VC6.0调用ASP.NET WebService示例

// WebService.cs
using System;
using System.Web;
using System.ComponentModel;
using System.Web.Services;
using System.Web.Services.Protocols;
[WebService(Namespace = "http://Fantasy/WebServiceDemo/")]
[System.Web.Services.Protocols.SoapRpcService]
public class Service : System.Web.Services.WebService
{
    public Service()
    {
        //如果使用设计的组件，请取消注释以下行 
        //InitializeComponent();
    }
    [WebMethod]
    public int AddNumbers(int NumberOne,int NumberTwo)
    {
        return NumberOne + NumberTwo;
    }
}

// soapDemo.cpp
#include <stdio.h>
#include <stdlib.h>
//先导入msxml4.dll，再导入mssoap30.dll
#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;
void Add(int No1,int No2)
{
	//char *_itoa( int value, char *string, int radix );
	char str1[10],str2[10];	
	itoa(No1,str1,10);	itoa(No2,str2,10);
	ISoapSerializerPtr Serializer;
	ISoapReaderPtr Reader;
	ISoapConnectorPtr Connector;	
	// Connect to the service.
	Connector.CreateInstance(__uuidof(HttpConnector30));	
	Connector->Property["EndPointURL"] = "http://localhost/WebServiceDemo/Service.asmx";	Connector->Connect();
	// Begin the message.
	Connector->Property["SoapAction"] = "http://Fantasy/WebServiceDemo/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("","","");	
	//这里可以添加SoapHeader验证代码：
	
    /*
Serializer->StartHeader("");
Serializer->StartHeaderElement("MyHeader","http://Fantasy/WebServiceDemo/",0,"","NONE","");
Serializer->StartElement("UserName","","","");//填充参数2则出错。
Serializer->WriteString(_bstr_t(userName));
*/

	Serializer->StartBody("");		
	Serializer->StartElement("AddNumbers","http://Fantasy/WebServiceDemo/","","");
	//	(第三个参数可有可无，若加上第二个参数出错！？)
	Serializer->StartElement("NumberOne","","","");// NumberOne=
	Serializer->WriteString((_bstr_t)str1);
	Serializer->EndElement();			
	Serializer->StartElement("NumberTwo","","","");// NumberOne=	
	Serializer->WriteString((_bstr_t)str2);
	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(12,24);	
	CoUninitialize();
	return 0;	
}