怎么把DNN的viewstate保存在Disk File?

虽然DNN中有个 DiskPageStatePersister,可是在Host Setting中不可以选择，而且我自己测试了下，有Bug,有时候文件名太长了，不能建立文件。那在不该DNN source code的前提下怎么才能把viewstate保存在服务器端呢？ 让我们先研究下DNN的PageBase中的 PageStatePersister属性: Protected Overrides ReadOnly Property PageStatePersister() As System.Web.UI.PageStatePersister              Get                  ' Set ViewState Persister to default (as defined in Base Class)                  Dim _persister As PageStatePersister = MyBase .PageStatePersister                  If Not DotNetNuke.Common.Globals.HostSettings( " PageStatePersister " ) Is Nothing Then                      Select Case DirectCast (DotNetNuke.Common.Globals.HostSettings( " PageStatePersister " ), String )                          Case " M "                             _persister = New CachePageStatePersister( Me )                          Case " D "                             _persister = New DiskPageStatePersister( Me )                          Case " S "                             _persister = New SessionPageStatePersister( Me )                      End Select                  End If                  Return _persister              End Get          End Property 从上面的Code中我们看到，DNN只handle "M", "D", "S"这几种，如果把viewstate保存在Page中的话，就会用.Net 默认的PageStaePersister. 接下来，我们打开Reflector看看System.Web.UI.Page是怎么写的： protected   virtual  PageStatePersister PageStatePersister{     get     {         if  ( this ._persister  ==   null )        {            PageAdapter pageAdapter  =   this .PageAdapter;             if  (pageAdapter  !=   null )            {                 this ._persister  =  pageAdapter.GetStatePersister();            }             if  ( this ._persister  ==   null )            {                 this ._persister  =   new  HiddenFieldPageStatePersister( this );            }        }         return   this ._persister;    }} 好了，我们可以看到，原来会先从PageAdapter中拿，如果找不到的话，才会用： HiddenFieldPageStatePersister. 这样我们就可以从PageAdapter下手了。 首先PageApater: public class HCPageAdapter : PageAdapter     {          public override PageStatePersister GetStatePersister()         {              return new XmlPageStatePersister( base .Page);         }     } 其中： XmlPageStatePersister的任务就是save, Load Viewstate From server disk. 然后的.Browser文件，告诉.Net要加载 HCPageAdapter < browsers >      < browser refID ="Default" >        < controlAdapters >          < adapter controlType ="DotNetNuke.Framework.PageBase"                  adapterType ="HC.DNN.Services.ViewState.HCPageAdapter" />        </ controlAdapters >      </ browser > </ browsers > Ok, 现在编译，把dll放到bin folder, .Browser文件放到App_browser folder就完成了， 这样即使下载升级DNN也不影响。 你可以从这里下载本文用到的Code: DNN store Viewstate in disk revised

转载于:https://www.cnblogs.com/isc00028/archive/2009/10/03/1577694.html