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So...I am running Visual Studio 2010 on a new Windows 7 machine. I have a server on the network running Windows 2003 server with Oracle 9i and 10g installed. I am trying to connect to the Oracle 10g database on that server from a new .Net application on the Windows 7 machine. This is the error I keep getting:
{"System.Data.OracleClient requires Oracle client software version 8.1.7 or greater."}
I Googled the error and I have tried the following suggestions:
1. Changed the administration folder permissions for Read and Execute for Authenticated Users (with reboot).
2. Made changes to the tnsNames.ora file
3. Made changes to the sqlnet.ora file as follows; NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
4. Changed the listening port to the following different port numbers (1521,1522,8081).
This is the connection code with the various config strings that I have tried (Tel1 is the server name):
string CONNSTR =
"Data Source=//Tel1:1522;User Id=Patrick;Password=Pass;Integrated Security=no";
public Oracle()
{
InitializeComponent();
}
private void TestMyOracleConnection()
{
OracleConnection Conn = new OracleConnection(CONNSTR);
try
{
Conn.Open();
MessageBox.Show("Connection Established", "Success");
}
catch (OracleException ex)
{
MessageBox.Show(ex.Message, "Oracle Connection Failed!");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Oracle Connection Failed!");
}
finally
{
Conn.Close();
MessageBox.Show("Connection Closed", "Success");
}
}
private void buttonTestConnection_Click(object sender, EventArgs e)
{
TestMyOracleConnection();
}
I am exasperated with this. I never have a connection issue with MS SQL or MySQL...in fact, I made connections from the same .Net program to both of these DB's both over the network and to a remotely hosted server and it works perfectly. Obviously, my knowledge of Oracle leaves much to be desired. I would appreciate any idea's or suggestions. Thank you...Pat
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I beleive your dev machine needs the Oracle client installed (ours did) not just the tsnames file.
One of the benefits f going to WCF is that I only need to deal with the server connection to Oracle, not all the clients
Never underestimate the power of human stupidity
RAH
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RAH,
Thank you for your solution proposal. Please see message to Dilbert below...and thank you for your time and help...Pat.
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Do I understand you correct that you have both oracle 9i and 10g on the same server.
While possible, it's a mess to configure, and in IMAO quite pointless.
Ok, that was a side track.
The error message you get is quite straight forward (for once).
Mycroft is probably quite correct, your Oracle client software isn't properly installed.
"When did ignorance become a point of view" - Dilbert
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Hello Dilbert
Thank you for your input. Re: WCF - comparing the 'cloud' to a real app is, to me, a joke...but if you prefer it, go for it!... . Now that that's settled...I am sure you are correct. My original request was somehow cut off before it was finished, so you did not see the end of my original statement. In any event, I installed the client on the developer machine and now I have 2 problems; First, it still does not work. The application stops responding and second; although I took the precaution of running 2 different catch error clauses (see the code), both for Oracle and for general use, the app actually crashes Windows 7 if I do not shut it down immediately following failure. I suppose that I could put the entire 10gEX version on the developer machine and try connecting directly to a local version first just to test the application. I might try that next if I cannot think of another solution. I am new to Oracle, and frankly, I don't like it from an administrative point of view. But it is not my choice to make. If the vendor already has the database in place, it is simply for me to make the application work with it. Thank you again for your time and your reply...I do appreciate it. If you think of anything else, let me know...and have a nice day...Pat.
Re: 9i and 10g: a friend of mine that is a DBA for the military and an adjunct professor/instructor in databases at our college set this machine up for me to practice with. It was never intended to be an actual solution but rather a training aid. It also has MS SQL 2005 and MySql on it as well.>>Pat
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PDTUM wrote: DBA for the military and an adjunct professor/instructor
Ok so a military academic set up your server with all the most common databases available and you wonder why it won't talk to you. 
Seriously, I'm not surprised the poor thing won't cooperate. And yes Oracle is a PITA to manage, especially after coming from SQL Server, it does however chew through the data with gratifying speed.
