byte[]放入ViewSate Session

先用BinaryFormatter序列化成byte[],再存入viewState  
  int[,]   ma   =   .......;  
  System.Runtime.Serialization.Formatters.Binary.BinaryFormatter   bf   =   new   System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();  
  System.IO.MemoryStream   ms   =   new   System.IO.MemoryStream();  
  bf.Serialize(   ms   ,   ma);  
  ms.Seek(   0   ,   System.IO.SeekOrigin.Begin     );  
  byte[]   b   =   new   byte[   ms.Length   ];  
  ms.Read(   b   ,0   ,   b.Length   );  
  ViewState["data"]   =   b;  
  用到的时候  
  byte[]   b   =(byte[])   ViewState["data"];  
  System.Runtime.Serialization.Formatters.Binary.BinaryFormatter   bf   =   new   System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();  
  System.IO.MemoryStream   ms   =   new   System.IO.MemoryStream(   b   );  
  object   o   =   bf.Deserialize(   ms   );