ASP.NET—From验证：全部代码及讲解_Asp.Net开发技巧

时间：2010-08-31 来源：缘分星空

关于Forms验证的文章网上千百篇，但我花了1天半的时间学会了“一点点”，
现在把代码分享出来，希望对像我一样的初学者所有帮助，也希望高手给指点一下：

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Step 1：新建数据库(库：MyForms ；表：users ；字段：ID，userName, userPwd)；
Step 2：新建网站，web.config 的文件全部代码如下：

web.config 的全部代码
<?xml version="1.0"?>
<configuration>
    <appSettings/>
    <connectionStrings/>

    <system.web>
        <compilation debug="true"/>

    <sessionState cookieless="AutoDetect"/>
    

        <authentication mode="Forms">
      <forms name="CookieName" loginUrl="login.aspx" protection="All"></forms>
      
    </authentication>

    <authorization>
      <deny users="?"/>
    </authorization>

    <customErrors mode="On" defaultRedirect="GenericErrorPage.htm">
        <error statusCode="403" redirect="NoAccess.htm" />
        <error statusCode="404" redirect="FileNotFound.htm" />
    </customErrors>

    </system.web>

</configuration>

Step 3：添加一个 login.aspx 页面；拖2个 TextBox ，1个Button 和1个CheckBox ；
并将CheckBox 的text 属性设为：“是否保存Cookis "；
Step 4：login.aspx 的隐藏代码如下：

login 全部隐藏代码
using System;
using System.Data;
using System.Configuration;
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; //导入命名空间

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

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string userName = TextBox1.Text.Trim();
        string userPwd = TextBox2.Text.Trim();
        SqlConnection con = new SqlConnection("Server=.;Database=MyForms;User ID=sa;Password=123456");
        con.Open();
        SqlCommand cmd = new SqlCommand("select count(*) from users where userName='" + userName + "' and userPwd='" + userPwd + "'", con);
        int count = Convert.ToInt32(cmd.ExecuteScalar());
        if (count > 0)
        {
            System.Web.Security.FormsAuthentication.SetAuthCookie(this.TextBox1.Text, this.CheckBox1.Checked);
            Response.Redirect("Default.aspx");
            //上面两行,也可以换成下面一行,如通过验证则直接转向请求的页面,而不需要Responsel.Redirect("");
            //System.Web.Security.FormsAuthentication.RedirectFromLoginPage(this.TextBox1.Text, false);
        }

        else
        {
            Response.Write("用户不合法");
        }
    }
}

Step 5：拖一个Button 到 Default.aspx 上，将其text 属性设为"登出",其事件代码如下：

Button 事件代码
protected void Button1_Click(object sender, EventArgs e)
    {
        System.Web.Security.FormsAuthentication.SignOut();
    }

http://www.cnblogs.com/yoyebina/archive/2006/12/03/580121.html

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