Connect Oracle to read data

Not how to use Oracle, and is in the local government rent intranet internal estimate is the cause of the firewall is not even in the virtual machine Oracle, just start a lot of trouble to find problems, and now give up the use of direct database, write down to use it

    Public classLoadData {/// <summary>        ///         /// </summary>        /// <returns></returns>         Public Static stringGetcunliangfang (stringIdno) {            stringOraclepath = Application.startuppath +@"\lib"; Environment.setenvironmentvariable ("PATH", Oraclepath, environmentvariabletarget.process); Environment.setenvironmentvariable ("Nls_lang","simplified Chinese_china. ZHS16GBK", environmentvariabletarget.process); stringRTN =string.            Empty; //string connstring = "PROVIDER=ORAOLEDB.ORACLE.1; User Id=tax; Password=tax;data source= (DESCRIPTION = (address_list= (ADDRESS = (PROTOCOL = TCP) (HOST = * * * *) (PORT = * * * *))) (Connect_d ATA = (service_name = ORCL))) ";            stringConnString ="Persist Security info=true; User Id=tax; Password=tax; Unicode=true;data source= (DESCRIPTION = (Address_list = (ADDRESS = (PROTOCOL = TCP) (HOST =140.28.21.14) (PORT = 1521)) ( Connect_data = (service_name = ORCL));"; OracleConnection Conn=NewOracleConnection (connstring); Conn.            Open (); stringsql =string. Format ("SELECT * from Fdcjy_jyfcxx_hz", Idno);//WHERE id_sno= ' {0} 'OracleCommand cmd =NewOracleCommand (SQL, conn); OracleDataReader Dr=cmd.            ExecuteReader (); if(Dr. Read ()) {ArrayList arr=NewArrayList (); Arr. ADD (dr["OC_CQRZJLX"]);//Seller Document Type codeArr. ADD (dr["OC_CQRLXDH"]);//Contact PhoneArr. ADD (dr["Oc_cqrgj"]);//Seller Nationality CodeArr. ADD (dr["Oc_cqrlxdz"]);//Seller Addressarr. ADD (dr["OC_MFXM"]);//"Buyer's nameArr. ADD (dr["OC_MFZJLX"]);//"Buyer's document typeArr. ADD (dr["OC_MFZJHM"]);//ID NumberArr. ADD (dr["Oc_mfgj"]);//Nationality CodeArr. ADD (dr["OC_MFLXDH"]);//Contact PhoneArr. ADD (dr["Oc_mflxdz"]);//Contact Address//Housing InformationArr. ADD (dr["DT_HTQDRQ"]. ToString ());//date of contract signingArr. ADD (dr["Oc_qxdm"]);//Administrative DivisionsArr. ADD (dr["Oc_jdxz"]);//Street TownshipArr. ADD (dr["Oc_fwzl"]);//the place where the house belongs, has the defaultArr. ADD (dr["Oc_fczh"]);//House Deed No.Arr. ADD (dr["Oc_htzj"]. ToString ());//Contract AmountArr. ADD (dr["OC_FCLX"]);//Property TypeArr. ADD (dr["Oc_fczh"]);//House Building NumberArr. ADD (dr["OC_SZLC"]);//FloorArr. ADD (dr["OC_SCJYFS"]);//last access to housing                ////arr. ADD (dr["OC_HTZJ"]);//Trading Price--Temporary useArr. ADD (dr["DT_SCJYSJ"]. ToString ());//Last Trading TimeArr. ADD (dr["OC_FWTC"]);//Last home Acquisition costArr. ADD (dr["OC_JYLX"]);//type of transactionArr. ADD (dr["OC_BZ"]);//NotesRTN =string. Join (",", (string[]) arr. ToArray (typeof(string))); } conn.            Close (); Cmd.            Dispose (); returnRtn; }    }

Connect Oracle to read data