ASP.NET WebServce项目下添加Http服务，支持Get，Post请求方式;传输格式json/xml

由于WEBServce老项目中需要增添新的接口，而且添加的接口不希望被其它项目以引用Servces方式使用。

那么得在现有Service项目中添加Http请求方式来实现系统间数据交互。只需要告知请求地址，请求方法(GET,POST)，和数据格式(JSON,XML)即可实现了。

客户端就如同调用普通HTTP接口一样。这样就不用强制引用啦！

要让WebService支持HTTP调用，首先需要在配置文件system.web节点下添加：

<webServices>

<protocols>
<add name="HttpPost"/>
<add name="HttpGet"/>
</protocols>
</webServices>

服务端代码实现：

首先添加文件 TestService.asmx，添加如下方法：

 ......

 [WebMethod]
 public void TestSer()
 {
 var paramsHt = GetFormPostData<ReqData>();

 Record record = new Record();

 record.RetValue = new JavaScriptSerializer().Serialize(paramsHt);
 List<Record> list = new List<Record>();
 list.Add(record);

 ResponseJSON<Record>(list);
 }

 //将请求数据转换为对象T

 public static T GetFormPostData<T>()
 {
 var reqData = HttpContext.Current.Request;

 var data = default(T);
 using (StreamReader reqStream = new StreamReader(HttpContext.Current.Request.InputStream,System.Text.Encoding.UTF8))
 {
 data = new JavaScriptSerializer().Deserialize<T>(HttpContext.Current.Server.UrlDecode(reqStream.ReadToEnd()));
 }

 return data;
 }

 public static void ResponseJSON<T>(List<T> ret)
 {
 string json = new JavaScriptSerializer().Serialize(ret);

 HttpResponse res = HttpContext.Current.Response;
 res.ContentType = "text/plain";
 res.Charset = "utf-8";
 res.ContentEncoding = Encoding.UTF8;

 res.Write(json);

 }

 //构造请求数据

 public class ReqData
 {
 public int ID { get; set; }
 public string Name { get; set; }
 }

 ......

WebForm请求端代码：

         protected void Button1_Click(object sender, EventArgs e)
         {
             string strURL = this.txtURL.Text.Trim();

             try
             {
                 byte[] postBytes = Encoding.UTF8.GetBytes(Server.UrlDecode(this.txtData.Text.Trim()));
                 HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(strURL);
                 myRequest.Method = "POST";
                 myRequest.ContentType = "application/xml";
                 //myRequest.ContentType = "text/html";
                 myRequest.ContentLength = postBytes.Length;
                 myRequest.Proxy = null;
                 Stream newStream = myRequest.GetRequestStream();
                 newStream.Write(postBytes, , postBytes.Length);
                 newStream.Close();
                 // Get response
                 HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
                 using (StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.GetEncoding("utf-8")))
                 {
                     string content = reader.ReadToEnd();

                     this.lblResponseData.Text = content;
                 }
             }
             catch (System.Exception ex)
             {

                 this.lblResponseData.Text = ex.Message;
             }
  }

请求地址：http://localhost:43211/TestService.asmx/TestSer

请求数据：{"Name":"aa","ID":11}

当请求Json数据格式不规范时，可能会报错：传入的对象无效，应为“:”或“}”，请检查构造json数据是否规范，如双引号，分号，逗号，大括号等。