Question

我正在使用<代码>。工具包:

toolStripDropDownButton1.DropDownItems.Clear();

ToolStripMenuItem item1 = new ToolStripMenuItem("Item1");
toolStripDropDownButton1.DropDownItems.Add(item1);

ToolStripMenuItem item2 = new ToolStripMenuItem("Item2");
toolStripDropDownButton1.DropDownItems.Add(item2);

我愿删除Delete钥匙受压力时选定的菜单。但<代码> 工具包 <代码>KeyPress或KeyDown。

我正在使用2010年视觉演播室和4.0.NET。任何关于如何实现这一功能的建议?

Answer 1

You can use DropDown element of your menu, then bind KeyDown event to it. Now you know which key is pressed on the menu, but you don t know which menu item is pointed with mouse cursor. Bind MouseEnter event of ToolStripMenuItems and you can now store which one is pointed. Now you know which item is pointed and which key is pressed when DropDown s KeyDown event is triggered.

Answer 2

It sounds as if you want to delete the selected item from a dropdown list when you click on separate delete button. Is that what you re trying to do? If so then you need to be looking at the click event of the delete button and deleting the list item based upon the current selected item. KeyPress of KeyDown aren t needed.

Answer 3

The enclosing ToolStrip gets the key events so you can handle it there with something like:

toolStripDropDownButton1.KeyDown += (s, e) =>
{
    if (e.KeyCode == Keys.Delete)
    {
        foreach (var item in ((ToolStrip)s).Items.OfType<ToolStripMenuItem>())
        {
            if (item.Selected)
            {
                ((ToolStrip)s).Items.Remove(item);
                break;
            }
        }
    }
};

(该法典完全没有测试)

我在活动手里使用了(ToolStrip)s,如果你想在其他地方确定一种固定的方法,可以由多个不同的工具《Strip》加以使用。当然,在这种情况下,请将(ToolStrip)s改为toolStripDropDownButton1。

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