Asp.net Web Api 将响应状态代码设置为数字

Question

在 Asp.net Web Api 中，如何使用 int 或 string 而不是 StatusCode 枚举设置响应的状态代码？

就我而言，我想返回状态代码为 422，“不可处理的实体”的验证错误，但没有枚举器。

HttpResponseMessage response = Request.CreateResponse();
response.StatusCode = HttpStatusCode.UnprocessableEntity; //error, not in enum

Answer 1

您可以将任何 int 转换为 HttpStatusCode。

response.StatusCode = (HttpStatusCode)422;

你也可以：

HttpResponseMessage response = Request.CreateResponse((HttpStatusCode)422, "Unprocessable Entity");

Answer 2

我最终为此创建了一个类：

  public class HttpStatusCodeAdditions
    {
        public const int UnprocessableEntityCode = 422;
        public static HttpStatusCodeAdditions UnprocessableEntity = new HttpStatusCodeAdditions(UnprocessableEntityCode);

        private HttpStatusCodeAdditions(int code)
        {
            Code = code;
        }
        public int Code { get; private set; }

        public static implicit operator HttpStatusCode(HttpStatusCodeAdditions addition)
        {
            return (HttpStatusCode)addition.Code;
        }
    }

可以这样使用：

response.StatusCode = HttpStatusCodeAdditions.UnprocessableEntity;

Answer 3

将您的HttpStatusCode转换为整数：

response.StatusCode = Convert.ToInt32(HttpStatusCode.UnprocessableEntity)