Detecting Web.Config Authentication Mode

Question

Say I have the following web.config:

Answer 1

Try Context.User.Identity.AuthenticationType

Go for PB's answer folks

Answer 2

use an xpath query //configuration/system.web/authentication[mode] ?

protected void Page_Load(object sender, EventArgs e)
{
 XmlDocument config = new XmlDocument();
 config.Load(AppDomain.CurrentDomain.SetupInformation.ConfigurationFile);
 XmlNode node = config.SelectSingleNode("//configuration/system.web/authentication");
 this.Label1.Text = node.Attributes["mode"].Value;
}

Answer 3

Import the System.Web.Configuration namespace and do something like:

var configuration = WebConfigurationManager.OpenWebConfiguration("/");
var authenticationSection = (AuthenticationSection)configuration.GetSection("system.web/authentication");
if (authenticationSection.Mode == AuthenticationMode.Forms)
{
  //do something
}

Answer 4

You can also get the authentication mode by using the static ConfigurationManager class to get the section and then the enum AuthenticationMode.

AuthenticationMode authMode = ((AuthenticationSection) ConfigurationManager.GetSection("system.web/authentication")).Mode;

The difference between WebConfigurationManager and ConfigurationManager

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If you want to retrieve the name of the constant in the specified enumeration you can do this by using the Enum.GetName(Type, Object) method

Enum.GetName(typeof(AuthenticationMode), authMode); // e.g. "Windows"

Answer 5

The mode property from the authenticationsection: AuthenticationSection.Mode Property (System.Web.Configuration). And you can even modify it.

// Get the current Mode property.
AuthenticationMode currentMode = 
    authenticationSection.Mode;

// Set the Mode property to Windows.
authenticationSection.Mode = 
    AuthenticationMode.Windows;

This article describes how to get a reference to the AuthenticationSection.