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RadControls for ASP.NET AJAX Fundamentals
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      RadControls for ASP.NET AJAX
RadScheduler has a DataSource property that lets you bind it to any object that implements
the IListSource or IEnumerable interface. Thus, you can bind the scheduler directly to a DataTable or DataView (IListSource),
or to various List objects (IEnumerable). When using the DataSource property to bind the scheduler,
you must also implement the code for inserting, updating, and deleting appointments using the RadScheduler
server-side events.
Example
The following example demonstrates binding to a generic list of objects, which represents appointment information,
including a custom resource for room. It implements AppointmentInsert, AppointmentUpdate,
and AppointmentDelete event handlers to allow the scheduler to insert, update, and delete appointments.
Drag a RadScheduler control from the toolbox onto your page.
Move to the code-behind page for your web page, and add two lines to the using
section (C#) or Imports section (VB).  CopyC# using Telerik.Web.UI;
using System.Collections.Generic; CopyVB.NET
Imports Telerik.Web.UI
Imports System.Collections.Generic
In the definition of the class for your Web page, add two class definitions, one to hold information about
appointments, and another to hold information about the custom resource (rooms): CopyC# class AppointmentInfo
{
private string id;
private string subject;
private DateTime start;
private DateTime end;
private string recurParentID;
private string recurData;
private int room;
public string ID
{
get { return id; }
set { id = value; }
}
public string Subject
{
get { return subject; }
set { subject = value; }
}
public DateTime Start
{
get { return start; }
set { start = value; }
}
public DateTime End
{
get { return end; }
set { end = value; }
}
public string RecurrenceRule
{
get { return recurData; }
set { recurData = value; }
}
public string RecurrenceParentID
{
get { return recurParentID; }
set { recurParentID = value; }
}
public int RoomNo
{
get { return room; }
set { room = value; }
}
private AppointmentInfo()
{
this.id = Guid.NewGuid().ToString();
}
public AppointmentInfo(string subject, DateTime start, DateTime end)
: this()
{
this.subject = subject;
this.start = start;
this.end = end;
}
public AppointmentInfo(Appointment source)
: this()
{
CopyInfo(source);
}
public void CopyInfo(Appointment source)
{
subject = source.Subject;
start = source.Start;
end = source.End;
recurData = source.RecurrenceRule;
if (source.RecurrenceParentID != null)
recurParentID = source.RecurrenceParentID.ToString();
Resource r = source.Resources.GetResourceByType("Room");
if (r != null)
room = (int) r.Key;
}
}
class RoomInfo
{
private int id;
private string name;
public int RoomNo
{
get { return id; }
}
public string RoomName
{
get { return name; }
}
public RoomInfo(int id, string name)
{
this.id = id;
this.name = name;
}
}CopyVB.NET Class AppointmentInfo
Private id As String
Private subject As String
Private start As DateTime
Private [end] As DateTime
Private recurParentID As String
Private recurData As String
Private room As Integer
Public Property ID() As String
Get
Return id
End Get
Set(ByVal value As String)
id = value
End Set
End Property
Public Property Subject() As String
Get
Return subject
End Get
Set(ByVal value As String)
subject = value
End Set
End Property
Public Property Start() As DateTime
Get
Return start
End Get
Set(ByVal value As DateTime)
start = value
End Set
End Property
Public Property [End]() As DateTime
Get
Return [end]
End Get
Set(ByVal value As DateTime)
[end] = value
End Set
End Property
Public Property RecurrenceRule() As String
Get
Return recurData
End Get
Set(ByVal value As String)
recurData = value
End Set
End Property
Public Property RecurrenceParentID() As String
Get
Return recurParentID
End Get
Set(ByVal value As String)
recurParentID = value
End Set
End Property
Public Property RoomNo() As Integer
Get
Return room
End Get
Set(ByVal value As Integer)
room = value
End Set
End Property
Private Sub New()
Me.id = Guid.NewGuid().ToString()
End Sub
Public Sub New(ByVal subject As String, ByVal start As DateTime, _
ByVal [end] As DateTime)
Me.New()
Me.subject = subject
Me.start = start
Me.[end] = [end]
End Sub
Public Sub New(ByVal source As Appointment)
Me.New()
CopyInfo(source)
End Sub
Public Sub CopyInfo(ByVal source As Appointment)
subject = source.Subject
start = source.Start
[end] = source.[End]
recurData = source.RecurrenceRule
If source.RecurrenceParentID <> Nothing Then
recurParentID = source.RecurrenceParentID.ToString()
End If
Dim r As Resource = source.Resources.GetResourceByType("Room")
If r <> Nothing Then
room = DirectCast(r.Key, Integer)
End If
End Sub
End Class
Class RoomInfo
Private id As Integer
Private name As String
Public ReadOnly Property RoomNo() As Integer
Get
Return id
End Get
End Property
Public ReadOnly Property RoomName() As String
Get
Return name
End Get
End Property
Public Sub New(ByVal id As Integer, ByVal name As String)
Me.id = id
Me.name = name
End Sub
End Class
Add two private properties to the class for your Web page whose values are the current list
