how to prevent saving Appointment before i finished some custom logic

[Yi]

because i binding the appointmentsource to DB.before click ok button,i should do some business rule.
how can i do 

[Kalin]

Hi Yi,

What I can suggest you is that you handle the DialogClosing of the ScheduleView. The event is fired when the EditAppointmentDialog is about to close and before the AppointmentSaving is fired. For more information about the ScheduleView events you can check the following article from our online help documentation:
http://www.telerik.com/help/silverlight/radscheduleview-events-overview.html

Hope this helps.

Regards,
Kalin
Telerik

[Yi]

sorry that i have used WCF RIA Services do my logic.
how i use this in this event base on asynchronous operation .

[Kalin]

Hi Yi,

I understand now. What I can suggest you is to extract and modify the default EditAppointmentDialogTemplate and replace the Ok button with custom one bound to a Command in the ViewModel. This way will be able to execute the custom logic in that Command and when completed you can manually confirm the dialog.
The button should look as follows, note that you will also need to pass the button it self as a parameter:

<telerik:RadButton Content="Ok"
                DataContext="{StaticResource ViewModel}"
                Command="{Binding ButtonClick}"
                CommandParameter="{Binding RelativeSource={RelativeSource Self}}" />

 
And the command:

private void OnButtonClick(object obj)
{
    // do custom logic here and confirm the dialog when needed with the command below
    WindowCommands.Confirm.Execute(null, obj as RadButton);
}

As for the custom dialog you can check the following article from our online help documentation:
http://www.telerik.com/help/wpf/radscheduleview-features-custom-dialogs.html

Hope this helps.

Regards,
Kalin
Telerik

[Yi]

can i use it in default theme?

[Kalin]

Hello Yi,

Yes, of course. You just need to extract the default ControlTemplate of the EditAppointmentDialog from the OfficeBlack theme. The needed XAML file is located in the Themes.Implicit folder which is inside of the installation folder of the controls.

If you have any further questions, let us know.

Regards,
Kalin
Telerik

[Yi]

 in this command i found i can't use this datacontext of this dialog.i want to use some properties of creating appointment.like starttime,endtime

[Kalin]

Hello Yi,

What I can suggest you in this case is to pass the Grid which hold the Button as CommandParameter. This way you will have the ViewModel of the Grid as well as the Button which is inside of it (you will to name the Button in this case). The Button in the EditAppointmentDialog ControlTemplate should look like this (I have passed the Grid with name Details as a parameter):

<telerik:RadButton x:Name="CustomButton"
                     Margin="2" MinWidth="84"
                     Content="Ok" DataContext="{StaticResource ViewModel}"
                     Command="{Binding ButtonClick}"
                     CommandParameter="{Binding ElementName=Details}" />

And the Command in the ViewModel should look like shown below:

private void OnButtonClick(object obj)
{
    // Get the AppointmentDialogViewModel
    var grid = obj as Grid;
    var vm = grid.DataContext as AppointmentDialogViewModel;
    // Do the additional logic here
    // ...
    // Confirm the dialog below
    var button = grid.FindName("CustomButton") as RadButton;
    WindowCommands.Confirm.Execute(null, button);
}

Hope this works for you.

Regards,
Kalin
Telerik