Connecting Oracle Autonomous Database to .net entity framework - oracle

Question

I need help on connecting Oracle Autonomous Database to my .net core mvc app,
has any one tried it or aware about it.
Thanks in Advance
Thank You
Shubham Pratap

Answer 1

Too long for comments.
Download and extract Oracle cloud wallet.Make a backup copy of tnsnames.ora file.Shorten the names of your autonomous database entry(this step is optional.
Add the path of cloud wallet directory in sqlnet.ora
SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
SSL_SERVER_DN_MATCH = yes
WALLET_LOCATION =
(SOURCE =
(METHOD = file)
(METHOD_DATA =
(DIRECTORY = "c:\OracleCloudWallet")
)
)
2) Shorten name of autonomous database entry of your choice in tnanames.ora (this step is optional just for convenience sake)
tnsnames.ora file (actual instance name is lengthy over 50 characters)
adw_high = (description= (retry_count=20)(retry_delay=3)(address=(protocol=tcps)(port=1522)(host=xxx))(connect_data=(service_name=xx))(security=(ssl_server_cert_dn="CN=xxx,......")))
adw_low = (description= (retry_count=20)(retry_delay=3)(address=(protocol=tcps)(port=1522)(host=xxx))(connect_data=(service_name=xxx))(security=(ssl_server_cert_dn="CN=xxx,......")))
adw_medium = (description= (retry_count=20)(retry_delay=3)(address=(protocol=tcps)(port=1522)(host=xxx))(connect_data=(service_name=xxx))(security=(ssl_server_cert_dn="CN=xxx,............")))
3)Create system variable for TNS_ADMIN and directory path to cloud wallet directroy
If you set up tns_admin variable properly
from command prompt C:\echo %TNS_ADMIN% should print correct path
4)If all above steps setup properly then you should be able tnsping each entry in tnsnames.ora
Connection string in your code shoulld be like this
// Configure ODP.NET connection string
//Data Source is nothing but adb entry in tnsnames.ora i,e adw_high
optionsBuilder.UseOracle(#"User Id=xxx;Password=xxxxxx;Data Source=adw_high");
// Set TnsAdmin value to directory location of tnsnames.ora and sqlnet.ora files
OracleConfiguration.TnsAdmin = #"c:\OracleCloudWallet";
// Set WalletLocation value to directory location of the ADB wallet (i.e. cwallet.sso)
OracleConfiguration.WalletLocation = #"c:\OracleCloudWallet";
Edit:-
Today Fired up ADW instance and connected without any problem.I have Oracle 19c local instance.
ASP.NET Core Web Application relevant code
OracleConfiguration.TnsAdmin = #"C:\app\oracle\product\19.3.0\db_1\network\admin";
OracleConfiguration.WalletLocation = #"C:\app\oracle\product\19.3.0\db_1\network\admin";
string conString = "User Id=scott;Password=xxxx;Data Source=adw_low";