我知道这是一个老问题,但我觉得批准的答案不是很有帮助。我从来不喜欢必须比较由框架提供的字符串的平等,因为如果它们在某个时候改变了应用程序的故障。
因此,创建了一些更复杂的系统在运行时构建自己的类型,让我在此线程中添加20美分。
甲TypeBuilderInstantiation
是ALWAYS的通用类型的表示,即由至少一种TypeBuilder
然后其他实例的Type
(RuntimeType
,TypeBuilder
和/或TypeBuilderInstantiation
)的。这意味着所讨论类型的泛型类型定义是TypeBuilder
或至少一个泛型参数是TypeBuilder
,GenericTypeParameterBuilder
或它自己的TypeBuilderInstantiation
。 (在GenericTypeParameterBuilder
情况下,如果它是由泛型类型本身声明,它不计数。)
下面是一个例子如何获得的TypeBuilderInstantiation
实例:
AssemblyName myAssemblyName = new AssemblyName("MyAssembly");
AssemblyBuilder myAssembly = AppDomain.CurrentDomain.DefineDynamicAssembly(myAssemblyName, AssemblyBuilderAccess.Run);
ModuleBuilder myModule = myAssembly.DefineDynamicModule("MyModule");
TypeBuilder myType = myModule.DefineType("MyType");
//myType (MyType) is TypeBuilder
Type collectionType = typeof(Collection<>).MakeGenericType(myType);
//collectionType (Collection<MyType>) is TypeBuilderInstantiation
TypeBuilder myGenericType = myModule.DefineType("MyGenericType");
GenericTypeParameterBuilder myGenericParam = myGenericType.DefineGenericParameters("T")[0];
//myGenericType (MyGenericType<T>) is TypeBuilder
Type genericType = myType.MakeGenericType(typeof(string));
//genericType (MyGenericType<string>) is TypeBuilderInstantiation
TypeBuilder myOtherGenericType = myModule.DefineType("MyOtherGenericType");
GenericTypeParameterBuilder myOtherGenericParam = myOtherGenericType.DefineGenericParameters("S")[0];
Type otherGenericType = myType.MakeGenericType(myOtherGenericParam);
//otherGenericType (MyGenericType<S>) is TypeBuilderInstantiation
这里有一个漂亮的小实施,检查是否类型是否为TypeBuilderInstantiation
。
public static bool IsTypeBuilderInstantiation(Type type)
{
bool isTypeBuilderInstantiation = false;
if (type.IsGenericType && !(type is TypeBuilder))
{
foreach (var genericTypeArg in type.GetGenericArguments())
{
if (isTypeBuilderInstantiation = (
genericTypeArg is TypeBuilder ||
genericTypeArg is GenericTypeParameterBuilder ||
IsTypeBuilderInstantiation(genericTypeArg)))
break;
}
isTypeBuilderInstantiation |= type.GetGenericTypeDefinition() is TypeBuilder;
}
return isTypeBuilderInstantiation;
}
你如何获得该实例?如果没有创建,TypeBuilder.GetMethods也会抛出一个异常。你想做什么? – leppie 2011-01-19 14:14:57