“找不到名称为{Locator}的资源"；使用mvvm-light用户控件时出错 [英] "Resource with the name {Locator} cannot be found" Error when using mvvm-light user control

问题描述

我正在使用mvvm light工具包来创建WPF应用程序.我创建了一个用户控件和一个对应的ViewModel.我在ViewModelLocator中创建了一个ViewModel属性.我将用户控件datacontext绑定到Locator类中的属性.当我在Blend或VS Designer中编辑用户控件时，一切似乎都可以正常工作，因为我可以看到我的设计时间数据.

i am using the mvvm light toolkit to create a WPF application. I created a user control and a corresponding ViewModel. I created a ViewModel property in the ViewModelLocator. I bound the user controls datacontext to the property in the Locator class. When i edit the User Control in Blend or the VS Designer everything seems to work, since i can see my design time data.

当我现在尝试在由工具箱的wpf模板创建的主窗口上使用我的用户控件时，我收到错误消息找不到名称为{Locator}的资源"，并且出现了我的用户控件所在的行在Blend中，在mainwindow.xaml中用红线标记.在Visual Studio中，同一行标记有错误:无法创建MyView类型的实例".

When i now try to use my user control on the main window, which is created by the wpf template of the toolkit i receive the error "Resource with the name {Locator} cannot be found" and the row with my user control in the mainwindow.xaml is marked with a red line in Blend. In Visual Studio the same line is marked with the error: "Cannot create an instance of type MyView".

这是app.xaml的源代码

This is the source code of the app.xaml

<Application.Resources>
    <!--Global View Model Locator-->
    <vm:ViewModelLocator x:Key="Locator"
                         d:IsDataSource="True">
</Application.Resources>

这是EditCustomerView.xaml的代码

This is the code of the EditCustomerView.xaml

<UserControl.DataContext>
    <Binding Path="EditCustomer" Source="{StaticResource Locator}" />
</UserControl.DataContext>

这是我主窗口中的代码

This is the code in my main Window

<Window.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="Skins/MainSkin.xaml" />
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
</Window.Resources>

<Window.DataContext>
    <Binding Path="Main" Source="{StaticResource Locator}"/>
</Window.DataContext>

<Grid x:Name="LayoutRoot" Background="{DynamicResource BasicBackground}">
    <Grid.RowDefinitions>
        <RowDefinition Height="0.927*"/>
        <RowDefinition Height="0.073*"/>
    </Grid.RowDefinitions>
    <ListBox Margin="4" SelectedItem="{Binding Main.SelectedCustomer, Mode=Default, Source={StaticResource Locator}}" ItemTemplate="{DynamicResource CustomerTemplate}" ItemsSource="{Binding Customers, Mode=Default}"/>
    <Button HorizontalAlignment="Center" VerticalAlignment="Center" Width="75" Content="Edit" Grid.Row="1" Command="{Binding EditCustomerCommand, Mode=Default}"/>
    <Border x:Name="border" Opacity="0.75" Grid.RowSpan="2" Background="#FF706F6F" BorderBrush="Black" BorderThickness="1" Visibility="{Binding EditViewVisibility, Mode=Default}">
        <views:EditCustomerView HorizontalAlignment="Center" VerticalAlignment="Center"/>
    </Border>
</Grid>

应用程序编译并运行.该错误仅在设计时发生.

The application compiles and runs. The error is only occuring during design time.

你能告诉我我在做什么错吗?

Can you tell me what i am doing wrong?

谢谢.

推荐答案

这是一个已知问题.由于某种原因，Blend无法识别静态全局资源.

This is a known issue. Blend for some reason doesn't recognize the static global resource.

作为解决方法，您可以在视图中创建ViewModelLocator的本地资源.

As a workaround you can create a local resource of ViewModelLocator in your Views.

<Window.Resources>
    <vm:ViewModelLocator x:Key="Locator" 
                         d:IsDataSource="True"> 
</Window.Resources>

您必须包含ViewModel命名空间.

You have to include the ViewModel namespace.

此问题在Codeplex中报告了

，并在此处stackoverflow

似乎在Blend 4中已解决

Seems it is resolved in Blend 4

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