Application Error: Oracle 9i

Question

Hi Guys,
Pls Assist, this error I get when the application is accessed.
Server Error in '/WFSearchDetails' Application.
ORA-12154: TNS:could not resolve the connect identifier specified
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.OleDb.OleDbException: ORA-12154: TNS:could not resolve the connect identifier specified
Source Error:
Line 25:                     string sConnString = "Provider=OraOLEDB.Oracle;Data Source=" + OracleDataSource + ";User ID=" + userid + ";Password=" + password + ";OLEDB.NET=true" + ";PLSQLRSet=true";
Line 26:                     oOleDbConnection = new OleDbConnection(sConnString);
Line 27:                     oOleDbConnection.Open();
Line 28:                return oOleDbConnection;
Line 29:           }
Source File: c:\Inetpub\wwwroot\WFSearchDetails\App_Code\Connections.cs Line: 27
Stack Trace:
[OleDbException (0x80004005): ORA-12154: TNS:could not resolve the connect identifier specified]
System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection) +1054721
System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject) +53
System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup) +27
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +47
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +105
System.Data.OleDb.OleDbConnection.Open() +37
Connections.Oracle.Connect() in c:\Inetpub\wwwroot\WFSearchDetails\App_Code\Connections.cs:27
WFSearchDetails.WebForm1.BuildWFDetail(String wfid) in c:\Inetpub\wwwroot\WFSearchDetails\WFSD.aspx.cs:42
WFSearchDetails.WebForm1.Entry() in c:\Inetpub\wwwroot\WFSearchDetails\WFSD.aspx.cs:35
ASP.wfsd_aspx.__RenderForm1(HtmlTextWriter __w, Control parameterContainer) in c:\Inetpub\wwwroot\WFSearchDetails\WFSD.aspx:62
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +2065835
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +24
System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +59
System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +68
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +37
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +130
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +24
System.Web.UI.Page.Render(HtmlTextWriter writer) +26
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1896
Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42
Thanx.

Answer 1

It seems that the database alias that you are giving is not correct. Please check the database alias in the code and match it with the Tnsnames.ora file.
regards