WPF触发器结合MVVM财产

本文介绍了WPF触发器结合MVVM财产的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一个包含我想隐藏如果在一个视图模型的一个的属性值是true图像一个DataTemplate。谁能告诉我，为什么下面的XAML不起作用？

＆lt;图像X：NAME =IMG来源=.. \\影像\\ List_16.png保证金=0,0,5,0＆GT;  ＆LT; Image.Style＆GT;    ＆LT;样式和GT;      ＆LT; Style.Triggers＆GT;        ＆LT; D​​ataTrigger绑定={结合CurrentListHasPendingChanges}VALUE =真＆GT;          ＆LT; setter属性=Image.VisibilityVALUE =隐藏/＆GT;        ＆LT; / DataTrigger＆GT;        ＆LT; D​​ataTrigger绑定={结合CurrentListHasPendingChanges}VALUE =FALSE＆GT;          ＆LT; setter属性=Image.VisibilityVALUE =可见/＆GT;        ＆LT; / DataTrigger＆GT;      ＆LT; /Style.Triggers>    ＆LT; /样式和GT;  ＆LT; /Image.Style>＆LT; /图像＆GT;

解决方案

这不就是

＆LT; setter属性=能见度VALUE =隐藏/＆GT;

我假设你使用INotifyProptyChanged。

修改我做了一些谷歌搜索，我认为你需要使用某种模板，以使触发器的工作。

例如：的social.msdn.microsoft/Forums/en-US/wpf/thread/ae2dbfb7-5dd6-4352-bfa1-53634289329d

www.thejoyof$c$c/Help%5FWhy%5Fcant%5FI%5Fuse%5FDataTriggers%5Fwith%5Fcontrols%5Fin%5FWPF.aspx

I have a datatemplate containing an image that I want to be hidden if the the value of a property in a ViewModel is true. Can anyone tell me why the the xaml below does not work?

<Image x:Name="img" Source="..\Images\List_16.png" Margin="0,0,5,0"> <Image.Style> <Style> <Style.Triggers> <DataTrigger Binding="{Binding CurrentListHasPendingChanges}" Value="True"> <Setter Property="Image.Visibility" Value="Hidden" /> </DataTrigger> <DataTrigger Binding="{Binding CurrentListHasPendingChanges}" Value="False"> <Setter Property="Image.Visibility" Value="Visible" /> </DataTrigger> </Style.Triggers> </Style> </Image.Style> </Image>

解决方案

isn't that

<Setter Property="Visibility" Value="Hidden" />

?

I assume you use INotifyProptyChanged.

EDIT I did some Googling and I think you need to use some sort of template in order to make the trigger work.

eg.: social.msdn.microsoft/Forums/en-US/wpf/thread/ae2dbfb7-5dd6-4352-bfa1-53634289329d

www.thejoyofcode/Help%5FWhy%5Fcant%5FI%5Fuse%5FDataTriggers%5Fwith%5Fcontrols%5Fin%5FWPF.aspx