C# CompositionContainer.ReleaseExport方法代碼示例

        public void ReleaseParsleyAsTransientDisposesParsley()
        {
            var catalog = new TypeCatalog(typeof(Ploeh.Samples.Menu.Mef.Attributed.Lifetime.NonShared.Parsley));
            var container = new CompositionContainer(catalog);

            var x = container.GetExport<IIngredient>();
            var ingredient = x.Value;

            container.ReleaseExport(x);

            var parsley = Assert.IsAssignableFrom<Parsley>(ingredient);
            Assert.True(parsley.IsDisposed);
        }

        public void GetReleaseExport_NonSharedPart_ShouldNotRecomposeAfterRelease()
        {
            var catalog = new TypeCatalog(typeof(NonSharedPartRecomposable));
            var container = new CompositionContainer(catalog);

            // Setup dependency
            CompositionBatch batch = new CompositionBatch();
            var valueKey = batch.AddExportedValue("Value", 21);
            container.Compose(batch);
            
            var export = container.GetExport<NonSharedPartRecomposable>();
            var exportedValue = export.Value;

            Assert.AreEqual(21, exportedValue.Value);

            container.ReleaseExport(export);

            // Recompose just to ensure we don't blow up, even though we don't expect anything to happen.
            batch = new CompositionBatch();
            batch.RemovePart(valueKey);
            batch.AddExportedValue("Value", 42);
            container.Compose(batch);

            Assert.AreEqual(21, exportedValue.Value, "Value should not be recomposed after ReleaseExport is called on it.");
        }