Post方式调用wcf服务

我们平常在PC端调用WCF服务，只要知道WCF服务的地址，客户端直接添加引用服务就可以使用了，殊不知还有其他方式，其实，我们也可以

通过HTTP POST的方式调用WCF服务，这样就不用添加引用了，在手机移动端开发后台服务，都是通过Post的形式调用WCF服务，当然，这种方式在PC也可以使用。

我们来看下面的一个简单示例。下面的示例演示了服务器端和客户端的简单通讯

服务器端返回一个JSON字符串，代码如下

契约定义

[OperationContract]
[WebInvoke(UriTemplate = "AddData", Method = "POST", RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare, ResponseFormat = WebMessageFormat.Json)]
string AddData(Stream stream);

契约实现

public string AddData(Stream stream)
{
StreamReader sr = new StreamReader(stream);
string s = sr.ReadToEnd();
sr.Dispose();
NameValueCollection nvc = HttpUtility.ParseQueryString(s);

string appKey = nvc["appKey"];
string sign = nvc["sign"];
string name=nvc["username"];

var result = new ErrorModel
{
IsError = true,
ErrorCode = -2,
ErrorMsg = "操作信息",
};
return new JavaScriptSerializer().Serialize(result);
}

客户端调用

public static string postSend(string url, string param)
{
Encoding myEncode = Encoding.GetEncoding("UTF-8");
byte[] postBytes = Encoding.UTF8.GetBytes(param);

HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url);
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded;charset=UTF-8";
req.ContentLength = postBytes.Length;

try
{
using (Stream reqStream = req.GetRequestStream())
{
reqStream.Write(postBytes, 0, postBytes.Length);
}
using (WebResponse res = req.GetResponse())
{
using (StreamReader sr = new StreamReader(res.GetResponseStream(), myEncode))
{
string strResult = sr.ReadToEnd();
return strResult;
}
}
}
catch (WebException ex)
{
return "无法连接到服务器\r\n错误信息：" + ex.Message;
}
}

string param = "appKey=44hbf622op&username=13011001233&sign=123456";

postSend("http://localhost:17446/CusDataService.svc/AddData", param);