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Editorial Team
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Asked: 2026-06-14T07:14:47+00:00

I have multiple forms in my project. Sometimes I work on my laptop, sometimes

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I have multiple forms in my project. Sometimes I work on my laptop, sometimes I work on my desktop. The problem is, when transferring my project from laptop to desktop and vice versa, I must change my connection string on all forms in the project.

This is my connection string. I declared it globally.

Dim CN As New SqlConnection("Data Source=.\SQLEXPRESS;AttachDbFilename=D:\Documents and Settings\Adriane05\Desktop\ThesisDB.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True")

How can I change a single file without changing it on all forms?

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1 Answer

  1. Editorial Team

    There are a few ways you could accomplish this. First is you could map your project folder to the same drive letter on all your computers so your connection string wouldn’t change. I do this by default because my projects are on a drive that I encrypt with TrueCrypt

    Another way is a simple code pattern. Store your connection string in a setting or global variable, and run something like this when your application loads:

    if Environment.MachineName.Equals("laptop") then
    connectionString = ' Connection string 1
ElseIf Environment.MachineName.Equals("desktop") then
    connectionString = ' Connection string 2 
else
    connectionString = My.Settings.ConnectionString
End If

databaseProvider.Open(connectionString)
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