如何解决“..dictionary entry must have associated key”错误？

Question

我已经在我的 App.xaml 文件中添加了一个名称空间，以便解析我在 project.Then 中的 ViewModelLocator.cs 位置并引用 ResourceDictionary 中的 ns。但是当我添加这些时我得到了两个错误：

..Each dictionary entry must have an associated key.

'ViewModelLocator' does not exist in XML namespace 'clr-namespace:MongoDBApp.ViewModels;assembly=MongoDBApp'

我首先检查了命名空间对于 ViewModelLocator 的位置是否正确，即：namespace MongoDBApp.ViewModels.

我还检查了 ResourceDictionary 中引用的语法，这似乎是正确的。这个 solution 没有解决错误，我已经清理并重建了几次解决方案。

任何人都可以建议如何解决此错误？

App.xml文件的定义如下，ResourceDictionary在文件底部附近：

<Application x:Class="MongoDBApp.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:converters="clr-namespace:MongoDBApp.Converters"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:d1p1="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:local="clr-namespace:MongoDBApp.ViewModels;assembly=MongoDBApp"
             xmlns:validators="clr-namespace:MongoDBApp.Validator"
             StartupUri="pack://application:,,,/Views/MainView.xaml"
             d1p1:Ignorable="d">
    <Application.Resources>
        <Style TargetType="{x:Type TextBox}">
            <Setter Property="Validation.ErrorTemplate">
                <Setter.Value>
                    <ControlTemplate>
                        <DockPanel>
                            <Grid Width="16"
                                  Height="16"
                                  Margin="3 0 0 0"
                                  VerticalAlignment="Center"
                                  DockPanel.Dock="Right">
                                <Ellipse Width="16"
                                         Height="16"
                                         Fill="Red" />
                                <Ellipse Width="3"
                                         Height="8"
                                         Margin="0 2 0 0"
                                         HorizontalAlignment="Center"
                                         VerticalAlignment="Top"
                                         Fill="White" />
                                <Ellipse Width="2"
                                         Height="2"
                                         Margin="0 0 0 2"
                                         HorizontalAlignment="Center"
                                         VerticalAlignment="Bottom"
                                         Fill="White" />
                            </Grid>
                            <Border BorderBrush="Red"
                                    BorderThickness="2"
                                    CornerRadius="2">
                                <AdornedElementPlaceholder />
                            </Border>
                        </DockPanel>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
            <Style.Triggers>
                <Trigger Property="Validation.HasError" Value="true">
                    <Setter Property="ToolTip" Value="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=(Validation.Errors)[0].ErrorContent}" />
                </Trigger>
            </Style.Triggers>
        </Style>
        <ResourceDictionary>
            <local:ViewModelLocator x:Key="mainViewModelLocator" ></local:ViewModelLocator>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Colors.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/Brown.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/Brown.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>     
    </Application.Resources>
</Application>

Answer 1

类似这样的东西应该可以工作，请注意我的 ViewModelLocator 在这种情况下来自 prism（这就是为什么我需要 IView，如果你使用其他东西则不需要）。

基地class

public class MyFormUserControl : UserControl, IView
{
    public MyFormUserControl()
    {
        if (!DesignerProperties.GetIsInDesignMode(this))
        {
            SetValue(ViewModelLocator.AutoWireViewModelProperty, true);
        }
    }
 }

用户控件

<controls:MyFormUserControl  x:Class="MyWpf1.UserControl1"
                         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                         xmlns:controls="path to the base class">

your usual xaml goes here

</controls:MyFormUserControl>

代码隐藏

public partial class UserControl1: MyFormUserControl
{
    public CrateFormView() : base()
    {
        InitializeComponent();
    }
}

如何解决“..dictionary entry must have associated key”错误？

How to resolve "..dictionary entry must have associated key" error?

wpf

resourcedictionary

app.xaml

c#-4.0

viewmodellocator