将表单大小限制为水平

Question

可能重复:
在C#中形成垂直(仅)可调整大小的窗口

我有一个案例,我需要允许用户只是水平调整窗体大小.表单的最大宽度是x.我怎样才能做到这一点？

Answer 1

将MaximumSize和MinimumSize设置为相同的高度,但可变宽度.

为此,调整大小光标不会出现在顶部或底部:

protected override void WndProc(ref Message m) {
    base.WndProc(ref m);
    switch (m.Msg) {
        case 0x84: //WM_NCHITTEST
            var result = (HitTest)m.Result.ToInt32();
            if (result == HitTest.Top || result == HitTest.Bottom)
                m.Result = new IntPtr((int)HitTest.Caption);
            if (result == HitTest.TopLeft || result == HitTest.BottomLeft)
                m.Result = new IntPtr((int)HitTest.Left);
            if (result == HitTest.TopRight || result == HitTest.BottomRight)
                m.Result = new IntPtr((int)HitTest.Right);

            break;
    }
}
enum HitTest {
    Caption = 2,
    Transparent = -1,
    Nowhere = 0,
    Client = 1,
    Left = 10,
    Right = 11,
    Top = 12,
    TopLeft = 13,
    TopRight = 14,
    Bottom = 15,
    BottomLeft = 16,
    BottomRight = 17,
    Border = 18
}

复制和修改代码:在C#中垂直(仅)可调整大小的窗体