.NET反射:检测IEnumerable<T>

你可以用

if(theType.IsGenericType && theType.GetGenericTypeDefinition() == typeof(IEnumerable<>))
{
    Type underlyingType = theType.GetGenericArguments()[0];
    //do something here
}

编辑:添加了IsGenericType检查,感谢您的有用评论

IEnumerable<T> 界面

Type type = typeof(ICollection<string>);

bool isEnumerable = type.GetInterfaces()       // Get all interfaces.
    .Where(i => i.IsGenericType)               // Filter to only generic.
    .Select(i => i.GetGenericTypeDefinition()) // Get their generic def.
    .Where(i => i == typeof(IEnumerable<>))    // Get those which match.
    .Count() > 0;

它将适用于任何接口,但是 如果您传入的类型为 IEnumerable<T> .

GetGenericTypeDefinition() 因此,对于非泛型类型,请首先检查 IsGenericType .

我不确定是否要检查类型是否实现泛型 IEnumerable<> IEnumerable<&燃气轮机; interfaceType 第二种情况是:

if (typeof(IEnumerable).IsAssignableFrom(type)) {
    foreach (Type interfaceType in type.GetInterfaces()) {
        if (interfaceType.IsGenericType && (interfaceType.GetGenericTypeDefinition() == typeof(IEnumerable<>))) {
            Console.WriteLine("{0} implements {1} enumerator", type.FullName, interfaceType.FullName); // is a match
        }
    }
}