<< Go Back

Windows Web Services Api Client Code Walkthrough On Windows 7

- 24 Mar 2009

I decided to Dive into the WWSAPI Beta and see how I could call a simple HelloWorld Applications. Here are my adventures:

I installed Windows 7 in a HyperV VM and installed Visual Studio 2008 SP1.

I downloaded the Windows 7 SDK and attached the .ISO image as the CD drive and installed it.

I then ran the Windows SDK Configuration Tool and selected the Windows 7 SDK configuration.Then I downloaded this wsdl: http://jsandersrocks.members.winisp.net/WebServiceTest/WebService.asmx?WSDL I created a C++ console application with the defaults from the template and named it WWSAPITest. I created a subdirectory called ‘wsdl’ in my new project and copied the WSDL into this directory and called it MyWebService.wsdl Next I opened a CMD Shell Window from the Microsoft Windows SDK v7.0 menu. I Navigated to the above directory were the WSDL file is and typed:

wsutil * This generated the .h and .c file that I then included in my project. Just for fun I decided to build the Project to see if I had any errors. I got these errors:

c:\users\jsanders\documents\visual studio 2008\projects\wwsapitest\wsdl\mywebservice.wsdl.c : fatal error C1853: ‘Debug\WWSAPITest.pch’ precompiled header file is from a previous version of the compiler, or the precompiled header is C++ and you are using it from C (or vice versa)

There are C files in the project now so I turned off precompiled header (under C++ Precompiled Headers) option and did a clean and rebuild of the project. I then got these errors:

MyWebService.wsdl.obj : error LNK2019: unresolved external symbol \_WsCall@32 referenced in function \_WebServiceSoap_HelloWorld@28 MyWebService.wsdl.obj : error LNK2019: unresolved external symbol \_WsCreateServiceProxyFromTemplate@40 referenced in function \_WebServiceSoap_CreateServiceProxy MyWebService.wsdl.obj : error LNK2019: unresolved external symbol \_WsCreateServiceEndpointFromTemplate@60 referenced in function \_WebServiceSoap_CreateServiceEndpoint

I Included WebServices.lib in the input libraries in the Linker options rebuilt and then the project built fine.

Now the complete code listing for your enjoyment (Copy Code):<div style="BACKGROUND-COLOR: #e0e0e0" id=wwsapiwin7code1>

// WWSAPITest.cpp : Defines the entry point for the console application.

#include “stdafx.h”
#include #include “.\wsdl\MyWebService.wsdl.h”

int _tmain(int argc, _TCHAR* argv[]) {

HRESULT hr; WS_ERROR* error; WS_HEAP* heap; WS\_SERVICE\_PROXY* serviceProxy; hr = S_OK; error = NULL; heap = NULL; serviceProxy = NULL;
// Creating error object
hr = WsCreateError(NULL, 0, &error);
if (FAILED(hr)) { wprintf (L“Failed to create Error object\n”); return -1; } // Creating heap handle
hr = WsCreateHeap(10000000, 0, NULL, 0, &heap, error); if (FAILED(hr)) { wprintf (L“Failed to create Heap object\n”); if (heap != NULL) {
 WsFreeHeap(heap); heap = NULL; }
 if (error != NULL) { WsFreeError(error); error = NULL; } return -1; }
WS\_HTTP\_BINDING_TEMPLATE templateValue = {}; hr=WebServiceSoap12_CreateServiceProxy( &templateValue, NULL, 0, &serviceProxy, error);
if (FAILED(hr)) { WsFreeHeap(heap); WsFreeError(error); return -1; }

WS_ENDPOINT_ADDRESS address = {};
WS_STRING Url = WS_STRING_VALUE(L“http://jsandersrocks.members.winisp.net/WebServiceTest/WebService.asmx”);

address.url = Url;

hr = WsOpenServiceProxy(serviceProxy, &address, NULL, error);
if (FAILED(hr)) { WsFreeServiceProxy(serviceProxy); WsFreeHeap(heap); WsFreeError(error); return -1; } WCHAR *aResult = NULL; hr= WebServiceSoap12_HelloWorld( serviceProxy, &aResult, heap, NULL, 0,NULL, error); if (SUCCEEDED(hr)) { wprintf(L“%s\n”, aResult); }
else { wprintf(L“failed\n”); } 
if (serviceProxy != NULL) { WsCloseServiceProxy(serviceProxy, NULL, error); WsFreeServiceProxy(serviceProxy); serviceProxy = NULL; } if (heap != NULL) { WsFreeHeap(heap); heap = NULL; } if (error != NULL) { WsFreeError(error); error = NULL; } return 0;

}</div> This console app ran and returned the expected ‘Hello World’! Let me know if you found this useful!

<< Go Back

Jeff Sanders Technical Blog

I am a Microsoft employee that has worked on all aspects of the Web Stack for a long time. I hope these blogs are useful to you! Use this information at your own risk.

Windows Web Services Api Client Code Walkthrough On Windows 7