Solved

How to avoid javascript error 'args is not defined' in ajax autosave implementation?

Posted on 2011-09-13
6
631 Views
Last Modified: 2012-05-12
I have attempted to implement autosave on a .net application using an ajax update panel. I am having difficulty with preventing / capturing errors. My initial attempt to capture errors involved that addition of  including  Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endRequest);
I then coded the error capture withing the endRequest function. That resulted in a Sys is not defined error. I found this posting: http://encosia.com/updated-your-webconfig-but-sys-is-still-undefined/ which led me to my latest implementation which has the sys handling in a separate script file. Now I receive the error 'args is not defined'. I'm not sure how to reference the args  to enable the ajax call. So you can see I am now out of my depth. I have included the code from my .aspx file and js file below. Your help greatly appreciated
Verdy SysInstance.js
.aspx page
SCRIPT REFERENCE:
	<asp:ScriptManager ID="SMan" runat="server" >
	<Scripts>
		<asp:ScriptReference Path="js/SysInstance.js" />
	</Scripts>
</asp:ScriptManager>

UPDATEPANEL CONTROL:
	    <asp:UpdatePanel ID="Deneme" runat="server" UpdateMode="Conditional">
        <Triggers>
            <asp:AsyncPostBackTrigger ControlID="TimerAutoSave" EventName="Tick" />
        </Triggers>
        <ContentTemplate>
            <asp:HiddenField ID="hdnUserID" runat="server" Value="" />
            <asp:HiddenField ID="hdnLanguageCode" runat="server" Value="" />
            <asp:HiddenField ID="hdnTempDocID" runat="server" Value="" />
            <asp:HiddenField ID="hdnServerName" runat="server" Value="" />
            <asp:HiddenField ID="hdnServerPort" runat="server" Value="" />
            <asp:HiddenField ID="hdnVirtualDirectoryName" runat="server" Value="" />
            <asp:HiddenField ID="hdnPostASPX" runat="server" Value="" />
        </ContentTemplate>
    </asp:UpdatePanel>
    <asp:Timer ID="TimerAutoSave" runat="server" Interval="5000" OnTick="TimerAutoSave_Tick">
    </asp:Timer>

Open in new window

0
Comment
Question by:verdante
  • 3
  • 3
6 Comments
 
LVL 16

Expert Comment

by:SriVaddadi
ID: 36533434
check if this solves your problem

Sys.Application.add_init(AppInit);

function AppInit() {
    Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(beginRequest);
    Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endRequest);
}

function beginRequest(sender,args) {
    if (args.get_error() != undefined) {
        //$get('Error').style.visibility = "visible"; // Let the framework know that the error is handled, // so it doesn't throw the JavaScript alert.
        $get('Error').style.visibility = "hidden"; // Let the framework know that the error is handled, // so it doesn't throw the JavaScript alert.
        args.set_errorHandled(true);
    }
    prm._scrollPosition = null;
}

function endRequest(sender, args) { // Check to see if there's an error on this request.
    if (args.get_error() != undefined)
    //if ($get('Error').style.visibility == "visible")
    //    CloseError();
    {
        $get('Error').style.visibility = "hidden"; // Let the framework know that the error is handled, // so it doesn't throw the JavaScript alert.
        args.set_errorHandled(true);
    }
}
0
 

Author Comment

by:verdante
ID: 36533516
Thanks SriVaddadi. I get a new error now:

args.get_error is not a function

cheers

Verdy
0
 
LVL 16

Expert Comment

by:SriVaddadi
ID: 36533643
BeginRequestEventArgs does not have have get_error method. you have remove the code referring get_error in beginRequest

0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:verdante
ID: 36533882
Thanks. Sorry this is my code when I remove the comments. I thought the get_error() method was a property of the args parameter. Can you please advise how I can modify this code to make sure the get_error method is included:

function beginRequest(sender, args) {
    if (args.get_error() != undefined) {
        $get('Error').style.visibility = "hidden";
        args.set_errorHandled(true);
    }
    prm._scrollPosition = null;
}


0
 
LVL 16

Accepted Solution

by:
SriVaddadi earned 500 total points
ID: 36536076
Check here for better understanding
http://msdn.microsoft.com/en-us/library/bb383922.aspx

Not sure what you are intending to do but the BeginRequestEventArgs does not give you error object but EndRequestEventArgs does.

It makes sense because you would not have any error for that request even before sending request

You could have the code in endRequest handler. what kind of error info you are looking for?
0
 

Author Closing Comment

by:verdante
ID: 36536388
Thx for that. AS you can see I am out of my depth but you have taught me well. I removed the error handling from the beginrequest and it works nicely.
I'll also check out the link so I have a better understanding

thx again
Verdy
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

jQuery is a JavaScript library that greatly simplifies JavaScript programming. AJAX is an acronym formed from "Asynchronous JavaScript and XML."  AJAX refers to any communication between client and server, when the human client does not observe a…
OverviewThis article demonstrates a simple search form using AJAX. The purpose of the article is to demonstrate how to use the same code to render a page and javascript (JQuery) and AJAX to make subsequent calls to refine the results. The princip…
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

735 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question