Please wait..

padvou · Mar 10, 2013

Hi everybody.
When there's a time consuming query that selects data to fill a listview how can I inform the user to wait until they are finished?
I 've tried putting progressdialog show before the commad that runs the query, but it ...doesn't show
Maybe because the main thread is too busy? I don't know...
Any suggestions, please?

DouglasNYoung · Mar 10, 2013

Padvou,
I think you are looking for

B4X:

ProgressDialogShow (Text As String)

cheers,
Douglas

padvou · Mar 10, 2013

That is correct. That is exactly what I used, but it's not showing.

thedesolatesoul · Mar 10, 2013

Add DoEvents after ProgressDialogShow.

Informatix · Mar 10, 2013

padvou said:
Hi everybody.
When there's a time consuming query that selects data to fill a listview how can I inform the user to wait until they are finished?
I 've tried putting progressdialog show before the commad that runs the query, but it ...doesn't show
Maybe because the main thread is too busy? I don't know...
Any suggestions, please?

Look at the Demo_WordDBTable2.bas of UltimateListView (Sort_Data function). It shows a rotating circle while the data are sorted.
This code doesn't use DoEvents and thus is more B4A compliant.

padvou · Mar 10, 2013

Informatix said:
Look at the Demo_WordDBTable2.bas of UltimateListView (Sort_Data function). It shows a rotating circle while the data are sorted.
This code doesn't use DoEvents and thus is more B4A compliant.

CallSubExtended?
Looks like the threading way of running code used in visual studio.

Informatix · Mar 10, 2013

padvou said:
CallSubExtended?
Looks like the threading way of running code used in visual studio.

It's a library provided with ULV in the version 2 folder. It extends CallSub and allows to run a sub asynchronously or/and with any number of parameters or/and with a return value of any type.

padvou · Mar 10, 2013

Thank you. I appreciate it.

Erel · Mar 11, 2013

Note that you can also use the new async queries added to the SQL library.

padvou · Mar 11, 2013

Erel said:
Note that you can also use the new async queries added to the SQL library.

Thank you Erel. I'll try it out.

padvou · Apr 25, 2013

Informatix said:
It's a library provided with ULV in the version 2 folder. It extends CallSub and allows to run a sub asynchronously or/and with any number of parameters or/and with a return value of any type.

Sometimes under unspecified circumstances, the separate process never finishes..
How could it be monitored somehow and killed after, for example, 5 seconds?

yttrium · Apr 25, 2013

padvou said:
Sometimes under unspecified circumstances, the separate process never finishes..
How could it be monitored somehow and killed after, for example, 5 seconds?

A timer to query for progress?

Informatix · Apr 25, 2013

padvou said:
Sometimes under unspecified circumstances, the separate process never finishes..
How could it be monitored somehow and killed after, for example, 5 seconds?

You cannot kill it easily. It has to exit properly. That means you have to add code to handle all error cases.

padvou · Apr 25, 2013

Informatix said:
You cannot kill it easily. It has to exit properly. That means you have to add code to handle all error cases.

That's hard to find, due to not being able to debug seperate threads...

padvou · Apr 25, 2013

padvou said:
That's hard to find, due to not being able to debug seperate threads...

So, back to square 1...
any hints on how to kill it?

Informatix · Apr 25, 2013

padvou said:
That's hard to find, due to not being able to debug seperate threads...

Use the Log() function to trace the execution of your code.

Informatix · Apr 25, 2013

padvou said:
any hints on how to kill it?

It's almost impossible in B4A.

padvou · Jun 3, 2013

Hi again,
to bring up the rather old issue of the sub that has been called using CSE that never exits..
I desperately need some workaround to make it exit even if it has error, or whatever the issue. My app gets stuck with a progressbar and i cannot do anything to kill it, or my app...

Erel · Jun 3, 2013

Is the query slow? You should use async queries instead.

padvou · Jun 3, 2013

Erel said:
Is the query slow? You should use async queries instead.

I think there's something globally wrong..
Do ftp uploads work on separate thread also?

Please wait..

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