Question

由于我不确定我能够准确地命名/制定一切，所以我会使用一个天真的例子。让我们来看看：

class Base<T>
{
    ...
}

/*
 * Please note the Derived is not generic, only derives from generic class
 */
class Derived : Base<SomeType>
{
    /*
     * Here, I would like to use SomeType's "generic name" (like the T in the Base), 
     * so it might look like:
     */
    Base.T field1; // This would translate to 'SomeType field1' for this particular case
    ...
}

C#语法中是否有任何方法可以访问Base.T？

我当然知道如果我们使Derived也是通用的，我们可以将其类型参数传递给Base并在{{1}中使用它}} 的

修改
请将此视为一个理论问题，在此我想确定，是否有Derived语法方式来达到用于＆＃34;模板化＆＃34;的符号类型名称。在基类中。最初的动机可能是：如果开发人员以C#取代Derived的方式修改Base<SomeType>类，他还需要在Base<OtherType>正文中的所有出现时替换它。对于这些情况，Derived与SomeType兼容，并且还有一个可用的符号名称（如Base.T），没有其他工作要做。（是的，我知道，我们有自动重构工具......只是一个问题......）

Answer 1

我认为可以解决您的问题：

class Base<T> 
{
    protected T field1;
}

/*
 * Please note the Derived is not generic, only derives from generic class
 */
class Derived : Base<string> 
{
    /*
     * Here, I would like to use SomeType's "generic name" (like the T in the Base), 
     * so it might look like:
     */
    //[not necessary]
    //Base.T field1; // This would translate to 'SomeType field1' for this particular case

    public Derived()
    {
        field1 = "hello world";
    }

}

Answer 2

class Base<T>
{
    protected T SomeField;
}

class Derived : Base<SomeType>
{
    private Type GetSomeType(bool asConstructed)
    {
        // here SomeField is SomeType because Derived is a constructed type.
        if (asConstructed)
           return SomeField.GetType(); // of course, if SomeField is null, use GetField instead

        // However, you can get the T if you really want:
        return this.GetType().BaseType.GetGenericTypeDefinition().GetGenericArguments()[0];
    }
}

访问基类中使用的泛型类型参数

2 个答案: