Change Connection String After Creating Setup File in C#.NET

Question

I am creating a C# windows form applications, the working can be summarized as users fills some form and data is saved in Access database. Now the problem I am facing is tha

Answer 1

You can build ConnectionString at run-time by SqlConnectionStringBuilder

// Create a new SqlConnectionStringBuilder and
    // initialize it with a few name/value pairs.
    SqlConnectionStringBuilder builder =
        new SqlConnectionStringBuilder(GetConnectionString());

    // The input connection string used the 
    // Server key, but the new connection string uses
    // the well-known Data Source key instead.
    Console.WriteLine(builder.ConnectionString);

    // Pass the SqlConnectionStringBuilder an existing 
    // connection string, and you can retrieve and
    // modify any of the elements.
    builder.ConnectionString = "server=(local);user id=ab;" +
        "password= a!Pass113;initial catalog=AdventureWorks";

    // Now that the connection string has been parsed,
    // you can work with individual items.
    Console.WriteLine(builder.Password);
    builder.Password = "new@1Password";
    builder.AsynchronousProcessing = true;

    // You can refer to connection keys using strings, 
    // as well. When you use this technique (the default
    // Item property in Visual Basic, or the indexer in C#),
    // you can specify any synonym for the connection string key
    // name.
    builder["Server"] = ".";
    builder["Connect Timeout"] = 1000;
    builder["Trusted_Connection"] = true;
    Console.WriteLine(builder.ConnectionString);

    Console.WriteLine("Press Enter to finish.");
    Console.ReadLine();

Edit: you can use this : Finding SQL Servers on the Network