อยากเก็บค่าจาก multiple textbox ลงดาต้าเบสโดยใช้อาเรย์ทำยังไงดีค่ะ รบกวนพี่ๆช่วยดูโค้ดให้ทีค่ะ

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            int i;
            Label lblBr;
            TextBox age1;
            TextBox age2;
            TextBox year1;
            TextBox year2;
            TextBox year3;
            TextBox year4;
            for (i = 1; i <= Convert.ToInt32(this.DropDownList1.SelectedItem.Value); i++)
            {
                age1 = new TextBox();
                age2 = new TextBox();
                year1 = new TextBox();
                year2 = new TextBox();
                year3 = new TextBox();
                year4 = new TextBox();

                age1.Width = 30;
                age2.Width = 30;
                year1.Width = 70;
                year2.Width = 70;
                year3.Width = 70;
                year4.Width = 70;

                age1.ID = "age1" + i;
                age2.ID = "age2" + i;
                year1.ID = "year1" + i;
                year2.ID = "year2" + i;
                year3.ID = "year3" + i;
                year4.ID = "year4" + i;

                lblBr = new Label();
                lblBr.Text = "<br>";
                this.panel.Controls.Add(age1);
                this.panel.Controls.Add(age2);
                this.panel.Controls.Add(year1);
                this.panel.Controls.Add(year2);
                this.panel.Controls.Add(year3);
                this.panel.Controls.Add(year4);
                this.panel.Controls.Add(lblBr);
                if (Convert.ToInt32(this.DropDownList1.SelectedItem.Value) >= 1)
                {
                    this.panel.Visible = true;
                    this.upload.Visible = true;
                }
                else
                {
                    this.panel.Visible = false;
                    this.upload.Visible = false;
                }

            }
        }