C# 基于类型变量创建通用对象
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Creating a generic object based on a Type variable
提问by Charlie
I need to create a generic object based on a type that is stored in a database. How can I acheive this? The code below (which won't compile) explains what I mean:
我需要基于存储在数据库中的类型创建一个通用对象。我怎样才能做到这一点？下面的代码（不会编译）解释了我的意思：
string typeString = GetTypeFromDatabase(key);
Type objectType = Type.GetType(typeString);
//This won't work, but you get the idea!
MyObject<objectType> myobject = new MyObject<objectType>();
Is it possible to do this kind of thing?
有可能做这种事情吗？
Thanks
谢谢
采纳答案by Marc Gravell
Type type = typeof(MyObject<>).MakeGenericType(objectType);
object myObject = Activator.CreateInstance(type);
Also - watch out; Type.GetType(string)only checks the executing assembly and a few system assemblies; it doesn't scan everything. If you use an assembly-qualified-name you should be fine - otherwise you may need to get the Assemblyfirst, and use someAssembly.GetType(string).
还有——当心；Type.GetType(string)只检查正在执行的程序集和一些系统程序集；它不会扫描所有内容。如果您使用程序集限定名称，您应该没问题 - 否则您可能需要获取第Assembly一个，并使用someAssembly.GetType(string).
