WPF 后台设置DataGrid选中多行

        private void SetSelectIndex(List<int> listIndex)
        {
            try
            {
                foreach (var i in listIndex)
                {
                    if (i >= datagridSig.Items.Count)
                        continue;

                    DataGridRow row = (DataGridRow)datagrid.ItemContainerGenerator.ContainerFromIndex(i);
                    row.IsSelected = true;
                }
            }
            catch (Exception ex)
            {
                
            }
        }