Problem Retrive Item From Database in Combobox inside a DataGridView in Windows application using C#

  private void DGMeneber_DataError(object sender, DataGridViewDataErrorEventArgs e)
        {
            if (e.Context == (DataGridViewDataErrorContexts.Formatting | DataGridViewDataErrorContexts.PreferredSize))
            {
                e.ThrowException = false;
            }

        }