wpf - caliburn.micro 如何为 View 模型运行时加载和绑定(bind) View

Question

我正在构建一个需要主题支持的应用程序。所以我想提供 View 文件夹运行时间。

public class AppBootstrapper : Bootstrapper<IShell>
{
    CompositionContainer _container;

    /// <summary>
    /// By default, we are configure to use MEF
    /// </summary>
    protected override void Configure()
    {
         //view locator code get views from file and and binding it to viewmodel run time.
    }
}

Answer 1

更好的调整是使用这种方式(在 Caliburn 中实现，但不是在 Micro 中实现)。 http://caliburnmicro.codeplex.com/discussions/265502

首先，您需要定义一个属性，用于存储用于发现 View 的相关数据:

[AttributeUsage(AttributeTargets.Class, AllowMultiple = true, Inherited = false)]
public class ViewAttribute : Attribute
{
    public object Context { get; set; }

    public Type ViewType { get; private set; }

    public ViewAttribute(Type viewType)
    {
        ViewType = viewType;
    }
}

将其附加到您的 View 模型。

[View(typeof(MyView))]
public class MyViewModel : Screen

然后，您需要将 Bootstrap 中的 LocateTypeForModelType 更改为如下所示:

void Initialize()
{
    var baseLocate = ViewLocator.LocateTypeForModelType;

    ViewLocator.LocateTypeForModelType = (modelType, displayLocation, context) =>
    {
        var attribute = modelType.GetCustomAttributes(typeof(ViewAttribute), false).OfType<ViewAttribute>().Where(x => x.Context == context).FirstOrDefault();
        return attribute != null ? attribute.ViewType : baseLocate(modelType, displayLocation, context);
    };
}