How to add Update And delete Data using Listcollectionview and Binding Listcollection in wpf?

Xmal:

<Window.Resources>

        <CollectionViewSource x:Key="MasterViewSource" />

        <CollectionViewSource Source="{Binding Source={StaticResource MasterViewSource}, Path='InwardDetails'}" x:Key="DetailsViewSource" />

        <CollectionViewSource x:Key="PartyList" />

        <CollectionViewSource x:Key="ItemList" />

</Window.Resources>

    <Grid DataContext="{Binding Source={StaticResource MasterViewSource}}">

        <Grid.RowDefinitions>

            <RowDefinition Height="38*" />

            <RowDefinition Height="86*" />

            <RowDefinition Height="230*" />

            <RowDefinition Height="115*" />

            <RowDefinition Height="28*" />

        </Grid.RowDefinitions>

        <TextBlock Height="16"

                   HorizontalAlignment="Left"

                   Margin="621,6,0,0"

                   Name="textBlock1"

                   Text="Date:"

                   VerticalAlignment="Top"

                    TextAlignment="Justify" Grid.Row="1" />

        <telerik:RadDatePicker

            HorizontalAlignment="Left"

            Margin="654,2,0,0"

            Name="dtpInwarddate"

            VerticalAlignment="Top"

            SelectedValue="{Binding Path=InwardDate}"

            Width="105" Grid.Row="1" />

        <TextBlock Height="16"

                   HorizontalAlignment="Left"

                   Margin="613,41,0,0"

                   Name="textBlock2"

                   Text="Bill No:"

                   TextAlignment="Justify"

                   VerticalAlignment="Top"

                   Grid.Row="1" />

        <telerik:RadWatermarkTextBox

            Grid.Row="1" Height="23"

            HorizontalAlignment="Left"

            Margin="654,36,0,0"

            Name="txtbillNo"

            Text="{Binding Path=BillNo}"

            WatermarkContent="Enter Bill No"

            VerticalAlignment="Top" Width="105" />

        <telerik:RadComboBox Grid.Row="1"

                             HorizontalAlignment="Left"

                             Margin="0,6,0,0"

                             Name="cmbparty"

                             ItemsSource="{Binding Source={StaticResource PartyList}}"

                             DisplayMemberPath="PartyName"

                             SelectedItem="{Binding Path=PartyMaster}"

                             VerticalAlignment="Top"

                             Width="250" >

            <!--<telerik:RadComboBoxItem Content="Item 1" />

            <telerik:RadComboBoxItem Content="Item 2" />

            <telerik:RadComboBoxItem Content="Item 3" />-->

        </telerik:RadComboBox>

        <telerik:RadWatermarkTextBox Grid.Row="3"

                                     Height="23" HorizontalAlignment="Left"

                                     Margin="42,11,0,0"

                                     Name="txtRemark"

                                     Text="{Binding Path=Remark}"

                                     VerticalAlignment="Top" Width="272" />

        <TextBlock

            Height="15" HorizontalAlignment="Left"

            Margin="0,14,0,0" Name="textBlock3"

            Text="Remark:" TextAlignment="Justify"

            VerticalAlignment="Top" Grid.Row="3" />

        <GroupBox Grid.Row="3" Header="groupBox1" Height="87" HorizontalAlignment="Left" Margin="616,1,0,0" Name="groupBox1" VerticalAlignment="Top" Width="113">

            <Grid Width="102">

                <TextBlock Height="15" HorizontalAlignment="Left" Margin="3,15,0,0" Name="textBlock4" Text="Add:" TextAlignment="Justify" VerticalAlignment="Top" />

                <TextBlock Height="15" HorizontalAlignment="Left" Margin="1,44,0,0" Name="textBlock5" Text="Less:" TextAlignment="Justify" VerticalAlignment="Top" />

                <telerik:RadWatermarkTextBox Height="23" Text="{Binding Path=AmountAdd}" HorizontalAlignment="Left" Margin="27,10,0,0" Name="txtAdd" VerticalAlignment="Top" Width="69" />

                <telerik:RadWatermarkTextBox Height="23" Text="{Binding Path=AmountLess}" HorizontalAlignment="Left" Margin="27,39,0,0" Name="txtless" VerticalAlignment="Top" Width="69" />

            </Grid>

        </GroupBox>

        <telerik:RadWatermarkTextBox

            Height="23" Margin="563,93,0,0" Name="txtpaid"

