Further details/update: Once I get the "Sys.WebForms.PageRequestManagerTimeoutException" error, I can consistentely get it to occur by clicking a button that triggers an async postback. It's as if the session has lost it's connection (note that this happens regardless if I am running against my local development machine (XP/IIS51) or our test server (2003/IIS6)). The very weird thing that is befuddling me is that if I use fiddler to watch the traffic to see what is going on it (the connection) will be magically restored and everything works fine again. There are no server side errors being thrown and JavaScript console in (NS/FireFox) does not show anything that would point me to a resolution.
Eureka!!! I figured out the problem. I have JavaScript methods that are called by my child forms when a user is clicking the "Close/Cancel" button that verify there are no unsaved changes before closing otherwise user is prompted to verify that they want to discard changes or not. If they confirmed that they wanted to close the web form I was simply calling window.close() but was not returning any value from the function which I think was a problem because the Close/Cancel button is located within the update panel (because the image changes depending on the scope of the form (e.g. new or view)) and thus despite closing the window I think the AJAX event lifecycle was being initiated but terminated abnormally because of the form closing. I added a "return false;" in my finally clause for all the functions that are used in the closing of a child web form and lo and behold my parent form no longer breaks (see example function below - added statement is bolded). I hope this solution also works for anyone else having a similar problem:
// Function Name: CloseVisitLog
// Function Purpose: Close the visit log form.
// Author: Michael Jensen
function CloseVisitLog(scope)
{
// put function within try-catch-finally block
try
{
// debug statement - set debug = true to view
if (debug) alert(">>Entered JavaScript:CloseVisitLog");
// declare local variables
var unsavedChanges = GetUnsavedChangesFlag();
if(scope == "new")
{
// make sure the user really wants to cancel
if (confirm("Are you sure you want to cancel creation of this visit log entry?"))
{
// close the window
window.close();
}
else
{
return false;
}
}
else if(scope == "view")
{
// if there are unsaved changes make sure the user really
// wants to close
if(unsavedChanges == "true")
{
if (confirm("There are unsaved changes, are you sure you want to close?"))
{
// close the window
window.close();
}
else
{
return false;
}
}
else
{
// close the window
window.close();
}
}
}
catch(ex)
{
var msg = "JavaScript:CloseVisitLog failed. ";
alert(msg + ex.messsage);
}
finally
{
// debug statement = set debug = true to view
if (debug) alert("<<Exiting JavaScript:CloseVisitLog");
// return false to prevent postback when window is closing
// otherwise parent form AJAX will break
return false;
}
}
initiagroup:
NileshDesh: