来自泛型函数的静态方法调用

Static method call from generic function

是否可以从通用函数调用 static 方法?

我需要做这样的事情:

public static T CreateNewProject<T, V>(string token, string projectName)
     where V : IProject<T>
{
   V.LoadProject();
}

其中 LoadProject() 必须是某些 class 的某些 static 方法。

你不能用约束来做到这一点,但你可以使用 Reflection。在这种情况下,这似乎是唯一的选择:

typeof(V).GetMethod("LoadProject", BindingFlags.Static | BindingFlags.Public)
         .Invoke(null);

你可以做的是不使用静态 类 而是使用单例:

public interface ICanLoadProject
{
    void LoadProject(string token, string projectName);
}

实施:

public class SampleProjectLoader : ICanLoadProject
{
    private static SampleProjectLoader instance = new SampleProjectLoader();

    private SampleProjectLoader(){} 

    public static SampleProjectLoader Instance { get{ return instance; } }

    public void LoadProject(string token, string projectName)
    { /*Your implementation*/ }

}

那么泛型适用于:

where V : ICanLoadProject

之前访问方法的代码只需要做:

SampleProjectLoader.Instance.LoadProject("token","someName");

方法可以是:

public static class ExtensionMethods
{
    public static T CreateNewProject<T, V>(this V loader, string token, string projectName) where V : ICanLoadProject
    {
        loader.LoadProject(token, projectName);
        return default(T); //no clue what you want to return here
    }
}

并且会被称为:

static void Main(string[] args)
{
    object result = SampleProjectLoader.Instance.CreateNewProject<object, SampleProjectLoader>("token", "someName");
}

或者更好:

public static class ExtensionMethods
{
    public static T CreateNewProject<T>(this ICanLoadProject loader, string token, string projectName)
    {
        loader.LoadProject(token, projectName);
        return default(T); //no clue what you want to return here
    }
}

并调用:

SampleProjectLoader.Instance.CreateNewProject<object>("token", "someName");