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, 0, 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。