Does anyone have/know of any examples for something similar to this: Telerik Sample For Multiple Resources

Except, with multi-valued resources?  I'm new to entity data sources, and I'm just inheriting a project that has an existing model that works.  But the owner is asking for a new resource type to be added that has a one-to-many relationship for "department(s)".  If this was a standard 3-tier system, I would have no trouble getting this completed.

I've got the database updated to the model I THINK by creating a link table Called "EventDepartments" (Model Layout is attached).  and I have the UI populating with the checkbox list.  But...

1. There is an Integrity error on insert/update: "The type of the key field 'ID' is expected to be 'System.Int32', but the value provided is actually of type 'System.Object[]'."
2. I have no idea where to go from here, as I don't know where to look for the issue since the appointment form is auto-generated/handled.

ResourceType:

 
Source:

Hi Michael Klink,

Thank you for the detailed information.

Please note that only custom providers can provide the support to allow multi-valued resources (resources that can have multiple values assigned to a single appointment). In your case multi-valued resources will not work with EntityDataSource. The only alternative that I can find is to use CustomAttributes instead of resources and to separate the attribute values by some delimiter (e.g semicolon). Please take a look at this demo for Custom Attributes.

Please let me know if this helps.

Best wishes,
Veronica Milcheva
the Telerik team

This is very similar to the question that I have.  I am working on a project where we have built objects that I have bound the RadScheduler but now we would like to be able to include three types of Resources and would like to assignee more than one of each type.  Based on your previous response, I see that this is not possible with Entity, is that true for other object models?  Examples exist that show how to schedule resources with database binding (for instance "The Advanced ASP.NET AJAX Reschedule Customization" video http://tv.telerik.com/watch/aspnet/radscheduler/advanced-radscheduler-customization).  However this video does not show population of an intersection table (that contains the instructorID and WebinarID) that is in your example from the video, would allow the user to schedule many instructors to many scheduled webinars.  Is many to many possible at all?  If so, can you point me in the direction of an video and/or code example that demonstrates the scheduling of many resources of one type. 

See the attached schema design.

 

Thanks for your help.

Hello Spyder,

Yes, this limitation is also true for other data sources. You need to implment a provider. Please, see this help topic - http://www.telerik.com/help/aspnet-ajax/scheduler-provider-with-multi-valued-resources.html

Kind regards,
Peter
the Telerik team