Connecting to an ODBC DNS Data Source

Posted on 2007-12-02
Medium Priority
Last Modified: 2012-06-21
I am trying to connect to an Access mdb file using ODBC DNS, Can you please take alook at the code attched and see if you can see where im going wrong.

when i run the web app and press the button that calls the conection i get the following error on "conn.ConnectionString = strConnectionString;":
An OLE DB Provider was not specified in the ConnectionString.  An example would be, 'Provider=SQLOLED

All commects welcome.........................
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb; // added library
using Microsoft.Data.Odbc; //added libary
namespace WebApplication1
    public partial class _Default : System.Web.UI.Page
        protected void Page_Load(object sender, EventArgs e)
        protected void btnGo_Click(object sender, EventArgs e)
            // set the connection string
            //note: the @ symbol is needed before the string to prevent from having to use double back slashes
            string strConnectionString = "@DNS=PHJ;Uid=;Pwd=;";
                        // get the search contents
            string strSearchValue = txtSearch.Text;
            // create the sql query using the search value - note: access over oledb requires square brackets round table name
            string strSql = "SELECT OrderID, ServiceID FROM [Order2Service] WHERE ServiceID LIKE '%" + strSearchValue + "%';";
            // create a new connection object
            OleDbConnection conn = new OleDbConnection();
            // set the connection string from the global variable
            conn.ConnectionString = strConnectionString;
            // create a new command object using the connection
            OleDbCommand command = new OleDbCommand();
            command = conn.CreateCommand();
            command.CommandText = strSql; // set the sql query
            // create the dataset
            DataSet ds = new DataSet();
            // set and run the query - the adaptor executes the command against the database set in the command
            OleDbDataAdapter adapter = new OleDbDataAdapter();
            adapter = new OleDbDataAdapter(command);
            // bind and show the results in the grid
            grdResults.DataSource = ds.Tables[0];

Open in new window

Question by:martgriff
  • 3
LVL 19

Expert Comment

by:William Elliott
ID: 20392342
DSN not dns
LVL 19

Expert Comment

by:William Elliott
ID: 20392346
LVL 40

Expert Comment

ID: 20392351
Example connection strings can be found here: -

Author Comment

ID: 20394375
I have been on that website and if you look at my code i have put what they recommed but it is still failing, i have never connected to an DSN before so im not sure if there is somthing else missing?
LVL 19

Accepted Solution

William Elliott earned 2000 total points
ID: 20396252
string strConnectionString = "@DNS=PHJ;Uid=;Pwd=;";
should be
string strConnectionString = "@DSN=PHJ;Uid=;Pwd=;";

and it may help to have a userid and password
uid = userid
pwd = password

Featured Post

Get 10% Off Your First Squarespace Website

Ready to showcase your work, publish content or promote your business online? With Squarespace’s award-winning templates and 24/7 customer service, getting started is simple. Head to Squarespace.com and use offer code ‘EXPERTS’ to get 10% off your first purchase.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

One of the most important things in an application is the query performance. This article intends to give you good tips to improve the performance of your queries.
Exchange database can often fail to mount thereby halting the work of all users connected to it. Finding out why database isn’t mounting is crucial and getting the server back online. Stellar Phoenix Mailbox Exchange Recovery is a champion product t…
Despite its rising prevalence in the business world, "the cloud" is still misunderstood. Some companies still believe common misconceptions about lack of security in cloud solutions and many misuses of cloud storage options still occur every day. …
SQL Database Recovery Software repairs the MDF & NDF Files, corrupted due to hardware related issues or software related errors. Provides preview of recovered database objects and allows saving in either MSSQL, CSV, HTML or XLS format. Ensures recov…

627 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question