Oracle c# Question - C# Discussion Boards

18-Aug-07 20:02

hey ,
im working on a project which involve oracle database , untill now i was testing my application when the app and the oracle server are on the same box and it was working great, but now when im trying to test the application on a different box it is a failure,
when trying to establish connection with database i get : "ORA-12514: TNS:Listener does not currently know of service..."

the connectionString looks like this:

String connstr = "server=" + Properties.Settings.Default.dbHostName +
";Persist Security Info=True;User ID=" + Properties.Settings.Default.dbUserName +
";Password=" + Properties.Settings.Default.dbpass +
";Unicode=true;";

all the info in the properties is 100% correct when i get the error...
i can ping the target machine normaly
and i get this on the oracle server Listener.log file:

19-AUG-2007 08:54:52 * (CONNECT_DATA=(SERVICE_NAME=192.168.2.100)(CID=(PROGRAM=C:\Documents and Settings\Udi\Desktop\Udi DeskTop\FileHelpersTest.exe)(HOST=PILOY-3EC14114C)(USER=Udi))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.2.101)(PORT=3662)) * establish * 192.168.2.100 * 12514
TNS-12514: TNS:listener does not currently know of service requested in connect descriptor

when i connect on the computer which the server is installed on successfuly it looks like this:

19-AUG-2007 08:44:56 * (CONNECT_DATA=(SERVICE_NAME=XE)(CID=(PROGRAM=C:\Documents and Settings\Udi\My Documents\Visual Studio 2005\Projects\FileHelpersTest\FileHelpersTest\bin\Debug\FileHelpersTest.vshost.exe)(HOST=TEHUB3R-BCEDAD0)(USER=Udi))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.2.100)(PORT=1176)) * establish * XE * 0

i think when i connect on the remote computer i dont set the SID
but i didnt find any way of setting the SID , dont know if its possible at all,
Any help is more than welcome i was googling for 10 hours about this
alot of stuff about the error but nothing that made sense to my problem
thanks.

Net

m@u18-Aug-07 23:30

18-Aug-07 23:30

Hi
first of all this doesn't have anything to do with c#. it's a Database question and should be asked in the Database Section.

you must use the "net configuration assistant" to create a local alias of the remote service. if you use the oracle .net components(provided with the oracle client software) for your connection, your connection string should look like "User ID=" + Username + ";Password=" + Password + ";Data Source=" + LocalAlias

greets
M@u

udikantz19-Aug-07 3:57

19-Aug-07 3:57

hey thanks for the fast reply , sorry for posting it here i thought its something to do with syntax , anyway i was configuring my tnsnames.ora
with the net conf assistant...

i made an alias that looks like this:

ORACLESERVER =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.2.100)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = xe)
)
)

when i do tnsping oracle server this are the results:

Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)
(HOST = 192.168.2.100)(PORT = 1521))) (CONNECT_DATA = (SERVER = SHARED) (SERVICE
_NAME = xe)))
OK (20 msec)

but when im trying to establish connection via my application
(the project im working on )
i get the folowing error:
ora-12154: TNS:could not resolve the connect identifier specific

on the connection string i was using Data Source="oracleserver";......

Net

m@u19-Aug-07 4:05

19-Aug-07 4:05

hmm.. what happens when you remove "(server = dedicated)" for OracleServer in the tnsnames.ora?

udikantz19-Aug-07 4:08

19-Aug-07 4:08

The same error occures also i may add trying
to connect with sqlplus generate the same error

Net

m@u19-Aug-07 4:16

Re: Oracle c# Question [modified]

19-Aug-07 4:16

oops sorry my fault Smile | :)

we should both better read what oracle says

your oracle ping says "server=shared"

so try to change the "server=dedicated" to "server=shared"

udikantz19-Aug-07 4:20

19-Aug-07 4:20

oooh it was my fault i was posting a ping when i was testing
a shared connection and posted the tnsnames.ora when i was testing a dedicated connection.....basicly i was trying all the possible ways to connect and it generate same error Frown | :(

man thank you realy much for your time!! , its faster than msn messenger :P

*MODIFY* : oh i was trying this testservice tool in the oracle net manager i managed to connect to my server from this tool using the
"oracleserver" service that i have created ,
maybe that info helps

-- modified at 10:27 Sunday 19th August, 2007

Net

m@u19-Aug-07 4:44

Re: Oracle c# Question [modified]

19-Aug-07 4:44

ok.. the ping said "using tnsnames to resolve blah blah blah..." as far as i know these tools do not look at the sqlnet.ora. did you configure the naming methods (second option in the net configuration assistant)? default is only local. you must tell it to use tnsnames also.

