CompositionHost.TryGetExport(CompositionContract, Object) 方法

定义

命名空间:

System.Composition.Hosting

程序集:

System.Composition.Hosting.dll

包:

System.Composition.Hosting v8.0.0

Source:

CompositionHost.cs

从组合上下文中检索指定的导出。

public:
 override bool TryGetExport(System::Composition::Hosting::Core::CompositionContract ^ contract, [Runtime::InteropServices::Out] System::Object ^ % export);

public override bool TryGetExport (System.Composition.Hosting.Core.CompositionContract contract, out object export);

override this.TryGetExport : System.Composition.Hosting.Core.CompositionContract * obj -> bool

Public Overrides Function TryGetExport (contract As CompositionContract, ByRef export As Object) As Boolean

参数

contract

CompositionContract

要检索的导出。

export

Object

此方法返回时，包含导出的一个实例（如果可用）；否则为 null。

返回

Boolean

如果导出已检索，则为 true；否则为 false。

例外

CompositionFailedException

导出过多。