ASP.NET MVC - AjaxContext is a powerful feature provided by the

I recently attempted to delve into the AjaxContext utilized by ASP.NET-MVC in scenarios such as Ajax Actionlinks and their clientside functions like onSuccess and onComplete. However, I must admit that I found it quite confusing... Is there any documentation available to explain this further?

Can anyone offer guidance on how to access the 'target' or 'srcElement' (e.target or window.event.srcElement) within a onSuccess or onComplete javascript event?

<%=Ajax.ActionLink(
"LinkText", "Action", New With {.Controller = "ControllerName"}, 
New AjaxOptions With {
    .UpdateTargetId = "divElement", 
    .OnSuccess = "function(ajaxContext) {console.log(ajaxContext);}"
}) %>

This code snippet produces the following HTML:

<a 
    href="/Popout/ApplicationCodePopout"
    onclick="Sys.Mvc.AsyncHyperlink.handleClick(
        this, new Sys.UI.DomEvent(event), 
        { 
            insertionMode: Sys.Mvc.InsertionMode.replace, 
            updateTargetId: 'divElement', 
            onSuccess: Function.createDelegate(this, 
                function(ajaxContext) {console.log(ajaxContext);}
            )
        }
    );"
>LinkText</a>

Answer №1

If you want to modify the onSuccess method, consider using the following code snippet:

<%=Ajax.ActionLink(
"LinkText", "Action", New With {.Controller = "ControllerName"}, 
New AjaxOptions With {
    .UpdateTargetId = "divElement", 
    .OnSuccess = "function(ajaxContext) {debugger;}"
}) %>

(Take note of the addition of the debugger keyword)

You can then debug this code in VS2008 (assuming you are using IE. If you prefer Firefox, install Firebug as recommended by Jake). Use the quick watch window in VS or a similar tool in Firebug to examine the object and its properties/methods.

For additional documentation, refer to this link to review code comments, and check out this article for more information.

Answer №2

Make sure to have Firebug installed, if you haven't already. Start using console.log in your code to discover the properties and functions of each object. Try typing console.log(document) in the Console window's textbox (next to >>>). Click on the links in the console to explore and see what properties and functions are available for that object.

Answer №3

If you're looking to dive into the world of jQuery, I highly recommend checking out a book called jQuery in Action. It's truly one of the best tech books I've come across! Once you go through it, you'll feel confident enough to write your own jQuery code without relying on server side wrapper libraries that generate javascript for you :)

Don't miss out on this gem!

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