KeyDown事件不工作方向键，Home，End，PageUp键，PageDown键和其他在Silverlight类似钥匙 [英] KeyDown event is not working for Arrow keys, Home, End, PageUp, PageDown and other similar keys in silverlight

问题描述

我要重写列表框项目的选择行为。

I want to override the selection behavior of ListBox Items.

我们最多可以使用通过遍历ListBox中的项目和向下箭头，但我想用左遍历列表右箭头键。

We can traverse through ListBox items using Up and Down arrows but I want to traverse the list using Left and Right arrow keys.

虽然我尝试添加的键按下事件列表框，它显示除了方向键，Home，End和类似的按键几乎所有的按键。

While I am trying to add the key down event for ListBox, It shows almost all key presses except for Arrow Keys, Home, End and similar keys.

我有以下代码：

private void listArtist_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
{
    if (e.Key.ToString() == "Enter")
    {
        // Go to some page
    }
    else
    {
        MessageBox.Show(e.Key.ToString());
    }
}

我茫然不知这一点。请帮助。

I am clueless about this. Please help.

谢谢，
Subhen

Thanks, Subhen

推荐答案

你需要做的是子类ListBox和重写的onkeydown功能。也许是这样的：

What you need to do is subclass ListBox and override the OnKeyDown function. Maybe something like this:

class MyListBox : ListBox
{
    protected override void OnKeyDown(KeyEventArgs e)
    {
        switch (e.Key)
        {
        case Key.Left:
            // ....
            e.Handled = true;
            break;
        case Key.Right:
            // ....
            e.Handled = true;
            break;
        }

        if (!e.Handled)
            base.OnKeyDown(e);
    }
}

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