vb.net – 覆盖DataGridView Shift Space

发布时间：2020-12-17 07:27:30 所属栏目：百科来源：网络整理

导读：在DataGridView中,按SHIFT和SPACE将默认选择整行.我发现的唯一解决方案(在 vb.net DataGridView – Replace Shortcut Key with typed character处引用)是关闭行选择功能.虽然这有效,但它并不理想,因为我仍然希望能够使用行选择器选择整行(例如,删除行),并通

在DataGridView中,按SHIFT和SPACE将默认选择整行.我发现的唯一解决方案(在 vb.net DataGridView – Replace Shortcut Key with typed character处引用)是关闭行选择功能.虽然这有效,但它并不理想,因为我仍然希望能够使用行选择器选择整行(例如,删除行),并通过将SelectionMode属性更改为除RowHeaderSelect以外的任何内容而失去该能力.有没有办法只捕获SHIFT SPACE组合并用简单的SPACE替换它？似乎没有任何关键事件甚至在控件的MutiSelect属性设置为True并且SelectionMode属性设置为RowHeaderSelect时识别出击键,因此我无法使用它们.

ETA：我想可能会关闭MultiSelect并将选择模式更改为CellSelect,然后为RowHeaderMouseClick事件添加事件处理程序将起作用… nope.

解决方法

我想出如何实现这一点的最好方法是从DataGridView继承并重写ProcessCmdKey方法.然后你可以拦截Shift Space并发送Space.只需将此类添加到项目中,并将所有DataGridViews切换到MyDataGridViews.我的解决方案从这个 DataGridView keydown event not working in C# SO问题(这也解释了为什么Zaggler的解决方案不起作用)和 SendKeys in ProcessCmdKey: change Shift-Space to just a Space Bytes.com帖子中汲取灵感.对不起,但它在C#中.

class MyDataGridView : System.Windows.Forms.DataGridView
{
    protected override bool ProcessCmdKey(ref System.Windows.Forms.Message msg,System.Windows.Forms.Keys keyData)
    {
        if (keyData == (System.Windows.Forms.Keys.Space | System.Windows.Forms.Keys.Shift))
        {
            // DataGridView is dumb and will select a row when the user types Shift+Space 
            // if you have the DGV set so that you can click a row header to select a row (for example,to delete the row)
            // this method will intercept Shift+Space and just send on Space so that the DGV properly handles this. 
            // For example,if I type "ME TYPING IN ALL CAPS" it ends up looking like "METYPINGINALLCAPS".
            // Or if I type "Note: I have some OS thing to talk about" it looks like "Note:Ihave some OSthing to talk about"

            byte[] keyStates = new byte[255];
            UnsafeNativeMethods.GetKeyboardState(keyStates);
            byte shiftKeyState = keyStates[16];
            keyStates[16] = 0; // turn off the shift key
            UnsafeNativeMethods.SetKeyboardState(keyStates);

            System.Windows.Forms.SendKeys.SendWait(" ");

            keyStates[16] = shiftKeyState; // turn the shift key back on
            UnsafeNativeMethods.SetKeyboardState(keyStates);
            return true;
        }
        return base.ProcessCmdKey(ref msg,keyData);
    }

    [System.Security.SuppressUnmanagedCodeSecurity]
    internal static class UnsafeNativeMethods
    {

        [System.Runtime.InteropServices.DllImport("user32.dll",CharSet = System.Runtime.InteropServices.CharSet.Auto)]
        public static extern int GetKeyboardState(byte[] keystate);


        [System.Runtime.InteropServices.DllImport("user32.dll",CharSet = System.Runtime.InteropServices.CharSet.Auto)]
        public static extern int SetKeyboardState(byte[] keystate);
    }
}

（编辑：李大同）

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