[RESOLVED] Error in Connecting C#.Net with ORACLE

*My tnsNames.Ora File -*

Code:

---

XE =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = Sonia-PC)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XE)
    )
  )

EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    )
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
    )
  )

ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    )
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
    )
  )

---

*.Net Code -*

Code:

---

public partial class Default2 : System.Web.UI.Page
{
   
    OracleCommand cmd = new OracleCommand();
    OracleConnection conn = new OracleConnection("Data Source=(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = Sonia-PC)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = XE))),UserID=user_test,Password=sonia;");
   
    protected void Page_Load(object sender, EventArgs e)
    {
        cmd.CommandText = "INSERTSTUDENT";
        cmd.Connection = conn;
        cmd.Parameters.Add("p_roll", OracleDbType.Long, 64, 1, ParameterDirection.Input);
        cmd.Parameters.Add("p_name", OracleDbType.Varchar2, 2000, "sonia", ParameterDirection.Input);
        cmd.Parameters.Add("p_marks", OracleDbType.Long, 64, "10", ParameterDirection.Input);
        conn.Open();
        cmd.ExecuteNonQuery();
    }
}

---

When the line conn.Open() is executed ERROR is dere - *ORA-12154: TNS:could not resolve the connect identifier specified*
I have set Data Source = XE also but it also giving the same ERROR.

This is an issue with the way that Oracle is set up. Here's a link for troubleshooting it: http://ora-12154.ora-code.com/

1 think I would check would be the path to your solution. I had an issue where I was working on a project where there was a parenthesis in the folder name. (ex. C:\Users\MattP\Foo\Bar (2)) Removing the parenthesis fixed the problem in that case.

Edit: This article seems to be much more thorough in troubleshooting steps http://edstevensdba.wordpress.com/20...2154tns-03505/

Hi Mattp.There is no with the Oracle Set up,Because my sql developer and SQL plus too is connected with the oracle without any Error. This error is only while connecting .net + oracle.When I am tried to open connection.

This question has nothing whatsoever to do with VB.NET, so I'm going to ask the mods to move it to a more appropriate forum.

Quote:

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Originally Posted by jmcilhinney

This question has nothing whatsoever to do with VB.NET

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And I don't think it is related to C# code writing so I'm moving it to Database Development.

In your connection string, you have a "," (comma) after the user name value. Try replacing that with a ";"(semi-colon).

Your string should now look like this.

PHP Code:

---

Data Source=(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = Sonia-PC)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = XE))),UserID=user_test;Password=sonia;" 


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Hello abhijit, its done. Replacing the semi-colon with comma worked. BUt there is one change in your answer , we have to replace comma after the Data Source Also : -

Code:

---

OracleConnection conn = new OracleConnection("Data Source=XE;User Id=user_test;Password=sonia;");

---

OR

Code:

---

OracleConnection conn = new OracleConnection("Data Source=(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = Sonia-PC)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = XE)));User Id=user_test;Password=sonia;");

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