Question

Previously there the bing translator was easily accessible with the SOAP interface. Now it has been migrated to Windows Azure. I have registered in the Azure marketplace for 10000 letters per month (free). How can I translate text through the translator api, for windows phone in C#? Please help. I am not sure how to use the BeginExecute and EndExecute for queries.

I have downloaded and added the TranslatorContainer.cs to my project. For now I am just trying to get the Languages with the GetLanguagesForTranslation method. This is the code which I have written.

public partial class PhonePage1 : PhoneApplicationPage
{

    public PhonePage1()
    {
        InitializeComponent();

        Translator transInstance = new Translator();

    }
    class Translator
    {
        private Uri service_root;
        private TranslatorContainer context;

        public Translator()
        {
            service_root = new Uri("https://api.datamarket.azure.com/Bing/MicrosoftTranslator/");
            context = new TranslatorContainer(service_root);
            context.Credentials = new NetworkCredential("ID","...........");
            var query = context.GetLanguagesForTranslation();
            query.BeginExecute(OnQueryComplete, query);
        }

        public void OnQueryComplete(IAsyncResult result)
        {
            var query = result as DataServiceQuery<Language>;

            string langstring = "";
            foreach (Language lang in query.EndExecute(result))
            {
                langstring += lang.Code + "\n";
            }
            MessageBox.Show(langstring);
        }
    }
}

In OnQueryComplete() the query is null even after the assignment. The result has the Properties IsCompleted as true, and statusCode is OK.
I am not able to figure out how to go about this. Please help.
Thank you

Answer 1

With help from Bing Translator team I got it working in my Silverlight Application:

1. UseDefaultCredentials needs to be turned off on the proxy

2. On the async callback, you were casting the result to a DSQ, but it’s the result’s AsyncState that needs to be casted. See below.

   private void Button_Click_1(object sender, RoutedEventArgs e)
   {
       var serviceUri = new Uri("https://api.datamarket.azure.com/Bing/MicrosoftTranslator/");
       var accountKey = "**********************"; // 
       var tcode = new Microsoft.TranslatorContainer(serviceUri);
   
       tcode.Credentials = new NetworkCredential(accountKey, accountKey);
       tcode.UseDefaultCredentials = false;
       var query = tcode.GetLanguagesForTranslation();
       query.BeginExecute(OnQueryComplete, query);
   }
   
   public void OnQueryComplete(IAsyncResult result)
   {
       var query = (DataServiceQuery<Microsoft.Language>)result.AsyncState;
       var enumerableLanguages = query.EndExecute(result);
       string langstring = "";
       foreach (Microsoft.Language lang in enumerableLanguages)
       {
           langstring += lang.Code + "\n";
       }
       MessageBox.Show(langstring);
   }
   

This way you can use BeginExecute() and BeginEnd() to get Async results.