如何将 PostAsJsonAsync 用作通用函数？

Question

我需要编写一个可重复用于任何 class 对象的辅助方法。简而言之，我需要使 PostAsJsonAsync 方法通用。现在是这样的：

public HttpResponseMessage POSTRequest(StudentViewModel student)
{
    using (var client = new System.Net.Http.HttpClient())
    {
        client.BaseAddress = new Uri(_BaseAddress);

        var postTask = client.PostAsJsonAsync<StudentViewModel>("student", student);
        postTask.Wait();

        var result = postTask.Result;

        return result;
    }
}

如果我像上面那样使用它，我需要为其他视图模型对象的每个请求编写它。我怎样才能重写它，使其充当所有 POST 请求的通用方法？

Answer 1

你可以这样试试。首选使用 async await

async Task<HttpResponseMessage> 
                  PostGenericMessage<T>(string apiEndpoint, T typeofYourClass) where T : class
{

    using (var client = new HttpClient())
    {
        client.BaseAddress = new Uri("uri");

        var postTask = client.PostAsJsonAsync(apiEndpoint, typeofYourClass);
        return await postTask;
    }

}

Answer 2

你应该可以这样做：

public HttpResponseMessage PostRequest<T>(T value)
{
    using (var client = new System.Net.Http.HttpClient())
    {
        client.BaseAddress = new Uri(_BaseAddress);

        var postTask = client.PostAsJsonAsync<T>("student", value);
        var result = postTask.Result; // Task.Result waits for the result: https://docs.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1.result?view=netframework-4.8
        return result;
    }
}

或像这样的异步：

public async HttpResponseMessage PostRequestAsync<T>(T value)
{
    using (var client = new System.Net.Http.HttpClient())
    {
        client.BaseAddress = new Uri(_BaseAddress);
        return await client.PostAsJsonAsync<T>("student", value);
    }
}

我没有在 PostAsJsonAsync 上看到任何类型限制，所以没有 where T : class

应该没问题

如何将 PostAsJsonAsync 用作通用函数？

How to use PostAsJsonAsync as a generic function?

c#

httprequest