Windows phone 8 中的 HttpWebRequest
我正在使用 c#/xaml 开发一个 windows phone 8 应用程序。我在httpwebrequest类中遇到了一些问题。我想使用 post 方法从服务器下载数据。但是 httpwebrequest 没有按预期工作。当我随后尝试调用 Web服务时，它返回错误 （远程服务器返回错误：NotFound） 。可能是什么原因？。请帮助...以下是我的代码。
string response = "";
httpwebrequest = WebRequest.Create(new Uri(serviceurl)) as HttpWebRequest;
httpwebrequest.Method = "POST";
httpwebrequest.ContentType = "application/json";
byte[] data = Serialization.SerializeData(request);
using (var requestStream = await Task<Stream>.Factory.FromAsync(httpwebrequest.BeginGetRequestStream, httpwebrequest.EndGetRequestStream, null))
{
await requestStream.WriteAsync(data, 0, data.Length);
}
response = await httpRequest(httpwebrequest);
var result = Serialization.Deserialize<T>(response);
return result;
}
public async Task<string> httpRequest(HttpWebRequest request)
{
try
{
string received;
using (var response = (HttpWebResponse)(await Task<WebResponse>.Factory.FromAsync(request.BeginGetResponse, request.EndGetResponse, null)))
{
using (var responseStream = response.GetResponseStream())
{
using (var sr = new StreamReader(responseStream))
{
received = await sr.ReadToEndAsync();
}
}
response.Close();
}
return received;
}
catch(Exception ex)
{
return "";
}
}