Utilizing the Page Method Feature in ASP.Net Web Services

I've been attempting to access a page method from a centralized module.

  • My first attempt was placing it in a master page, but that did not yield the desired result

  • Next, I tried incorporating it into a web service and followed these steps:

    1. Added its path to the script manager located in the master page

    2. Included a web service reference in the project

    3. Configured the web.config file for the page methods

However, this approach also failed as I kept receiving an error stating "PageMethods is not defined" (JavaScript error)

  • My next strategy was to try accessing the page methods via http request from JavaScript, but all I got was a server error response (500)

What am I overlooking?

javascriptasp.netajax

Answer №1

I tried out the steps in example #2 from this source and found success (although the samples seem to be broken): http://www.asp.net/Ajax/Documentation/Live/tutorials/ExposingWebServicesToAJAXTutorial.aspx

These are the actions I followed: 1) created a basic .asmx web service with 'HelloWorld' method 2) added the attribute [ScriptService] to the 'HelloWorld' method (and any methods in the web service that I wanted to call from my page script) 3) included a ScriptManager on the page, referencing the web service, and setting InlineScript="true" 4) called the page from Javascript like this:

ServiceNamespace.ServiceClass.Method(parameters, callback);
function callback(result)
{
    alert(result);
}

If you're receiving a 500 error, it indicates there might be an issue with your web service. My suggestion would be to start by checking if you can successfully open your web service URL in a browser and invoke its methods.

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