of appointments and the list of rooms. The appointments list needs to persist, so we save that
one in the session state: CopyC# private const string AppointmentsKey =
"Telerik.Examples.Scheduler.BindToList_Apts" ;
private List<AppointmentInfo> Appointments
{
get
{
List<AppointmentInfo> sessApts =
Session[AppointmentsKey] as List<AppointmentInfo>;
if (sessApts == null)
{
sessApts = new List<AppointmentInfo>();
Session[AppointmentsKey] = sessApts;
}
return sessApts;
}
}
private List<RoomInfo> Rooms
{
get
{
List<RoomInfo> roomList = new List<RoomInfo>();
roomList.Add(new RoomInfo(1, "Margaret Morrison Main Room"));
roomList.Add(new RoomInfo(2, "Black Auditorium"));
roomList.Add(new RoomInfo(3, "Doherty Auditorium"));
return roomList;
}
}CopyVB.NET Private Const AppointmentsKey As String = _
"Telerik.Examples.Scheduler.BindToList_Apts"
Private ReadOnly Property Appointments() As List(Of AppointmentInfo)
Get
Dim sessApts As List(Of AppointmentInfo) = _
TryCast(Session(AppointmentsKey), List(Of AppointmentInfo))
If sessApts = Nothing Then
sessApts = New List(Of AppointmentInfo)()
Session(AppointmentsKey) = sessApts
End If
Return sessApts
End Get
End Property
Private ReadOnly Property Rooms() As List(Of RoomInfo)
Get
Dim roomList As New List(Of RoomInfo)()
roomList.Add(New RoomInfo(1, "Margaret Morrison Main Room"))
roomList.Add(New RoomInfo(2, "Black Auditorium"))
roomList.Add(New RoomInfo(3, "Doherty Auditorium"))
Return roomList
End Get
End Property
Add the FindById helper function to the class for your Web page: CopyC# private AppointmentInfo FindById(string ID)
{
foreach (AppointmentInfo ai in Appointments)
{
if (ai.ID == ID)
{
return ai;
}
}
return null;
}CopyVB.NET Private Function FindById(ByVal ID As String) As AppointmentInfo
For Each ai As AppointmentInfo In Appointments
If ai.ID = ID Then
Return ai
End If
Next
Return Nothing
End Function
In the Page_Load event handler, add code to initialize the RadScheduler so that it can read the
appointment information, define the custom resource type for rooms, and set the DataSource property
to bind the scheduler to the data. CopyC#
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Session.Remove(AppointmentsKey);
RadScheduler1.DataKeyField = "ID";
RadScheduler1.DataStartField = "Start";
RadScheduler1.DataEndField = "End";
RadScheduler1.DataSubjectField = "Subject";
RadScheduler1.DataRecurrenceField = "RecurrenceRule";
RadScheduler1.DataRecurrenceParentKeyField = "RecurrenceParentID";
ResourceType rt = new ResourceType("Room");
rt.DataSource = Rooms;
rt.KeyField = "RoomNo";
rt.ForeignKeyField = "RoomNo";
rt.TextField = "RoomName";
RadScheduler1.ResourceTypes.Add(rt);
}
RadScheduler1.DataSource = Appointments;
}CopyVB.NET Protected Sub Page_Load(ByVal sender As Object, _
ByVal e As EventArgs) _
Handles MyPage.Load
If Not IsPostBack Then
Session.Remove(AppointmentsKey)
RadScheduler1.DataKeyField = "ID"
RadScheduler1.DataStartField = "Start"
RadScheduler1.DataEndField = "End"
RadScheduler1.DataSubjectField = "Subject"
RadScheduler1.DataRecurrenceField = "RecurrenceRule"
RadScheduler1.DataRecurrenceParentKeyField = "RecurrenceParentID"
Dim rt As New ResourceType("Room")
rt.DataSource = Rooms
rt.KeyField = "RoomNo"
rt.ForeignKeyField = "RoomNo"
rt.TextField = "RoomName"
RadScheduler1.ResourceTypes.Add(rt)
End If
RadScheduler1.DataSource = Appointments
End Sub
Return to the designer for Default.aspx and select the RadScheduler control.
In the properties pane, double-click on the AppointmentInsert event and add the following event handler: CopyC# protected void RadScheduler1_AppointmentInsert(object sender, SchedulerCancelEventArgs e)
{
Appointments.Add(new AppointmentInfo(e.Appointment));
}CopyVB.NET
Protected Sub RadScheduler1_AppointmentInsert( _
ByVal sender As Object, _
ByVal e As SchedulerCancelEventArgs) _
Handles RadScheduler1.AppointmentInsert
Appointments.Add(New AppointmentInfo(e.Appointment))
End Sub
Double-click on the AppointmentUpdate event and add the following event handler: CopyC# protected void RadScheduler1_AppointmentUpdate(object sender, AppointmentUpdateEventArgs e)
{
AppointmentInfo ai = FindById(e.ModifiedAppointment.ID.ToString());
ai.CopyInfo(e.ModifiedAppointment);
}CopyVB.NET Protected Sub RadScheduler1_AppointmentUpdate( _
ByVal sender As Object, _
ByVal e As AppointmentUpdateEventArgs) _
Handles RadScheduler1.AppointmentUpdate
Dim ai As AppointmentInfo = FindById(
e.ModifiedAppointment.ID.ToString())
ai.CopyInfo(e.ModifiedAppointment)
End Sub
Double-click on the AppointmentDelete event and add the following event handler: CopyC# protected void RadScheduler1_AppointmentDelete(object sender, SchedulerCancelEventArgs e)
{
Appointments.Remove(FindById(e.Appointment.ID.ToString()));
}CopyVB.NET Protected Sub RadScheduler1_AppointmentDelete( _
ByVal sender As Object, _
ByVal e As SchedulerCancelEventArgs) _
Handles RadScheduler1.AppointmentDelete
Appointments.Remove(FindById(e.Appointment.ID.ToString()))
End Sub
You have now bound your scheduler using the DataSource property. Run the application and
note the custom resource is available in the edit form.
See Also
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