Why ItemContainerGenerator.ContainerFromIndex() returns null and how to avoid this behavior?

Question

I\'m using this snippet to analyze the rows I\'ve selected on a datagrid.

for (int i = 0; i < dgDetalle.Items.Count; i++)
{
    DataGridRow row = (DataGri         


        

Answer 1

In addition to other answers: items aren't available in constructor of the control class (page / window / etc).

If you want to access them after created, use Loaded event:

public partial class MyUserControl : UserControl
{
    public MyUserControl(int[] values)
    {
        InitializeComponent();

        this.MyItemsControl.ItemsSource = values;

        Loaded += (s, e) =>
        {
            for (int i = 0; i < this.MyItemsControl.Items.Count; ++i)
            {
                // this.MyItemsControl.ItemContainerGenerator.ContainerFromIndex(i)
            }
        };
    }
}