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我試圖實現MEF的插件框架。我有3個項目:DLL負載上的ReflectionTypeLoadException
- 主機項目(WPF)
- 接口定義項目(便攜式類庫)
- 的插件項目(便攜式類庫)
現在在主機,我嘗試加載插件彙編DLL(僅顯示應加載DLL的類):
public class SafeDirectoryCatalog : ComposablePartCatalog
{
private readonly AggregateCatalog _catalog;
public SafeDirectoryCatalog(string directory)
{
var files = Directory.GetFiles(directory, "*.dll", SearchOption.AllDirectories);
_catalog = new AggregateCatalog();
foreach (var file in files)
{
try
{
var asmCat = new AssemblyCatalog(file);
if (asmCat.Parts.ToList().Count > 0)
{
_catalog.Catalogs.Add(asmCat);
}
}
catch (ReflectionTypeLoadException)
{
}
catch (BadImageFormatException)
{
}
}
}
public override IQueryable<ComposablePartDefinition> Parts
{
get { return _catalog.Parts; }
}
}
on
var asmCat = new AssemblyCatalog(file);
我可以看到,有一個「ReflectionTypeLoadException」和零件清單上課emtpy:
Exception Screenshot (VS is German)
這是我的接口定義(輸出是在主機中引用的DLL和插件項目):
namespace HCInterfaces
{
public interface HomeControlInterface
{
string GetModuleName();
}
}
最後這個是輸出plugin.dll我的插件類:
using HCInterfaces;
using System.Composition;
namespace Plugin2
{
public partial class MainWindow
{
public MainWindow()
{
}
[Export(typeof(HomeControlInterface))]
class BMW : HomeControlInterface
{
public string GetModuleName()
{
return "hännschenklein";
}
}
}
}