The Connection String Reference

Hello:

I am try to get connection string from web config, but I got error" a field initializer can not reference the nonstatic field, method, or property '_default.connStr'. I search a lot. It says that I need constructor, but I am not sure how to write the constructor at class: public partial class _Default : System.Web.UI.Page

Here is my code:

{public partial class _Default : System.Web.UI.Page

    string txt;
    string username;
    OleDbCommand myCommand = null;
    OleDbDataReader myDataReader = null;
 

//retrieve the connection string from the ConnectionString Key in Web.Config
    string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;

    //create a new OleDB connection
    OleDbConnection myConnection = new OleDbConnection(connStr);

protected void Page_Load(object sender, EventArgs e)
    {

            string strOledb = @"select * from tableone";
     
            OleDbCommand myCommand = new OleDbCommand(strOledb);

when publishing  in the webmatrix dialogue it asks for "destination connection string" for my "database.mdf"

I was not sure what it was so I pasted this from my web.config file :

Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\database.mdf;Integrated Security=True;User Instance=True

Hey,

Im trying to create a Web Deployment Project, the built in setup and deployment is very good in Visual Studio, i need to able to add an additional step in the setup to change the connection string in the Web config file. Ive seen a lot of articles on how to do this and in particular this http://weblogs.asp.net/scottgu/archive/2007/06/15/tip-trick-creating-packaged-asp-net-setup-programs-with-vs-2005.aspx#7162670 I am however stuck on the final part of this tutorial, im using the code Scott provided but have two errors,  heres part of my code where the errors are

using System;
using System.Configuration;
using System.Configuration.Install;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using System.DirectoryServices;

 void ConfigureDatabase(string targetSite, string targetVDir, string connectionString)
        {
            // Retrieve "Friendly Site Name" from IIS for TargetSite
            DirectoryEntry entry = new DirectoryEntry("IIS://LocalHost/" + targetSit