Callback Scope on the client

I've started to play around w/ some of the basic Atlas features, mainly calling a web service from the client. One thing I noticed is that scope is lost during the asynchronous call to the server. If my javascript caller & callback method are part of an class, I've no way of telling Atlas to invoke the callback method w/ a specific object's scope.

Is this possible to do?

Cheers,
BobbyYou have a userContext parameter which you can pass as part of yourasynchronous call, that is what you can use to get back to the contextof your call, i.e. you can pass the object who's scope you want back aspart of the call...

Hope that helps,
-Hao
As I understood it, the userContext serves as a holder for contextual data that can be used inside the handler as an object - scope is still lost. Consider the following js class example:

TestClass = function(prop1)
{
this.propertyOne = prop1;

this.test = function()
{
MyCallbackServiceClass.Test({onMethodComplete: this.testCallback, userContext: this});
}

this.testCallback = function(result, user)
{
alert(this.propertyOne);
}
};

var t = new TestClass("This should persist before and after callback");
t.test();

When propertyOne is alerted in the testCallback method, it will be undefined because the scope is not preserved. I don't want the object as a parameter - I want to be operating within that object.
Mike Harder from the ASP.NET team, being the top-notch guy he is, answered this question for me. The scope is maintained by using a delegate.

CSharper.Net.CallbackService.Test({ onMethodComplete: Function.createDelegate(this, this.testCallback), userContext: this });

CalendarExtender with ImageButton

Hi,

today i play around the sample of the CalendarExtender from the live demo page,

the third example is using the CalendarExtender with the imageButton,

when i click on the imageButton at the first time, the calendar is popup, then i simple select the date, click on it, the date was selected, fine.

but, when i trying to open the calendar popup, and choose nothing but click again on the imageButton,

the page was fully postback and my previous selected date on the textbox was gone.

at the end i got to solve this with no using the image button but normal image tag.

is that consider a bug?

or i missed something?

I have also discovered that the second click on the image button will force a postback.

I fixed it in the CalendarBehavior.js file like this:

In the _button_onclick function there is an 'if' statment thus

if (!this._isOpen) {
e.preventDefault();
e.stopPropagation();
if (this._enabled)
this.show();
} else {
this.hide();
}

I moved the event function invocations out of the 'if' statement like this:

e.preventDefault();
e.stopPropagation();

if (!this._isOpen) {
if (this._enabled)
this.show();
} else {
this.hide();
}

This seems to work for me on both IE and Firefox. Note that I haven't tested it fully though.