处理 WebApi 错误 HttpResponseMessage 客户端

Question

当出现 ModelState 错误时，我在处理来自 webapi 的 http 错误响应时遇到问题，即“ModelState”不是集合而是属性，因此我无法遍历它们。

我正在努力寻找有关其他人如何处理此问题的任何信息，这一定是一个常见的用例？

控制器

if (!ModelState.IsValid)
            return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);

生成的 JSON

{  
    "readyState":4,
    "responseText":"{\"Message\":\"The request is invalid.\",\"ModelState\":{\"model.Property1\":[\"'Property1' should not be empty.\"],\"model.Property2\":[\"'Property2' should not be empty.\"],\"model.Property3\":[\"'Property3' should not be empty.\"]}}",
    "responseJSON":{  
      "Message":"The request is invalid.",
      "ModelState":{  
         "model.Property1":[  
            "'Property1' should not be empty."
         ],
         "model.Property2":[  
            "'Property2' should not be empty."
         ],
         "model.Property3":[  
            "'Property3' should not be empty."
         ]
      }
    },
    "status":400,
    "statusText":"Bad Request"
}

Answer 1

就我而言，我正在使用

HttpResponseMessage response = null;
if (!ModelState.IsValid)
            {
                response = request.CreateResponse(HttpStatusCode.BadRequest,
                    ModelState.Keys.SelectMany(k => ModelState[k].Errors)
                          .Select(m => m.ErrorMessage).ToArray());
            }

然后返回响应