WEBFORM上与数据库交互时产生的有关问题

 protected void Page_Load(object sender, EventArgs e)

        {

            

            Session[ID] = 1008;

            string selectStr = "select * from Basics_information where id='" + Session[ID] + "'";

            SqlDataReader read = sd.ExceRead(selectStr);

            read.Read();

            if (read.HasRows)

            {

                if (Convert.ToInt32(read["IsUpdate"]) == 3||Convert.ToInt32(read["IsUpdate"])==2)

                {

                    Label14.Visible = true;

                    TextBox1.Visible = true;

                    FirstName.Text = read["First_Name"].ToString();

                    LastName.Text = read["Last_Name"].ToString();

                    Sex.SelectedValue = read["Sex"].ToString();

                    Address.Text = read["Address_VIP"].ToString();

                    TextBox1.Text = read["City"].ToString();

                    zipCode.Text = read["Zip_Code"].ToString();

                    CompanyName.Text = read["Company_Name"].ToString();

                    Intro.Text = read["Intro"].ToString();

                    Description.Text = read["Description"].ToString();

                    TextBox1.ReadOnly = true;

                    //isRdOnly = true;

                    //isReadOnly();

                }

            }

            read.Close();

}



 protected void submit(object sender, EventArgs e)

        {


            //if (isRdOnly)

            //{

            //    isRdOnly = false;

            //}

            //else

            //{

            int isUpdate;//1为完全未填写，2为填写部分内容，3为填写完整

            if (FirstName.Text != null || LastName.Text != null || Sex.Text != null || Address.Text != null || ddlCity.SelectedValue.ToString() != null || ddlProvince.SelectedValue.ToString() != null || CompanyName.Text != null || Intro.Text != null || Description.Text != null)

            {

                if (FirstName.Text != null && LastName.Text != null && Sex.Text != null && Address.Text != null && ddlCity.SelectedValue.ToString() != null && ddlProvince.SelectedValue.ToString() != null && CompanyName.Text != null && Intro.Text != null && Description.Text != null)

                { isUpdate = 3; }