c# - Sort a wpf datagrid programmatically

Question

Is there a way to sort a WPF DataGrid programmatically (for example, like if I clicked on my first column)?

Is there a way to simulate this click?

Here is my code:

Collection_Evenements = new ObservableCollection<Evenement>();
 
Collection_Evenements = myEvenement.GetEvenementsForCliCode(App.obj_myClient.m_strCode);
Collection_Evenements.CollectionChanged += Collection_Evenements_CollectionChanged;
myDataGridEvenements.ItemsSource = Collection_Evenements;
 
System.Data.DataView dv = (System.Data.DataView)myDataGridEvenements.ItemsSource;
dv.Sort = "strEvtType";
            
myDataGridEvenements.Focus();
myDataGridEvenements.SelectedIndex = 0;
myDataGridEvenements.MoveFocus(new TraversalRequest(FocusNavigationDirection.Next));

I don't know why, but the line dv.Sort = "strEvtType"; causes a strange thing, my Window shows up and the program doesn't continue to execute the next lines, nevertheless, I don't see the sort!

Answer 1

voo's solution was not working for me, ItemsSource was null, most likely because it was not directly set, but bound. All other solutions I found here at StackOverflow were dealing with sorting the Model only, but the DataGrid header was not reflecting to the sort.

Here's a proper solution based on the incomplete script here: http://dotnetgui.blogspot.co.uk/2011/02/how-to-properly-sort-on-wpf-datagrid.html

public static void SortDataGrid(DataGrid dataGrid, int columnIndex = 0, ListSortDirection sortDirection = ListSortDirection.Ascending)
{
    var column = dataGrid.Columns[columnIndex];

    // Clear current sort descriptions
    dataGrid.Items.SortDescriptions.Clear();

    // Add the new sort description
    dataGrid.Items.SortDescriptions.Add(new SortDescription(column.SortMemberPath, sortDirection));

    // Apply sort
    foreach (var col in dataGrid.Columns)
    {
        col.SortDirection = null;
    }
    column.SortDirection = sortDirection;

    // Refresh items to display sort
    dataGrid.Items.Refresh();
}

In case of your code, it can be used like this:

SortDataGrid(myDataGridEvenements, 0, ListSortDirection.Ascending);

Or by using the default parameter values, simply:

SortDataGrid(myDataGridEvenements);