如何获取基类的泛型类型参数? [英] How to get base class's generic type parameter?
本文介绍了如何获取基类的泛型类型参数?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
我有三个类,如下所示:
public class TestEntity {}
public class BaseClass< ; TEntity> {}
public class DerivedClass:BaseClass< TestEntity> {}
我已经得到 System.Type
DerivedClass
的对象,在运行时使用反射。如何使用反射获取 TestEntity
的 System.Type
对象?
谢谢。
解决方案
我假设你的代码只是一个样本,而你并没有明确知道 DerivedClass
。
var type = GetSomeType();
var innerType = type.BaseType.GetGenericArguments()[0];
请注意,这段代码在运行时很容易失败,您应该验证您处理的类型是否是您期望它是:
if(type.BaseType.IsGenericType
&&& type.BaseType.GetGenericTypeDefinition )== typeof(BaseClass<>))
也可以有更深的继承树,以上条件将是必需的。
I have three class as following:
public class TestEntity { }
public class BaseClass<TEntity> { }
public class DerivedClass : BaseClass<TestEntity> { }
I already get the System.Type
object of DerivedClass
using reflection in runtime. How can I get the System.Type
object of TestEntity
using reflection?
Thanks.
解决方案
I assume that your code is just a sample and you don't explicitly know DerivedClass
.
var type = GetSomeType();
var innerType = type.BaseType.GetGenericArguments()[0];
Note that this code can fail very easily at run time you should verify if type you handle is what you expect it to be:
if(type.BaseType.IsGenericType
&& type.BaseType.GetGenericTypeDefinition() == typeof(BaseClass<>))
Also there can be deeper inheritance tree so some loop with above condition would be required.
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