Create
An Enum Class
First, we will create our own enum
class for the languages based from
Google's Languages Enum, as mentioned and shown above. This is really
straight forward. See the code below:
1
using System;
2
3 public class Language
4 {
5 public const string AFRIKAANS =
"af";
6
public const string ALBANIAN = "sq";
7
public const string AMHARIC = "am";
8
public const string ARABIC = "ar";
9
public const string ARMENIAN = "hy";
10 public const string AZERBAIJANI = "az";
11 public const string BASQUE =
"eu";
12 public const string BELARUSIAN =
"be";
13 public const string BENGALI =
"bn";
14 public const string BIHARI =
"bh";
15 public const string BULGARIAN =
"bg";
16 public const string BURMESE =
"my";
17 public const string CATALAN =
"ca";
18 public const string CHEROKEE =
"chr";
19 public const string CHINESE =
"zh";
20 public const string CHINESE_SIMPLIFIED =
"zh-CN";
21 public const string CHINESE_TRADITIONAL =
"zh-TW";
22 public const string CROATIAN =
"hr";
23 public const string CZECH =
"cs";
24 public const string DANISH =
"da";
25 public const string DHIVEHI =
"dv";
26 public const string DUTCH =
"nl";
27 public const string ENGLISH =
"en";
28 public const string ESPERANTO =
"eo";
29 public const string ESTONIAN =
"et";
30 public const string FILIPINO =
"tl";
31 public const string FINNISH =
"fi";
32 public const string FRENCH =
"fr";
33 public const string GALICIAN = "gl";
34 public const string GEORGIAN =
"ka";
35 public const string GERMAN =
"de";
36 public const string GREEK =
"el";
37 public const string GUARANI =
"gn";
38 public const string GUJARATI =
"gu";
39 public const string HEBREW = "iw";
40 public const string HINDI =
"hi";
41 public const string HUNGARIAN =
"hu";
42 public const string ICELANDIC =
"is";
43 public const string INDONESIAN =
"id";
44 public const string INUKTITUT =
"iu";
45 public const string ITALIAN =
"it";
46 public const string JAPANESE =
"ja";
47 public const string KANNADA =
"kn";
48 public const string KAZAKH =
"kk";
49 public const string KHMER =
"km";
50 public const string KOREAN =
"ko";
51 public const string KURDISH =
"ku";
52 public const string KYRGYZ =
"ky";
53 public const string LAOTHIAN =
"lo";
54 public const string LATVIAN =
"lv";
55 public const string LITHUANIAN =
"lt";
56 public const string MACEDONIAN =
"mk";
57 public const string MALAY =
"ms";
58 public const string MALAYALAM =
"ml";
59 public const string MALTESE =
"mt";
60 public const string MARATHI =
"mr";
61 public const string MONGOLIAN =
"mn";
62 public const string NEPALI =
"ne";
63 public const string NORWEGIAN =
"no";
64 public const string ORIYA =
"or";
65 public const string PASHTO =
"ps";
66 public const string PERSIAN =
"fa";
67 public const string POLISH =
"pl";
68 public const string PORTUGUESE =
"pt-PT";
69 public const string PUNJABI =
"pa";
70 public const string ROMANIAN =
"ro";
71 public const string RUSSIAN =
"ru";
72 public const string SANSKRIT =
"sa";
73 public const string SERBIAN =
"sr";
74 public const string SINDHI = "sd";
75 public const string SINHALESE =
"si";
76 public const string SLOVAK =
"sk";
77 public const string SLOVENIAN =
"sl";
78 public const string SPANISH =
"es";
79 public const string SWAHILI =
"sw";
80 public const string SWEDISH =
"sv";
81 public const string TAJIK =
"tg";
82 public const string TAMIL =
"ta";
83 public const string TAGALOG =
"tl";
84 public const string TELUGU =
"te";
85 public const string THAI = "th";
86 public const string TIBETAN =
"bo";
87 public const string TURKISH =
"tr";
88 public const string UKRAINIAN =
"uk";
89 public const string URDU = "ur";
90 public const string UZBEK =
"uz";
91 public const string UIGHUR =
"ug";
92 public const string VIETNAMESE =
"vi";
93 public const string UNKNOWN =
"";
94
95 public Language()
96 {
97 }
98
}
The Translation Method
We will also create a method that returns a translated
string. In this example, the method is
inside my test ASP.NET Page, that's why it's
private,
I recommend moving it to a
public class,
and make it
static so other
pages will have access to this method.
