Homework/Student/Regester.aspx.cs

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using dbClass;
using System.Data.SqlClient;
namespace Homework.Student
{
    public partial class Regester : System.Web.UI.Page
    {
        Alert alert = new Alert();
        SqlHelper data = new SqlHelper();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {

               
                GetJiaoyanshi();
            }
        }
        private void GetJiaoyanshi()
        {

            DropDownList1.DataSource = data.GetDataReader("select * from  Class");
            DropDownList1.DataTextField = "Bname";
            DropDownList1.DataValueField = "id";
            DropDownList1.DataBind();

        }
      
     
        protected void btnAdd_Click(object sender, EventArgs e)
        {
            string name = txtUser.Text.Trim();
            string pwd = txtPwd.Text.Trim();
            string jiaoyanshiname = DropDownList1.SelectedItem.Text.Trim();
            int jiaoyanshiId = int.Parse(DropDownList1.SelectedValue);

            if (name.Length < 1)
            {

                alert.Alertjs("帐号长度不能小于1位");

                return;
            }
            if (txtPwd.Text.Trim().Length < 1)
            {
                alert.Alertjs("密码长度不能小于1位");

                return;
            }
            SqlDataReader dr;
            dr = data.GetDataReader("select * from Student   where UserName='" + txtUser.Text + "' ");