VC6开发Web Services 客户端

下面是个控制台的样例
Toolkit3.0 终于给出VC6的样例了，1.0只能看到VB和ASP的

#include <stdio.h>

#import "msxml4.dll"
using namespace MSXML2;

#import "C:\Program Files\Common Files\MSSoap\Binaries\mssoap30.dll" \
            exclude("IStream", "IErrorInfo", "ISequentialStream", "_LARGE_INTEGER", \
                    "_ULARGE_INTEGER", "tagSTATSTG", "_FILETIME")
using namespace MSSOAPLib30;  //你机器得安装SOAP Toolkit3.0 ，1.0时，用using namespace时报错

void Add()
{
   ISoapSerializerPtr Serializer;
   ISoapReaderPtr Reader;
   ISoapConnectorPtr Connector;
   // Connect to the service.
   Connector.CreateInstance(__uuidof(HttpConnector30));  //HttpConnector30 失败，无法这样创建Connector，CXX0017 Error :Symbol “HttpConnector30“ not found（摇头、叹气！）
   Connector->Property["EndPointURL"] = "http://MyServer/Soap3DocSamples/DocSample1/Server/DocSample1.wsdl";  //这个当然得改成您自己的拉
   Connector->Connect();

   // Begin the message.
   //Connector->Property["SoapAction"] = "uri:AddNumbers";
   Connector->Property["SoapAction"] = "http://tempuri.org/DocSample1/action/Sample1.AddNumbers";
   Connector->BeginMessage();

   // Create the SoapSerializer object.
   Serializer.CreateInstance(__uuidof(SoapSerializer30));

   // Connect the serializer object to the input stream of the connector object.
   Serializer->Init(_variant_t((IUnknown*)Connector->InputStream));

   // Build the SOAP Message.
   Serializer->StartEnvelope("","","");
   Serializer->StartBody("");
   Serializer->StartElement("AddNumbers","http://tempuri.org/DocSample1/message/","","");  //这是本地的Web Services,实际中要指定命名空间
   Serializer->StartElement("NumberOne","","","");
   Serializer->WriteString("5");
   Serializer->EndElement();
   Serializer->StartElement("NumberTwo","","","");
   Serializer->WriteString("10");
   Serializer->EndElement();
   Serializer->EndElement();
   Serializer->EndBody();
   Serializer->EndEnvelope();
  
   // Send the message to the XML Web service.
   Connector->EndMessage();     

   // Read the response.
   Reader.CreateInstance(__uuidof(SoapReader30));

   // Connect the reader to the output stream of the connector object.
   Reader->Load(_variant_t((IUnknown*)Connector->OutputStream), "");

   // Display the result.
   printf("Answer: %s\n", (const char*)Reader->RpcResult->text);
   
}

int main()
{
   CoInitialize(NULL);
   Add();
   CoUninitialize();
   return 0;
}

更改 EndPointURL 属性的值. 在URL里指定你的服务器名.

OK

总结一下必要的关键步骤
1.导入类型库

2.需要创建一个SoapConnector

3.下一步创建SoapSerializer

4.下一步把消息附加到SoapConnector的输入流

5.下一步读取结果.要读取服务器的回复,客户端应用需要使用SoapReader,

6.SoapReader被连接到SoapConnector输出流

7.用IXMLDOMElement对象可以从SoapReader里读到服务器的回复