如何使用Reflection调用类型为“private async Task”的方法

Question

I have a class called PageProcessor with a method

private static async Task InsertPosts(IEnumerable<LrcPost> posts)
{
   // ...
}

and I'm trying to call it in one of my unit tests like

PageProcessor processor = new PageProcessor();
MethodInfo dynMethod = processor.GetType()
    .GetMethod
    (
        "InsertPosts",
        BindingFlags.NonPublic | BindingFlags.Instance
    );

dynMethod.Invoke(processor, new object[] { posts });

but am getting an NRE. Any idea why?

Answer 1

The method info is null when you try to access it because it is a static member and not an instance member.

Access the method as static member and not an instance member. Also because it is static an instance is not needed to invoke method.

var type = typeof(PageProcessor);
var method = type.GetMethod("InsertPosts", BindingFlags.NonPublic | BindingFlags.Static);
var task = method.Invoke(null, new object[] { posts }) as Task;