你能用MEF水合静电吗？

Question

我可以在类的静态构造函数中加水吗？

public class Connect:IDTExtensibility2, IDTCommandTarget
  static Connect()
    {
        //hydrate static properties?
    }
    [Import]
    public static Action<ProjectLogicChecks> Display { get; set; }

[Export(typeof(Action<ProjectLogicChecks>))]
    private static void DisplayResults( CheckProcesses _checkResults)
{
    MessageBox.Show(_checkResults.ProjectLogicCheck.AssemblyName + " has problems=" +
                    _checkResults.ProjectLogicCheck.HasProblems);
}

Answer 1

不,MEF不支持静态导入.

Answer 2

这比我想象的要容易。

 static Connect()
    {
        var batch = new CompositionBatch( );
        CompositionContainer container;
        var reflectionCatalog = new AssemblyCatalog(System.Reflection.Assembly.GetExecutingAssembly( ));

        var extensionPath = System.IO.Path.Combine(Environment.CurrentDirectory, "extensions");
        if (System.IO.Directory.Exists(extensionPath))
        {
            var directoryCatalog = new DirectoryCatalog(extensionPath);
            var defaultCatalogEp = new CatalogExportProvider(reflectionCatalog);
            container=new CompositionContainer(directoryCatalog, defaultCatalogEp);
            defaultCatalogEp.SourceProvider=container;
        }
        else
            container = new CompositionContainer(reflectionCatalog);

        container.Compose(batch);
 //Setting a static property
        Display=container.GetExportedValue<Action<IEnumerable< ProjectLogicChecks>>>( );
    }

将类型更改为，Action<IEnumerable<ProjectLogicChecks>>以便我可以显示多个项目或整个解决方案的结果，而不仅仅是一个。

我按照这篇文章获取静态属性集，然后在没有扩展名的情况下提供本地默认值。