窗口拖动功能,以及拖动时卡的解决方案
const int WM_NCLBUTTONDOWN = 0xA1; const int HT_CAPTION = 0x2; [DllImport("user32.dll")] static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam); private void Form2_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left & this.WindowState == FormWindowState.Normal) { // 移动窗体 this.Capture = false; SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0); } } const int WM_NCLBUTTONDOWN = 0xA1; const int HT_CAPTION = 0x2; [DllImport("user32.dll")] static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam); private void Form2_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left & this.WindowState == FormWindowState.Normal) { // 移动窗体 this.Capture = false; SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0); } }
实验证明这个方法是比较好的,它模拟了点击窗口标题栏进行拖动的动作
我以前用过的方法是设置窗体的Location的方法,很卡,而且快速拖动会不同步
Point m_oldpoint; bool m_mouse_is_down = false; private void pictureBox_title_MouseDown(object sender, MouseEventArgs e) { m_oldpoint = MousePosition; } private void pictureBox_title_MouseMove(object sender, MouseEventArgs e) { if ((e.Button != MouseButtons.Left) || (MousePosition == m_oldpoint)) { return; } this.Location = new Point(this.Location.X + MousePosition.X - m_oldpoint.X, this.Location.Y + MousePosition.Y - m_oldpoint.Y); m_oldpoint = MousePosition; }