程序代码：

//在数据表中添加数据列
        string MySQL = "ALTER TABLE 商品清单 ADD [检验员] [varchar] ([color=#800000; font-weight: bold]50[/color]) NULL;";
        SqlConnection MyConnection = new SqlConnection("Data Source = .;Database = MyDatabase;Integrated Security=SSPI");
        SqlCommand MyCommand = new SqlCommand(MySQL, MyConnection);
        try
        {
            MyCommand.Connection.Open();
            MyCommand.ExecuteNonQuery();
            MessageBox.Show("成功在“商品清单”数据表中添加数据列", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }
        finally
        {
            MyConnection.Close();
        }