30 private string Translate(string
stringToTranslate,
string fromLanguage, string toLanguage)
31 {
32
// make sure that the passed string is not empty or null
33
if (!String.IsNullOrEmpty(stringToTranslate))
34
{
35 // per Google's terms of use, we can
only translate
36 // a string of up to 5000 characters
long
37
if (stringToTranslate.Length
<= 5000)
38 {
39 const int bufSizeMax = 65536;
40 const int bufSizeMin = 8192;
41
42 try
43 {
44 // by default format? is text.
// so we don't need to send a format? key
45 string requestUri = "http://ajax.googleapis.com/
ajax/services/language/translate?v=1.0&q=" +
46 stringToTranslate + "&langpair="
+
47 fromLanguage + "%7C"
+ toLanguage;
48
49 // execute the request and get
the response stream
50 HttpWebRequest request =
(HttpWebRequest)WebRequest.Create(requestUri);
51 HttpWebResponse response =
(HttpWebResponse)request.GetResponse();
52 Stream responseStream =
response.GetResponseStream();
53
54 // get the length of the
content returned by the request
55 int length = (int)response.ContentLength;
56 int bufSize = bufSizeMin;
57
58 if (length > bufSize)
59 bufSize = length >
bufSizeMax ? bufSizeMax : length;
60
61 // allocate buffer and
StringBuilder for reading response
62 byte[] buf = new byte[bufSize];
63 StringBuilder sb = new
StringBuilder(bufSize);
64
65 // read the whole response
66 while ((length =
responseStream.Read(buf, 0, buf.Length)) != 0)
67 {
68
sb.Append(Encoding.UTF8.GetString(buf, 0, length));
69 }
70
71 // the format of the response
is like this
72 // {"responseData":
{"translatedText":"¿Cómo estás?"},
"responseDetails": null,
"responseStatus": 200}
73 // so now let's clean up the
response by manipulating the string
74 string translatedText =
sb.Remove(0, 36).ToString();
75 translatedText =
translatedText.Substring(0,
translatedText.IndexOf("\"},"));
76
77 return translatedText;
78 }
79 catch
80 {
81 return "Cannot get the
translation. Please try again
later.";
82 }
83 }
84 else
85 {
86 return "String to translate
must be less than 5000 characters long.";
87 }
88
}
89
else
90
{
91 return "String to translate is
empty.";
92
}
93 }
Notice that the method accepts three
(3) parameters; the string to translate, the language to translate from, and the
language to translate to. The most important part of this code can be seen in
lines 45-52. Lines 45-47 build a URL that sends a request and gets the
response shown in lines 50-52. Because we're accessing the API via Google's
Rest Interface, the response is returned through a Stream
object. This is a lot easier to code
as compared to web services. The returned string encoded from the stream is cleaned-up (lines 74-75) and returned as the translated string.
Ready
to Translate
Translating is again very straight
forward. We simply call the Translate method that we built above to get translated strings.
9 protected
void Page_Load(object sender, EventArgs e)
10 {
11
string stringToTranslate = "Where do you live?
What's your name? My name is Junnark.";
12
Response.Write("<b>English:</b> " +
stringToTranslate + "<br/><br/>");
13
14
string translatedString =
Translate(stringToTranslate, Language.ENGLISH, Language.FILIPINO);
15
Response.Write("<b>Filipino:</b> " +
translatedString + "<br/><br/>");
16
17
translatedString =
Translate(stringToTranslate, Language.ENGLISH, Language.SPANISH);
18
Response.Write("<b>Spanish:</b> " +
translatedString + "<br/><br/>");
19
20
translatedString =
Translate(stringToTranslate, Language.ENGLISH, Language.CHINESE);
21
Response.Write("<b>Chinese:</b> " +
translatedString + "<br/><br/>");
22
23
translatedString =
Translate(stringToTranslate, Language.ENGLISH, Language.FRENCH);
24
Response.Write("<b>French:</b> " +
translatedString + "<br/><br/>");
25
26
translatedString =
Translate(stringToTranslate, Language.ENGLISH, Language.JAPANESE);
27
Response.Write("<b>Japanese:</b> " +
translatedString + "<br/><br/>");
28 }
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