Tracking items checked while looping through a ListView - wpf

Question

I have a list view like this:
<ListView Name="FinalListView"
SelectionMode="Multiple"
SelectionChanged="FinalListView_SelectionChanged">
<ListView.View>
<GridView>
<GridViewColumn>
<GridViewColumn.CellTemplate>
<DataTemplate>
<CheckBox Tag="{Binding ID}"
IsChecked="{Binding RelativeSource={RelativeSource AncestorType={x:Type ListViewItem}}, Path=IsSelected}" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn DisplayMemberBinding="{Binding Name}" Header="Name" Width="400"/>
</GridView>
</ListView.View>
</ListView>
As you can see the list view's each item contains a checkbox, But below is my Parallel.Foreach loop to iterating with my loop and work with the items.
Please let me know, how can not which item is checked, and not checked in the loop as below :
FinalFileNames -> IS the Collection. i.e. the data source for the listview.
Parallel.ForEach(FinalFileNames,
new ParallelOptions { MaxDegreeOfParallelism = 4 },
path =>
{
-----code ------------
});
});

Answer 1

To Find the Checked Items in your List
Have a Boolean property to bind the check Box,
foreach (TheObjectYouBindedForYourList item in FinalFileNames )
{
if (item.Checked== true)
{
}
}

Answer 2

You should add a Checked property to the objects in your FinalFileNames collection. I see you are already binding to the properties ID and Name in your XAML, so I will assume this is not a collection of primitive types. So if your class looks something like this:
public class FileName
{
public string Name { get; set; }
public int ID { get; set; }
}
add a Checked property to it
public bool Checked { get; set; }
Then in your XAML you can add a style which binds the IsSelected property of the ListViewItem to the Checked property of your object.
<ListView.Resources>
<Style TargetType="ListViewItem">
<Setter Property="IsSelected" Value="{Binding Checked}"/>
</Style>
</ListView.Resources>
Now the Checked property will be set on your FileName object whenever the ListViewItem is selected and it can be checked in your Parallel.ForEach code:
Parallel.ForEach(FinalFileNames,
new ParallelOptions { MaxDegreeOfParallelism = 4 },
path =>
{
if (path.Checked)
{
// code
}
});
});