ASP.NET_登录例子

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using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Data.SqlClient;

using System.Text.RegularExpressions;

using System.Windows.Forms;

//.net Login方法例子;

protected void Button1_Click(object sender, EventArgs e)

{

Session["name"] = tname.Text;

if (!rb1.Checked & !rb2.Checked) //radiocheckbox 1.2

{

MessageBox.Show("请选择用户身份");

}

else if (rb1.Checked)

{

string cmdtext = "select * from Gltable where userName='" + this.tname.Text +"' and passWord='" + this.tpass.Text + "'"; //数据搜索语句;

SqlConnection con =new SqlConnection("Server=localhost;database=qcwx;uid=sa;pwd=sasasa");

con.Open();

SqlCommand cmd =new SqlCommand(cmdtext, con);

try

{

SqlDataReader dr = cmd.ExecuteReader();

if (dr.Read())

{

MessageBox.Show("登录成功！");

sqlconn.Close();

Response.Redirect("jmmuban.aspx");//跳转;

}

else

{

MessageBox.Show("用户名或密码错误");

dr.Close();

con.Close();

}

catch(Exception err)

{

Response .Write(err); //异常捕获;

}

else //未选择身份处理;

{

string cmdtext1 ="select * from Staff where s_logname='" + this.tname.Text + "' and s_password='" +this.tpass.Text + "'";