【从元数据】究竟是什么

Question

网上有好几种解释，但我觉得都是元数据的解释。有人说应该理解成“从--元数据”来。
这里有一个例子。
这个有[从元数据]的标志，上面还带了一个锁一样的图标using ASP;
using System;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;namespace MB.TheBeerHouse.UI
{
    public class TemplateMaster : MasterPage
    {
        protected AppearanceEditorPart AppearanceEditorPart1;
        protected BehaviorEditorPart BehaviorEditorPart1;
        protected CatalogZone CatalogZone1;
        protected WebPartZone CenterZoneBottom;
        protected WebPartZone CenterZoneBottomLeft;
        protected WebPartZone CenterZoneBottomRight;
        protected WebPartZone CenterZoneTop;
        protected WebPartZone CenterZoneTopLeft;
        protected WebPartZone CenterZoneTopRight;
        protected DeclarativeCatalogPart DeclarativeCatalogPart1;
        protected EditorZone EditorZone1;
        protected LayoutEditorPart LayoutEditorPart1;
        protected ContentPlaceHolder LeftContent;
        protected WebPartZone LeftZoneBottom;
        protected WebPartZone LeftZoneTop;
        protected Localize locTemplateMonster1;
        protected Localize locTemplateMonster2;
        protected LoginView LoginView1;
        protected HtmlForm Main;
        protected ContentPlaceHolder MainContent;
        protected Menu mnuFooter;
        protected Menu mnuHeader;
        protected ASP.controls_newsletterbox_ascx NewsletterBox1;
        protected PageCatalogPart PageCatalogPart1;
        protected ASP.controls_personalizationmanager_ascx PersonalizationManager1;
        protected ASP.controls_pollbox_ascx PollBox1;
        protected ASP.controls_pollbox_ascx pollCurrent;
        protected PropertyGridEditorPart PropertyGridEditorPart1;
        protected ContentPlaceHolder RightContent;
        protected WebPartZone RightZoneBottom;
        protected WebPartZone RightZoneTop;
        protected ASP.controls_shoppingcartbox_ascx ShoppingcartBox1;
        protected SiteMapDataSource SiteMapDataSource1;
        protected SiteMapPath SiteMapPath1;
        protected Image TemplateMonsterBanner;
        protected ASP.controls_themeselector_ascx ThemeSelector1;        public TemplateMaster();        protected global_asax ApplicationInstance { get; }
        public bool EnablePersonalization { get; set; }        protected ProfileCommon Profile { get; }        protected void Page_Load(object sender, EventArgs e);
    }
}
这个是普通的文件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;namespace MB.TheBeerHouse.UI
{
   public partial class TemplateMaster : System.Web.UI.MasterPage
   {
      private bool _enablePersonalization = false;
      public bool EnablePersonalization      {
         get { return _enablePersonalization; }
         set
         {
            _enablePersonalization = value;
            PersonalizationManager1.Visible = (this.Page.User.Identity.IsAuthenticated && value);
         }
      }      protected void Page_Load(object sender, EventArgs e)
      {
         if (!this.Page.User.Identity.IsAuthenticated)
            PersonalizationManager1.Visible = false;
      }
   }
}

Answer 1

没标示好，重写关键的两句using ASP;
using System;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;namespace MB.TheBeerHouse.UI
{
    public class TemplateMaster : MasterPage
    {
        protected AppearanceEditorPart AppearanceEditorPart1;
        protected BehaviorEditorPart BehaviorEditorPart1;
        protected CatalogZone CatalogZone1;
        protected WebPartZone CenterZoneBottom;
        protected WebPartZone CenterZoneBottomLeft;
        protected WebPartZone CenterZoneBottomRight;
        protected WebPartZone CenterZoneTop;
        protected WebPartZone CenterZoneTopLeft;
        protected WebPartZone CenterZoneTopRight;
        protected DeclarativeCatalogPart DeclarativeCatalogPart1;
        protected EditorZone EditorZone1;
        protected LayoutEditorPart LayoutEditorPart1;
        protected ContentPlaceHolder LeftContent;
        protected WebPartZone LeftZoneBottom;
        protected WebPartZone LeftZoneTop;
        protected Localize locTemplateMonster1;
        protected Localize locTemplateMonster2;
        protected LoginView LoginView1;
        protected HtmlForm Main;
        protected ContentPlaceHolder MainContent;
        protected Menu mnuFooter;
        protected Menu mnuHeader;
        protected ASP.controls_newsletterbox_ascx NewsletterBox1;
        protected PageCatalogPart PageCatalogPart1;
        protected ASP.controls_personalizationmanager_ascx PersonalizationManager1;
        protected ASP.controls_pollbox_ascx PollBox1;
        protected ASP.controls_pollbox_ascx pollCurrent;
        protected PropertyGridEditorPart PropertyGridEditorPart1;
        protected ContentPlaceHolder RightContent;
        protected WebPartZone RightZoneBottom;
        protected WebPartZone RightZoneTop;
        protected ASP.controls_shoppingcartbox_ascx ShoppingcartBox1;
        protected SiteMapDataSource SiteMapDataSource1;
        protected SiteMapPath SiteMapPath1;
        protected Image TemplateMonsterBanner;
        protected ASP.controls_themeselector_ascx ThemeSelector1;        public TemplateMaster();        protected global_asax ApplicationInstance { get; }
        public bool EnablePersonalization { get; set; }   //就是它，很简单的一句，注意对应下面的看
        protected ProfileCommon Profile { get; }        protected void Page_Load(object sender, EventArgs e);
    }
}
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;namespace MB.TheBeerHouse.UI
{
   public partial class TemplateMaster : System.Web.UI.MasterPage
   {
      private bool _enablePersonalization = false;
      public bool EnablePersonalization  //就是这个属性了，下面写得很全
      {
         get { return _enablePersonalization; }
         set
         {
            _enablePersonalization = value;
            PersonalizationManager1.Visible = (this.Page.User.Identity.IsAuthenticated && value);
         }
      }      protected void Page_Load(object sender, EventArgs e)
      {
         if (!this.Page.User.Identity.IsAuthenticated)
            PersonalizationManager1.Visible = false;
      }
   }
}