Encrypt and Decrypt connectionString section in Web.config

Here is the source code to encrypt and decrypt <connectionString> section in Web.config using RSA Protected Configuration provider model.

Note that below source code is from class library file. It is quite feasible to edit the code and use within a button click event as you wish.

Hope you find it useful!!

using System; 
using System.Collections.Generic; 
using System.Text; 
using System.Web; 
//specific to configuration 
using System.Configuration; 
using System.Web.Configuration; 
using System.Web.Security; 
namespace WebUtils 
{ 
/// <summary> 
/// Contains methods for Encrypting and decrypting connectionStrings

/// section in web.config 
/// current encryption configuration model is Rsa,

/// it is feasible to change this to DataProtectionConfigurationProvider 
/// </summary> 
/// <author>Raju Golla</author> 
public class EncryptDecrypt 
{ 
//Get Application path using HttpContext 
public static string path = HttpContext.Current.

Request.ApplicationPath; 
/// <summary> 
/// Encrypt web.config connectionStrings
/// section using Rsa protected configuration
/// provider model 
/// </summary> 
#region Encrypt method 
public static void EncryptConnString() 
{ 
Configuration config = WebConfigurationManager.

OpenWebConfiguration(path); 
ConfigurationSection section = 

config.GetSection("connectionStrings"); 
if (!section.SectionInformation.IsProtected) 
{ 
section.SectionInformation.ProtectSection

("RsaProtectedConfigurationProvider"); 
config.Save(); 
} 
} 
#endregion 
/// <summary> 
/// Decrypts connectionStrings section in 
///web.config using Rsa provider model 
/// </summary> 
#region Decrypt method 
public static void DecryptConnString() 
{ 
Configuration config = WebConfigurationManager.

OpenWebConfiguration(path); 
ConfigurationSection section = 

config.GetSection("connectionStrings"); 
if (section.SectionInformation.IsProtected) 
{ 
section.SectionInformation.UnprotectSection(); 
config.Save(); 
} 
} 
#endregion 
} 
} 

References:

http://www.beansoftware.com/ASP.NET-Tutorials/Encrypting-Connection-String.aspx

http://msdn.microsoft.com/en-us/library/ms998280.aspx