使用in （）进行批量删除

		public bool DeleteList(string idlist )
		{
			StringBuilder strSql=new StringBuilder();
			strSql.Append("delete from pro_manifest_item ");
			strSql.Append(" where id in ("+idlist + ")  ");
			int rows=DbHelperMySQL.ExecuteSql(strSql.ToString());
			if (rows > 0)
			{
				return true;
			}
			else
			{
				return false;
			}
		}