dcsimg

Create Access data source name dynamically

WEBINAR:
On-Demand

Desktop-as-a-Service Designed for Any Cloud ? Nutanix Frame


This sample in this article was created using VC 5.0. The necessary .h and .lib files are present in the zip.

To create a DSN at run time you could use the SQLConfigDataSource API. Internally this information is stored in the registry. The syntax is attached below

SQLConfigDataSource(NULL,ODBC_ADD_DSN,"Microsoft Access Driver (*.mdb)\0","DSN=TestDB\0DBQ=D:\\Database\\Friends.mdb\0DEFAULTDIR=D:\\DATABASE\0\0");

The problem is that if you want to accept the values from the user or set these values at run time by passing CString or char* will not work. This is because, when sprintf encounters a /0 it assumes it is the end of the string and ignores the rest of the data.

As a workaround you have to use the below mentioned code.

The following code places : where a /0 is expected and there is a loop which replaces a ":" with "/0". You will not be in a position to use sprintf because, when it encounters a /0 it assumes it is the end of the string and ignores the rest of the data.

char* szDesc;

int mlen;

szDesc=new char[256];

sprintf(szDesc,"DSN=%s: DESCRIPTION=TOC support source: DBQ=%s: FIL=MicrosoftAccess: DEFAULTDIR=D:\\Database:: ","TestDB","D:\\Friends.mdb");

mlen = strlen(szDesc);

for (int i=0; i<mlen; i++)

{

if (szDesc[i] == ':')

szDesc[i] = '\0';

}

if (FALSE == SQLConfigDataSource(NULL,ODBC_ADD_DSN,"Microsoft Access Driver (*.mdb)\0",(LPCSTR)szDesc))

MessageBox(hwnd,"Failed","INFORMATION",MB_OK);

else

MessageBox(hwnd,"Sucess","INFORMATION",MB_OK);

Download ZIP - 48KB



Comments

  • There are no comments yet. Be the first to comment!

  • You must have javascript enabled in order to post comments.

Leave a Comment
  • Your email address will not be published. All fields are required.

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date