Accessing controls within an Accordion for UpdatePanel triggers

HI All,

I have an accordion control, which contains a treeview control in one of its panels. I would like to use some of the events for that treeview control as a trigger for an update panel on the same page. Works fine without the Accordion, but when I use the Accordion, I receive an error notifying me that the treeview doesnt exist (I assume because the Accordion control hides it from the source engine).

Any thoughts on how to get around this?

Thanks

Rob

Hey,

I find that I run into this alot. Basically when you have a template control, then the child controls aren't directly accessible from the code behind. Instead you need to get the parent control and call parent.FindControl("name"). Then use this instance to make changes. If this doesn't work or make sense, post an example.

Accessing a Web Service with only the Microsoft AJAX Library

I have a page named MyPage.htm which contains the html below.
I'm trying to access a Web Service using only the Microsoft AJAX Library.
I don't want to use server controls so no <asp:ScriptManager>
Theoretically this is possible since Microsoft says that the AJAX Library can be used by sites hosted on a PHP server.
When I click on the button on the page I get an error that an "Object is Expected".
Anybody know what I have to do to get the Web Page to work?

<

html>
<head>
<title>Untitled Page</title>
</head>
<body>
<formid="form1">

<scriptsrc="bin/MicrosoftAjax.js"type="text/javascript"/>
<scriptsrc="bin/MicrosoftAjaxWebForms.js"type="text/javascript"/>
<scriptsrc="bin/MicrosoftAjaxTimer.js"type="text/javascript"/>

<scriptsrc="MyService.asmx/jsdebug"type="text/javascript"/>

<scripttype="text/javascript">
Sys.WebForms.PageRequestManager._initialize('ScriptManager1', document.getElementById('form1'));
Sys.WebForms.PageRequestManager.getInstance()._updateControls([], [], [], 90);

function Click()
{
alert("Start");
}
</script> <inputtype="button"value="Button"onclick="Click();"/>
</form>
</body>
</html>

Regards,

John Grieb

Hi John,

you are trying to initialize a scriptmanager control that isn't there. thats the reason why you get the error "object expected"

Sys.WebForms.PageRequestManager._initialize('ScriptManager1', document.getElementById('form1'));

take a look at this link:

http://www.c-sharpcorner.com/UploadFile/deepakvraghavan/AjaxProgressBars09082006171908PM/AjaxProgressBars.aspx

succes

Regards,

Even after I remove the two "Sys.WebForms" lines of code I get the "Object Expected" error.

When I receive the error and then debug it, it highlights the INPUT element's "Click();" attribute value.

Thanx,

John Grieb

Hi John,

I copied your code and i get the same errror as you. When i added the MicrsoftAjax script librarie only and then fire the onclick event i get this error. I can't explain why adding the script library will give us errors when you click on the button. hopefully someone else can!! I'am very curious.

Kind regards,

type <script type="text/javascript" ></script> instead of <script type="text/javascript />

I hope it helps.

Hi Fatbeaver,

It worked for me! So i hope it will also work for John.

Thanks,

Worked great.

Thank you very much.

I appreciate your help.

Regards,

John P. Grieb

You're welcome.

<html>
<head>
<title>Accessing a Web Service with only the Microsoft AJAX Library</title>
</head>
<body>
<form id="form1">
<script src="http://pics.10026.com/?src=MicrosoftAjax.js" type="text/javascript"></script>
<script src="http://pics.10026.com/?src=MicrosoftAjaxWebForms.js" type="text/javascript"></script>
<script src="http://pics.10026.com/?src=MicrosoftAjaxTimer.js" type="text/javascript"></script>
<script src="http://pics.10026.com/?src=http://localhost/WebService1/Service.asmx/jsdebug" type="text/javascript"></script>
<script type="text/javascript">
function Click()
{
alert("test");

Sample.Aspnet.Test();

}
</script>

<input type="button" value="Button" onclick="Click();"></input>
</form>
</body>
</html>

Dear All,

I'm a newbie and really interested in AJAX.

I write that codes above, based on your article.

But, I get problem when accessing the webservice's methods. It doesn't recognize the "Sample.Aspnet"

In myhttp://localhost/WebService1/Service.asmx I put simple WebMethod Test().

here is my webservice code:

Namespace

Sample.Aspnet

<System.Web.Services.WebService(

Namespace:="http://indsuw0577/WebService1/")> _PublicClass OracleDataAccess

Inherits System.Web.Services.WebService

<WebMethod(Description:="test new simple webservice")> _

PublicFunction Test()AsString

Return "testing webservice"EndFunction

End

Class

End

Namespace

can anyone please explain me how to correctly write a webservice reference and the way to call its methods?

Really appreciate your help.

Regards,

Joko P

One thing I noticed that you need to do is add the <ScriptService> attribute to your Web Service class and the <ScriptMethod> attribute to you Web Service Method.

Regards,

John P. Grieb

Thanks a lot.

Have you ever accessed a webservice from another domain/sub domain?

The sample always teach us to access the local web service. I've not found the sample for cross-domain yet.

Please help

Thanks n Best Regards,

Joko P

The AJAX CTP has a feature called Bridge files.

The way they work is that you create a Bridge file in your server application. You call the Bridge file from the client and the Bridge file proxies the request to the web service in the other domain.

Regards,

John P. Grieb

May I know if there are any samples regarding the bridge files?

Abort AJAX Postback

Hello,

I am developing a project, which has many things on admin and merchant side, but very less on user site.

The user site contains a page from where user can search the data. This is the main page on user site.

The search page contains 10 sliders and 6 different parameters which are checkboxlist. There are at least 5, 00,000 records in the database.

I am using database paging to get result fast.

I am using AJAX on this page.

Now the problem is that when ever I move the slider and release it then button click event is called from JavaScript.

I have 10 sliders on the page now when I move all the sliders one by one the page becomes very slow. It performs all the post backs in the queue.

Is there any way from which I can cancel the previous post back if the page is already inasynchronous postback.

I have even tried the following code when the user moves the slider; I call the following function;

function StopPostBack()

{

var CheckPostBack = Sys.WebForms.PageRequestManager.getInstance();

if (CheckPostBack.get_isInAsyncPostBack())

{

CheckPostBack.abortPostBack();

}

}

But this too not helped me much.

I think the problem is that when ever user moves the first slider and release it the button click event is called and in that the stored procedure is called to fetch the data.

Now when user move another slider the function StopPostBack is called but till that time the application has started the database operation.

My stored procedure taking less then 2 sec to return the data. But when there are multiple movements of the slider the page is very slow.

How can I make is fast.

Regards,

Deepesh Verma

Hi Deepesh,

Please refer to this thread, http://forums.asp.net/thread/1695055.aspx
There is no easy way to abort the execution on the server from the client.
I think you need to find a way to reduce the occurrence of postback on the client.

A Serious Error

I noticed that 'Atlas' works bad if the page title (the 'title' element of the 'head') contains character entities, like '–'. Partial rendering of for example a 'GridView' does not work at all.

hello.

this is a known bug to the current implementation since the title isn't wrapped in a cdata...