Connection tester : SqlConnectionStringBuilder « ADO.net Database « ASP.NET Tutorial

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ASP.NET Tutorial » ADO.net Database » SqlConnectionStringBuilder 
18. 4. 5. Connection tester
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="TestConnection" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
   <title>Testing the Connection</title>
</head>
<body>
   <form id="form1" runat="server">
      <div id="container">
         <h1>Testing the Connection</h1>
         
         This example tests the <code>Connection</code> class.
         
         
         <asp:Label ID="labMsg" runat="server" />
         
      </div>
   </form>
</body>
</html>
File: Default.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.Data.OleDb;
using System.Data.SqlClient;
using System.Web.Configuration;

public partial class TestConnection : System.Web.UI.Page
{
   protected void Page_Load(object sender, EventArgs e)
   {
      SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder();
      builder.DataSource = "localhost";
      builder.InitialCatalog = "Northwind";
      builder.IntegratedSecurity = true;

      string connString = builder.ConnectionString;

      SqlConnection conn = null;
      try
      {
         conn = new SqlConnection(connString);
         conn.Open();

         labMsg.Text = "State of Connection: " + conn.State;
      }
      catch (Exception ex)
      {
         labMsg.Text = "Error occurred accessing the database";
         labMsg.Text += "<br/>" + ex.Message;
      }
      finally
      {
         if (conn != null)
            conn.Close();
      }
   }
}
18. 4. SqlConnectionStringBuilder
18. 4. 1. Construct a SqlConnectionStringBuilder from user input
18. 4. 2. Automatically converts any connection string into its canonical representation
18. 4. 3. Building connection strings using ConnectionStringBuilder (C#)
18. 4. 4. Building connection strings using ConnectionStringBuilder (VB)
18. 4. 5. Connection tester
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