1. How to implement a
custom IPrincipal in
ASP.NET MVC
Nat
20140224

2. Why ?

We want more user information in Principal object

Ex.

User.MemberID

User.LoginID

3. IPrincipal and IIdentity

System.Security.Principal.IPrincipal



Page.User
Controller.User
System.Security.Principal.IIdentity

User.Identity

4. How

Define a class which implements IPrinicpal interface



Save custom settings to Cookie
Restore custom settings on every request
Replace User object on PostAuthenticateRequest event

5. Implementation

public class CustomPrincipalSerializeModel

public class CustomPrincipal : IPrincipal

Signin – save custom settings


Login action
Request – restore custom settings

Global.asax - Application_PostAuthenticateRequest

6. Implementation

Replace (User as CustomPrincipal).LoginID with User.LoginID

public class CustomController : Controller

7. Implementation

Replace @(User as CustomPrincipal).MemberID With @(User.MemberID)

public abstract class CustomWebViewPage : WebViewPage

public abstract class CustomWebViewPage<TModel> : WebViewPage<TModel>

Views/Web.config

<pages pageBaseType="CustomWebViewPage">

8. Reference

http://www.codeproject.com/Tips/574576/How-to-implement-a-customIPrincipal-in-ASP-NET-MV

http://stackoverflow.com/questions/1064271/asp-net-mvc-set-customiidentity-or-iprincipal