数据模板 + MVVM

发布于 2024-08-17 12:07:13 字数 300 浏览 4 评论 0原文

我正在使用 MVVM，每个视图都映射到具有约定的 ViewModel。 IE MyApp.Views.MainWindowView MyApp.ViewModels.MainWindowViewModel

有没有办法删除 DataTemplate 并在 C# 中执行它？有某种循环？

<DataTemplate DataType="{x:Type vm:MainWindowViewModel}">
    <vw:MainWindowView />
</DataTemplate>

原文

I'm using MVVM and each View maps to a ViewModel with a convention. IE
MyApp.Views.MainWindowView
MyApp.ViewModels.MainWindowViewModel

Is there a way to remove the DataTemplate and do it in C#? with some sort of loop?

<DataTemplate DataType="{x:Type vm:MainWindowViewModel}">
    <vw:MainWindowView />
</DataTemplate>

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書生途 2024-08-24 12:07:13

所以基本上，您需要以编程方式创建数据模板...这不是很简单，但我认为您可以使用 FrameworkElementFactory 类来实现：

public void AddDataTemplateForView(Type viewType)
{
    string viewModelTypeName = viewType.FullName + "Model";
    Type viewModelType = Assembly.GetExecutingAssembly().GetType(viewModelTypeName);

    DataTemplate template = new DataTemplate
    {
        DataType = viewModelType,
        VisualTree = new FrameworkElementFactory(viewType)
    };

    this.Resources.Add(viewModelType, template);
}

我没有测试它，所以可能需要进行一些调整必要...例如，我不确定资源键的类型应该是什么，因为它通常是在 XAML 中设置 DataType 时隐式设置的

So basically, you need to create data templates programmatically... That's not very straightforward, but I think you can achieve that with the FrameworkElementFactory class :

public void AddDataTemplateForView(Type viewType)
{
    string viewModelTypeName = viewType.FullName + "Model";
    Type viewModelType = Assembly.GetExecutingAssembly().GetType(viewModelTypeName);

    DataTemplate template = new DataTemplate
    {
        DataType = viewModelType,
        VisualTree = new FrameworkElementFactory(viewType)
    };

    this.Resources.Add(viewModelType, template);
}

I didn't test it, so a few adjustments might be necessary... For instance I'm not sure what the type of the resource key should be, since it is usually set implicitly when you set the DataType in XAML

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葮薆情 2024-08-24 12:07:13

谢谢托马斯，使用你的代码我已经做到了这一点。

添加资源时需要使用 DataTemplateKey :D

    private void AddAllResources()
    {
        Type[] viewModelTypes = Assembly.GetAssembly(typeof(MainWindowViewModel)).GetTypes()
            .Where(t => t.Namespace == "MyApp.ViewModels" && t.Name.EndsWith("ViewModel")).ToArray();

        string viewName = null;
        string viewFullName = null;

        foreach (var vmt in viewModelTypes)
        {
            viewName = vmt.Name.Replace("ViewModel", "View");
            viewFullName = String.Format("MyApp.Views.{0}, MyApp", viewName);

            DataTemplate template = new DataTemplate
            {
                DataType = vmt,
                VisualTree = new FrameworkElementFactory(Type.GetType(viewFullName, true))
            };

            this.Resources.Add(new DataTemplateKey(vmt), template);
        }
    }

Thanks Thomas, using your code i've done this.

You need to use the DataTemplateKey when adding the resoures :D

    private void AddAllResources()
    {
        Type[] viewModelTypes = Assembly.GetAssembly(typeof(MainWindowViewModel)).GetTypes()
            .Where(t => t.Namespace == "MyApp.ViewModels" && t.Name.EndsWith("ViewModel")).ToArray();

        string viewName = null;
        string viewFullName = null;

        foreach (var vmt in viewModelTypes)
        {
            viewName = vmt.Name.Replace("ViewModel", "View");
            viewFullName = String.Format("MyApp.Views.{0}, MyApp", viewName);

            DataTemplate template = new DataTemplate
            {
                DataType = vmt,
                VisualTree = new FrameworkElementFactory(Type.GetType(viewFullName, true))
            };

            this.Resources.Add(new DataTemplateKey(vmt), template);
        }
    }

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