How To: Build Claims-Aware ASP.NET Application Using Forms-Based Authentication

Artigo
03/30/2017

Applies To

Microsoft® Windows® Identity Foundation (WIF)
ASP.NET® Web Forms

Summary

This How-To provides detailed step-by-step procedures for creating a simple claims-aware ASP.NET Web Forms application that uses Forms authentication. It also provides instructions for how to test the application to verify that claims are presented when a user signs in with Forms authentication.

Objectives
Overview
Summary of Steps
Step 1 – Create a Simple ASP.NET Web Forms Application
Step 2 – Configure ASP.NET Web Forms Application for Claims Using Forms Authentication
Step 3 – Test Your Solution

Objectives

Configure an ASP.NET Web Forms application for claims using Forms authentication
Test the ASP.NET Web Forms application to see if it is working properly

Overview

In .NET 4.5, WIF and its claims-based authorization have been included as an integral part of the Framework. Previously, if you wanted claims from an ASP.NET user, you were required to install WIF, and then cast interfaces to Principal objects such as Thread.CurrentPrincipal or HttpContext.Current.User. Now, claims are served automatically by these Principal objects.

Forms authentication has benefited from WIF’s inclusion in .NET 4.5 because all users authenticated by Forms automatically have claims associated with them. You can begin using these claims immediately in an ASP.NET application that uses Forms authentication, as this How-To demonstrates.

Summary of Steps

Step 1 – Create a Simple ASP.NET Web Forms Application
Step 2 – Configure ASP.NET Web Forms Application for Claims Using Forms Authentication
Step 3 – Test Your Solution

Step 1 – Create a Simple ASP.NET Web Forms Application

In this step, you will create a new ASP.NET Web Forms application.

To create a simple ASP.NET application

Start Visual Studio and click File, New, and then Project.
In the New Project window, click ASP.NET Web Forms Application.
In Name, enter TestApp and press OK.

Step 2 – Configure ASP.NET Web Forms Application for Claims Using Forms Authentication

In this step you will add a configuration entry to the Web.config configuration file and edit the Default.aspx file to display claims information for an account.

To configure ASP.NET application for claims using Forms authentication

In the Default.aspx file, replace the existing markup with the following:

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="TestApp._Default" %>

<asp:Content runat="server" ID="BodyContent" ContentPlaceHolderID="MainContent">
    <p>
        This page displays the claims associated with a Forms authenticated user.
    </p>
    <h3>Your Claims</h3>
    <p>
        <asp:GridView ID="ClaimsGridView" runat="server" CellPadding="3">
            <AlternatingRowStyle BackColor="White" />
            <HeaderStyle BackColor="#7AC0DA" ForeColor="White" />
        </asp:GridView>
    </p>
</asp:Content>

This step adds a GridView control to your Default.aspx page that will be populated with the claims retrieved from Forms authentication.

Save the Default.aspx file, then open its code-behind file named Default.aspx.cs. Replace the existing code with the following:

using System;
using System.Web.UI;
using System.Security.Claims;

namespace TestApp
{
    public partial class _Default : Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            ClaimsPrincipal claimsPrincipal = Page.User as ClaimsPrincipal;

            if (claimsPrincipal != null)
            {
                this.ClaimsGridView.DataSource = claimsPrincipal.Claims;
                this.ClaimsGridView.DataBind();
            }
        }
    }
}

The above code will display claims about an authenticated user, including users identified by Forms authentication.

Step 3 – Test Your Solution

In this step you will test your ASP.NET Web Forms application, and verify that claims are presented when a user signs in with Forms authentication.

To test your ASP.NET Web Forms application for claims using Forms authentication

Press F5 to build and run the application. You should be presented with Default.aspx, which has Register and Log in links in the top right of the page. Click Register.
On the Register page, create a user account, and then click Register. Your account will be created using Forms authentication, and you will be automatically signed in.
After you have been redirected to the home page, you should see a table beneath the Your Claims heading that includes the Issuer, OriginalIssuer, Type, Value, and ValueType claims information about your account.

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