udikantz19-Aug-07 4:56

How to close XP AutoPlay Dialog

19-Aug-07 4:56

yea i did set the sqlnet.ora currently it looks like this:

SQLNET.AUTHENTICATION_SERVICES= (NTS)

NAMES.DIRECTORY_PATH= (TNSNAMES)

*MODIFY*:OK i FOUND A TEMPORARY SOLUTION!
i found out that you can set
Data Source="[hostname]/[servicename]"....

so i changed the code to DataSource="192.168.2.100/xe"
and i managed to connect via lan........ but still its anoying that i cant make that damn alias to work

THANKS FOR THE HELP!!!!

if you got any other ideas how to make it work i'll be glad to hear

thanks again
*

-- modified at 11:14 Sunday 19th August, 2007

-- modified at 11:19 Sunday 19th August, 2007

Net

Day of week

justintimberlake18-Aug-07 19:33

justintimberlake

18-Aug-07 19:33

how can i find which day of week today is.
i.e if today is Sunday then it should return 1
the problem is if it returns day of week in another language
for e.g in German they call Sunday as sonntag.

Re: Day of week

Hessam Jalali18-Aug-07 20:23

Hessam Jalali

18-Aug-07 20:23

As far as I know all calenders in System.Globalization returns DayOfWeek property as a DayOfWeek Enumaration So no language would affect it.

and casting the DayOfWeek to integer gives something like this

Sunday=0,Monday=1,...,Saturday=6

int dayNum=(int)DateTime.Now.DayOfWeek+1;

good luck

Barry Etter18-Aug-07 9:50

Barry Etter

18-Aug-07 9:50

I have a C# service that communicates to a USB flash drive. Since my program is smart enough to know when the drive is plugged in and when it's not, I don't need to have XP open the "Autorun" dialog window asking me what application to run when the drive is plugged in.

Can I somehow kill this window from my C# app? I would like to do it this way because if my application is NOT running, I DO want the XP autorun dialog to display giving users the option to install the application.

Any advice would be appreciated!

Thanks,
Barry

Barry Etter

Re: How to close XP AutoPlay Dialog

Hessam Jalali18-Aug-07 19:59

Hessam Jalali

18-Aug-07 19:59

You can disable it through registry

    const int DISABLEALL = 0xff;
    const int DISABLEALLEXECPTCDROMS = 0xdd;
    const int DISABLECDROM = 0xb1;

    RegistryKey key = Registry.CurrentUser.OpenSubKey("Software").OpenSubKey("Microsoft").OpenSubKey("Windows").OpenSubKey("CurrentVersion").OpenSubKey("Policies").OpenSubKey("Explorer", true);

    key.SetValue("NoDriveTypeAutoRun", DISABLEALLEXECPTCDROMS);
}

code for disable AutoRun for all devices is 0xff

and disable AutoRun for all devices except CD-Roms is 0xdd

disable just for CD-Roms is 0xb1

and the changes would be applied after restart

Good Luck

Adding a total column to datagrid control

Muammar©

18-Aug-07 9:27

Good evening everyone,
As the subject says, I wonder if there's a possibility to add a column to a datagrid control that calculates (count, sum, or average) multiple columns or rows..
Please advise Rose | [Rose]

Smile: A curve that can set a lot of things straight!
(\ /)
(O.o)
(><)

Not Active18-Aug-07 10:18

Not Active

18-Aug-07 10:18

You have complete control over the datagrid, so yes, there is a way to add a totals column.

One way would be to add it to your query.

SELECT field1, field2, SUM(field3) FROM...

Another way would be to handle the databinding events and populate the column at runtime.

only two letters away from being an asset

Muammar©

18-Aug-07 20:24

Mark Nischalke wrote:

SELECT field1, field2, SUM(field3) FROM...

Call me an idiot but tell me this's not creating me a totals row (not column) Confused | :confused:

Smile: A curve that can set a lot of things straight!
(\ /)
(O.o)
(><)

Not Active19-Aug-07 4:57

Not Active

19-Aug-07 4:57

If you had a table with this structure

col1 col2
1 2
10 20
20 30

then SELECT col1, col2, SUM(col1,col2)...

would produce this:
1,2,3
10,20,30
20,30,50

Of course this only gives you the totals for the rows selected. If you want some other sort of total, then adjust the SQL statement, maybe MAX, or AVE, or whatever is needed.

only two letters away from being an asset