C#获取IEnumerable <TModel>的类型

Question

我有一个方法,我通过了IEnumerable<TModel>.然后根据类型TModel,该方法执行如下的一组指令:

    public void MyMethod<TModel>(IEnumerable<TModel> items) where TModel : class
    {
        int operationType;
        switch (typeof(TModel))
        {
            case typeof(MyModelOne):
                operationType = 1;
                break;
            case typeof(MyModelTwo):
                operationType = 2;
                break;
            case typeof(MyModelThree):
                operationType = 3;
                break;
            default:
                throw new Exception("The collection model passed to MyMethod is not recognized");
        }
        ...
    }

这不起作用,我收到错误:

没有应用程序变量或memeber'TModel'

Answer 1

您无法打开Type变量.用级联if语句替换它.

 if (typeof(TModel) == typeof(MyModelOne)) {
    operationType = 1;
 } else if (typeof(TModel) == typeof(MyModelTwo)) {
    operationType = 2;
 } // ...