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一般添加web服务引用是.NET用代理类模式 创建SOAP请求代理类，代理类是.NET开发工具VS自动给你生成。 下面用一般HTTP的模式有时候可能更合适，原理是构造SOAP请求的XML后POST过去： 下面是HelloWorld的例子 private void button1_Click(object sender, EventArgs e)
{
//创建HttpWebRequest 实例，使用WebRequest.Create
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create("http://localhost:1198/WebSite1/Service.asmx");
//发送请求
webRequest.Method = "POST";
//编码
webRequest.ContentType = "text/xml";
string soap = "<?xml version=\"1.0\" encoding=\"utf-8\"?>";
soap += "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">";
soap += " <soap:Header>";
soap += " </soap:Header>";
soap += "<soap:Body>";
soap += " <HelloWorld xmlns=\"http://tempuri.org/\" />";
soap += "</soap:Body>";
soap += "</soap:Envelope>";
// webRequest.Headers["SoapAction"] = "http://localhost:1198/WebSite1/Service.asmx";
//字符转字节
byte[] bytes = Encoding.UTF8.GetBytes(soap);
Stream writer = webRequest.GetRequestStream();
writer.Write(bytes, 0, bytes.Length);
writer.Flush();
writer.Close();
string result = "";
//返回 HttpWebResponse
try
{
HttpWebResponse hwRes = webRequest.GetResponse() as HttpWebResponse;
if (hwRes.StatusCode == System.Net.HttpStatusCode.OK)
{//是否返回成功
Stream rStream = hwRes.GetResponseStream();
//流读取
StreamReader sr = new StreamReader(rStream, Encoding.UTF8);
result = sr.ReadToEnd();
sr.Close();
rStream.Close();
}
else
{
result = "连接错误";
}
//关闭
hwRes.Close();
txtResponse.Text = result;
}
catch (System.Net.WebException ex)
{
String responseFromServer = ex.Message.ToString() + " ";
if (ex.Response != null)
{
using (WebResponse response = ex.Response)
{
Stream data = response.GetResponseStream();
using (StreamReader reader = new StreamReader(data))
{
responseFromServer += reader.ReadToEnd();
}
}
}
txtResponse.Text = responseFromServer;
}
}
不错意外会返回如下： <?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><HelloWorldResponse xmlns="http://tempuri.org/"><HelloWorldResult>Hello World</HelloWorldResult></HelloWorldResponse></soap:Body></soap:Envelope>
不构造XML结构请求也是可以的： /*
/*POST /WebSite1/Service.asmx/HelloWorld HTTP/1.1
Host: localhost
Content-Type: application/x-www-form-urlencoded
Content-Length: length
*/
//创建HttpWebRequest 实例，使用WebRequest.Create
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create("http://localhost:1198/WebSite1/Service.asmx/HelloWorld");
//发送请求
webRequest.Method = "POST";
webRequest.ContentType = "application/x-www-form-urlencoded";
webRequest.ContentLength=0;
string soap = "";//请求参数如 soap = "str=wgscd&num=123";
//字符转字节
byte[] bytes = Encoding.UTF8.GetBytes(soap);
Stream writer = webRequest.GetRequestStream();
writer.Write(bytes, 0, bytes.Length);
writer.Flush();
writer.Close();
string result = "";
//返回 HttpWebResponse
try
{
HttpWebResponse hwRes = webRequest.GetResponse() as HttpWebResponse;
if (hwRes.StatusCode == System.Net.HttpStatusCode.OK)
{//是否返回成功
Stream rStream = hwRes.GetResponseStream();
//流读取
StreamReader sr = new StreamReader(rStream, Encoding.UTF8);
result = sr.ReadToEnd();
sr.Close();
rStream.Close();
}
else
{
result = "连接错误";
}
//关闭
hwRes.Close();
txtResponse.Text = result;
}
catch (Exception ex)
{
txtResponse.Text = ex.Message ;
}
会返回： <?xml version="1.0" encoding="utf-8"?> <string xmlns="http://tempuri.org/">Hello World</string>
不构造XML请求结构的一个死穴是，那种传人参数是某个对象/类的情况就GG了。 如： [WebMethod] DataRet d =new DataRet();
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