            VerticalAlignment="Top" Grid.Row="3" Text="{Binding Path=Paid}" HorizontalAlignment="Left" Width="69" />

        <TextBlock Height="15" HorizontalAlignment="Left"

                   Margin="536,99,0,0" Name="textBlock7"

                   Text="Paid:" TextAlignment="Justify"

                   VerticalAlignment="Top" Grid.Row="3" Width="29" />

        <TextBlock Height="15" HorizontalAlignment="Left"

                   Margin="648,98,0,0" Name="textBlock8"

                   Text="Total:" TextAlignment="Justify"

                   VerticalAlignment="Top" Width="32" Grid.Row="3" />

        <telerik:RadWatermarkTextBox Height="23" HorizontalAlignment="Right"

                                     Margin="0,93,12,0" Name="txttotal"

                                     VerticalAlignment="Top" Width="69"

                                     Grid.Row="3"

                                     Text="{Binding Path=Total}"/>

        <TextBlock Height="15" HorizontalAlignment="Left" Margin="12,42,0,0" Name="textBlock6" Text="Paid:" TextAlignment="Justify" VerticalAlignment="Top" Grid.Row="3" />

        <telerik:RadWatermarkTextBox Height="23"

                                     Margin="42,39,0,0" Name="txtpaidremark"

                                     VerticalAlignment="Top" Grid.Row="3"

                                     HorizontalAlignment="Left" Width="216"

                                     Text="{Binding Path=PaidRemark}"/>

<ListView Grid.Row="2" Name="ListView1"

                  IsSynchronizedWithCurrentItem="True"

                  ItemsSource="{Binding Source={StaticResource DetailsViewSource}}" PreviewKeyDown="ListView1_PreviewKeyDown">

                <ListView.ItemContainerStyle>

                    <Style TargetType="ListViewItem">

                        <Setter Property="HorizontalContentAlignment" Value="Stretch" />

                        <EventSetter Event="GotFocus" Handler="Item_GotFocus" />

                    </Style>

                </ListView.ItemContainerStyle>

                <ListView.View>

                    <GridView>

                        <GridViewColumn Header="Item" Width="150">

                            <GridViewColumn.CellTemplate>

                                <DataTemplate>

                                    <ComboBox IsEditable="False"

                                  Name="cboProduct"

                                  IsSynchronizedWithCurrentItem="False"      

                                  ItemsSource="{Binding Source={StaticResource ItemList}}"

                                  SelectedItem="{Binding Path=ItemMaster}"

                                  SelectedValuePath="ItemId"

                                  DisplayMemberPath="ItemName"

                                  Margin="-6,0,-6,0"/>

                                </DataTemplate>

                            </GridViewColumn.CellTemplate>

                        </GridViewColumn>

                        <GridViewColumn Header="Qty" Width="75">

                            <GridViewColumn.CellTemplate>

                                <DataTemplate>

                                <TextBox Text="{Binding Path=Qty}"

                                         Margin="-6,0,-6,0"/>

                            </DataTemplate>

                            </GridViewColumn.CellTemplate>

                        </GridViewColumn>

                        <GridViewColumn Header="Rate" Width="75">

                            <GridViewColumn.CellTemplate>

                                <DataTemplate>

                                <TextBox Text="{Binding Path=Rate}"

                                         Margin="-6,0,-6,0"/>

                                </DataTemplate>

                            </GridViewColumn.CellTemplate>

                        </GridViewColumn>

                        <GridViewColumn Header="Amount" Width="75">

                            <GridViewColumn.CellTemplate>

                                <DataTemplate>

                                <TextBox Text="{Binding Path=Amount}"

                                         Margin="-6,0,-6,0"/>

                                </DataTemplate>

                            </GridViewColumn.CellTemplate>

                        </GridViewColumn>

                    </GridView>

                </ListView.View>

            </ListView>

        <telerik:RadButton Content="New" Height="23" Margin="68,0,631,5" Name="btnNew" Width="60" Grid.Row="4" Click="btnNew_Click" />

        <telerik:RadButton Content="View" Height="23" Margin="143,0,556,5" Name="Btnview" Width="60" Grid.Row="4" Click="Btnview_Click" />

        <telerik:RadButton Content="Save" Height="23" Margin="218,0,481,5" Name="btnSave" Width="60" Grid.Row="4" Click="btnSave_Click" />

