C#鼠标拖动窗体代码

private Point mouseOffset; //记录鼠标指针的坐标private bool isMouseDown = false; //记录鼠标按键是否按下

/// <summary>/// 递归得到指定控件偏移量X值/// </summary>/// <param name="sender">指定的控件</param>/// <returns></returns>private int GetOffsetX(Control sender){    if (sender == this)    {        return 0;    }    if (sender.Parent != this)    {        return sender.Left + GetOffsetX(sender.Parent);    }    else    {        return 0;    }}

/// <summary>/// 递归得到指定控件偏移量Y值/// </summary>/// <param name="sender">指定的控件</param>/// <returns></returns>private int GetOffsetY(Control sender){    if (sender == this)    {        return 0;    }    if (sender.Parent != this)    {        return sender.Top + GetOffsetY(sender.Parent);    }    else    {        return 0;    }

}

/// <summary>/// MouseDown/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void FormTitle_MouseDown(object sender, MouseEventArgs e){    int xOffset;    int yOffset;    if (e.Button == MouseButtons.Left)    {        xOffset = -(e.X + GetOffsetX((Control)sender));        yOffset = -(e.Y + GetOffsetY((Control)sender));        mouseOffset = new Point(xOffset, yOffset);        isMouseDown = true;    }}

/// <summary>/// MouseMove/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void FormTitle_MouseMove(object sender, MouseEventArgs e){    if (isMouseDown)    {        Point mousePos = Control.MousePosition;        mousePos.Offset(mouseOffset.X, mouseOffset.Y);        Location = mousePos;    }}

/// <summary>/// MouseUp/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void FormTitle_MouseUp(object sender, MouseEventArgs e){    // 修改鼠标状态isMouseDown的值    // 确保只有鼠标左键按下并移动时，才移动窗体    if (e.Button == MouseButtons.Left)    {        isMouseDown = false;    }

}