Getting Error: Sys.WebForms.PageRequestManagerServerErrorException

[Kashif]

Hi, my Default.aspx looks like: 

<telerik:RadScheduler ID="RadScheduler1" runat="server" Culture="de-DE"
        DataEndField="BIS" DataKeyField="RAUMID" DataSourceID="SqlDataSource1"
        DataStartField="VON" DataSubjectField="RAUMBEZEICHNUNG" Height="600px"
        HoursPanelTimeFormat="HH:mm" Skin="Black" SelectedView="TimelineView">

        <ResourceTypes>
            <telerik:ResourceType AllowMultipleValues="True" DataSourceID="SqlDataSource2"
                ForeignKeyField="RAUMID" KeyField="RAUMID" Name="Resource Type 0"
                TextField="BEZEICHNUNG" />
        </ResourceTypes>

    <TimelineView SlotDuration="01:00:00"  NumberOfSlots = "24" ColumnHeaderDateFormat="HH:mm" />

    <TimelineView UserSelectable="true" GroupBy="Resource Type 0"
            GroupingDirection="Vertical" />

    <DayView DayStartTime = "08:00:00" DayEndTime = "00:00:00"  EnableExactTimeRendering= "true" ShowHoursColumn ="true"/>

    </telerik:RadScheduler>

    <asp:SqlDataSource ID="SqlDataSource1" runat="server"
        ConnectionString="<%$ ConnectionStrings:Book-IT-LHConnectionString %>"
        SelectCommand="SELECT [RAUMBEZEICHNUNG], [RAUMID], [VON], [BIS] FROM [VIEW_RAUMBUCHUNG]" >
    </asp:SqlDataSource>

    <asp:SqlDataSource ID="SqlDataSource2" runat="server"
        ConnectionString="<%$ ConnectionStrings:Book-IT-LHConnectionString %>"
        SelectCommand="SELECT [RAUMID], [BEZEICHNUNG] FROM [VIEW_RAUM]">
    </asp:SqlDataSource>

The Data is displayed correctly. But if i want to switch for example between Timeline and DayView or i want to Edit an Appointment, i get an Error: 

Sys.WebForms.PageRequestManagerServerErrorException

Why is that?

If i Delete the ResourceTyp so i can Switch between the different views and i can edit the Appointment. But theres another Problem. For Example: My Appointment is from 16:00 until 17:00 at 11.07.2012 which is correcly displayed in the Dayview, but in the editMode the Date and the time ist wrong. How can i synchronize that ?

Thanks in advance

[Plamen]

Hello Kashif,

 
You can refer to this help article where is explained how to implement a provider that supports multi-valued resources. I am attaching a sample project as well. 

Hope this will be helpful. 

Greetings,
Plamen
the Telerik team