面板中的Drog和Drop TableLayoutPanel？

Question

我想拖放一個tablelayout面板使用winforms/c＃的面板，拖動tablelayout工作成功，但問題是，tablelayoutpanel不會出現！ 任何解決方案，請??

private void Registration_Load(object sender, EventArgs e) 
{ 
    panel2.AllowDrop = true; 
    tableLayoutPanel1.AllowDrop = true; 
    panel2.DragEnter += panel2_DragEnter; 
    panel2.DragDrop += panel2_DragDrop; 
    tableLayoutPanel1.MouseDown += tableLayoutPanel1_MouseDown; 
} 

private void panel2_DragEnter(object sender, DragEventArgs e) 
{ 
    e.Effect = DragDropEffects.Move; 
} 

private void panel2_DragDrop(object sender, DragEventArgs e) 
{ 
    ((TableLayoutPanel)e.Data.GetData(typeof(TableLayoutPanel))).Parent (Panel)sender;     
} 
private void tableLayoutPanel1_MouseDown(object sender, MouseEventArgs e) 
{ 
    tableLayoutPanel1.DoDragDrop(tableLayoutPanel1, DragDropEffects.Move); 
} 

Answer 1

的代碼是不夠的，你需要至少設置下降TLP的位置屬性，以確保它是面板範圍內和/或位於鼠標光標。而且Z順序很重要，設置Parent屬性將其放在最下面，這樣它可以很容易地被面板中的其他控件重疊，您需要BringToFront（）。

試試這個：

private void panel2_DragEnter(object sender, DragEventArgs e) { 
     if (e.Data.GetDataPresent(typeof(TableLayoutPanel))) e.Effect = DragDropEffects.Move; 
    } 

    private void panel2_DragDrop(object sender, DragEventArgs e) { 
     var tlp = (TableLayoutPanel)e.Data.GetData(typeof(TableLayoutPanel)); 
     tlp.Location = panel2.PointToClient(new Point(e.X, e.Y)); 
     tlp.Parent = panel2; 
     tlp.BringToFront(); 
    }