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Using DataLinks to get or edit a connection string

, 9 Mar 2004 98.2K 1.3K 40
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Accessing DataLinks from a .NET program to get or edit a connection string.

Sample Image - DataLinks.gif

Introduction

A similar article was written on this subject but this article deals with accessing DataLinks from a .NET program to get or edit a connection string. Your project must reference DataLinks and ADODB, then execute the PromptNew or PromptEdit methods.

Step by step procedure

  1. Reference ADODB in your project. This is required to read the COM object passed back from DataLinks. This file is located here: c:\Program Files\Microsoft.NET\Primary Interop Assemblies\adodb.dll
  2. Reference DataLinks in your project. DataLinks used to be MSDASC.dll, but has changed to OLEDB32.DLL (see KB). This file is located here: C:\Program Files\Common Files\System\Ole DB\OLEDB32.DLL
  3. Create a text box and a button on a Windows Form. In the button's click event, use this code:
private void ButtonGetConnectionString_Click(object sender, 
  System.EventArgs e)
{
   /* 
        Reference DataLinks
        NOTE: Reference 
              C:\Program Files\Common Files\System\Ole DB\OLEDB32.DLL
              (Was MSDASC.dll) 
        SEE:
           http://support.microsoft.com:80/support/kb/articles/Q225/1/32.asp
   */
      MSDASC.DataLinks dataLinks = new MSDASC.DataLinksClass();
      //note that a reference to: 
      //  c:\Program Files\Microsoft.NET\Primary Interop Assemblies\adodb.dll
      //is also required to read the ADODB._Connection result
      ADODB._Connection connection;                         
      //are we editing an existing connect string or getting a new one?
      if(this.txtConnectionString.Text==String.Empty)
      {     
            // get a new connection string
            try   
            {           
               //Prompt user for new connect string
               connection = (ADODB._Connection)dataLinks.PromptNew();
               //read result
               this.txtConnectionString.Text=
                    connection.ConnectionString.ToString();
            }
            catch(Exception ex)     
            {
                  MessageBox.Show(ex.ToString());     
            }
      }
      else
      {     
            // edit connection string
            connection=new ADODB.ConnectionClass();
            connection.ConnectionString=this.txtConnectionString.Text;
            //set local COM compatible data type
            object oConnection=connection;
            try   
            {     
                  //prompt user to edit the given connect string
                  if((bool)dataLinks.PromptEdit(ref oConnection))
                  {
                        this.txtConnectionString.Text=
                             connection.ConnectionString;
                  }
            }
            catch(Exception ex)
            {
                  MessageBox.Show(ex.ToString());     
            }
      }
}

License

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About the Author

DanMayer
Web Developer
United States United States
No Biography provided

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Comments and Discussions

 
Question64 / 32 bit drivers? Pin
richardbrigzy21-Sep-12 15:02
memberrichardbrigzy21-Sep-12 15:02 
AnswerRe: 64 / 32 bit drivers? Pin
jonpetitta18-Aug-14 9:08
memberjonpetitta18-Aug-14 9:08 
GeneralProblem with the waitcursor Pin
PrimozPayton25-Aug-08 2:44
memberPrimozPayton25-Aug-08 2:44 
GeneralSqlClient Issue with Provider Property Pin
Brady Kelly28-Jul-07 23:07
memberBrady Kelly28-Jul-07 23:07 
GeneralNo need for interop Pin
Sergey Prokhorenko24-Jun-07 23:38
memberSergey Prokhorenko24-Jun-07 23:38 
GeneralRe: No need for interop Pin
Sergey Prokhorenko24-Jun-07 23:42
memberSergey Prokhorenko24-Jun-07 23:42 
GeneralRe: No need for interop Pin
Brady Kelly28-Jul-07 22:58
memberBrady Kelly28-Jul-07 22:58 
GeneralRe: No need for interop Pin
Member 871442120-Nov-13 4:10
memberMember 871442120-Nov-13 4:10 
GeneralSpeed Pin
akorolev103-Oct-04 0:24
memberakorolev103-Oct-04 0:24 
GeneralGreat! Give me exact what I am looking for Pin
zhoulhh1-Jul-04 7:39
memberzhoulhh1-Jul-04 7:39 
GeneralPromptEdit(ref connectionString) Pin
UnderEducated10-Mar-04 10:33
memberUnderEducated10-Mar-04 10:33 
GeneralRe: PromptEdit(ref connectionString) Pin
DanMayer10-Mar-04 10:55
memberDanMayer10-Mar-04 10:55 
GeneralRe: PromptEdit(ref connectionString) Pin
UnderEducated10-Mar-04 12:03
memberUnderEducated10-Mar-04 12:03 
GeneralRe: PromptEdit(ref connectionString) [modified] Pin
mlgray3-Jul-06 23:06
membermlgray3-Jul-06 23:06 
GeneralRe: PromptEdit(ref connectionString) Pin
yetty200026-Oct-07 6:10
memberyetty200026-Oct-07 6:10 
GeneralRe: Very Slow... Pin
VHsu13-Feb-04 19:41
memberVHsu13-Feb-04 19:41 
GeneralRe: Very Slow... Pin
DanMayer14-Feb-04 6:45
memberDanMayer14-Feb-04 6:45 
GeneralRe: Very Slow... Pin
mgarins19-Feb-04 4:20
sussmgarins19-Feb-04 4:20 
I am sure he probably did not even try the code Wink | ;) ... he just saw the COM interop and immediately thought slow which is not always true.... This tip is a great way to provide an easy to develop way to create an UI for generating connection strings.

I have not profiled what goes on in VS.NET when in server explorer under Data Connections what code is being run when one chooses New Data Connection.. My guess is code similar to this.Smile | :)

Marty
GeneralRe: Very Slow... Pin
Ricardo Casquete17-Feb-06 23:55
memberRicardo Casquete17-Feb-06 23:55 

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