[CLOSED] Treat connection error

[josegarcia]

Is there any way to treat connection errors so that i can, for example, redirect the user to login screen and show a treated message saying there was a connection problem? I mean, user loses connection to the internet and does something that calls a directmethod. An untreated exception is shown. How to trat this?

Is there a way to do it globally for all directmethods in application?

[Daniil]

Hi @josegarcia,

This should work.

<ext:ResourceManager runat="server">
    <Listeners>
        <AjaxRequestException Handler="..." />
    </Listeners>
</ext:ResourceManager>

[josegarcia]

It kinda worked, but sometimes the window with the untreated message is still shown (Request failure):



How to hide that?

[Daniil]

If you don't want a default failure window to be appeared, please return false from an AjaxRequestException listener or set a ResourceManager's ShowWarningOnAjaxFailure to false.

[josegarcia]

One more thing... Sometimes the icon is not shown when i show a custom message on connection error, like:

            var function = String.Format(
                "Ext.Msg.show({{ title: '{1}', msg: '{0}', icon: Ext.MessageBox.ERROR, buttons: Ext.Msg.OK }}); return false;"
                , ViewConfigurationServiceResource.ProblemaDeConexaoMensagem, ViewConfigurationServiceResource.ProblemaDeConexaoTitulo
                );
            ResourceManager.GetInstance(HttpContext.Current).ShowWarningOnAjaxFailure = false;

            ResourceManager.GetInstance(HttpContext.Current).Listeners.AjaxRequestException.Handler += function;

I guess it's because the connection is down, so the icon can't be loaded, right? Is there a way to preload the icon?

[Daniil]

I guess it's because the connection is down, so the icon can't be loaded, right?

Hard to say.a

Is there a way to preload the icon?

You can run this JavaScript code.

new Image().src = "image url";

[josegarcia]

And what is the "image url" for Ext.MessageBox.ERROR?

[Daniil]

Then that icon appears, inspect HTML elements using a browser's developer tools. You should be able to see the URL.