Question

I have a program that generates reports by using DataTables created by TableAdapters. Now my client has a new database, and he wants to be able to switch between the new one and the old one. I found that I can do it by changing the connection string in the app.config, but I don’t know how to do it during run time. Can you suggest me a way?
Thanks

Answer 1

I don’t know how to do it during run time

Don’t. You can have multiple connection strings in the app.config and access each when needed.

Configuration:

<connectionStrings>
  <add name="conn1" providerName="System.Data.SqlClient"
       connectionString="..." />
  <add name="conn2" providerName="System.Data.SqlClient"
       connectionString="..." />
</connectionStrings>

In code:

var conn1 = ConfigurationManager.ConnectionStrings["conn1"];
var conn2 = ConfigurationManager.ConnectionStrings["conn2"];