c＃在运行时创建未知的通用类型

本文介绍了c＃在运行时创建未知的通用类型的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ 所以我有一个类是一个泛型，它可能需要，在它的方法内，自己创建一个自己的实例与不同种类的通用，这种类型是通过relfection获得。So I have class that is a generic and it may need to, inside a method of it's, own create an instance of itself with a different kind of generic, which type is obtained through relfection.这很重要，因为这个Repository将T映射到一个数据库表（这是我写的ORMish），如果表示T的类有一个代表ANOTHER表的集合能够实例化并将其传递到存储库[ala Inception]。 我提供的方法，以防它更容易看到问题。This is important because this Repository maps T to a database table [it's an ORMish I am writing] and if the class that represents T has a collection representing ANOTHER table I need to be able to instance that and pass it to the repository [ala Inception].I'm providing the method in case it makes it easier to see the problem. private PropertiesAttributesAndRelatedClasses GetPropertyAndAttributesCollection() { // Returns a List of PropertyAndAttributes var type = typeof(T);//For type T return an array of PropertyInfo PropertiesAttributesAndRelatedClasses PAA = new PropertiesAttributesAndRelatedClasses();//Get our container ready PropertyAndAttributes _paa; foreach (PropertyInfo Property in type.GetProperties()) //Let's loop through all the properties. { _paa = new PropertyAndAttributes(); //Create a new instance each time. _paa.AddProperty(Property); //Adds the property and generates an internal collection of attributes for it too bool MapPropertyAndAttribute = true; if (Property.PropertyType.Namespace == "System.Collections.Generic") //This is a class we need to map to another table { PAA.AddRelatedClass(Property); //var x = Activator.CreateInstance("GenericRepository", Property.GetType().ToString()); } else { foreach (var attr in _paa.Attrs) { if (attr is IgnoreProperty) //If we find this attribute it is an override and we ignore this property. { MapPropertyAndAttribute = false; break; } } } if (MapPropertyAndAttribute) PAA.AddPaa(_paa); //Add this to the list. } return PAA; }所以给定 GenericRepository，我会这样做吗？ 需要用WORKS替换的行So givenGenericRepository, and I want to make a GenericRepository how would I do this?The line I need to replace with something that WORKS is// var x = Activator.CreateInstance("GenericRepository", Property.GetType().ToString());推荐答案我想你正在寻找 MakeGenericType 方法：I think you're looking for the MakeGenericType method:// Assuming that Property.PropertyType is something like List<T>Type elementType = Property.PropertyType.GetGenericArguments()[0];Type repositoryType = typeof(GenericRepository<>).MakeGenericType(elementType);var repository = Activator.CreateInstance(repositoryType); 这篇关于c＃在运行时创建未知的通用类型的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！