通过反射的方式来执行静态类的泛型方法

今天在公司写代码的时候发生了一个问题；

 

被调用代码如下：

 

public static class CatalogComposition

    {

        private static AggregateCatalog catalogs = new AggregateCatalog();



        public static AggregateCatalog AggregateCatalog

        {

            get { return catalogs; }

        }



        public static void ComposeParts<T>(T t)

        {

            CompositionContainer compositionContainer = new CompositionContainer(AggregateCatalog);

            try

            {

                compositionContainer.ComposeParts(t);

            }

            catch (CompositionException ce)

            {

                throw new CompositionException(ce.Message, ce.InnerException);

            }

        }

    }

 

下面是没有纠正错误前的反射代码：

红色代码为错误代码。

抛出的异常为： 不能对 ContainsGenericParameters 为 True 的类型或方法执行后期绑定操作。

 

 try

            {

                if (viewModel == null)

                {

                    throw new ArgumentNullException("viewModel");

                }

                Type catalogComposition = Assembly.Load(ManifestConst.ARCHSTAR_FRAMEWORK_MEF).GetType(ManifestConst.ARCHSTAR_FRAMEWORK_MEF_CATALOGCOMPOSITION);

                MethodInfo composePartsMethod = catalogComposition.GetMethod("ComposeParts", BindingFlags.Static | BindingFlags.Public);

                composePartsMethod.Invoke(catalogComposition, new object[] { viewModel });

            }

            catch (ArgumentNullException ane)

            { }

            catch (Exception ex)

            {

                throw new Exception(ex.Message);

            }

 

下面是正确的代码：

protected void ComposeParts(V viewModel)

        {

            try

            {

                if (viewModel == null)

                {

                    throw new ArgumentNullException("viewModel");

                }

                Type catalogComposition = Assembly.Load(ManifestConst.ARCHSTAR_FRAMEWORK_MEF).GetType(ManifestConst.ARCHSTAR_FRAMEWORK_MEF_CATALOGCOMPOSITION);

                MethodInfo composePartsMethod = catalogComposition.GetMethod("ComposeParts", BindingFlags.Static | BindingFlags.Public);

                composePartsMethod.MakeGenericMethod(new Type[] { typeof(V) }).Invoke(catalogComposition, new object[] { viewModel });

            }

            catch (ArgumentNullException ane)

            { }

            catch (Exception ex)

            {

                throw new Exception(ex.Message);

            }

        }