C++动态调用Web Services

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#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

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