如何使用HttpClient将JSON数据发布到Web API
问题描述:
我有以下代码,基本上它需要一个动态对象(在这种情况下是类型文件)并使用HTTPClient
类尝试POST到WebAPI controller
,问题我得到的是控制器总是得到NULL
为我的[FromBody]
参数上的值。如何使用HttpClient将JSON数据发布到Web API
var obj = new
{
f = new File
{
Description = description,
File64 = Convert.ToBase64String(fileContent),
FileName = fileName,
VersionName = versionName,
MimeType = mimeType
},
}
var client = new HttpClient(signingHandler)
{
BaseAddress = new Uri(baseURL + path) //In this case v1/document/checkin/12345
};
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
HttpResponseMessage response;
action = Uri.EscapeUriString(action);
//Obj is passed into this, currently it is of type File
var content = new StringContent(JsonConvert.SerializeObject(obj).ToString(),
Encoding.UTF8, "application/json");
response = client.PostAsync(action, content)).Result;
if (response.IsSuccessStatusCode)
{
var responseContent = response.Content;
string responseString = responseContent.ReadAsStringAsync().Result;
return JsonConvert.DeserializeObject<T>(responseString);
}
控制器
[HttpPost]
[Route("v1/document/checkin/{id:int}")]
public void Checkin_V1(int id, [FromBody] File f)
{
//DO STUFF - f has null on all of its properties
}
模型
public class File
{
public string FileName { get; set; }
public string VersionName { get; set; }
public string Description { get; set; }
public string MimeType { get; set; }
public byte[] Bytes { get; set;}
public string File64 { get; set; }
}
该模型是在WebAPI
和客户端应用程序两者共享。
任何帮助,为什么这是失败的,将不胜感激,一直在绕圈子一段时间了。
答
您的obj在开始时不需要。这是将f嵌套在另一个对象内部。
var obj = new
{
f = new File
{
Description = description,
File64 = Convert.ToBase64String(fileContent),
FileName = fileName,
VersionName = versionName,
MimeType = mimeType
},
}
更改为
var f = new File
{
Description = description,
File64 = Convert.ToBase64String(fileContent),
FileName = fileName,
VersionName = versionName,
MimeType = mimeType
};
然后,只需序列F。
答
我觉得这是对你的代码
var obj = new
{
f = new File
{
Description = description,
File64 = Convert.ToBase64String(fileContent),
FileName = fileName,
VersionName = versionName,
MimeType = mimeType
},
}
由于此,这部分问题将被从你真正需要什么不同的序列化。 试试这个,而不是
var obj = new File
{
Description = description,
File64 = Convert.ToBase64String(fileContent),
FileName = fileName,
VersionName = versionName,
MimeType = mimeType
}
工程就像一个魅力,谢谢。 –