Translate Method

Translates a text string from one language to another.

string Microsoft.Translator.Translate(appId, text, from, to, contentType, category);

Parameter Description


Required. If the Authorization header is used, leave the appid field empty else specify a string containing "Bearer" + " " + access token.


Required. A string representing the text to translate. The size of the text must not exceed 10000 characters.


Optional. A string representing the language code of the translation text. If left empty the response will include the result of language auto-detection.


Required. A string representing the language code to translate the text into.


Required. The format of the text being translated. The supported formats are "text/plain" and "text/html". Any HTML needs to be well-formed.


Optional. A string containing the category (domain) of the translation. Defaults to "general".

Request Headers

The following table describes required and optional request headers.

Request Header Description


Required. Specify the the value of access_token in format "Bearer" + " " + Access Token Value

Return value

A string representing the translated text. If you previously use AddTranslation or AddTranslationArray to enter a translation with a rating of 5 or higher for the same source sentence, Translate returns only the top choice that is available to your system. The "same source sentence" means the exact same (100% matching), except for capitalization, white space, tag values, and punctuation at the end of a sentence. If no rating is stored with a rating of 5 or above then the returned result will be the automatic translation by Microsoft Translator.

Ff512437.alert_note(en-us,MSDN.10).gif Note

Bing App ID is deprecated and is no longer supported.   Please obtain an access token to use the Microsoft Translator API. For details, go here.



                                                using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Runtime.Serialization.Json;
using System.Runtime.Serialization;
using System.Web;
using System.ServiceModel.Channels;
using System.ServiceModel;
namespace MicrosoftTranslatorSdk.SoapSamples
    class Program
        static void Main(string[] args)
            AdmAccessToken admToken;
            string headerValue;
            //Get Client Id and Client Secret from
            //Refer obtaining AccessToken ( 
            AdmAuthentication admAuth = new AdmAuthentication("clientId", "client secret");
                admToken = admAuth.GetAccessToken();
                DateTime tokenReceived = DateTime.Now;
                // Create a header with the access_token property of the returned token
                headerValue = "Bearer " + admToken.access_token;
            catch (Exception ex)
                Console.WriteLine("Press any key to continue...");
        private static void TranslateMethod(string authToken)
            // Add TranslatorService as a service reference, Address:
            TranslatorService.LanguageServiceClient client = new TranslatorService.LanguageServiceClient();
            //Set Authorization header before sending the request
            HttpRequestMessageProperty httpRequestProperty = new HttpRequestMessageProperty();
            httpRequestProperty.Method = "POST";
            httpRequestProperty.Headers.Add("Authorization", authToken);
            // Creates a block within which an OperationContext object is in scope.
            using (OperationContextScope scope = new OperationContextScope(client.InnerChannel))
                OperationContext.Current.OutgoingMessageProperties[HttpRequestMessageProperty.Name] = httpRequestProperty;
                string sourceText = "<UL><LI>Use generic class names. <LI>Use pixels to express measurements for padding and margins. <LI>Use percentages to specify font size and line height. <LI>Use either percentages or pixels to specify table and container width.   <LI>When selecting font families, choose browser-independent alternatives.   </LI></UL>";
                string translationResult;
                //Keep appId parameter blank as we are sending access token in authorization header.
                translationResult = client.Translate("", sourceText, "en", "de", "text/html", "general");
                Console.WriteLine("Translation for source {0} from {1} to {2} is", sourceText, "en", "de");
                Console.WriteLine("Press any key to continue...");
    public class AdmAccessToken
        public string access_token { get; set; }
        public string token_type { get; set; }
        public string expires_in { get; set; }
        public string scope { get; set; }
    public class AdmAuthentication
        public static readonly string DatamarketAccessUri = "";
        private string clientId;
        private string clientSecret;
        private string request;
        private AdmAccessToken token;
        private Timer accessTokenRenewer;
        //Access token expires every 10 minutes. Renew it every 9 minutes only.
        private const int RefreshTokenDuration = 9;
        public AdmAuthentication(string clientId, string clientSecret)
            this.clientId = clientId;
            this.clientSecret = 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=", HttpUtility.UrlEncode(clientId), HttpUtility.UrlEncode(clientSecret));
            this.token = HttpPost(DatamarketAccessUri, this.request);
            //renew the token every specified minutes
            accessTokenRenewer = new Timer(new TimerCallback(OnTokenExpiredCallback), this, TimeSpan.FromMinutes(RefreshTokenDuration), TimeSpan.FromMilliseconds(-1));
        public AdmAccessToken GetAccessToken()
            return this.token;
        private void RenewAccessToken()
            AdmAccessToken newAccessToken = HttpPost(DatamarketAccessUri, this.request);
            //swap the new token with old one
            //Note: the swap is thread unsafe
            this.token = newAccessToken;
            Console.WriteLine(string.Format("Renewed token for user: {0} is: {1}", this.clientId, this.token.access_token));
        private void OnTokenExpiredCallback(object stateInfo)
            catch (Exception ex)
                Console.WriteLine(string.Format("Failed renewing access token. Details: {0}", ex.Message));
                    accessTokenRenewer.Change(TimeSpan.FromMinutes(RefreshTokenDuration), TimeSpan.FromMilliseconds(-1));
                catch (Exception ex)
                    Console.WriteLine(string.Format("Failed to reschedule the timer to renew access token. Details: {0}", ex.Message));
        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;

