var webRequest = WebRequest.Create(url) as HttpWebRequest;
webRequest.Method = "GET";

webRequest.CookieContainer = cookie; 

webRequest.Referer = referer;

webRequest.Timeout = 20000;
webRequest.Headers.Add("X-Requested-With:XMLHttpRequest");
webRequest.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";

webRequest.UserAgent = useragent;

 using (var webResponse = (HttpWebResponse)webRequest.GetResponse())

 {

　　 using (var reader = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8))

　　 {
　　　　html = reader.ReadToEnd();

　　　　reader.Close();

　　　　webResponse.Close();

　　 }

 } 

var b = function (a, b) {

  for (var d = 0; d < b.length - 2; d += 3) {

    var c = b.charAt(d + 2),

      c = "a" <= c ? c.charCodeAt(0) - 87 : Number(c),

      c = "+" == b.charAt(d + 1) ? a >>> c : a << c;

    a = "+" == b.charAt(d) ? a + c & 4294967295 : a ^ c

  }

  return a

}

 

var tk = function (a,TKK) {

  for (var e = TKK.split("."), h = Number(e[0]) || 0, g = [], d = 0, f = 0; f < a.length; f++) {

    var c = a.charCodeAt(f);

    128 > c ? g[d++] = c : (2048 > c ? g[d++] = c >> 6 | 192 : (55296 == (c & 64512) && f + 1 < a.length && 56320 == (a.charCodeAt(f + 1) & 64512) ? (c = 65536 + ((c & 1023) << 10) + (a.charCodeAt(++f) & 1023), g[d++] = c >> 18 | 240, g[d++] = c >> 12 & 63 | 128) : g[d++] = c >> 12 | 224, g[d++] = c >> 6 & 63 | 128), g[d++] = c & 63 | 128)

  }

  a = h;

  for (d = 0; d < g.length; d++) a += g[d], a = b(a, "+-a^+6");

  a = b(a, "+-3^+b+-f");

  a ^= Number(e[1]) || 0;

  0 > a && (a = (a & 2147483647) + 2147483648);

  a %= 1E6;

  return a.toString() + "." + (a ^ h)

} 

/// <summary>

/// 执行JS

/// </summary>

/// <param name="sExpression">参数体</param>

/// <param name="sCode">JavaScript代码的字符串</param>

/// <returns></returns>

private string ExecuteScript(string sExpression, string sCode)

{

  MSScriptControl.ScriptControl scriptControl = new MSScriptControl.ScriptControl();

  scriptControl.UseSafeSubset = true;

  scriptControl.Language = "JScript";

  scriptControl.AddCode(sCode);

  try

  {

    string str = scriptControl.Eval(sExpression).ToString();

    return str;

  }

  catch (Exception ex)

  {

    string str = ex.Message;

  }

  return null;

}    

/// <summary>

/// 谷歌翻译

/// </summary>

/// <param name="text">待翻译文本</param>

/// <param name="fromLanguage">自动检测：auto</param>

/// <param name="toLanguage">中文：zh-CN，英文：en</param>

/// <returns>翻译后文本</returns>

public string GoogleTranslate(string text, string fromLanguage, string toLanguage)

{

  CookieContainer cc = new CookieContainer();

 

  string GoogleTransBaseUrl = "https://translate.google.com/";

 

  var BaseResultHtml = GetResultHtml(GoogleTransBaseUrl, cc, "");

 

  Regex re = new Regex(@"(?<=TKK=)(.*?)(?=\);)");

 

  var TKKStr = re.Match(BaseResultHtml).ToString() + ")";//在返回的HTML中正则匹配TKK的JS代码

 

  var TKK = ExecuteScript(TKKStr, TKKStr);//执行TKK代码，得到TKK值

 

  var GetTkkJS = File.ReadAllText("./gettk.js");

 

  var tk = ExecuteScript("tk(\""+text+"\",\""+TKK+"\")", GetTkkJS);

 

  string googleTransUrl = "https://translate.google.com/translate_a/single?client=t&sl="+fromLanguage+"&tl="+toLanguage+"&hl=en&dt=at&dt=bd&dt=ex&dt=ld&dt=md&dt=qca&dt=rw&dt=rm&dt=ss&dt=t&ie=UTF-8&oe=UTF-8&otf=1&ssel=0&tsel=0&kc=1&tk="+tk+"&q="+HttpUtility.UrlEncode(text);

 

  var ResultHtml = GetResultHtml(googleTransUrl, cc, "https://translate.google.com/");

 

  dynamic TempResult = Newtonsoft.Json.JsonConvert.DeserializeObject(ResultHtml);

 

  string ResultText = Convert.ToString(TempResult[0][0][0]);

 

  return ResultText;

}

 

public string GetResultHtml(string url,CookieContainer cc,string refer)

{

  var html="";

   

  var webRequest = WebRequest.Create(url) as HttpWebRequest;

 

  webRequest.Method = "GET";

 

  webRequest.CookieContainer = cookie;

 

  webRequest.Referer = referer;

 

  webRequest.Timeout = 20000;

 

  webRequest.Headers.Add("X-Requested-With:XMLHttpRequest");

 

  webRequest.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";

 

  webRequest.UserAgent = useragent;

 

  using (var webResponse = (HttpWebResponse)webRequest.GetResponse())

  {

  　　 using (var reader = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8))

  　　 {

 

  　　　　html = reader.ReadToEnd();

  　　　　reader.Close();

  　　　　webResponse.Close();

  　　 }

  }

  return html;

}

 

/// <summary>

/// 执行JS

/// </summary>

/// <param name="sExpression">参数体</param>

/// <param name="sCode">JavaScript代码的字符串</param>

/// <returns></returns>

private string ExecuteScript(string sExpression, string sCode)

{

  MSScriptControl.ScriptControl scriptControl = new MSScriptControl.ScriptControl();

  scriptControl.UseSafeSubset = true;

  scriptControl.Language = "JScript";

  scriptControl.AddCode(sCode);

  try

  {

    string str = scriptControl.Eval(sExpression).ToString();

    return str;

  }

  catch (Exception ex)

  {

    string str = ex.Message;

  }

  return null;

}