在Application中集成Microsoft Translator服务之使用http获取服务

一.创建项目

首先我们来创建一个ASP.NET Application

选择时尚时尚最时尚的MVC，为了使演示的Demo更简单，这里选择无身份验证

二.创建相关类

项目需要引入之前两个类AdmAccessToken和AdmAuthentication以便获取访问令牌，并添加一个名为Translator的控制器方便处理相关的业务

注意需要添加程序集System.Runtime.Serialization

添加一个Language_Codes

 public class Language_Codes
    {
        public int Id { get; set; }
        public string code { get; set; }
        public string Name { get; set; }
    }

三.创建数据库上下文类

首先我们需要引入Entity Framework框架，这里使用的是Nuget包管理

添加类CodeEntity，并且让它继承DbContext

public CodeEntity()
            : base("DefaultConnection")
        {
        }
        public DbSet<Language_Codes> Language_Code{get;set;}
}

接下来修改webconfig

<connectionStrings>
    <add name="DefaultConnection" connectionString="server=.;database=LanguageCode;uid=sa;pwd="
      providerName="System.Data.SqlClient" />
  </connectionStrings>

在 TranslatorController中添加

CodeEntity dbcontext = new CodeEntity();

这要我们可以获取语言对应的代码了

四.搭建界面

1.修改Index方法

 public ActionResult Index()
        {
            List<Language_Codes> list=  dbcontext.Language_Code.ToList();
            return View(list);
        }

给TranslatorController的Index添加视图

@model IEnumerable<Translator.Models.Language_Codes>
@{
    ViewBag.Title = "Index";
}
<table  class ="table table-striped">
    <tr>
        <td>
            <label>要翻译的文本</label>
            <textarea id="text" class="form-control"   rows="5"></textarea>
        </td>
        <td>
            将
            <select id="from" class="form-control">
                <option value="1">请选择</option>
                @foreach (var item in Model)
                {
                    <option id="@item.Id" value="@item.code">@item.Name</option>
                }
            </select>
            翻译成
            <select id="to" class="form-control">
                <option value="1">请选择</option>
            </select>
            <button id="submit" class="btn btn-default">翻译</button>
        </td>
        <td>
            <label>翻译的文本</label>
            <textarea id="transtext" class="form-control" rows="5"></textarea>
        </td>
    </tr>
    </table>
在layout.cshtml中添加

1   <div class="navbar-collapse collapse">
2                 <ul class="nav navbar-nav">
3                     <li>@Html.ActionLink("主页", "Index", "Home")</li>
4                     <li>@Html.ActionLink("关于", "About", "Home")</li>
5                     <li>@Html.ActionLink("联系方式", "Contact", "Home")</li>
6                     <li>@Html.ActionLink("翻译", "Index", "Translator")</li>
7                 </ul>
8             </div>

效果如下

五.利用AJAX动态加载数据

1.加载LanguageCode
首先在控制器中添加一个LoadLanguageCode来处理加载语言代码请求

 public ActionResult LoadLanguageCode(int id)
        {
            List<Language_Codes> list = dbcontext.Language_Code.Where(c=>c.Id!=id).ToList();
            return Json(list);
        }


在Scripts文件夹添加一个translator.js文件，并在视图中添加此文件的引用<script src="~/Scripts/translator.js"></script>
给第一个select注册一个事件，每次select中选项更改时我们去加载第二个select的选项
document.getElementById("from").onchange=function()
    {
        var selectedid = $(":selected","#from").attr("id");
        $.ajax(
            {
                url: "../Translator/LoadLanguageCode",
                type: "post",
                data: { id: selectedid },
                success: function (_JsonData)
                {
                    $('#to').empty();
                    for (var i = 0; i < _JsonData.length; i++) {
                        $('#to').append($('<option' + '  id=' + _JsonData[i].Id + '  value=' + _JsonData[i].code + '>' + _JsonData[i].Name + '</option>'));
                    }
                }
            })
    }
2.向microsoft请求服务
在TranslatorController添加 Translate方法

 [HttpPost]
        public ActionResult Translate(string from,string to,string text)
        {
            AdmAuthentication adm = new AdmAuthentication("zuin", "Ursm3pji3Fcha+70plJFrAbHT/Y00F7vyKdXlWLusmc=");
            //string text = textBox1.Text;
            //string from = "zh-CHS";//"zh-CHS"
            //string to = "en";

            string uri = "http://api.microsofttranslator.com/v2/Http.svc/Translate?text=" + System.Web.HttpUtility.UrlEncode(text) + "&from=" + from + "&to=" + to;
            string authToken = "Bearer" + " " + adm.token.access_token;

            HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(uri);
            httpWebRequest.Headers.Add("Authorization", authToken);
            WebResponse response = null;
            try
            {
                response = httpWebRequest.GetResponse();
                using (Stream stream = response.GetResponseStream())
                {
                    System.Runtime.Serialization.DataContractSerializer dcs = new System.Runtime.Serialization.DataContractSerializer(Type.GetType("System.String"));
                    string translation = (string)dcs.ReadObject(stream);
                    return Json(translation);
                }
            }
            catch
            {
                string code = "fail";
                return Json(code);
            }

        }
给“翻译”按钮注册事件

  $('#submit').click( function ()
    {
        var formvalue =$("#from").val();
     
        var tovalue = $("#to").val();
        var textvalue = $("#text").val();
        $.ajax(
            {
                url: "../Translator/Translate",
                type: "post",
                data: {from: formvalue, to: tovalue, text:textvalue },
                success: function (_JsonData) {
                    $('#transtext').empty();
                    if (_JsonData=='fail') {
                        alert("失败！,请联系管理员或使用微软必应在线翻译");
                    }
                    else {
                        document.getElementById("transtext").innerHTML = _JsonData;
                     
                    }
                }
            })
    }
    )

好了现在可以使用服务了

由于业务很复杂，即使网络很好延迟还是很严重，需要优化下