C# Retrieving data from ListView with GridView

Question

I have found some articles to get data to be put into a listview with a databinding on gridviewcolums but I am needing to retrieve this data when a line is selected from the list, this is the code i have to fill the list and "attempt" to retrieve the data. As far as i have found, please have very different ways of putting this data into a listview and I assume my problem is that I do not know the correct way to retrieve it with it formatted in the XAML this way.

private void Button_Click_1(object sender, RoutedEventArgs e)
{ // This is When a button is clicked to populate the List
    Operate op = new Operate();
    List<object> users = op.GetUser();
    if (users != null)
    {
        ResultsView.Items.Clear();
        foreach (UserPrincipal user in users)
        {
            ResultsView.Items.Add(new {Col1 = user.GivenName, Col2 = user.Surname, Col3 = user.SamAccountName});
        }
    }
}
private void ListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{ // This is When a line is selected and should get the info from the line
    if (ResultsView.SelectedItem != null)
    {
        string sel = ResultsView.SelectedItem.Col1;
    }
}

And this is the XAML for the list

<ListView
    x:Name="ResultsView"
    Margin="5,5,5,5"
    SelectionMode="Single"
    SelectionChanged="ListView_SelectionChanged">
    <ListView.View>
        <GridView>
            <GridViewColumn Width="100" Header="H1" DisplayMemberBinding="{Binding Col1}"/>
            <GridViewColumn Width="100" Header="H2" DisplayMemberBinding="{Binding Col2}"/>
            <GridViewColumn Width="100" Header="H3" DisplayMemberBinding="{Binding Col3}"/>
        </GridView>
    </ListView.View>
</ListView>

Very sorry about any weird formatting or errors, just starting with this a few days ago. Here is a picture of the list when it is populated, looks as I expect it to.

Answer 1

My answer was in Travis J's comment somewhat. I knew that I may have needed to create this table in a different way so that the output of SelectedItem does not come up as anonymous type. So I have redone how the table is constructed and am now using DataTable.

private void Button_Click_1(object sender, RoutedEventArgs e)
{
    Operate op = new Operate();
    DataTable users = op.GetUser();
    if (users != null)
    {
        ResultsView.ItemsSource = users.DefaultView;
    }
}
private void ListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{

    if (ResultsView.SelectedItem != null)
    {
        DataRowView line = ResultsView.SelectedItem as DataRowView;
        string stuff = line.Row.ItemArray[2].ToString();

        MessageBox.Show(stuff);
    }
}

And this made a need for the XAML to change so that the binding is looking for a path from the datatable.

<ListView
    x:Name="ResultsView"
    Margin="5,5,5,5"
    SelectionMode="Single"
    SelectionChanged="ListView_SelectionChanged">
    <ListView.View>
        <GridView>
            <GridViewColumn Width="100" Header="H1" DisplayMemberBinding="{Binding Path=FirstName}"/>
            <GridViewColumn Width="100" Header="H2" DisplayMemberBinding="{Binding Path=LastName}"/>
            <GridViewColumn Width="100" Header="H3" DisplayMemberBinding="{Binding Path=UserName}"/>
        </GridView>
    </ListView.View>
</ListView>

I have decided not to include my own method for creating the datatable but I will provide the link that showed me the quickest way.

http://www.dotnetperls.com/datatable