你可以使用保湿MEF的静态属性？ [英] Can you hydrate a static property using MEF?

问题描述

我可以滋润这个类的静态构造函数里？

 公共类连接：IDTExtensibility2的，IDTCommandTarget
  静态连接（）
    {
        //水合物的静态属性？
    }
    [进口]
    公共静态动作＆LT; ProjectLogicChecks＆GT;显示{获得;组; }

[导出（typeof运算（动作＆LT; ProjectLogicChecks＆GT;））]
    私有静态无效DisplayResults（CheckProcesses _checkResults）
{
    的MessageBox.show（_checkResults.ProjectLogicCheck.AssemblyName +有问题=+
                    _checkResults.ProjectLogicCheck.HasProblems）;
}
 

解决方案

这是比我想象的要容易得多。

 静态连接（）
    {
        VAR批=新CompositionBatch（）;
        CompositionContainer中容器;
        VAR reflectionCatalog =新AssemblyCatalog（System.Reflection.Assembly.GetExecutingAssembly（））;

        VAR extensionPath = System.IO.Path.Combine（Environment.CurrentDirectory，扩展）;
        如果（System.IO.Directory.Exists（extensionPath））
        {
            VAR directoryCatalog =新DirectoryCatalog（extensionPath）;
            VAR defaultCatalogEp =新CatalogExportProvider（reflectionCatalog）;
            集装箱=新CompositionContainer中（directoryCatalog，defaultCatalogEp）;
            defaultCatalogEp.SourceProvider =容器;
        }
        其他
            集装箱=新CompositionContainer中（reflectionCatalog）;

        container.Compose（批）;
 //设置一个静态属性
        显示= container.GetExportedValue＆lt;作用＆LT; IEnumerable的＆LT; ProjectLogicChecks＆GT;＆GT;＆GT;（）;
    }
 

变更类型为动作＆LT; IEnumerable的＆LT; ProjectLogicChecks＆GT;＆GT; 这样我就可以显示结果为多个项目和整体解决方案，而不是只是一个

我跟着<一个href="http://blogs.microsoft.co.il/blogs/bnaya/archive/2009/12/05/mef-for-beginner-part-2-vs-2010.aspx"相对=nofollow>这个文章，以获取静态属性集，那么<一个href="http://$c$cbetter.com/blogs/glenn.block/archive/2009/05/14/customizing-container-behavior-part-2-of-n-defaults.aspx"相对=nofollow>这个，以提供本地默认的情况下，有没有扩展present。

can I hydrate this inside the class's static constructor?

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);
}

解决方案

It was easier than I thought it would be.

 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>>>( );
    }

Changed the type to Action<IEnumerable<ProjectLogicChecks>> so that I could display results for multiple projects or a whole solution instead of just the one.

I followed this article to get the static property set, then this to provide local defaults in case there is no extension present.

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