Never underestimate the power of human stupidity
RAH
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PDTUM wrote: the app actually crashes Windows 7 if I do not shut it down immediately following failure
The OS actually crashes versus you receiving an OS exception?
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Hello js,
Thank you for your question....Yes. Since I made the earlier post, I have installed 10g on the local server and everything works perfectly. Although I have gotten great help from the people here, I still have the original issue in this case, so I just uploaded a post to another forum as I am still baffled by this. I will post the new text below. If you have any ideas...I am ALL ears... ...Thanks, Pat
I have a Windows 7 dev machine used to create .Net applications with VS 2010. I want to connect to a remote network server (using Windows 2003) that is running an Oracle 10g database. I also need to mention (just in case) that the remote server is also hosting an MS SQL 2005 application as well. I am using the code below (with the first connection string) to connect directly to a version of 10g that is running on the same machine with no problems, however when I try to connect to the network machine, it actually crashes Windows 7. I have tried several variations of connection strings as I feel that I must be making a sytax error somewhere. What concerns me is that I have dual try/catch statements in the application and I do not understand why it simply does not refuse the connection and report the error. I suppose the real question is 'what is the correct syntax for the connection string'....or WHATEVER the hell I am doing wrong. This is my first go around with Oracle (and I am not liking it at all), but it is not a matter of choice for me. SO.........any help or suggestions are greatly appreciated. Thank you in advance...Best Regards, Pat
string CONNSTR = "Server=192.168.2.5:1521;User ID=Patt;Password=Mine;";
public Oracle()
{
InitializeComponent();
}
private void TestMyOracleConnection()
{
OracleConnection Conn = new OracleConnection(CONNSTR);
try
{
Conn.Open();
MessageBox.Show("Oracle Connection Established", "Success");
}
catch (OracleException ex)
{
MessageBox.Show(ex.Message, "Oracle Connection Failed!");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Oracle Connection Failed!");
}
finally
{
Conn.Close();
MessageBox.Show("Oracle Connection Closed", "Success");
}
}
private void buttonTestConnection_Click(object sender, EventArgs e)
{
TestMyOracleConnection();
}
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An OS crash is a pretty severe problem and one which has nothing to do with your code.
It just simply shouldn't be possible.
Some possible avenues.
1. Try it on another machine. Perhaps you have some significant failure (like hardware) on your current box.
2. Try a different Oracle driver, if that is possible.
3. Insure the OS is up to date.
Solutions:
1. Is the target run machine going to be windows 7 (or server 2008)? If not then use a different OS for development.
2. Use a proxy server. I would suggest java. That is going to require a lot of work. But your app connects to the proxy app, it does the database work, and then returns the result.
The last is a rather severe solution but so is an OS crash.
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Guys,
In a few days I have a meeting internally about redesigning the Oracle database from scratch.
The downside is that none of the meeting participants is a real DBA (IMHO we should hire a DBA consultant for advice), but we do have some knowledge about Oracle.
one of my major concerns is that someone opted for multiple smaller databases (that should communicate if necessary) I can think of multiple reasons why this is a bad idea, but I couldn't find any satisfactory links to proove it. (Maybe it isn't that bad after all?)
I did write some stuff down already (never delete, but rather 'inactivate', use history mechanism etc..)
In short: What do I need to watch out for when designing a new database ?
If it can help, we're an insurance company, but we also do call taking (could result in some tables having rapid changes when a lot of calls come in) Also we will start with adding one project to it, then a second, a third etc... so no one time porting to another database.
Many thanks in advance.
V.
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V. wrote: IMHO we should hire a DBA consultant for advice
This is what you should do, getting a good one is always difficult and expensive. Having recently been dipped in Oracle for the first time in over a decade I can tell you the design and setup is VASTLY more difficult than sql server. The cost of getting a database design wrong enormously outweighs the initial expense of getting in a DBA.
For one, I'm told Oracle does not like multiple databases on a server, the design is to use schemas, I thought this was pure bullshit but it came from a DBA so it may be right.
