C＃如何使用泛型类的泛型方法参数

So I have the following code:

所以我有以下代码：

public Dictionary<int, Class1<Class2>> someDictionary;

public T DoThings<T, U>(int id) where T : Class1<U>, new() where U : Class2, new()
{
    T something = null;
    if (!someDictionary.ContainsKey(id))
    {
        something = new T();
        someDictionary.Add(id, something);
    }
    return something;
}

And I am getting this error while trying to add to someDictionary:

我在尝试添加到someDictionary时收到此错误：

Argument 2: Cannot convert from 'T' to 'Class1 < Class2 >'

参数2：无法从'T'转换为'Class1 '

Any help as to how to solve this, if it even can be solved would be greatly appriciated, thanks.

关于如何解决这个问题的任何帮助，如果它甚至可以解决，将会非常感激，谢谢。

Luke.

卢克。

1 个解决方案

#1

You should declare the generic class.

您应该声明泛型类。

public class ShouldOneClass<T,U> where T : Class1<U>, new() 
                                 where U : Class2, new()
{
    public Dictionary<int, T> someDictionary;
}

But if you don't want use generic class , replace generics type with interface.

但是如果您不想使用泛型类，请将泛型类型替换为接口。

#1