绑定WPF按钮CommandParameter到按钮本身的DataTemplate [英] Binding a WPF Button CommandParameter to the Button itself in DataTemplate

问题描述

我有一个DataTemplate的重新presents我通过自定义AppBarCommand对象的集合。

宣布AppBar按钮

 公共AppBarCommand（RelayCommand命令字符串的ButtonStyle）
  {
     命令=命令;
     的ButtonStyle =的ButtonStyle;
  }＆LT;＆DataTemplate的GT;
   ＆LT;按钮命令={绑定命令}
           风格={结合的ButtonStyle，转换器= {StaticResource的StringNameToStyleConverter}}/＆GT;
＆LT; / DataTemplate中＆GT;
 

我想补充一个CommandParameter约束力，但该参数必须是按钮本身。这是这样我就可以设置一个木卫四弹出的PlacementTarget。这可能吗？

解决方案

 ＆LT;按钮命令={绑定命令}
        CommandParameter ={绑定的RelativeSource = {自我的RelativeSource}}/＆GT;
 

您Command属性应该是 RelayCommand 通用版： RelayCommand＆LT;对象＆gt; 例如

I have a DataTemplate that represents AppBar buttons that I declare through a collection of custom AppBarCommand objects.

  public AppBarCommand(RelayCommand command, string buttonstyle)
  {
     Command = command;
     ButtonStyle = buttonstyle;
  }

<DataTemplate>
   <Button Command="{Binding Command}"
           Style="{Binding ButtonStyle, Converter={StaticResource StringNameToStyleConverter}}"/>
</DataTemplate>

I would like to add a CommandParameter binding, but the parameter has to be the Button itself. This is so I can set the PlacementTarget of a Callisto flyout. Is this possible?

解决方案

<Button Command="{Binding Command}" 
        CommandParameter="{Binding RelativeSource={RelativeSource Self}}" />

Your Command property should be the generic version of the RelayCommand: RelayCommand<object> for instance.

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