How to effectively manage errors in WCF using JavaScript?

Does anyone have instructions on using callback functions in a WCF Service that is accessible to Javascript? I am particularly interested in retrieving information from the FailureCallback to understand why my method is not working as expected.

To clarify, here is the JavaScript code I currently have:

function getWCF_RowNumber(parentID) {
    logEvent("<strong>Busy</strong>: Please wait while lower grid is refreshed...");                  
    var service = new ajaxTest();
    service.Vendor_GetParentRowNumber(parentID, moveBottomGridToRow, wcfFailCallback, null);
}

I need guidance on how to properly implement the wcfFailCallback function. Can anyone help with this?

javascriptajaxwcfmicrosoft-ajaxwcf-callbacks

Answer №1

If you're utilizing ASP.NET AJAX and not jQuery or any other 3rd party JavaScript library, the failure callback in ASP.NET AJAX requires a single parameter. According to MSDN, a typical failure callback would appear like this:

function wcfFailCallback(error)
{
    var stackTrace = error.get_stackTrace();
    var message = error.get_message();
    var statusCode = error.get_statusCode();
    var exceptionType = error.get_exceptionType();
    var timedout = error.get_timedOut();

    // Display the error.    
    var RsltElem = 
        document.getElementById("Results");
    RsltElem.innerHTML = 
        "Stack Trace: " +  stackTrace + "<br/>" +
        "Service Error: " + message + "<br/>" +
        "Status Code: " + statusCode + "<br/>" +
        "Exception Type: " + exceptionType + "<br/>" +
        "Timedout: " + timedout;
}

The wcfFailCallback function accepts an error parameter that contains various properties providing information about the failure.

You can find the complete article on MSDN here. It elaborates on how to connect WCF services to ASP.NET AJAX clients.

I trust this clarifies things for you! If you have further queries or if I misinterpreted your question, please let me know so I can update my response accordingly.

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