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class AccessTokenAuthentication {
     * Get the access token.
     * @param string $grantType    Grant type.
     * @param string $scopeUrl     Application Scope URL.
     * @param string $clientID     Application client ID.
     * @param string $clientSecret Application client ID.
     * @param string $authUrl      Oauth Url.
     * @return string.
    function getTokens($grantType, $scopeUrl, $clientID, $clientSecret, $authUrl){
        try {
            //Initialize the Curl Session.
            $ch = curl_init();
            //Create the request Array.
            $paramArr = array (
             'grant_type'    => $grantType,
             'scope'         => $scopeUrl,
             'client_id'     => $clientID,
             'client_secret' => $clientSecret
            //Create an Http Query.//
            $paramArr = http_build_query($paramArr);
            //Set the Curl URL.
            curl_setopt($ch, CURLOPT_URL, $authUrl);
            //Set HTTP POST Request.
            curl_setopt($ch, CURLOPT_POST, TRUE);
            //Set data to POST in HTTP "POST" Operation.
            curl_setopt($ch, CURLOPT_POSTFIELDS, $paramArr);
            //CURLOPT_RETURNTRANSFER- TRUE to return the transfer as a string of the return value of curl_exec().
            curl_setopt ($ch, CURLOPT_RETURNTRANSFER, TRUE);
            //CURLOPT_SSL_VERIFYPEER- Set FALSE to stop cURL from verifying the peer's certificate.
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            //Execute the  cURL session.
            $strResponse = curl_exec($ch);
            //Get the Error Code returned by Curl.
            $curlErrno = curl_errno($ch);
                $curlError = curl_error($ch);
                throw new Exception($curlError);
            //Close the Curl Session.
            //Decode the returned JSON string.
            $objResponse = json_decode($strResponse);
            if ($objResponse->error){
                throw new Exception($objResponse->error_description);
            return $objResponse->access_token;
        } catch (Exception $e) {
            echo "Exception-".$e->getMessage();

 * Class:AccessTokenAuthentication
 * Create SOAP Object.
class SOAPMicrosoftTranslator {
     * Soap Object.
     * @var ObjectArray.
    public $objSoap;
     * Create the SAOP object.
     * @param string $accessToken Access Token string.
     * @param string $wsdlUrl     WSDL string.
     * @return string.
    public function __construct($accessToken, $wsdlUrl){
        try {
            //Authorization header string.
            $authHeader = "Authorization: Bearer ". $accessToken;
            $contextArr = array(
                'http'   => array(
                    'header' => $authHeader
            //Create a streams context.
            $objContext = stream_context_create($contextArr);
            $optionsArr = array (
                'soap_version'   => 'SOAP_1_2',
                'encoding'          => 'UTF-8',
                'exceptions'      => true,
                'trace'          => true,
                'cache_wsdl'     => 'WSDL_CACHE_NONE',
                'stream_context' => $objContext,
                'user_agent'     => 'PHP-SOAP/'.PHP_VERSION."\r\n".$authHeader    
            //Call Soap Client.
            $this->objSoap = new SoapClient($wsdlUrl, $optionsArr);
        } catch(Exception $e){
            echo "<h2>Exception Error!</h2>";
            echo $e->getMessage();

try {
    //Soap WSDL Url
    $wsdlUrl       = "";
    //Client ID of the application.
    $clientID       = "ClientId";
    //Client Secret key of the application.
    $clientSecret = "ClientSecret";
    //OAuth Url.
    $authUrl      = "";
    //Application Scope Url
    $scopeUrl     = "";
    //Application grant type
    $grantType    = "client_credentials";

    //Create the Authentication object
    $authObj      = new AccessTokenAuthentication();
    //Get the Access token
    $accessToken  = $authObj->getTokens($grantType, $scopeUrl, $clientID, $clientSecret, $authUrl);
    //Create soap translator Object
    $soapTranslator = new SOAPMicrosoftTranslator($accessToken, $wsdlUrl);
    //Set the params.//
    $fromLanguage = "en";
    $toLanguage   = "de";
    $inputStr     = "Use pixels to express measurements for padding and margins.";
    //Request argument list.
    $requestArg = array (
         'text'        => $inputStr,
         'from'        => $fromLanguage,
         'to'            => $toLanguage,
         'contentType' => 'text/plain',
         'category'    => 'general'

    echo "<table border=2px>";
    echo "<tr>";
    echo "<td><b>From $fromLanguage</b></td><td><b>To $toLanguage</b></td>";
    echo "</tr>";
    $responseObj = $soapTranslator->objSoap->Translate($requestArg);
    echo "<tr><td>".$inputStr."</td><td>".$responseObj->TranslateResult."</td></tr>";
    echo "</table>";
} catch (Exception $e) {
    echo "Exception: " . $e->getMessage() . "<br/>";
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