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How To Retrieving a List of All ODBC Data Sources

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This article was previously published under Q119064

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The Open Database Connectivity (ODBC) API contains a function called SQLDataSources() which can be used to retrieve information about data sources which are available to an application. Below is a sample function which fills a CStringList with the names of all available ODBC data sources.

Sample Code

   #include <afxcoll.h>    //Needed for CStringList MFC class.
   #include "odbcinst.h"
   #include "sql.h"
   #include "sqlext.h"

   // NOTE: in 16-bit Visual C++ link with odbcinst.lib
   //       in 32-bit Visual C++ 2.x link with odbccp32.lib
   //       in 32-bit Visual C++ 4.x no need to change link options

   #define MAX_DSN_LENGTH 30
   #define MAX_DSN_DESC_LENGTH 300

   BOOL GetODBCDataSourceNames(CStringList * pList)
       HENV hEnv;
       char szDSN[MAX_DSN_LENGTH];
       SWORD cbDSN;
       UCHAR szDescription[MAX_DSN_DESC_LENGTH];
       SWORD cbDescription;
       RETCODE retcode;

       if (SQLAllocEnv(&hEnv)!=SQL_SUCCESS)
           return FALSE;

       while (retcode=SQLDataSources(hEnv, SQL_FETCH_NEXT,
                    (UCHAR FAR *) &szDSN, MAX_DSN_LENGTH, &cbDSN,
                    (UCHAR FAR *) &szDescription,MAX_DSN_DESC_LENGTH,
                     &cbDescription) != SQL_NO_DATA_FOUND


       if (retcode==SQL_ERROR)
         return FALSE;

       return TRUE;

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Keywords: kbprogramming, kbcode, kbdatabase, kbhowto, KB119064

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Article Info
Article ID : 119064
Revision : 5
Created on : 11/21/2006
Published on : 11/21/2006
Exists online : False
Views : 455