Changing connectionString at runtime in VB.NET 2005

VB.NET 2005 has connectionString value in the <configuration> file (.config) of the project.  I need to be able to change this at run time the app will run against many different SQL Servers.  

If I do this:
My.Settings.MyConnString = strMyString
it tells me it's a read only property.

How can I change it at run-time?

Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

If you want to write the connection string to the config file at runtime?

You can open the configuration file as Xml document and update the connection string by finding the element in the
xml doc. You can finally save the Xml document

for example:
           node = configDoc.SelectSingleNode("configuration")
            node1 = node.SelectSingleNode("appSettings")
            elem = CType(node1.SelectSingleNode(String.Format("add[@key='{0}']", "updated")), Xml.XmlElement)
            elem.SetAttribute("Connection", "The Full Connection String here")

            configDoc.Save(Reflection.Assembly.GetExecutingAssembly().Location + ".config")

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Visual Basic.NET

From novice to tech pro — start learning today.