ASP.NE Hosting - ASPHostPortal.com :: Easy Ways to dynamically update web config file in asp.net?

I want to configure my web config connection string in my aspx page. That mean I want to change my web.config file dynamically. User can change the connection string any time without touching the server. For that the below asp.net c# code will help you to change connection string , appsetting information and ect..  in dynamically.

private void SetConfigSettings()
        {
            try
            {
                // App setting settings
                System.Configuration.Configuration config = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("~");

                //APPsetting value change
                System.Configuration.KeyValueConfigurationElement setting = config.AppSettings.Settings["SupportFormat"];
                if (null != setting)
                    config.AppSettings.Settings["SupportFormat"].Value = txtFormat.Text.Trim();

                //APPsetting value change
                System.Configuration.KeyValueConfigurationElement Pathsetting = config.AppSettings.Settings["Path"];
                if (null != Pathsetting)
                    config.AppSettings.Settings["Path"].Value = txtPath.Text.Trim();


                //Connection string changes
                string newConnectionString = "Data Source=" + txtServer.Text + ";Initial Catalog='" + txtDatabaseName.Text.Replace("'", "") + "';User ID=" + txtUserName.Text + ";Password=" + txtPassword.Text + ";Persist Security Info=True;";

                //Configuration openWebConfiguration = WebConfigurationManager.OpenWebConfiguration("~");
                ConnectionStringsSection sections = config.GetSection("connectionStrings") as ConnectionStringsSection;
                if (sections != null)
                {
                    sections.ConnectionStrings["ConString"].ConnectionString = newConnectionString;
                    ConfigurationManager.RefreshSection("ConString");

                }
                config.Save();

                lblMSG.Text = "Updated successfully!!!";
                lblMSG.ForeColor = Color.Green;
            }
            catch (System.Exception exc)
            {
                lblMSG.Text = exc.Message;
                lblMSG.ForeColor = Color.Red;
            }
        }

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