Change the default async timeout error message

I can't believe this question hasn't been asked before... How do I change the message that is displayed to the user when an async postback has timed out? I've searched the scriptmanager documentation and tried to handle the asyncpostbackerror or whatever event (which doesn't fire on a timeout), but I can't figure out how to do it. Any hints will be appreciated. Thanks.Hi,

You can add your own error handler as the following code:
function StartAsyncPostBack() {
WebService.set_timeout(2000);
WebService.RunForLongTime(0, Complete, OnError); // call a method with the signature of?RunForLongTime(int);
}
function OnError(result) {// your error handler
alert("error: " + result.get_message());
}

Hope this helps.

Causing postback

I have written some javascript that async calls a webservice every second. If the service returns true, I want to cause a postback, with client script that can be handled on the server and tell a particular update panel to update in the server side handler.

I also wish to construct event arguments on the client to be passed as part of the post back.

How do I do this?

I need to do something similar, and I'm wondering if you could do it by having your page implement the IPostBackEventHandler. This interface requires that you implement a RaisePostBackEvent method. This method takes a string argument, and you could update your updatepanels in this method. Does anyone know if this approach would work?

Thanks,

Nick

hello.

ipostbackeventhandler is not the answer if you need to update updatepanels. what you could do is:

1. use the postbackaction

2. add a hidden dummy button to the updatepanel and force the submit by calling its click method

Nope, dont need to do that. ipostbackeventhandler is the way to go.

I add some javascript to the page via:

Microsoft.Web.UI.ScriptManager.RegisterClientScriptBlock(
this,
this.GetType(),
"UIService_Agent",
string.Format(
"function CheckAgentTimer()" +
"{{" +
"UIService.ShouldInteruptAgent(OnAgentTimerSucceeded,OnAgentTimerFailure);" +
"}}" +
"function OnAgentTimerSucceeded(result)" +
"{{" +
"if(eval(result))" +
"{{" +
"{0};" +
"}}" +
"setTimeout(\"CheckAgentTimer()\",{1});" +
"}}" +
"function OnAgentTimerFailure()" +
"{{" +
"setTimeout(\"CheckAgentTimer()\",60000);" +
"}}" +
"setTimeout(\"CheckAgentTimer()\",10000);",
this.Page.ClientScript.GetPostBackEventReference(this,AgentTasksTimer.AGENT_PROCESS),
this.timerInterval
),
true);

and then I implement the interface ipostbackeventhandler

public void RaisePostBackEvent(string eventArgument)
{
if (eventArgument == AGENT_PROCESS)
{
//Is There Work for the Agent?
if (WorkItemActionRequired != null && IsWorkItemActionRequired())
{
WorkItemActionRequired(this, new WorkItemEventArgs(ResourceReceiverService.GetUserWork(((IUserPrincipal)Context.User).Credentials.UserId, true)));
}
}
}

Messy I know, but bare with me...

You can then request that update panels are updated on the server i.e. myUpdatePanel.Update

This works!

Luis Abreu:

hello.

ipostbackeventhandler is not the answer if you need to update updatepanels. what you could do is:

1. use the postbackaction

2. add a hidden dummy button to the updatepanel and force the submit by calling its click method

How do you call the click method on a hidden dummy button?

hello.

you must get ?a refernce for the html control and call its click method:

$get("your_button_client_side_id").click();

But will this cause a partial or full post back?

Thanks,

Nick

hello.

it depend: if it's an asp.net button and it's placed inside an updatepanel (or if it's outside the updatepanel but it's configured as a trigger) you'll get a partial postback.

That might do the trick then. Right now I have implemented IPostBackHandler, but it causes a full post-back. I just want to do a partial. How do I make the button invisible, set Visible to false, or set visible to hidden in the button style?

Thanks,

Nick

hello.

it depend: if it's an asp.net button and it's placed inside an updatepanel (or if it's outside the updatepanel but it's configured as a trigger) you'll get a partial postback.
hello again.
well, i'd just add syle="display:none" in the asp.net button declaration.

This will also allow me to put code server-side?

Thanks,

Nick

Causing Async Postback after closing ModalPopup

Hey,

Im trying to make use of the ModalPopupExtender in order to allow the user to input some information and then have an UpdatePanel async postback to update with this new information. The key here would therefore be to Update the Panel right after closing the ModalPopup. This is where Im having some troubles. No matter what I cant get the UpdatePanel to postback after clicking Ok from the ModalPopup. As of right now, once you click Ok from the Modal, you have to hit refresh in order to see the results of the info... which kinda defeats the purpose of AJAX.

Thanks in advance for help!

Hi,

You can first add an invisible button on the form, and set it as the triggerfor the UpdatePanel.

Then, add a OnOkScript to the modalPopupExtender. In the script, call click on the invisible button. Like this: $get("id of the invisible button").click

So, whenever the modalPopup is closed via clicking on ok button, the UpdatePanel is able to update.

Hope this helps, and please feel free to let me know if there is any problem.

Catch async trigger in page_load

Hi guys,

I've recently started experiencing with the ASP.NET AJAX toolkit and I'm wondering if it's possible to catch the async trigger in the page_load and what object caused it?

This is in the situation that I have a lot of database accesses in the app. I want to be able to trigger really specific calls to the DB depending on if it's a postback, async call, etc. Not just a generic thing that's executed in the !isPostback section, causing the application to fetch a lot of data for a small AJAX call.

Thanks,

Ben.

if (ScriptManager1.IsInAsyncPostBack)if (ScriptManager1.AsyncPostBackSourceElementID == yourControl.ID){ // do your thang }

Awesome, thanks!

Ben.