StrataFrame Forum » .NET Forums » General .NET Discussion » Command button Click event firing twice when user double click it.

Command button Click event firing twice when user double click it.

Edhy Rijo — Fri, 19 Nov 2010 11:34:50 GMT

Hi guys,

I am having a situation where some users are double clicking a command button and its Click() event is being fired twice, is there a way to prevent this?

I have done some research in Google but could not find an easy solution, other than creating a timer to handle the click.

Thanks!

RE: Command button Click event firing twice when user double click it.

Edhy Rijo — Fri, 19 Nov 2010 11:34:50 GMT

Thanks Greg, very good information about those events.

RE: Command button Click event firing twice when user double click it.

Greg McGuffey — Fri, 19 Nov 2010 09:30:34 GMT

Here's some info on how the click/double-click events play together: [url=http://msdn.microsoft.com/en-us/library/system.windows.forms.control.doubleclick.aspx]Control.DoubleClick Event[/url]. This supports the advice to disable further clicks until the process is completed.

RE: Command button Click event firing twice when user double click it.

Ivan George Borges — Fri, 19 Nov 2010 09:07:21 GMT

Now that I gave it some more thinking, I do have some buttons that start long processing that I disable as soon as they get clicked... and not only them, many of the form controls that are waiting for a click, so the user won't get a chance to mess it up.

RE: Command button Click event firing twice when user double click it.

Edhy Rijo — Fri, 19 Nov 2010 08:19:19 GMT

[quote][b]Russell Scott Brown (11/19/2010)[/b][hr]I know if FoxPro I often run into problems with people, especially older ones, double-clicking on command buttons like crazy for some reason. Also have the issue where they do 2 single-clicks instead of 1 double-click because they are mouse challenged.[/quote]
Hi Russell,

That is good to know, but I did reproduced the issue with a very fast double click and was surprised to see my process running twice.

RE: Command button Click event firing twice when user double click it.

Russell Scott Brown — Fri, 19 Nov 2010 08:14:21 GMT

Hello Edhy.

I know if FoxPro I often run into problems with people, especially older ones, double-clicking on command buttons like crazy for some reason. Also have the issue where they do 2 single-clicks instead of 1 double-click because they are mouse challenged.

Anyway, this workaround is good to know. Thanks

RE: Command button Click event firing twice when user double click it.

Edhy Rijo — Fri, 19 Nov 2010 07:38:02 GMT

Well, you should have seen my face when I got the call from the user reporting that my process was running twice :crying:

At least I have only get one call on this specific process, so for now fixing this button will be enough. Hmmm, never got that complaint using Visual FoxPro :w00t: but did get others :satisfied:

RE: Command button Click event firing twice when user double click it.

Ivan George Borges — Fri, 19 Nov 2010 04:27:18 GMT

Nope, never thought of it. But it does make sense it runs twice, since the user clicked the thing twice.

I think we could put a message "Can you please give the application some time to do its job?!" to the user, and of course, use the Localization and Messaging Editor to create a key to this message, so we do it in all languages possible. :D

RE: Command button Click event firing twice when user double click it.

Edhy Rijo — Thu, 18 Nov 2010 19:16:25 GMT

Hi Ivan,

Thanks for the prompt response. Yes that does the trick even though it is weird that a double click action would be registered twice. This mean that now I would have to re-test all my buttons or create a subclass to do the enable/disable trick.

Is this also happening to you?

RE: Command button Click event firing twice when user double click it.

Ivan George Borges — Thu, 18 Nov 2010 19:07:49 GMT

Hi Edhy.

Would disable the button once it enters the Click event work? And then Enable it back once you finish everything you want to do inside it?