在form中的构造中已经在VIEW中显示初恋，现在要做的是在ComboBox显示数据库第一行的所有内容，并在选择相当内容后在VIEW能显示相关内容，

 public Form1()
        {
            InitializeComponent();
        

            Querys q = new Querys();
            string sqlx = "time";
            //如果发生改变，从ComboBOX获取改变值，改变
            string sqly = "svcount";
            DataTable dt = new DataTable();
            int[] x = new int[70];
            DateTime[] y=new DateTime[70];
          
            int n = 0;
          
            dt=q.Query(sqlx,500);

            for (int i = 0; i <70; i++)
            {

                 y[i] = (DateTime)dt.Rows[i][n];
              
            }
            //Y轴改变，判断datatable中的字段名

            dt = q.Query(sqly, 500);
            for (int i = 0; i < 70; i++)
            {
                x[i] = (int)dt.Rows[i][0];
            }                    
                                //(纵坐标，横坐标)
            LinePlot line3 = new LinePlot(x, y);
            plotSurface.Add(line3);
        }
        /*        
         *
         * 将是数据库中第一行所有内容在ComboBox中下拉显示
         */
        private void Form1_Load(object sender, EventArgs e)
        {
            string sql = "*";
            Querys q = new Querys();
            DataTable dt = q.Query(sql, 500);

            selectup.DataSource = dt;

        }
     
        private void select_SelectedIndexChanged(object sender, EventArgs e)
        {
        }