从绑定一个DataTemplate内到视图模型 [英] Binding to viewmodel from inside a datatemplate

问题描述

我有多个视频显示，他们都与一个Mainviewmodel约束videocollection。一切正常，直到我试图绑定输入命令Mainviewmodel。我不知道这样做的语法。因为它代表设置为视频而不是Mainviewmodel绑定。

ERRORMESSAGE：

 在'对象'''视频'找不到'StartVideoCommand属性
 

XAML中：

 ＆LT; Window.Resources＆GT;
  ＆lt;局部：MainViewModel X：键=MainViewModel/＆GT;
＆LT; /Window.Resources>
  ＆LT;电网的DataContext ={StaticResource的MainViewModel}＆GT;
    ＆LT; ListBox中的ItemsSource ={结合影片}＆GT;
      ＆LT; ListBox.ItemTemplate＆GT;
        ＆LT;＆DataTemplate的GT;
          ＆LT;网格和GT;
            ＆LT; Grid.InputBindings＆GT;！ ＆LT;键绑定键=输入command ={结合StartVideo}/＆GT; ！绑定到视频不Mainviewmodel哎呀            ＆LT; /Grid.InputBindings>
             ...布局的东西
              ＆LT; TextBlock的文本={结合标题}Grid.Column =0Grid.Row =0前景=白/＆GT;
              ＆LT; TextBlock的文本={结合日期}Grid.Column =0Grid.Row =1前景=白的Horizo​​ntalAlignment =左/＆GT;
              ＆LT; TextBlock的文本={结合长度}Grid.Column =1Grid.Row =1前景=白的Horizo​​ntalAlignment =右/＆GT;
             ...关闭标签
 

解决方案

 命令={绑定的RelativeSource = {的RelativeSource AncestorType = {X：类型窗口}}，路径= DataContext.StartVideo }
 

I have multiple videos displayed they are bound with a videocollection in Mainviewmodel. Everything works fine untill I try to bind the enter command to Mainviewmodel. I Don't know the syntax for this. As it stands the binding is set to Video and not Mainviewmodel.

Errormessage:

'StartVideoCommand' property not found on 'object' ''Video'   

Xaml:

<Window.Resources>
  <local:MainViewModel x:Key="MainViewModel"/>
</Window.Resources>
  <Grid DataContext="{StaticResource MainViewModel}">
    <ListBox ItemsSource="{Binding Videos}">
      <ListBox.ItemTemplate>
        <DataTemplate>
          <Grid>
            <Grid.InputBindings>

!!!           <KeyBinding Key="Enter" Command="{Binding StartVideo}" /> !Bound to Video not to Mainviewmodel grrr  

            </Grid.InputBindings>
             ... layout stuff
              <TextBlock Text="{Binding Title}" Grid.Column="0" Grid.Row="0" Foreground="White"/>
              <TextBlock Text="{Binding Date}" Grid.Column="0" Grid.Row="1" Foreground="White" HorizontalAlignment="Left"/>
              <TextBlock Text="{Binding Length}" Grid.Column="1" Grid.Row="1" Foreground="White" HorizontalAlignment="Right"/>
             ... closing tags

解决方案

Command="{Binding RelativeSource={RelativeSource AncestorType={x:Type Window}}, Path=DataContext.StartVideo}"

这篇关于从绑定一个DataTemplate内到视图模型的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！