WPF : Extend last column of ListView’s GridView

You can add GridViewColumns to the GridView dynamically given the first array using a method like this:

private void AddColumns(GridView gv, string[] columnNames)
{
    for (int i = 0; i < columnNames.Length; i++)
    {
        gv.Columns.Add(new GridViewColumn
        {
            Header = columnNames[i],
            DisplayMemberBinding = new Binding(String.Format("[{0}]", i))
        });
    }
}

I assume the second array containing the values will be of ROWS * COLUMNS length. In that case, your items can be string arrays of length COLUMNS. You can use Array.Copy or LINQ to split up the array. The principle is demonstrated here:

<Grid>
    <Grid.Resources>
        <x:Array x:Key="data" Type="{x:Type sys:String[]}">
            <x:Array Type="{x:Type sys:String}">
                <sys:String>a</sys:String>
                <sys:String>b</sys:String>
                <sys:String>c</sys:String>
            </x:Array>
            <x:Array Type="{x:Type sys:String}">
                <sys:String>do</sys:String>
                <sys:String>re</sys:String>
                <sys:String>mi</sys:String>
            </x:Array>
        </x:Array>
    </Grid.Resources>
    <ListView ItemsSource="{StaticResource data}">
        <ListView.View>
            <GridView>
                <GridViewColumn DisplayMemberBinding="{Binding Path=[0]}" Header="column1"/>
                <GridViewColumn DisplayMemberBinding="{Binding Path=[1]}" Header="column2"/>
                <GridViewColumn DisplayMemberBinding="{Binding Path=[2]}" Header="column3"/>
            </GridView>
        </ListView.View>
    </ListView>
</Grid>

From what I see the WPF GridView is just a view mode (look n feel) for the ListView control.. As with most things in WPF, I'd advise you to do this with the ViewModel pattern.

• What that means is that you have create a ViewModel object for each row in the Grid. The real model would be your DataTable row. The View model is seeded with data from the real model.. i.e. you create a new ViewModel instance from each row in your DataTable. You then populate the Grid with ViewModel objects
• The View model exposes properties for each value you need to display in the actual view. So in this case your ViewModel would expose 3 properties (for each column).
• Wire up your UI Column to bind to the respective properties in the ViewModel.
• Now your ViewModel.Property1 would contain the logic of updating Property2 with the right computed value on a change. Both of them should trigger off PropertyChanged notifications and the GridView should reflect the updated values in both cells.