DataGridView grid = (DataGridView)sender;
DataGridViewRow row = grid.Rows[e.RowIndex];
DataGridViewColumn col = grid.Columns[e.ColumnIndex];
if (row.DataBoundItem != null && col.DataPropertyName.Contains("."))
{
     string[] props = col.DataPropertyName.Split('.');
     PropertyInfo propInfo = row.DataBoundItem.GetType().GetProperty(props[0]);
     if (propInfo != null)
     {
          object val = propInfo.GetValue(row.DataBoundItem, null);
          for (int i = 1; i < props.Length; i++)
          {
              propInfo = val.GetType().GetProperty(props[i]);
              val = propInfo.GetValue(val, null);
           }
           e.Value = val;
      }
}