C# 指定类型的CompositionBatch.AddExportedValue
我按如下方式设置容器:C# 指定类型的CompositionBatch.AddExportedValue,c#,inversion-of-control,mef,C#,Inversion Of Control,Mef,我按如下方式设置容器: .... CompositionContainer container = new CompositionContainer(catalog); CompositionBatch batch = new CompositionBatch(); batch.AddExportedValue(_dataClient); batch.AddExportedValue(_orderClient); batch.AddExportedValue(container); conta
....
CompositionContainer container = new CompositionContainer(catalog);
CompositionBatch batch = new CompositionBatch();
batch.AddExportedValue(_dataClient);
batch.AddExportedValue(_orderClient);
batch.AddExportedValue(container);
container.Compose(batch);
\u dataClient
和\u orderClient
位于不同的程序集中,我无法触摸它们。但是,它们分别实现了IDataFeed
和IOrderFeed
(但是它们的类型分别是DataClient
和OrderClient
)。稍后,我希望它们出现在构造函数中:
[ImportingConstructor]
public ShellViewModel(IShellView view, IDataFeed dataFeed, IOrderFeed orderFeed)
...
但这会引发一个importCardinalismatchException
。但是,如果我将构造函数更改为此,它将起作用:
[ImportingConstructor]
public ShellViewModel(IShellView view, DataClient dataFeed, OrderClient orderFeed)
...
我尝试了这一点,但提出了相同的例外:
...
batch.AddExportedValue(typeof(IDataFeed).FullName, _dataClient);
batch.AddExportedValue(typeof(IOrderFeed).FullName, _orderClient);
...
如何将\u dataClient
和\u orderClient
添加到容器中,就像我这样做了一样:
[Export(typeof(IDataFeed))]
public class DataClient : IDataFeed
{
...
我该怎么做?理想情况下是这样的:
batch.AddExportedValue(typeof(IDataFeed), _dataClient);
修复很容易。不知道我怎么会错过
batch.AddExportedValue((IDataFeed)_dataClient);