我已成功从我的 WebAPI 项目(“GET”)接收数据,但我的 Post 尝试不起作用。这是相关的服务器/WebAPI 代码:
public Department Add(Department item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
departments.Add(item);
return item;
}
...在“departments.Add(item);”上失败 行,当调用来自客户端的此代码时:
const string uri = "http://localhost:48614/api/departments";
var dept = new Department();
dept.Id = 8;
dept.AccountId = "99";
dept.DeptName = "Something exceedingly funky";
var webRequest = (HttpWebRequest)WebRequest.Create(uri);
webRequest.Method = "POST";
var deptSerialized = JsonConvert.SerializeObject(dept); // <-- This is JSON.NET; it works (deptSerialized has the JSONized versiono of the Department object created above)
using (StreamWriter sw = new StreamWriter(webRequest.GetRequestStream()))
{
sw.Write(deptSerialized);
}
HttpWebResponse httpWebResponse = webRequest.GetResponse() as HttpWebResponse;
using (StreamReader sr = new StreamReader(httpWebResponse.GetResponseStream()))
{
if (httpWebResponse.StatusCode != HttpStatusCode.OK)
{
string message = String.Format("POST failed. Received HTTP {0}", httpWebResponse.StatusCode);
throw new ApplicationException(message);
}
MessageBox.Show(sr.ReadToEnd());
}
...在“HttpWebResponse httpWebResponse = webRequest.GetResponse() as HttpWebResponse;”上失败 线。
服务器上的 err msg 是部门为空;deptSerialized 正在填充 JSON“记录”所以......这里缺少什么?
更新
指定 ContentType 确实解决了这个难题。此外,StatusCode 是“已创建”,使上面的代码抛出异常,所以我将其更改为:
using (StreamReader sr = new StreamReader(httpWebResponse.GetResponseStream()))
{
MessageBox.Show(String.Format("StatusCode == {0}", httpWebResponse.StatusCode));
MessageBox.Show(sr.ReadToEnd());
}
...它显示“StatusCode == Created”,然后是我创建的 JSON“记录”(数组成员?术语。?)。