如何显示默认文本“--选择团队--"在 WPF 页面加载的组合框中? [英] How to display default text "--Select Team --" in combo box on pageload in WPF?

问题描述

在 WPF 应用程序中，在 MVP 应用程序中，我有一个组合框，用于显示从数据库中获取的数据.在添加到Combo框的项目之前，我想显示默认文本如

In a WPF app, in MVP app, I have a combo box,for which I display the data fetched from Database. Before the items added to the Combo box, I want to display the default text such as

" -- 选择团队 --"

" -- Select Team --"

以便在页面加载时显示并选择它时应清除文本并应显示项目.

so that on pageload it displays and on selecting it the text should be cleared and the items should be displayed.

正在从数据库中选择数据.我需要显示默认文本，直到用户从组合框中选择一个项目.

Selecting data from DB is happening. I need to display the default text until the user selects an item from combo box.

请指导我

推荐答案

我发现最简单的方法是:

The easiest way I've found to do this is:

<ComboBox Name="MyComboBox"
 IsEditable="True"
 IsReadOnly="True"
 Text="-- Select Team --" />

您显然需要添加其他选项，但这可能是最简单的方法.

You'll obviously need to add your other options, but this is probably the simplest way to do it.

然而，这种方法有一个缺点，即虽然组合框中的文本不可编辑，但仍然可以选择.然而，鉴于我迄今为止发现的每种替代方案的质量都很差且很复杂，这可能是目前最好的选择.

There is however one downside to this method which is while the text inside your combo box will not be editable, it is still selectable. However, given the poor quality and complexity of every alternative I've found to date, this is probably the best option out there.

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