I'm working on customizing advanced form of the scheduler.
I have been able to achieve the customization part using user controls (AdvancedForm, ResourceControl and MultipleValuesResourceControl).
I have two controls of single value resource control type and one control of multiple values resource control type. Find the screenshot depicting this.
My requirement involves replacing this multiple values resource control from check boxes to a multi-select combo box.
I tried replicating the current multiple values resource by adding a new user control, called it MultipleValuesDropDownResourceControl.ascx, registered it in AdvancedForm and tried making changes in the MultipleValuesDropDownResourceControl.cs file to replace with but I wasn't able to achieve this functionality. I wasn't able to even partly achieve this, hence I don't have any code to share.
Can anyone please provide some guidance on how a control type can be modified.
Links I have referred to achieve customized advanced form - http://www.telerik.com/support/code-library/customize-the-advanced-form-with-the-advanced-template-user-controls
http://www.telerik.com/videos/aspnet-ajax/advanced-aspnet-ajax-scheduler-customization (tutorial I followed)