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

The DataGrid is virtualizing the items, the respective rows (i.e. containers) are only created when the row is in view.

You could either turn off virtualization (which makes the first time loading very slow if you have many items, also the memory usage will be higher) or you just iterate over the data and check the values of the data objects' properties which should be bound to the data-grid. Usually you should not need the UI elements at all...