Question

开发需要调用Json REST Api的.NET Core Web应用程序。

来电者：

        using (HttpClient client = new HttpClient())
        {
            client.DefaultRequestHeaders.Accept.Clear();
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

            AuthorizationUser user = new AuthorizationUser { User = "<user>", Application = "<app>" };

            var content = new StringContent(JsonConvert.SerializeObject(user), Encoding.UTF8, "application/json");
            HttpResponseMessage response = await client.PostAsync(new Uri("http://localhost:8081/Roles"), content);
            // ...
        }

被叫方：

    [AllowAnonymous]
    [HttpPost]
    public HttpResponseMessage Post(AuthorizationUser user)
    {
        try
        {
            user = FillRoles(user);
            return Request.CreateResponse(HttpStatusCode.OK, user);
        }
        catch (System.Exception ex)
        {
            return Request.CreateErrorResponse(HttpStatusCode.InternalServerError, ex);
        }
    }

模型（在来电者和被叫者中）：

public class AuthorizationUser
{

    public AuthorizationUser() // Added thanks to CodeFuller
    { }

    public AuthorizationUser(string user, string application)
    {
        User = user ?? throw new ArgumentNullException(nameof(user));
        Application = application ?? throw new ArgumentNullException(nameof(application));

    }
    public string User { get; set; }
    public string Application { get; set; }
    public IEnumerable<string> Roles { get; set; }
}

当到达被叫方的断点时，收到的user始终为空。我尝试在其前添加[FromBody]和[FromUri]，但结果相同。

我做错了什么？

Answer 1

我无法重现您的问题，使用User和Application字段正确填充用户。

似乎在模型绑定期间发生了一些错误。要诊断问题，请检查以下内容：

ActionContext.ModelState.IsValid方法中Post()的价值是多少？是true还是false？
如果为false，请在调试器中检查集合ActionContext.ModelState.Values。它应该包含模型绑定错误。

没有得到HttpClient.PostAsync（）的结果

1 个答案: