Just like this question I'm having issues invoking a method that has the "params" keyword. I keep getting TargetParameterCountException exceptions. "Parameter count mismatch". The goal is to call this method with no parameters:
IList<T> List(params Expression<Func<T, object>>[] includeProperties);
Here is what I have so far:
//Get generic type
var entityType = typeof(Applicant).Assembly.GetType(string.Format("Permet.BackEnd.ETL.Domain.Models.{0}", tableName));
//create service that will receive the generic type
var constructedIService = typeof(IService<>).MakeGenericType(entityType);
//create the argument for the method that we invoke
var paramsType = typeof(Expression<>).MakeGenericType(typeof(Func<,>).MakeGenericType(entityType, typeof(object))).MakeArrayType();
//instantiate the service using Unity (todo: fix singleton)
var serviceInstance = UnitySingleton.Container.Resolve(constructedIService, "");
//Invoke the service method "List" by passing it no parameters but telling it the signature to use (it has no overloads)
//I tried without listing the params since it has no overload but same exception
//I get exception Parameter count mismatch here
dynamic data = serviceInstance.GetType().GetMethod("List", new Type[] { paramsType }).Invoke(serviceInstance, new object[] { });
Please note that I have tried just passing null and using the overload GetMethod(string name) with exactly the same result.
尝试使用单个参数null
调用它,因为C#编译器将方法签名从method(params object[] parameters)
重写为method(object[] parameters)
以及对该方法的调用。
dynamic data = serviceInstance.GetType().GetMethod("List", new Type[] { paramsType }).Invoke(serviceInstance, new object[] { null });
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