Get the Value of WPF Listview rows

Question

Get the Value of WPF Listview rows and compare them with database field using Linq query

i want to compare ECH_INTITULE in my database with the values of the listview rows but my problem is that i can't access the Listview items in my Linq query

here is my Xaml code for my Listview :

<ListView x:Name="listView" SelectedItem="{Binding SelectedItem}" ItemsSource="{Binding}" DataContext="query" HorizontalAlignment="Left" Height="430" Margin="24,47,0,0" VerticalAlignment="Top" Width="940" >
            <ListView.View>
                <GridView x:Name="gridView">
                    <GridViewColumn Header="Fournisseur" DisplayMemberBinding="{Binding fournisseur}" Width="280"/>
                    <GridViewColumn Header ="Adresse Mail" DisplayMemberBinding="{Binding email}" Width="270"/>
                    <GridViewColumn Header ="Date" DisplayMemberBinding="{Binding date}" Width="150"/>
                    <GridViewColumn Header="Fichier CSV" DisplayMemberBinding="{Binding xxx}" Width="105"/>
                    <GridViewColumn Header="Fichier PDF" DisplayMemberBinding="{Binding xxx}" Width="105"/>
                </GridView>
            </ListView.View>
        </ListView>

and here is my c# code :

 

//Generate CSV Files for each item in the Listview
            CsvFileDescription outpCsvFileDescription = new CsvFileDescription
            {
                SeparatorChar = ',',
                FirstLineHasColumnNames = true
            };

            for (int i = 0; i < listView.Items.Count; i++)
            {
                var infoEcheances = from f in db.F_ECHEANCES
                                    //where f.ECH_Intitule == ???
                                    select new { f.ECH_Intitule, f.ECH_DateEch, f.CG_Num, f.ECH_Piece, f.ECH_RefPiece, f.ECH_Montant, f.ECH_Libelle };


                CsvContext cc = new CsvContext();
                string myPath = @"C:\Users\DefaultAccount\Desktop\Projet Top Of Travel\FichiersCSV\";
                string filename = string.Format("Facture{0}.csv", i);
                string finalPath = System.IO.Path.Combine(myPath, filename);
                cc.Write(infoEcheances, finalPath, outpCsvFileDescription);
            }