Question

我有一个类类型的字典，如下所示：

    private static Dictionary<int, Type> GetArrayOfClassInstances()
    {
        var availability = new LeisureLinkBaseProduct.Availability();
        var baseRate = new LeisureLinkBaseProduct.BaseRate();
        var stayRestrictions = new LeisureLinkBaseProduct.StayRestrictions();
        var checkInInformation = new LeisureLinkBaseProduct.CheckInInformation();
        var specials = new LeisureLinkBaseProduct.Specials();
        var taxes = new LeisureLinkBaseProduct.Taxes();
        var fees = new LeisureLinkBaseProduct.Fees();

        var classDictionary = new Dictionary<int, Type>();
        classDictionary.Add(1, availability.GetType());
        classDictionary.Add(2, baseRate.GetType());
        classDictionary.Add(3, stayRestrictions.GetType());
        classDictionary.Add(4, checkInInformation.GetType());
        classDictionary.Add(5, specials.GetType());
        classDictionary.Add(6, taxes.GetType());
        classDictionary.Add(7, fees.GetType());

        return classDictionary;
    }

我想把它传递给这个看起来像这样的通用方法：

                var classes = GetArrayOfClassInstances();

                foreach (var instance in classes)
                {
                    var request = RequestBuilder.BuildAdditionalDataRequest(link.href);
                    var response = Api<instance.value>(request.Endpoint);
                }

但是我得到了intellisense错误“实例是一个变量但是像一个类型一样使用”我如何将这个类类型传递给泛型呢？这可能吗？谢谢！

Answer 1

您需要反射，因为在编译时不知道类型：

typeof(Api<>).MakeGenericType(instance.value)
    .GetConstructor(new[] {typeof(Endpoint)})
    .Invoke(new[]{request.Endpoint});

Answer 2

以下内容针对我而且基于this post：

Api类：

public class Api<T>
{
    public Api(Type E){}
}

创建Api方法：

    private static void CreateApis()
    {
        var classes = GetArrayOfClassInstances();


        foreach (KeyValuePair<int, Type> instance in classes)
        {
            Type apiType = typeof(Api<>).MakeGenericType(instance.Value);

            var api = Activator.CreateInstance(apiType, new[]{typeof(System.Net.EndPoint)});
        }
    }

C＃将类类型的字典传递给泛型

2 个答案: