Asp.net Web API 返回Json对象的两种方式

这两种方式都是以HttpResponseMessage的形式返回，

方式一：以字符串的形式

var content = new StringContent("{\"FileName\": \"" + fileName + "\"}");HttpResponseMessage response = new HttpResponseMessage(){Content = content};response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");

方式二：以对象（这里用的是字典）的方式

var fileNames = new Dictionary<string, string>();

fileNames.Add("FileName", fileName);

var content = new ObjectContent<Dictionary<string, string>>(fileNames, new JsonMediaTypeFormatter(), "application/json");

HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.OK, content);