I’m trying to implement the C# code for a Sharepoint web part using Microsoft Translate API, found with sample code here.
http://msdn.microsoft.com/en-us/library/ff512421.aspx
I’ve managed to solve other problems, but when i tried to deploy, i get 10 errors concerning to the DataMember and DataContract related lines. I’m new to .NET and C#, i hope i can get some help here. I have tried this several times, i didn’t get this error before though i got stock with other reference problems. Now that i recreated, i get this error.
The type or namespace name 'DataContract' could not be found (are you missing a using directive or an assembly reference?)
This is my code.
using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Text;
using System.Net;
using System.IO;
using System.Runtime.Serialization.Json;
using System.Runtime.Serialization;
using System.Web;
using System.Media;
using Microsoft.SharePoint;
using System.Data.SqlClient;
namespace MyTranslatorTool.MyTranslator
{
public partial class MyTranslatorUserControl : UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
AdmAccessToken admToken;
string headerValue;
//Get Client Id and Client Secret from https://datamarket.azure.com/developer/applications/
//Refer obtaining AccessToken (http://msdn.microsoft.com/en-us/library/hh454950.aspx)
AdmAuthentication admAuth = new AdmAuthentication("clientid", "gpOGezhz/1dX6hgR6QZhG2j0Z45vw4HlnMWOwr2gNeA+");
try
{
admToken = admAuth.GetAccessToken();
// Create a header with the access_token property of the returned token
headerValue = "Bearer " + admToken.access_token;
TranslateMethod(headerValue);
}
catch (WebException er)
{
ProcessWebException(er);
Console.WriteLine("Press any key to continue...");
Console.ReadKey(true);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
Console.WriteLine("Press any key to continue...");
Console.ReadKey(true);
}
}
private static void TranslateMethod(string authToken)
{
//original text = text
//translated text = translation
//original language = from
//destinating language = to
string text = "Use pixels to express measurements for padding and margins.";
string from = "en";
string to = "de";
string uri = "http://api.microsofttranslator.com/v2/Http.svc/Translate?text=" + System.Web.HttpUtility.UrlEncode(text) + "&from=" + from + "&to=" + to;
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(uri);
httpWebRequest.Headers.Add("Authorization", authToken);
WebResponse response = null;
try
{
response = httpWebRequest.GetResponse();
using (Stream stream = response.GetResponseStream())
{
//translated text
System.Runtime.Serialization.DataContractSerializer dcs = new System.Runtime.Serialization.DataContractSerializer(Type.GetType("System.String"));
string translation = (string)dcs.ReadObject(stream);
Console.WriteLine("Translation for source text '{0}' from {1} to {2} is", text, "en", "de");
Console.WriteLine(translation);
//push to view
//alpha.Text = translation;
}
Console.WriteLine("Press any key to continue...");
Console.ReadKey(true);
}
catch
{
throw;
}
finally
{
if (response != null)
{
response.Close();
response = null;
}
}
}
private static void ProcessWebException(WebException e)
{
Console.WriteLine("{0}", e.ToString());
// Obtain detailed error information
string strResponse = string.Empty;
using (HttpWebResponse response = (HttpWebResponse)e.Response)
{
using (Stream responseStream = response.GetResponseStream())
{
using (StreamReader sr = new StreamReader(responseStream, System.Text.Encoding.ASCII))
{
strResponse = sr.ReadToEnd();
}
}
}
Console.WriteLine("Http status code={0}, error message={1}", e.Status, strResponse);
}
}
[DataContract]
public class AdmAccessToken
{
[DataMember]
public string access_token { get; set; }
[DataMember]
public string token_type { get; set; }
[DataMember]
public string expires_in { get; set; }
[DataMember]
public string scope { get; set; }
}
public class AdmAuthentication
{
public static readonly string DatamarketAccessUri = "https://datamarket.accesscontrol.windows.net/v2/OAuth2-13";
private string clientId;
private string cientSecret;
private string request;
public AdmAuthentication(string clientId, string clientSecret)
{
this.clientId = clientId;
this.cientSecret = clientSecret;
//If clientid or client secret has special characters, encode before sending request
this.request = string.Format("grant_type=client_credentials&client_id={0}&client_secret={1}&scope=http://api.microsofttranslator.com", HttpUtility.UrlEncode(clientId), HttpUtility.UrlEncode(clientSecret));
}
public AdmAccessToken GetAccessToken()
{
return HttpPost(DatamarketAccessUri, this.request);
}
private AdmAccessToken HttpPost(string DatamarketAccessUri, string requestDetails)
{
//Prepare OAuth request
WebRequest webRequest = WebRequest.Create(DatamarketAccessUri);
webRequest.ContentType = "application/x-www-form-urlencoded";
webRequest.Method = "POST";
byte[] bytes = Encoding.ASCII.GetBytes(requestDetails);
webRequest.ContentLength = bytes.Length;
using (Stream outputStream = webRequest.GetRequestStream())
{
outputStream.Write(bytes, 0, bytes.Length);
}
using (WebResponse webResponse = webRequest.GetResponse())
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(AdmAccessToken));
//Get deserialized object from JSON stream
AdmAccessToken token = (AdmAccessToken)serializer.ReadObject(webResponse.GetResponseStream());
return token;
}
}
}
}
Try adding a reference to: System.Runtime.Serialization