Winform窗体文本框实现拖拽获得目录或文件路径（C#）

经常会用到的东西呢。就先记录下来吧。

这代码其实可以写的更加精简。

不过既然都写出来了。就不重新修饰了。

#region AllowDrop
protected void SetAllTextBox()
{
foreach (Control txt in this.Controls)
{
if (txt is TextBox)
{
txt.AllowDrop = true;
txt.DragDrop += new DragEventHandler(txt_ObjDragDrop);
txt.DragEnter += new DragEventHandler(txt_ObjDragEnter);
}
else
{
if (txt.Controls.Count > 0)
{
SetAllTextBox(txt);
}
}
}

}

protected void SetAllTextBox(Control org)
{
foreach (Control txt in org.Controls)
{
if (txt is TextBox)
{
txt.AllowDrop = true;
txt.DragDrop += new DragEventHandler(txt_ObjDragDrop);
txt.DragEnter += new DragEventHandler(txt_ObjDragEnter);
}
else
{
if (txt.Controls.Count > 0)
{
SetAllTextBox(txt);
}
}
}
}

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

private void txt_ObjDragDrop(object sender, DragEventArgs e)
{
((TextBox)sender).Text
= ((System.Array)e.Data.GetData(DataFormats.FileDrop)).GetValue(0).ToString();
}
#endregion