<configuration>
<system.web>
<!--设置Forms身份验证-->
<authentication mode="Forms">
<forms loginUrl="Login.aspx" name="MyWebApp.APSXAUTH" path="/" protection="All" timeout="30"/>
</authentication>
<authorization>
<allow users="*"/>
</authorization>
</system.web>
</configuration>
<!--设置Admin目录的访问权限-->
<location path="Admin">
<system.web>
<authorization>
<allow roles="Admin"/>
<deny users="?"/>
</authorization>
</system.web>
</location>
<!--设置Users目录的访问权限-->
<location path="Users">
<system.web>
<authorization>
<allow roles="User"/>
<deny users="?"/>
</authorization>
</system.web>
</location>

protected void btnLogin_Click(object sender, EventArgs e)
{
//Forms身份验证初始化
FormsAuthentication.Initialize();
//验证用户输入并得到登录用户，txtName是用户名称，txtPassword是登录密码
UserModel um = ValidUser(txtName.Text.Trim(),txtPassword.Text.Trim());
if (um != null)
{
//创建身份验证票据
FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(1,
um.Name,
DateTime.Now,
DateTime.Now.AddMinutes(30),
true,
um.Roles,//用户所属的角色字符串
FormsAuthentication.FormsCookiePath);
//加密身份验证票据
string hash = FormsAuthentication.Encrypt(ticket);
//创建要发送到客户端的cookie
HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, hash);
if (ticket.IsPersistent)
{
cookie.Expires = ticket.Expiration;
}
//把准备好的cookie加入到响应流中
Response.Cookies.Add(cookie);
//转发到请求的页面
Response.Redirect(FormsAuthentication.GetRedirectUrl(um.Name,false));
}
else
{
ClientScriptManager csm = this.Page.ClientScript;
csm.RegisterStartupScript(this.GetType(), "error_tip", "alert('用户名或密码错误！身份验证失败！');", true);
}
}
//验证用户
private UserModel ValidUser(string name, string password)
{
return new UserService().Validate(name, password);
}

//改造原来的User，给其添加一个用户所属的角色数据
protected void Application_AuthenticateRequest(object sender, EventArgs e)
{
if (HttpContext.Current.User != null )
{
if (HttpContext.Current.User.Identity.IsAuthenticated)
{
if (HttpContext.Current.User.Identity is FormsIdentity)
{
FormsIdentity id = (FormsIdentity)HttpContext.Current.User.Identity;
FormsAuthenticationTicket ticket = id.Ticket;
string userData = ticket.UserData;
string[] roles = userData.Split(',');
//重建HttpContext.Current.User，加入用户拥有的角色数组
HttpContext.Current.User = new GenericPrincipal(id, roles);
}
}
}
}

protected void Page_Load(object sender, EventArgs e)
{
//判断通过身份验证的用户是否有权限访问本页面
FormsIdentity id = (FormsIdentity)HttpContext.Current.User.Identity;
//判断通过身份验证的用户是否是Admin角色
if (!id.Ticket.UserData.Contains("Admin"))
{
//跳转到访问权限不够的错误提示页面
Response.Redirect("~/Error/AccessError.htm", true);
}
}
//安全退出按钮的代码
protected void btnExit_Click(object sender, EventArgs e)
{
//注销票据
FormsAuthentication.SignOut();
ClientScriptManager csm = this.Page.ClientScript;
csm.RegisterStartupScript(this.GetType(), "exit_tip", "alert('您已经安全退出了！');", true);
}

protected void Page_Load(object sender, EventArgs e)
{
//判断通过身份验证的用户是否有权限访问本页面
FormsIdentity id = (FormsIdentity)HttpContext.Current.User.Identity;
//判断通过身份验证的用户是否是User角色
if (!id.Ticket.UserData.Contains("User"))
{
//跳转到访问权限不够的错误提示页面
Response.Redirect("~/Error/AccessError.htm", true);
}
}
//安全退出按钮的代码
protected void btnExit_Click(object sender, EventArgs e)
{
//注销票据
FormsAuthentication.SignOut();
ClientScriptManager csm = this.Page.ClientScript;
csm.RegisterStartupScript(this.GetType(), "exit_tip", "alert('您已经安全退出了！');", true);
}