WPF ComboBox更新源 [英] WPF ComboBox update source

问题描述

我有一个 ComboBox ，其中包含国家/地区代码和电话号码（+43 ..，..）
ItemsSource 属性（代码是其中之一）
ComboBox所在的 DataContext 是一个具有PhoneNumber属性的对象。

I have a ComboBox with country codes and phone numbers (+43.., ..) The ItemsSource is a list of Country objects with many properties (Code is one of them.) The DataContext in which the ComboBox is located is an object with the PhoneNumber property.

当用户在列表中选择一个国家时，我想用Country对象的'+43'值更新源PhoneNumber属性（它是一个字符串）。
出现列表，但源不会更新。怎么做？
当我用这个TextBox替换它，一切工作正常：

When user selects a country in the list, I want to update the source PhoneNumber Property(which is a string) with the '+43' value from the Country object. The list appears, but the source is never updated. How to do that? When I replace it with this TextBox, everything works fine:

<TextBox Text="{Binding Path=CountryCode, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" />

<ComboBox ItemsSource="{x:Static Member=data:Country.AllCountries}" SelectedValuePath="Country.Value.Code" SelectedValue="??" >

推荐答案

OK我自己找到了解决方案：

OK I found the solution by myself:

<ComboBox ItemsSource="{x:Static Member=data:Country.AllCountries}" SelectedValuePath="PhonePrefix" SelectedValue="{Binding Path=CountryCode, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" >

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