如何使用 WPF MVVM 回滚组合框的选定 SelectedValue [英] How to rollback selected SelectedValue of the combo box using WPF MVVM

问题描述

我有类似的东西会弹出给用户以确认更改.如果他单击否"，我会将视图模型中的 selectedValue 设置为之前的选择.但它没有在视图中正确显示.请帮忙.

I have something like it will pop to the user for getting confirmation of changes. If he clicks no I am setting the selectedValue in view model to the previous selection. But its not getting displayed correctly in view. Please help.

推荐答案

非常简单的 .NET 4.5.1+ 解决方案:

Very simple solution for .NET 4.5.1+:

<ComboBox SelectedItem="{Binding SelectedItem, Delay=10}" ItemsSource="{Binding Items}"  />

它在所有情况下都适用于我.只需在没有赋值的情况下触发 NotifyPropertyChanged 即可回滚.

It's works for me in all cases. Just fire NotifyPropertyChanged without value assignment to rollback.

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