如何创建三列图表？

Question

我希望显示Expr1中的数据而不是日期。 我的意思是VALUE LABEL应该由Expr1而不是Date编写。 有谁知道该怎么做？

我的桌子：

-------------------------------------
NameOfRas |     Date    |     Expr1
--------------------------------------
Food      |  07/09/2019 |       13
--------------------------------------
Hotel     |  09/09/2019 |       32
--------------------------------------
Museum    |  12/09/2019 |       52
--------------------------------------

然后用C＃编写代码：

                SqlDataReader myReader = null;
                chart4.Titles.Clear();
                chart4.Titles.Add("Общая диаграмма по датам и видам расходов");
                chart4.Titles[0].Font = new System.Drawing.Font("Utopia", 16);
                SqlCommand myCommand = new SqlCommand("SELECT Rashod.NameOfRas, SpendByDays.Date, SUM(Price) AS Expr1 FROM SpendByDays, Rashod WHERE Rashod.ID_ras = SpendByDays.ID_ras GROUP BY Rashod.NameOfRas, SpendByDays.Date", conn);
                myCommand.Parameters.Clear();
                conn.Open();
                myReader = myCommand.ExecuteReader();
                if (myReader.HasRows)
                {
                    chart4.Series.Clear();
                    chart4.Series.Add(new Series("")
                    {
                        ChartType = SeriesChartType.Column
                    });
                    chart4.Palette = ChartColorPalette.Pastel;
                    chart4.Series[0].IsValueShownAsLabel = true;
                    chart4.Series[0].Points.DataBindXY(myReader, "NameOfRas", myReader, "Date");
                    chart4.Legends[0].Enabled = true;
                    chart4.Visible = true;
                }
                else
                {
                    chart4.Visible = false;
                    MessageBox.Show("Ничего не найдено", "Information", MessageBoxButtons.OK);
                }
                myReader.Close();
                conn.Close();