基于角色的身份验证

   web.config

 <authentication mode="Forms">
         <forms name="app" loginUrl="bb.aspx"/>
      </authentication>
      <authorization>
         <deny users="?"/>
      </authorization>

Roles.xml

<?xml version="1.0" encoding="utf-8" ?> 
<roles>
  <user
    name="Bob"
    roles="Sales" />
  <user
    name="Jane"
    roles="Supervisor,Sales" />
</roles>

   bb.aspx

 

private void Button1_Click(object sender, System.EventArgs e)
{
System.Web.Security .FormsAuthentication .RedirectFromLoginPage(this.TextBox1 .Text,false);

}

Global.asax

 

    protected void Application_AuthenticateRequest(Object sender, EventArgs e)
        {

            string  strUserName;
            XmlDocument objRoles;
            XmlNode objNode;
            string  strXPath;

            objRoles = GetRoles();
            if ( Context.Request.IsAuthenticated )
            {
                strUserName = Context.User.Identity.Name;
                strXPath = string.Format( "user[@name='{0}']", strUserName );
                objNode = objRoles.DocumentElement.SelectSingleNode( strXPath );
                if (objNode != null)
                {
                    string[] arrRoles = objNode.Attributes["roles"].Value.Split (new char[] {','}); 
                           // 这很重要返回为  string[] 类型,要保证被分割.......
    
             

                       
                    foreach(string s in arrRoles)
                    {
                        this.Response .Write (s+ arrRoles.Length .ToString ());
                    }
                    Context.User = new GenericPrincipal( Context.User.Identity, arrRoles);
                }
            }
        }


        XmlDocument GetRoles() 
        {
            XmlDocument objRoles;

            objRoles = (XmlDocument)Context.Cache[ "Roles" ];
            if ( objRoles == null )
            {
                objRoles = new XmlDocument();
                objRoles.Load( Server.MapPath( "Roles.xml" ) );
                Context.Cache.Insert( "Roles", objRoles,  new CacheDependency( Server.MapPath( "Roles.xml" ) ) );
            }
            return objRoles;
        }

Default.aspx

if ( User.IsInRole( "Sales" ) )
            {
                Response.Write( "You have Sales permissions!" );
            //    User.Identity .AuthenticationType.ToString ();

            } 
           if (User.IsInRole ("Supervisor"))
            {
                Response.Write( "You have supervisor   permissions!" );
                
            }