如何清除自动完成框的值？

发布于 2024-12-22 08:30:58 字数 467 浏览 0 评论 0原文

就像 WPF 中的许多事情一样，有时最简单的事情也是最难找到示例的事情！如何清除 AutoCompleteBox 的当前文本？在我的 OnFocus 事件中，我想确保为用户提供一个清晰的输入框。所以我的事件过程看起来像

private void autGlobal_GotFocus(object sender, RoutedEventArgs e)
{
    AutoCompleteBox acb = (AutoCompleteBox)sender;
    if (acb.SearchText == "Search Term")
    {
        //clear out the box if it has the focus                    
        this.autGlobal.Text = "";
    }         
}

但是，直接设置文本属性似乎不起作用。我错过了一些明显的东西吗？

原文

Just like many things in WPF, sometimes the easiest things are the ones that are hardest to find examples for! How do you clear out the current text of an AutoCompleteBox? In my OnFocus event I want to make sure that the user is given a clear box for entry. So my event procedure looks like

private void autGlobal_GotFocus(object sender, RoutedEventArgs e)
{
    AutoCompleteBox acb = (AutoCompleteBox)sender;
    if (acb.SearchText == "Search Term")
    {
        //clear out the box if it has the focus                    
        this.autGlobal.Text = "";
    }         
}

However, setting the text property directly does not seem to work. Am I missing something obvious?

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送君千里 2024-12-29 08:30:58

您还需要重置所选项目。

private void SearchAutoCompleteBox_OnPreviewMouseDown(object sender, MouseButtonEventArgs e)
{
    SearchAutoCompleteBox.SelectedItem = null;

    SearchAutoCompleteBox.Text = string.Empty;
}

You need reset Selected Item too.

private void SearchAutoCompleteBox_OnPreviewMouseDown(object sender, MouseButtonEventArgs e)
{
    SearchAutoCompleteBox.SelectedItem = null;

    SearchAutoCompleteBox.Text = string.Empty;
}

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