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Scheduler for Silverlight Tutorials / Creating a Custom Application for Custom Data / Step 2 of 5: Defining Custom Data Structure
In This Topic
    Step 2 of 5: Defining Custom Data Structure
    In This Topic

    In this step, you will define business object classes (BusinessObjects.cs or BusinessObjects.vb files).

    1. Right-click the application name and select Add | New Item. Choose Code File from the list of installed templates. Name the new code file BusinessObject.cs or BusinessObjects.vb depending on the code language you are using.
    2. Import the following namespaces into the page:

      Visual Basic
      Copy Code 
      Imports System
Imports System.ComponentModel
Imports System.Collections.ObjectModel

      C#
      Copy Code 
      using System;
using System.ComponentModel;
using System.Collections.ObjectModel;

    3. Add the following code to implement the business object class:

      Visual Basic
      Copy Code 
      ' Business object should implement INotifyPropertyChanged interface.
Public Class AppointmentBORow
    Implements INotifyPropertyChanged

    Private _subject As String = ""
    Private _body As String = ""
    Private _location As String = ""
    Private _properties As String = ""
    Private _start As DateTime = DateTime.Today
    Private _end As DateTime = (DateTime.Today + TimeSpan.FromDays(1))
    Private _id As Guid = Guid.NewGuid
    Private _isDeleted As Boolean = False
    'Custom Data
    Private _BOProperty1 As String = ""
    Private _BOProperty2 As String = ""
    Public Sub New()
        MyBase.New()
    End Sub
    Public Property Subject As String
        Get
            Return _subject
        End Get
        Set(value As String)
            If (_subject <> value) Then
                _subject = value
                OnPropertyChanged("Subject")
            End If
        End Set
    End Property
    Public Property BOProperty1 As String
        Get
            Return _BOProperty1
        End Get
        Set(value As String)
            If (_BOProperty1 <> value) Then
                _BOProperty1 = value
                OnPropertyChanged("BOProperty1")
            End If
        End Set
    End Property
    Public Property BOProperty2 As String
        Get
            Return _BOProperty2
        End Get
        Set(value As String)
            If (_BOProperty2 <> value) Then
                _BOProperty2 = value
                OnPropertyChanged("BOProperty2")
            End If
        End Set
    End Property
    Public Property Properties As String
        Get
            Return _properties
        End Get
        Set(value As String)
            If (_properties <> value) Then
                _properties = value
                OnPropertyChanged("Properties")
            End If
        End Set
    End Property
    Public Property Start As DateTime
        Get
            Return _start
        End Get
        Set(value As DateTime)
            If (_start <> value) Then
                _start = value
                OnPropertyChanged("Start")
            End If
        End Set
    End Property
    Public Property dt As DateTime
        Get
            Return _end
        End Get
        Set(value As DateTime)
            If (_end <> value) Then
                _end = value
                OnPropertyChanged("End")
            End If
        End Set
    End Property
    Public Property Body As String
        Get
            Return _body
        End Get
        Set(value As String)
            If (_body <> value) Then
                _body = value
                OnPropertyChanged("Body")
            End If
        End Set
    End Property
    Public Property Location As String
        Get
            Return _location
        End Get
        Set(value As String)
            If (_location <> value) Then
                _location = value
                OnPropertyChanged("Location")
            End If
        End Set
    End Property
    Public Property Id As Guid
        Get
            Return _id
        End Get
        Set(value As Guid)
            If (_id <> value) Then
                _id = value
                OnPropertyChanged("Id")
            End If
        End Set
    End Property
    Public Property IsDeleted As Boolean
        Get
            Return _isDeleted
        End Get
        Set(value As Boolean)
            If (_isDeleted <> value) Then
                _isDeleted = value
                OnPropertyChanged("IsDeleted")
            End If
        End Set
    End Property

    Public Event PropertyChanged As PropertyChangedEventHandler
    Protected Overridable Sub OnPropertyChanged(ByVal propName As String)
        If PropertyChangedEvent IsNot Nothing Then
            RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(propName))
        End If
    End Sub

    Public Event PropertyChanged1(sender As Object, e As System.ComponentModel.PropertyChangedEventArgs) Implements System.ComponentModel.INotifyPropertyChanged.PropertyChanged
End Class

