最好的方法是使用pinvoke。将“mousedown”事件绑定到你想要拖动的任何控件上。
using System.Runtime.InteropServices;
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HT_CAPTION = 0x2;
[DllImportAttribute("user32.dll")]
private static extern int SendMessage(IntPtr hWnd,
int Msg, int wParam, int lParam);
[DllImportAttribute("user32.dll")]
private static extern bool ReleaseCapture();
public Form1()
{
InitializeComponent();
}
private void menuStrip1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
ReleaseCapture();
SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
}
}
这仍然需要表单获得焦点,但是您可以通过鼠标悬停来解决。虽然不太优雅,但也能实现。
private void menuStrip1_MouseHover(object sender, EventArgs e)
{
Focus();
}
更新:悬停有轻微延迟,mousemove更加响应。
private void menuStrip1_MouseMove(object sender, MouseEventArgs e)
{
if (!Focused)
{
Focus();
}
}