var data = context.Request;
var sr = new StreamReader(data.InputStream);
var stream = sr.ReadToEnd();
var javaScriptSerializer = new JavaScriptSerializer();
var PostedData = javaScriptSerializer.Deserialize<RequestDataJSON>(stream);
string userid = PostedData.idd;
string oldpwd = PostedData.newpwd;
string newpwd = PostedData.oldpwd;