ASP.Net Code Using C# - Connection String , SQL Connection String

Connection String in aspx_page

ConnectionString="<%$ ConnectionStrings:ConnectionString %>"    (from web.config file)

Connection String in aspx.cs_page

SqlConnection cnn = new SqlConnection();

cnn.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;

Connection String in Web.config_page

<configuration>

      <appSettings/>

      <connectionStrings>

    <add name="ConnectionString" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True;User Instance=True"

   providerName="System.Data.SqlClient" />

 </connectionStrings>

Or

<connectionStrings>

  <add name="ConnectionString" connectionString="Server=omgoelmdfromusa.db.2263994.hostedresource.com; Database=omgoelmdfromusa;User ID=omgoelmdfromusa;Password=Bondo@321; Trusted_Connection=False"

   providerName="System.Data.SqlClient" />

 </connectionStrings>