c#报表控件Chart实例用法

  SqlConnection sqlCon = new SqlConnection();
        sqlCon.ConnectionString = "server=172.11.29.111;uid=sa;pwd=sa;database=Transport";
        sqlCon.Open();
        string sqlStr = "select year(SmsTime),month(SmsTime), count(*) from  AlarmSmsLog where datepart(year,SmsTime)='" + txt_Time.Text + "'  group by year(SmsTime),month(SmsTime) ";
        SqlDataAdapter da = new SqlDataAdapter(sqlStr, sqlCon);
        DataTable dt = new DataTable();
        da.Fill(dt);
        sqlCon.Close();
        Chart1.DataSource = dt;
        if (DropDownList2.SelectedItem.Text == "折线图")
        {
            Chart1.Series[0].ChartType = SeriesChartType.Line;
        }
        if (DropDownList2.SelectedItem.Text == "柱状图")
        {
            Chart1.Series[0].ChartType = SeriesChartType.Column;
        }

        Chart1.ChartAreas[0].AxisX.Title = "月份"; //设置x轴标题
        Chart1.ChartAreas[0].AxisY.Title = "统计次数";//设置x轴标题
        Chart1.Series[0].XValueMember = dt.Columns[1].ToString();
        Chart1.Series[0].YValueMembers = dt.Columns[2].ToString();