如何让WPF datagrid列从头自动调整大小，以便它们都可见？

private void DataGrid_Loaded(object sender, RoutedEventArgs e)
{
    DataGrid dataGrid = (DataGrid)sender;
    dataGrid.UpdateLayout();

    double totalWidth = dataGrid.ActualWidth - dataGrid.RowHeaderActualWidth;
    foreach (DataGridColumn column in dataGrid.Columns)
    {
        if (column.Visibility == Visibility.Visible)
        {
            totalWidth -= column.MinWidth;
        }
    }

    foreach (DataGridColumn column in dataGrid.Columns)
    {
        if (column.Visibility == Visibility.Visible)
        {
            column.Width = new DataGridLength(1.0, DataGridLengthUnitType.Star);
        }
    }
}