EventSetter - Visual Studio设计器中的XAML错误

问题描述

我已经用XAML完成了我的TreeView，但是现在我想用代码隐藏来管理一个事件。 HierarchicalDataTemplate包含一个图像。我需要捕获图像上的MouseEnter / MouseLeave事件。我以这种方式尝试过：

 < Image x：Name =imgArticoloSource ={Binding imgArt} > 
< Image.Style> 
< Style TargetType ={x：Type Image}> 
< EventSetter Event =MouseEnterHandler =iArt_MouseEnter/> 
< / Style> 
< /Image.Style> 
< / Image> 
  

但在Visual Studio的设计器中出现错误：不可能使用EventSetter加载文件XAML 。

我如何补救？
谢谢！
Pileggi

解决方案

看起来这是一个。rel =nofollow noreferrermsgid您可以通过将 Style 与 EventSetters 一起移动到主要的资源来解决它范围，并将其包含在您的 DataTemplate 中，作为 StaticResource ：

 < Style x：Key =myImageStyleTargetType ={x：Type Image}> 
< EventSetter Event =MouseEnterHandler =iArt_MouseEnter/> 
< / Style> 
< HierarchicalDataTemplate x：Key =modTreeArtDataParts2> 
< Grid> 
< Border x：Name =bdArt> 
< Image x：Name =imgArticoloSource ={Binding imgArt}Height =Auto
 Style ={StaticResource myImageStyle}/> 
< / Border> 
< / Grid> 
< / HierarchicalDataTemplate> 
  

I've done my TreeView all with XAML but now I'd like to manage an event with code-behind. The HierarchicalDataTemplate contains an Image. I need to capture the events MouseEnter / MouseLeave on the Image. I've tried in this way:

<Image x:Name="imgArticolo" Source="{Binding imgArt}">
    <Image.Style>
        <Style TargetType="{x:Type Image}">
            <EventSetter Event="MouseEnter" Handler="iArt_MouseEnter"/>
        </Style>
    </Image.Style>
</Image>

But in the designer of Visual Studio appear the error: "Impossible to load a file XAML with EventSetter".

How can I remedy?Thank you!Pileggi

解决方案

It looks like this is a known bug. You may be able to resolve it by simply moving the Style with EventSetters to the main Resources scope and including it in your DataTemplate as a StaticResource:

<Style x:Key="myImageStyle" TargetType="{x:Type Image}">
    <EventSetter Event="MouseEnter" Handler="iArt_MouseEnter"/>
</Style>
<HierarchicalDataTemplate x:Key="modTreeArtDataParts2">
    <Grid>
        <Border x:Name="bdArt">
            <Image x:Name="imgArticolo" Source="{Binding imgArt}" Height="Auto"
                   Style="{StaticResource myImageStyle}" />
        </Border>
    </Grid>
</HierarchicalDataTemplate>

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