      C#
      Copy Code 
      // Business object should implement INotifyPropertyChanged interface.
    public class AppointmentBORow : INotifyPropertyChanged
    {
        private string _subject = "";
        private string _body = "";
        private string _location = "";
        private string _properties = "";
        private DateTime _start = DateTime.Today;
        private DateTime _end = DateTime.Today + TimeSpan.FromDays(1);
        private Guid _id = Guid.NewGuid();
        private bool _isDeleted = false;       
        //Custom Data
        private string _BOProperty1 = "";
        private string _BOProperty2 = "";
        public AppointmentBORow()
        {
        }
        public string Subject
        {
            get { return _subject; }
            set
            {
                if (_subject != value)
                {
                    _subject = value;
                    OnPropertyChanged("Subject");
                }
            }
        }
        public string BOProperty1
        {
            get { return _BOProperty1; }
            set
            {
                if (_BOProperty1 != value)
                {
                    _BOProperty1 = value;
                    OnPropertyChanged("BOProperty1");
                }
            }
        }
        public string BOProperty2
        {
            get { return _BOProperty2; }
            set
            {
                if (_BOProperty2 != value)
                {
                    _BOProperty2 = value;
                    OnPropertyChanged("BOProperty2");
                }
            }
        }
        public string Properties
        {
            get { return _properties; }
            set
            {
                if (_properties != value)
                {
                    _properties = value;
                    OnPropertyChanged("Properties");
                }
            }
        }
        public DateTime Start
        {
            get { return _start; }
            set
            {
                if (_start != value)
                {
                    _start = value;
                    OnPropertyChanged("Start");
                }
            }
        }
        public DateTime End
        {
            get { return _end; }
            set
            {
                if (_end != value)
                {
                    _end = value;
                    OnPropertyChanged("End");
                }
            }
        }
        public string Body
        {
            get { return _body; }
            set
            {
                if (_body != value)
                {
                    _body = value;
                    OnPropertyChanged("Body");
                }
            }
        }
        public string Location
        {
            get { return _location; }
            set
            {
                if (_location != value)
                {
                    _location = value;
                    OnPropertyChanged("Location");
                }
            }
        }
        public Guid Id
        {
            get { return _id; }
            set
            {
                if (_id != value)
                {
                    _id = value;
                    OnPropertyChanged("Id");
                }
            }
        }
        public bool IsDeleted
        {
            get { return _isDeleted; }
            set
            {
                if (_isDeleted != value)
                {
                    _isDeleted = value;
                    OnPropertyChanged("IsDeleted");
                }
            }
        }
        public event PropertyChangedEventHandler PropertyChanged;
        protected virtual void OnPropertyChanged(string propName)
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(propName));
        }
    }

    4. Insert the following code to implement the business object collection class:

      Visual Basic
      Copy Code 
      ' Business objects collection should implement INotifyCollectionChanged interface.
Public Class AppointmentBOList
    Inherits ObservableCollection(Of AppointmentBORow)
    Protected Overrides Sub RemoveItem(ByVal index As Integer)
        Dim item As AppointmentBORow = Me(index)
        If (Not (item) Is Nothing) Then
            item.IsDeleted = True
        End If
        MyBase.RemoveItem(index)
    End Sub
End Class

      C#
      Copy Code 
      // Business objects collection should implement INotifyCollectionChanged interface.
    public class AppointmentBOList : ObservableCollection<AppointmentBORow>
    {
        protected override void RemoveItem(int index)
        {
            AppointmentBORow item = this[index];
            if (item != null)
            {
                item.IsDeleted = true;
            }
            base.RemoveItem(index);
        }
    }
}

    5. Insert the following public class below the namespace declaration (it creates and initializes the instance of the business objects collection):

      Visual Basic
      Copy Code 
      Public Class AppointmentsBO
    Private _list As AppointmentBOList = Nothing
    Public Sub New()
        MyBase.New()
        _list = New AppointmentBOList
        _list.Add(New AppointmentBORow)
    End Sub
    Public Property Appointments As AppointmentBOList
        Get
            Return _list
        End Get
        Set(value As AppointmentBOList)
            _list = value
        End Set
    End Property
End Class

      C#
      Copy Code 
      public class AppointmentsBO
    {
        AppointmentBOList _list = null;

        public AppointmentsBO()
        {
            _list = new AppointmentBOList();
            _list.Add(new AppointmentBORow());
        }

        public AppointmentBOList Appointments
        {
            get
            {
                return _list;
            }
            set
            {
                _list = value;
            }
        }
    }

      In this step you created business objects which will provide data for the C1Scheduler control in the future steps.

     

     

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