;

        this.pbOR.MouseDown += pictureBox_MouseDown;
        pbOR.MouseMove += pictureBox_MouseMove;
        pbOR.MouseUp += pictureBox_MouseUp;
    private void pictureBox_MouseDown(object sender, MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Left)
        {
            p = (PictureBox)sender;
            downPoint = e.Location;
            var dragImage = (Bitmap)p.Image;
            IntPtr icon = dragImage.GetHicon();
            Cursor.Current = new Cursor(icon);
            p.Parent = this;
            p.BringToFront();
            DestroyIcon(icon);
        }
    }
    private void pictureBox_MouseMove(object sender, MouseEventArgs e)
    {
        p = (PictureBox)sender;
        if (e.Button == MouseButtons.Left)
        {
            p.Left += e.X - downPoint.X;
            p.Top += e.Y - downPoint.Y;
        }
    }
    private void pictureBox_MouseUp(object sender, MouseEventArgs e)
    {
        p = (PictureBox)sender;
        Control c = GetChildAtPoint(new Point(p.Left - 1, p.Top));
        if (c == null) c = this;
        Point newLoc = c.PointToClient(p.Parent.PointToScreen(p.Location));
        p.Parent = c;
        p.Location = newLoc;
    }

C# 拖放图片框

但它带走了我拖拽的原始图片框 把它留在原地。

所以你想在掉落图片框时制作一份副本吗？

在 MouseDown（） 处理程序中，将原始位置存储在 Tag（） 属性中：

private void pictureBox_MouseDown(object sender, MouseEventArgs e)
{
    if (e.Button == MouseButtons.Left)
    {
        p = (PictureBox)sender;
        p.Tag = p.Location; // <-- store the Location in the Tag() property
        // ... rest of the existing code ...
    }
}

在 MouseUp（） 处理程序中，将一个新图片框放在当前位置并重置原始图片框：

private void pictureBox_MouseUp(object sender, MouseEventArgs e)
{
    p = (PictureBox)sender;
    // create a new PictureBox that looks like the original:
    PictureBox PB = new PictureBox();
    PB.Size = p.Size;
    PB.Image = p.Image;
    PB.SizeMode = p.SizeMode;
    PB.BorderStyle = p.BorderStyle;
    // etc...make it look the same
    // ...and place it:
    Control c = GetChildAtPoint(new Point(p.Left - 1, p.Top));
    if (c == null) c = this;
    Point newLoc = c.PointToClient(p.Parent.PointToScreen(p.Location));
    PB.Parent = c;
    PB.Location = newLoc;
    p.Parent.Controls.Add(PB); // <-- add new PB to the form!
    // put the original back where it started:
    p.Location = (Point)p.Tag;
}
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