What do I have to write in OracleConnection string for "Data Source" ?

[Werner Sammer]

I tried to connect to an existing Oracle Database with the following ConnectionString:

using System.Data.OracleClient; // + Added Reference "System.Data.OracleClient"

string cs = "Data Source=XE;User Id=karl;Password=mypasswd";
connection = new OracleConnection(cs);
connection.Open();

This code yields an "Invalid argument" ORA-12532 error.

Why ?

Even when I switch to

using Oracle.DataAccess.Client; // + Added Reference "Oracle.DataAccess"

I got the same error.

"XE" is the name of the Oracle Express Database.

What else can I do ?
Does the sequence of Data Source, User Id and Password in the connection string matter ?

Do I have to declare the "Data Source" somewhere else (beside the Reference)?

Werner

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,

Check http://www.connectionstrings.com/

"Werner Sammer" <we****@yahoo.dewrote in message
news:46***********************@newsspool3.arcor-online.net...

>I tried to connect to an existing Oracle Database with the following
ConnectionString:

using System.Data.OracleClient; // + Added Reference
"System.Data.OracleClient"

string cs = "Data Source=XE;User Id=karl;Password=mypasswd";
connection = new OracleConnection(cs);
connection.Open();

This code yields an "Invalid argument" ORA-12532 error.

Why ?

Even when I switch to

using Oracle.DataAccess.Client; // + Added Reference "Oracle.DataAccess"

I got the same error.

"XE" is the name of the Oracle Express Database.

What else can I do ?
Does the sequence of Data Source, User Id and Password in the connection
string matter ?

Do I have to declare the "Data Source" somewhere else (beside the
Reference)?

Werner

[James Irvine]

Werner Sammer wrote:

I tried to connect to an existing Oracle Database with the following ConnectionString:

using System.Data.OracleClient; // + Added Reference "System.Data.OracleClient"

string cs = "Data Source=XE;User Id=karl;Password=mypasswd";
connection = new OracleConnection(cs);
connection.Open();

This code yields an "Invalid argument" ORA-12532 error.

Why ?

Even when I switch to

using Oracle.DataAccess.Client; // + Added Reference "Oracle.DataAccess"

I got the same error.

"XE" is the name of the Oracle Express Database.

What else can I do ?
Does the sequence of Data Source, User Id and Password in the connection string matter ?

Do I have to declare the "Data Source" somewhere else (beside the Reference)?

Werner

1. in web.config:

<connectionStrings>
<add name="jamieOracle" connectionString="user
id=jamie;password=jamie;data
source=(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=j amieamd)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=ja mie)))"/>
</connectionStrings>

2. in your app:

// create an Oracle data provider connection:
string connStr =
ConfigurationManager.ConnectionStrings["jamieOracle"].ConnectionString;
OracleConnection con = new OracleConnection(connStr);