        <telerik:RadButton Content="Delete" Height="23" Margin="293,0,406,5" Name="btnDelete" Width="60" Grid.Row="4" Click="btnDelete_Click" />

    </Grid>

</Window>

  C#Code behind

public partial class inwddetail : Window

    {

        HTBookEntities book = new HTBookEntities();

        private InwardCollection inwarddata;         // inherits from ObservableCollection

        private CollectionViewSource MasterViewSource;

        private CollectionViewSource DetailViewSource;

        Inward iwd;

        int iid;

        DataGridForm dgf;

        //  Provides currency to controls (position & movement in the collections)

        private ListCollectionView MasterView;  

        private BindingListCollectionView DetailsView;

        public inwddetail()

        {

            InitializeComponent();

        }

        private void Window_Loaded(object sender, RoutedEventArgs e)

        {

            iid = 8;

            MethodMasterView(iid);

            //IQueryable<Inward> query = from i in book.Inwards.Include("InwardDetails")

            //                           where i.InwardId == 7

            //                           select i;

            //this.inwarddata = new InwardCollection(query, book);

            IQueryable<PartyMaster> partylist = from p in book.PartyMasters select p;

            IQueryable<ItemMaster> itemlist = from i in book.ItemMasters select i;

            this.MasterViewSource = (CollectionViewSource)this.FindResource("MasterViewSource");

            this.DetailViewSource = (CollectionViewSource)this.FindResource("DetailsViewSource");

            this.MasterViewSource.Source = this.inwarddata;

            CollectionViewSource customerSource = (CollectionViewSource)this.FindResource("PartyList");

            customerSource.Source = partylist.ToList();  

            CollectionViewSource productSource = (CollectionViewSource)this.FindResource("ItemList");

            productSource.Source = itemlist.ToList();

            this.MasterView = (ListCollectionView)this.MasterViewSource.View;

            MasterView.CurrentChanged += new EventHandler(MasterView_CurrentChanged);

            this.DetailsView = (BindingListCollectionView)this.DetailViewSource.View;

           

        }

        private void MasterView_CurrentChanged(object sender, System.EventArgs e)

        {

            this.DetailsView = (BindingListCollectionView)this.DetailViewSource.View;

        }

        private void btnSave_Click(object sender, RoutedEventArgs e)

        {

            try

            {

                book.SaveChanges();

                MessageBox.Show("Order data saved.", this.Title, MessageBoxButton.OK, MessageBoxImage.Information);

            }

            catch (Exception ex)

            {

                MessageBox.Show(ex.ToString());

            }

        }

        private void Item_GotFocus(object sender, System.Windows.RoutedEventArgs e)

        {

            // This will keep the View position in sync with the selected

            // row even when a control is being edited in the ListViewItem

            ListViewItem item = (ListViewItem)sender;

            this.ListView1.SelectedItem = item.DataContext;

        }

        private void btnNew_Click(object sender, RoutedEventArgs e)

        {

            this.MasterView.AddNew();

            this.MasterView.CommitNew();

        }

        private void ListView1_PreviewKeyDown(object sender, KeyEventArgs e)

        {

            if (e.Key == Key.Subtract)

            {

                if (this.DetailsView.CurrentPosition > -1)

                    this.DetailsView.RemoveAt(this.DetailsView.CurrentPosition);

                e.Handled = true;

            }

            if (e.Key == Key.Add)

            {

                this.DetailsView.AddNew();

                this.DetailsView.CommitNew();

            }

        }

        private void Btnview_Click(object sender, RoutedEventArgs e)

        {

            iwd = new Inward();

            dgf = new DataGridForm();

            var grid = iwd.Gridinward();

            dgf.GridFormText("Inward");

            iid = dgf.Returnid(grid);

            //this.MasterView.MoveCurrentToPosition(iid);

            MethodMasterView(iid);

        }

        private void btnDelete_Click(object sender, RoutedEventArgs e)

        {

            if (this.MasterView.CurrentPosition > -1)

                this.MasterView.RemoveAt(this.MasterView.CurrentPosition);

            book.SaveChanges();

            MessageBox.Show("Entry Deleted");

        }

        public void MethodMasterView(int id)

        {

            IQueryable<Inward> query = from i in book.Inwards.Include("InwardDetails")

                                       where i.InwardId == id

                                       select i;

            this.inwarddata = new InwardCollection(query, book);

        }

        

    }