C#中的组合框和自动完成 [英] Combobox and autocomplete in C#

问题描述

我对组合框中的自动完成选项有一个小问题.一切正常，除了我想以不同的方式工作:)

i have small problem with autocomplete option in combobox. Everything is working correct, except that i want to work it diffrent :)

当我开始在组合框中输入时，自动建议按我喜欢的方式工作:

When I start typing in combobox, autusuggest working the way i like :

但是当我第一次打开组合框，然后开始输入时，我会得到类似的东西:

But when i first open combobox, and then start typing i get something like that:

此外，我无法从自动建议组合框中选择项目，只能从下面的列表中选择.

What's more i can't pick item from autosuggest combobox, only from this list under.

AutocompleteMode 是 SuggestAppend

AutocompleteMode is SuggestAppend

我想在第一张图片上有自动建议，在图片 2 的情况下，第一个组合框列表应该以某种方式关闭..

I'd like to have autosuggest like on the first picture, and in situations like picture 2, this first combobox list should be closed somehow..

推荐答案

我遇到了同样的问题，是这样解决的:

I had the same problem and solved it this way:

private void comboBox_DropDown(object sender, EventArgs e)
{
    ComboBox cbo = (ComboBox)sender;
    cbo.PreviewKeyDown += new PreviewKeyDownEventHandler(comboBox_PreviewKeyDown);
}

private void comboBox_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
{
    ComboBox cbo = (ComboBox)sender;
    cbo.PreviewKeyDown -= comboBox_PreviewKeyDown;
    if (cbo.DroppedDown) cbo.Focus();
}

一旦用户单击DropDown 按钮，PreviewKeyDown 事件就会附加到该ComboBox.当用户开始输入时，会触发新添加的事件.在这种情况下，我们检查 ComboBox 是否为 DroppedDown，如果是，则关注 ComboBox.在 ComboBox 焦点 DropDown 消失，就是这样.

Once the user clicks on the DropDown button PreviewKeyDown event is attached to that ComboBox. When user starts typing, freshly added event is triggered. In that event we check if ComboBox is DroppedDown, if it is, focus that ComboBox. On ComboBox focus DropDown disappeares and that's it.

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