How to show server side error while saving appointment

[Ez Bala]

I am using custom advanced form to maintain appointment. The database thorows an exception if the validation fails. The validation is complex that I cannot bring it to the client side. Currently the application shows "Server error in '/<app>' Application" with the error message returned by the database. How can I catch the exception and show in RadAlert? Any help is appreciated.

Thanks, E.Z.

[Andrew]

I would really love to know the answer to this as well. I am in the same boat as you!!!!
Not sure if I can change fields in AppointmentToInsert and AppointmentToUpdate in my datasource, but I was thinking of creating a custom attribute called Error, and if after Appointment Insert/Updated, this field is populated, then do a RadAlert with that message (Not forgetting to clear the message in javascript on the client side). However, I don't see a client side event called "OnClientAppointmentInserted" to be called after the appointment is inserted. So that may not be feasible.

[Andrew]

I figured out a solution to this problem:

In the RadScriptManager in my scheduler control page I code the following:

    <telerik:RadScriptManager runat="server" ID="RadScriptManager1">
        <scripts>
            <asp:ScriptReference Path="/Scripts/AdvancedForm.js" />
            <asp:ScriptReference Path="/Scripts/ErrorHandler.js" />
        </scripts>
    </telerik:RadScriptManager>

ErrorHandler.js has my error handler script which is:

Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);

function EndRequestHandler(sender, args) {
    if (args.get_error() != undefined) {
        var msg = args.get_error().message;
        alert(msg.substring(msg.indexOf(":", 0) + 1));
        args.set_errorHandled(true);
    }
}

To validate on the server side, I setup the RadScheduler with:

            OnAppointmentInsert="RadScheduler1_OnAppointmentInsert"
            OnAppointmentUpdate="RadScheduler1_OnAppointmentUpdate"

Then in my routines RadScheduler1_OnAppointmentInsert and RadScheduler_OnAppointmentUpdate, when I throw an exception it is caught by my EndRequestHander, and an alert box displays the error message (without the class description of the exception). 

Hhope this helps someone.

[Peali]

Need more explanation and demo application on the server side error handling from front end.

[Plamen]

Hi Peali,

You can throw some custom exception in the GetAppointments of MyDbSchedulerProvider as it is done in the attached project.

If you are trying to achieve something different please elaborate a little bit to we can be more helpful.

Greetings,
Plamen Zdravkov
the Telerik team