For another Oracle is case sensitive when dealing with data so where name = 'Johny' will miss 'johny' IMHO this and the ongoing support requirement enough reason to use another database (sql server). The ONLY reason to use Oracle is if your data is so huge that SQL Server chokes. If your design spec says < 1tb per year I would use another database.
Never underestimate the power of human stupidity
RAH
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Mycroft Holmes wrote: For one, I'm told Oracle does not like multiple databases on a server, the design is to use schemas, I thought this was pure bullsh*t but it came from a DBA so it may be right.
It's BS. It works quite fine. It's just pointless. Multiple schemas is the way to go.
Mycroft Holmes wrote: For another Oracle is case sensitive when dealing with data so where name = 'Johny' will miss 'johny' IMHO this and the ongoing support requirement enough reason to use another database (sql server).
And the problem is what? Use a function based index and you got the best of both worlds.
Example:
CREATE INDEX foo_bar_ix
ON foo (
LOWER("bar")
)
/
And then you can search the table with Select * from Foo where lower(bar) = lower('Johnny');
"When did ignorance become a point of view" - Dilbert
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Jörgen Andersson wrote: Use a function based index and you got the best of both worlds
Nice. I didn't know you could do that. A 5 just for that trick.
Jörgen Andersson wrote: It's BS. It works quite fine. It's just pointless
I suspect he's referring to the load on having multiple instances running as opposed to a single instance running multiple schema.
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Pete O'Hanlon wrote: Nice. I didn't know you could do that. A 5 just for that trick.
That single trick alone is worth the extra trouble of using Oracle
"When did ignorance become a point of view" - Dilbert
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Materialised Views. They are worth it as well. Mind you, we have a top notch Oracle DBA to make sure that I don't have to know how to do this.
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Pete O'Hanlon wrote: Materialised Views. They are worth it as well
Agreed.
But sqlserver has indexed views.
Pete O'Hanlon wrote: Mind you, we have a top notch Oracle DBA to make sure that I don't have to know how to do this.
I guess that's the major problem with Oracle, that you need one.
"When did ignorance become a point of view" - Dilbert
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My biggest problem with materialised views is that we can't use any SDO geometry types in them (something that would be really useful for us).
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Are you sure about that?
I understand that it's severely limited[^]. But not impossible.
"When did ignorance become a point of view" - Dilbert
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It's point 9 that's the killer. We have some data that comes in as x,y coords and we want our materialised views to be spatial, so you get screwed up when you try to construct a location sdo geometry.
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Spatial is totally out of my line of work, but I would have thought point one or ten would have been the real killer.
I'm curious, what would have been the purpose of the mv if it had been possible?
"When did ignorance become a point of view" - Dilbert
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We are reliant on a separate supplier for a standardised gazetteer implementation in one particular project (the data's provided by the government), but we need it in a different format (a spatial one for spatial searches). We need the view to be updated on import of data into the master gazetteer. We've worked around the issue, but it would be nice not to have to work around the issue.
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I've been thinking about this one for a while.
If I understand you correctly (and it's quite possible I don't), you're getting XY coords from an external source that you load into a table, and you want them transformed into a sdo_geometry datatype which you do via a materialized view. And for some reason you can't do this at the import.
One possible solution is to add a virtual column into the master gazetteer that calculates the sdo_geometry.
From 11g you can index, gather statistics and partition by a virtual column, which makes them a lot faster and quite useful nowadays.
There are probably other limitations that makes it impossible to drop the view, but nothing I could find on a quick google.
"When did ignorance become a point of view" - Dilbert
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Pete O'Hanlon wrote: we have a top notch Oracle DBA to make sure that I don't have to know how to do this.
I wish. Difficult to find and expensive to retain. I'm in the throes of getting to know Oracle again after more than a decade in SS, I think SS must be like VB, lots of work to make it easy for the developer.
Then I aggregated 150m records in minutes where SS was taking hours and remembered why we are using Oracle.
Never underestimate the power of human stupidity
RAH
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I've balanced out the univote.
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Oh, hadn't noticed. Thanks!
"When did ignorance become a point of view" - Dilbert
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