spacer
Yehuda Shiran December 5, 2001
Calling the EchoVoid Web Service
Tips: December 2001

Yehuda Shiran, Ph.D.
Doc JavaScript

Developer News
OpenOffice 3.2 Lands Amid Critical Changes
Red Hat, IBM Firmly in KVM Virtualization Camp
Red Hat Talks Up Open Source Cloud Plans

 When calling a Web service, you need to pay close attention to its expected input data type. Some Web services do not require any input at all. The echoVoid method of the echoService Web service is one of these. The following call will be successful:

iCallID = webServiceCallerBody.echo.callService(handleResult, "echoVoid");
And will return null.

Learn more about Web services in Column 96 (Web services, Part I: Introduction) and Column 97 (Web Services, Part II: Calling Service Methods).

Here is an HTML file that demonstrates calling a Web service. Copy it to your local disk, together with the WebService behavior (webservice.htc):

<HTML>
<BODY ID="webServiceCallerBody" onload="loadService()" 
  STYLE="behavior:url(webservice.htc);background-color:peachpuff;color:brown;font-size:18">
<SCRIPT LANGUAGE="JavaScript">
<!--
function loadService() {
	webServiceCallerBody.onserviceavailable = enableServiceCall;  //Used for the synchronous call.
	webServiceCallerBody.useService(
	  "http://soap.bluestone.com:80/interop/EchoService/EchoService.wsdl","echo");
}
function callAsynch() {
	iCallID = webServiceCallerBody.echo.callService(
	  handleResult, "echoVoid");
}
function callSynch() {
	var co = webServiceCallerBody.createCallOptions();
	co.funcName = "echoVoid";
	co.async = false;
	var oResult = webServiceCallerBody.echo.callService(co);
	handleResult(oResult);
}

function enableServiceCall() {
	b2.disabled = false;
}

function handleResult(res) {
  if (!res.error) {
    alert("Successful call. Result is " + res.value);
  }
  else {
    alert("Unsuccessful call. Error is " + res.errorDetail.string);
  }
}
// -->
</SCRIPT>
<HR><H4>Calls to an echo service</H4><HR><BR><BR>

<BUTTON ID="b1" onclick="callAsynch()">Call Asynchronously</BUTTON><BR><BR>
<BUTTON ID="b2" onclick="callSynch()" disabled>Call Synchronously</BUTTON><BR><BR><BR><BR>

<A HREF="http://www.xmethods.net/ilab/">Interop Testing Site</A>

</BODY>
</HTML>

People who read this tip also read these tips:

Look for similar tips by subject:


The Network for Technology Professionals

Search:

About Internet.com

Legal Notices, Licensing, Permissions, Privacy Policy.
Advertise | Newsletters | E-mail Offers

Solutions

Whitepapers and eBooks

Article: Adobe Helps PHP Developers Create Rich Internet Applications
Case Study: Microsoft IT Strengthens Security with Data Loss Prevention Solution
Article: Reduce Your Infrastructure Costs with Microsoft System Center
Intel Brief: Five-Star IT Support--Intel Core 2 processor with vPro Delivers ROI of 524 Percent
Article: Security Enhancements Abound in Windows Server 2008
Article: Enterprise Social Computing with Microsoft SharePoint 2010
Intel Whitepaper: Implementing Intel vPro Technology to Drive Down Client Management Costs
 Microsoft Whitepaper: Improve Communications and Collaboration
Intel Article: Intel Core i5 vPro Brings Intelligence to the Processor
Microsoft Personalized Whitepapers and Resources for You
Microsoft Articles: Visual Studio 2010
Adobe Article: Java Developers Finding a Home at Adobe Flex
Microsoft Whitepaper: Make Better Decisions - SQL Server 2008 Business Intelligence.
MORE WHITEPAPERS, EBOOKS, AND ARTICLES

Webcasts

Video: How System Center Helps Reduce IT Costs
IBM Cloud Computing for Developers Virtual Event, April 6-8
Microsoft Video: OCS and Exchange: Platform Futures
MORE WEBCASTS, PODCASTS, AND VIDEOS

Downloads and eKits

HP PartnerONE | SolutionsINFINITE Visit us at hp.com/partners/us
Iron Speed Designer Application Generator
 MORE DOWNLOADS, EKITS, AND FREE TRIALS

Tutorials and Demos

Learn Unified Communications
Learn SQL Server 2008
Learn Windows Server 2008 R2
Internet.com Hot List: Get the Inside Scoop on IT and Developer Products
Learn Forefront
 Learn System Center
All About Botnets
Learn SharePoint
MORE TUTORIALS, DEMOS AND STEP-BY-STEP GUIDES
webref The latest from WebReference.com Browse >
Search Engine Optimization: Selecting and Embedding Keywords · Are Google's Language Translation Web Services Ready for Prime Time? · Installing and Using Meeplace, the Business Review CMS
Sitemap · Experts · Tools · Services · Email a Colleague · Contact FREE Newsletters > 
 The latest from internet.com
IBM DB2 10 for z/OS: Justifying the Upgrade · Living La Vida Colo: Choosing the Right Colocation Facility · FTC Concerns over Social Media Privacy Linger