c# - 如何获取 com+ 应用程序的所有 com+ 组件的列表？

Question

我正在尝试使用 c# 和 ASP.NET 使用 COM+。我一直在关注一个例子，但是它的一部分失败了。

dynamic oCatalog = Activator.CreateInstance(Type.GetTypeFromProgID("ComAdmin.COMAdminCatalog"));
/* Get the Applications collection and populate it */
dynamic applicationInstances = oCatalog.GetCollection("Applications");
applicationInstances.Populate();
foreach (dynamic applicationInstance in applicationInstances)
    {
        Response.Write("<p>" + applicationInstance.Name.ToString() + "-" + applicationInstance.Key.ToString() + "</p>");
        dynamic objComponents = oCatalog.GetCollection("Components", applicationInstance.Key);
        objComponents.Populate();
        foreach(dynamic Components in objComponents)
        {
            Response.Write("<p>" + Components.Name.ToString() + "</p>");
        }           
    }

当上述调用 oCatalog.GetCollection("Components", applicationInstance.Key) 被调用时，我收到错误：

System.Reflection.TargetParameterCountException：调用 GetCollection 时出错。

如何获取应用程序实例中当前组件的列表？

Answer 1

您需要询问特定应用程序的组件的“应用程序”集合：

ICOMAdminCatalog2 oCatalog = (ICOMAdminCatalog2) Activator.CreateInstance(Type.GetTypeFromProgID("ComAdmin.COMAdminCatalog"));

ICatalogCollection applications = oCatalog.GetCollection("Applications");
applications.Populate();
foreach (ICatalogObject applicationInstance in applications)
{
    ICatalogCollection comps = applications.GetCollection("Components", applicationInstance.Key);
    comps.Populate();
    foreach (ICatalogObject comp in comps)
    {
        Console.WriteLine("{0} - {1}", comp.Name, comp.Key);
    }
}

此处查看示例：http: //msdn.microsoft.com/en-us/library/windows/desktop/ms686093 (v=vs.85).aspx