oracle数据库事务不能Rollback（）的问题。（c#编码）
public   Execute_SQL_Array(ArrayList   CommandList   )   说明：CommandList   中存放一组SQL语句
{
//创建一个连接实例
if   (   ConnectDatabase   ()     <   0)
{
//连接数据库失败

return   ;
}

OracleCommand   _Command   =   new   OracleCommand     ()   ;
_Command.Connection   =mConn.Conn   ;
//创建事务
OracleTransaction   _trans;
//启动一个事务
_trans   =   mConn.Conn.BeginTransaction()   ;
_Command.Transaction   =   _trans   ;
int   i   =   0;
try
{
for   (   i   =   0;   i   <   CommandList.Count     ;   i++)
{
_Command.CommandType   =   CommandType.Text   ;
_Command.CommandText   =   CommandList[i].ToString   ();
_Command.ExecuteNonQuery()   ;
}

//提交事务
_trans.Commit   ()   ;


}
catch       (Exception   ex)
{

mResult   =   -40003   ;
mResultString   =   "执行SQL语句错误: "+ex.ToString   ()+ "\r\n "+CommandList[i].ToString   ()   ;
_trans.Rollback();   return   ;
}
finally
{
mConn.Conn.Close   ()   ;
}



}
CommandList   中存放一组SQL语句如下：
"insert   into   \ "TableList\ "   (\ "ID\ ",\ "tableName\ ",\ "tableNameCN\ ",\ "createDepart\ ",\ "createDate\ ",\ "isInUse\ ")   values   (47, 'UDT_0002_NJXX ', '年检信息 ', '0002 ',SYSDATE,0) "
"insert   into   \ "ColumnList\ "   (\ "ID\ ",\ "tableBelongTo\ ",\ "columnName\ ",\ "columnNameCN\ ",\ "dataType\ ",\ "showOrder\ ",\ "ColumnNameDescript\ ",\ "ShowMaster\ ")   values   (128, 'UDT_0002_NJXX ', 'QYZCH ', '企业注册号 ', 'varchar2(26) ',001, '企业注册号码 ',0) "
"insert   into   \ "ColumnList\ "   (\ "ID\ ",\ "tableBelongTo\ ",\ "columnName\ ",\ "columnNameCN\ ",\ "dataType\ ",\ "showOrder\ ",\ "ColumnNameDescript\ ",\ "ShowMaster\ ")   values   (129, 'UDT_0002_NJXX ', 'QYMC ', '企业名称 ', 'varchar2(100) ',002, '企业登记的名称 ',0) "
"insert   into   \ "ColumnList\ "   (\ "ID\ ",\ "tableBelongTo\ ",\ "columnName\ ",\ "columnNameCN\ ",\ "dataType\ ",\ "showOrder\ ",\ "ColumnNameDescript\ ",\ "ShowMaster\ ")   values   (130, 'UDT_0002_NJXX ', 'NJND ', '年检年度 ', 'varchar2(4) ',003, '工商年检年度 ',0) "
"insert   into   \ "ColumnList\ "   (\ "ID\ ",\ "tableBelongTo\ ",\ "columnName\ ",\ "columnNameCN\ ",\ "dataType\ ",\ "showOrder\ ",\ "ColumnNameDescript\ ",\ "ShowMaster\ ")   values   (131, 'UDT_0002_NJXX ', 'NJJG ', '年检情况 ', 'varchar2(1000) ',004, '年检情况   ',0) "
"Create   Table   \ "UDT_0002_NJXX\ "   (QYZCH   varchar2(26)   NOT   NULL,QYMC   varchar2(100)   NOT   NULL,NJND   varchar2(4)   NOT   NULL,NJJG   varchar2(1000)   NOT   NULL) "