Access or alter data from ListView

Question

i have a simple listview like that

<ListView Name="CoordinateList" Margin="2"
                  Grid.Row="3" Grid.Column="0" Grid.ColumnSpan="3">
    <ListView.View>
        <GridView>
            <GridViewColumn DisplayMemberBinding="{Binding Nr}"  Header="Nr." Width="40"/>
            <GridViewColumn DisplayMemberBinding="{Binding X}" Header="X" Width="100"/>
            <GridViewColumn DisplayMemberBinding="{Binding Y}" Header="Y" Width="100"/>
            <GridViewColumn DisplayMemberBinding="{Binding Q}" Header="Q" Width="40"/>
        </GridView>
    </ListView.View>
</ListView>

i can add items, sort or remove them e.g.:

CoordinateList.Items.Add(new Coordinate() { Nr = 1, X = 230, Y = 530, Q = 2 });

but how can i access or alter the data now? this doesn't give me the properties of Coordinate:

CoordinateList.Items[i].

Answer 1

A ListView stores its Items collection as objects, so in order to access an item as a Coordinate object, you need to cast it to a Coordinate type first. E.g.:

var coord = (Coordinate) CoordinateList.Items[i];
...

Edit: Also see @Muds' answer for better practice.