WebSite/Login.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 System.Data.SqlClient;

public partial class Administrator_Login : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }


    protected void btnSave_Click(object sender, EventArgs e)
    {

        string struid = txtUserName.Value;
        string strpwd = pwdinput.Value;

        if (struid.Equals(""))
        {
            Response.Write("<script>alert('用户名不能为空!');window.location='Login.aspx';</script>");
            return;
        }
        if (strpwd.Equals(""))
        {
            Response.Write("<script>alert('密码不能为空!');window.location='Login.aspx';</script>");
            return;
        }
        if (txtVdate.Value == "")
        {
            Response.Write("<script>alert('验证码为空!');window.location='Login.aspx';</script>");
            return;
        }
        if (Session["ValidateNumber"] == null)
        {
            Response.Write("<script>alert('验证码过期.');window.location='Login.aspx';</script");
            return;
        }
        if (txtVdate.Value != Session["ValidateNumber"].ToString())
        {
            Response.Write("<script>alert('验证码错误');window.location='Login.aspx';</script");
            return;
        }
        SqlConnection objDbConn = new SqlConnection(Maticsoft.DBUtility.PubConstant.ConnectionString);
        try
        {
            string strSql = "select * from DB_User where UserLogin=@UserName and UserPass=@Password ";
            objDbConn.Open();
            SqlDataAdapter bb = new SqlDataAdapter(strSql, objDbConn);
            bb.SelectCommand.Parameters.Add("@UserName", struid);
            bb.SelectCommand.Parameters.Add("@Password", strpwd);
            DataSet objDataSet = new DataSet();
            bb.Fill(objDataSet);