strcmd = "INSERT INTO MyUploadTable (filename,filesize) Values(:filename, :filesize)";
OleDbCommand objCommand=new OleDbCommand(strcmd,conn);
objCommand.Parameters.Add(":filename",System.Data.OleDb.OleDbType.VarChar).Value = filename;
objCommand.Parameters.Add(":filesize",System.Data.OleDb.OleDbType.Numeric).Value = theFile.ContentLength;
objCommand.ExecuteNonQuery();    
老是提示：System.Data.OleDb.OleDbException:   在执行命令过程中，发生了一个或多个错误。   ORA-00936:   缺少表达式