如何将一个EXCEL文件作为二进制文件存入数据库，再把它读取打开？

下面的代码把数据库中的image类型字段还原为excel文件。  
  数据库用的是sql   server自带的pubs  
  Dim   cn   As   ADODB.Connection  
  Dim   rs   As   ADODB.Recordset  
  Dim   mstream   As   ADODB.Stream  
   
  Set   cn   =   New   ADODB.Connection  
  cn.ConnectionString   =   "Provider=SQLOLEDB.1;Persist   Security   Info=True;User   ID=sa;Password=sa;"   _  
          &   "Initial   Catalog=pubs;Data   Source=MyServer"  
  cn.OpenSet   rs   =   New   ADODB.Recordset  
  rs.Open   "Select   *   from   pub_info",   cn,   adOpenKeyset,   adLockOptimistic  
   
  Set   mstream   =   New   ADODB.Stream  
  mstream.Type   =   adTypeBinary  
  mstream.Open  
  mstream.Write   rs.Fields("logo").Value  
  mstream.SaveToFile   "c:publogo.xls",   adSaveCreateOverWrite  
   
  rs.Close  
  cn.Close  
   
  下面的代码把一Excel保存到数据库中Set   cn   =   New   ADODB.Connection  
  cn.Open   "Provider=SQLOLEDB.1;Persist   Security   Info=True;User   ID=sa;Password=sa;"   _  
          &   "Initial   Catalog=pubs;Data   Source=MyServer"  
   
  Set   rs   =   New   ADODB.Recordset  
  rs.Open   "Select   *   from   pub_info",   cn,   adOpenKeyset,   adLockOptimistic  
   
   
  rs.AddNew  
   
  Set   mstream   =   New   ADODB.Stream  
  mstream.Type   =   adTypeBinary  
  mstream.Open  
  mstream.LoadFromFile   txtEXcelPath  
  rs.Fields("pub_id")   =   "……"   在pubs库中，这个字段是主键，需要修改一个有效值  
   
  rs.Fields("logo").Value   =   mstream.Read  
  rs.Update  
   
  rs.Close  
  cn.Close  
   
  该代码来自MSDN