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I using asp.net identity. I create the default asp.net mvc application that implement user identity. The application use HttpContext.User.Identity to retrieve user id and user name :
string ID = HttpContext.User.Identity.GetUserId();
string Name = HttpContext.User.Identity.Name;
I am able to customize AspNetUsers table. I add some properties to this table but want to be able to retrieve these properties from HttpContext.User. Is that possible ? If it is possible, how can I do it ?
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By default, the ASP.NET Identity system stores all the user information in a database. ASP.NET Identity uses Entity Framework Code First to implement all of its persistence mechanism. Since you control the database schema, common tasks such as changing table names or changing the data type of primary keys is simple to do.
When we can use HttpContext.Current.Items to stores data in ASP.NET ? To answer this question In a single statement, you can use HttpContext.Current.Items for very short term storage. By Short term storage means, this data is valid for a single HTTP Request . There are many confusion around regarding storing data in HttpContext.Current.
3. Access user's status using Httpcontext class This is another area where the Httpcontext class plays a useful role. In this example we will implement Window's authentication and we will print the username from the context class. Then we will check the IsAuthenticated property.
ASP.NET Core apps access HttpContext through the IHttpContextAccessor interface and its default implementation HttpContextAccessor. It's only necessary to use IHttpContextAccessor when you need access to the HttpContext inside a service. The Razor Pages PageModel exposes the HttpContext property:
You can use Claims for this purpose. The default MVC application has a method on the class representing users in the system called GenerateUserIdentityAsync. Inside that method there is a comment saying // Add custom user claims here. You can add additional information about the user here.
For example, suppose you wanted to add a favourite colour. You can do this by
public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
{
// Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
// Add custom user claims here
userIdentity.AddClaim(new Claim("favColour", "red"));
return userIdentity;
}
Inside your controller you can access the claim data by casting User.Identity to ClaimsIdentity (which is in System.Security.Claims) as follows
public ActionResult Index()
{
var FavouriteColour = "";
var ClaimsIdentity = User.Identity as ClaimsIdentity;
if (ClaimsIdentity != null)
{
var Claim = ClaimsIdentity.FindFirst("favColour");
if (Claim != null && !String.IsNullOrEmpty(Claim.Value))
{
FavouriteColour = Claim.Value;
}
}
// TODO: Do something with the value and pass to the view model...
return View();
}
Claims are good because they are stored in cookies so once you've loaded and populated them once on the server, you don't need to hit the database again and again to get at the information.
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