我的代码有问题，我需要将此 Json httprequest 转换为异步方法，以便在 WP7 C# 应用程序中使用它，这是代码，我真的需要这方面的帮助。
它在以下语句中显示错误：
1) myReq.ContentLength = postData.Length;--> ContentLength 不包含该类型的方法
2) webresponse = (HttpWebResponse)myReq.GetResponse(); --> 是 Sync 方法，不包含在 httpresponse 方法中
3) StreamWriter stOut = new StreamWriter(myReq.GetRequestStream(), System.Text.Encoding.ASCII); --> 是 Sync 方法，不包含在 httpresponse 方法中
4) GoogleCell cell = JsonConvert.DeserializeObject(Response);--> 方法重载或缺少转换......并且转换在第 3 次错误。
/// internal google cell info to post
public GoogleCell GetCellInfo(string lac, string mnc, string mcc, string cellID)
{
HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create("https://www.google.com/loc/json");
myReq.Method = "POST";
myReq.ContentType = "application/jsonrequest";
string postData = "{\"cell_towers\": [{\"location_area_code\": \"" + lac + "\", \"mobile_network_code\": \"" + mnc + "\", \"cell_id\": \"" + cellID + "\", \"mobile_country_code\": \"" + mcc + "\"}], \"version\": \"1.1.0\", \"request_address\": \"true\"}";
myReq.ContentLength = postData.Length;
StreamWriter stOut = new StreamWriter(myReq.GetRequestStream(), System.Text.Encoding.ASCII);
stOut.Write(postData);
stOut.Close();
HttpWebResponse webresponse;
webresponse = (HttpWebResponse)myReq.GetResponse();
Encoding enc = System.Text.Encoding.UTF8;
StreamReader loResponseStream = new StreamReader(webresponse.GetResponseStream(), enc);
string Response = loResponseStream.ReadToEnd();
loResponseStream.Close();
webresponse.Close();
GoogleCell cell = JsonConvert.DeserializeObject(Response);
return cell;
}
}