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如何在Form最大化而不最大化的情况下获得客户端大小?

例如,我想创建一个Bitmap与最大化Form的客户端大小相同的大小,我该怎么做?

4

2 回答 2

4

尝试

Screen.FromControl(this).GetWorkingArea();

计算大小(没有任务栏)然后减去 Forms ClientSize / Size 之间的差异。希望有效,没有测试过。

更新:

有点hacky,但我尝试了它并且它有效。

        var frm = new Form();
        frm.Opacity = 100;
        frm.WindowState = FormWindowState.Maximized;
        frm.Show();

        while (!frm.IsHandleCreated)
            System.Threading.Thread.Sleep(1);

        var result = frm.ClientSize;
        frm.Close();
        return result;

更新2:

这是一个更好的解决方案。我禁用窗体的绘制,最大化它,获取客户区,将其恢复正常并返回结果。效果很好,没有闪烁什么的。

    private static Size GetMaximizedClientSize(Form form)
    {
        var original = form.WindowState;
        try
        {
            BeginUpdate(form);

            form.WindowState = FormWindowState.Maximized;
            return form.ClientSize;

        }
        finally
        {
            form.WindowState = original;   
            EndUpdate(form);
        }
    }

    [DllImport("User32.dll")]
    private extern static int SendMessage(IntPtr hWnd, uint msg, IntPtr wParam, IntPtr lParam);

    private enum Message : int
    {
        WM_SETREDRAW = 0x000B, // int 11
    }

    /// <summary>
    /// Calls user32.dll SendMessage(handle, WM_SETREDRAW, 0, null) native function to disable painting
    /// </summary>
    /// <param name="c"></param>
    public static void BeginUpdate(Control c)
    {
        SendMessage(c.Handle, (int)Message.WM_SETREDRAW, new IntPtr(0), IntPtr.Zero);
    }

    /// <summary>
    /// Calls user32.dll SendMessage(handle, WM_SETREDRAW, 1, null) native function to enable painting
    /// </summary>
    /// <param name="c"></param>
    public static void EndUpdate(Control c)
    {
        SendMessage(c.Handle, (int)Message.WM_SETREDRAW, new IntPtr(1), IntPtr.Zero);
    }
于 2012-06-11T10:07:04.757 回答
2

试试下面的链接,

http://msdn.microsoft.com/en-us/library/system.windows.forms.screen.workingarea%28VS.71%29.aspx

于 2012-06-11T10:05:23.423 回答