序列化 
//序列化 
public     byte[]   SerializeObject(object   pObj) 
{ 
if(pObj   ==   null) 
return   null; 
System.IO.MemoryStream   _memory   =   new                                   System.IO.MemoryStream();
BinaryFormatter   formatter   =   new   BinaryFormatter(); 
formatter.Serialize(_memory,pObj); 
_memory.Position   =   0; 
byte[]   read   =   new   byte[_memory.Length]; 
_memory.Read(read,0,read.Length); 
_memory.Close(); 
return   read; 
}

 如果你只是直接将信息保存到数据库,沒有必要序列化 
string   conn_str   =   System.Configuration.ConfigurationSettings.AppSettings[ "conn_str "].ToString(); 
                        string   sREQUEST_ID   =   Session[ "REQUEST_ID "].ToString(); 
OleDbConnection   cn   =   new   OleDbConnection(conn_str); 
cn.Open(); 
OleDbCommand   cmd   =   new   OleDbCommand( "UPDATE   REQUEST_MASTER   SET   REQUEST_FILE=?   WHERE   REQUEST_ID= "   +int.Parse(sREQUEST_ID),cn); 
cmd.Parameters.Add( "REQUEST_FILE ",OleDbType.Binary);

if(!sFileName1.Equals( " ")) 
{ 
try 
{ 
FileStream   fs   =   new   FileStream(Path   +sFileName1,   FileMode.OpenOrCreate,   FileAccess.Read); 
byte[]   MyData1=   new   byte[fs.Length]; 
fs.Read(MyData1,   0,   System.Convert.ToInt32(fs.Length)); 
fs.Close(); 
cmd.Parameters[ "REQUEST_FILE "].Value   =   MyData1; 
} 
catch(Exception   err) 
{ 
string   s   =   err.Message; 
} 
} 
else 
{ 
cmd.Parameters[ "REQUEST_FILE "].Value   =   MyData; 
} 
try   
{ 

cmd.ExecuteNonQuery();   
}
catch(Exception   e1) 
{ 
} 
finally 
{ 
cn.Close(); 
}