c# - WebApi HttpPost 未从 HttpClient 接收发布的内容

Question

Web API：我也尝试在字符串 stringcontent 之前使用 [FormBody] 和 [FromForm]。

// POST api/<MAUserController>
        [HttpPost("AuthenticateUser")]
        public async Task<ActionResult<MAUser>> PostAsync(string stringcontent)
        {
            //stringcontent is null
        }

客户代码：

List<KeyValuePair<string, string>> postParameters = new List<KeyValuePair<string, string>>();
            postParameters.Add(new KeyValuePair<string, string>("Email", Email));
            postParameters.Add(new KeyValuePair<string, string>("Password", Password));
            var jsonString = JsonConvert.SerializeObject(postParameters);
            var stringContent = new StringContent(jsonString, Encoding.UTF8, "application/json");

            using (var httpClient = new HttpClient())
            {
                httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", tokenString);
                //httpClient.DefaultRequestHeaders.Add("Email", Email);
                //httpClient.DefaultRequestHeaders.Add("Password", Password);
                using (var response = await httpClient.PostAsync(API_URL, stringContent))
                {
                    if (response.IsSuccessStatusCode)
                    {
            //Success code
                    }
                    else
                    {
            //Handle unsuccessful here
                    }
                }

标签： c#jsonasp.net-coreasp.net-core-webapidotnet-httpclient

Answer 1

您正在从客户端以 JSON 格式发布结构化数据。那么为什么 API 只是试图接受一个纯字符串呢？这没有多大意义。

相反，您应该让它接受具有正确结构的模型对象。ASP.NET 将负责将 JSON 属性绑定到模型属性。但是，您还应该简化postParameters客户端中的 - 您使结构过于复杂。

例如

客户：

var postParameters  = new { Email = "[e-mail]", Password = "xyz" };

服务器：

public async Task<ActionResult<MAUser>> PostAsync([FromBody] UserCredentials credentials)
{
}

UserCredentials像这样的 DTO 类在哪里：

public class UserCredentials
{
  public string Email { get; set; }
  public string Password { get; set; }
}