Personnalisé la composition et le Rôle de fournisseur de ASP.NET MVC 4

Je suggère d'utiliser ASP.Net de l'Identité à la place de la vieille membership.ASP.Net l'Identité est une façon meilleure et plus souple que l'ancien abonnement, il prend également en charge authentification basée sur les rôles à l'aide de filtres d'actions et vous pouvez mettre en œuvre vos propres fournisseurs (tels que le rôle et les fournisseurs d'utilisateur).

voir les liens ci-dessous

https://weblog.west-wind.com/posts/2015/Apr/29/Adding-minimal-OWIN-Identity-Authentication-to-an-Existing-ASPNET-MVC-Application

http://www.c-sharpcorner.com/article/create-identity-in-simple-ways-using-asp-net-mvc-5/

http://logcorner.com/how-to-configure-custom-membership-and-role-provider-using-asp-net-mvc4/
**for creating a CustomerMemberShipClass** your class must implement System.Web.Security.MembershipProvider abstarct class. and you override the method ValidateUser()
in this ValidateUser() you have to write your own logic based on which you want authenticate user and return true or false according to it.
Sample ValidateUser method 
public override bool ValidateUser(string username, string password)
{
int count=db.GetAll().Where(x => x.UserEmail == username && x.password == password).Count();
if (count != 0)
return true;
else
return false;
}
later in web.config file you have add the fallowing under <sytem.web> element
<membership defaultProvider="MyMembershipProvider">
<providers>
<clear/>
<add name="MyMembershipProvider" type="Write your class name that is implementing membershipproviderclas"/>
</providers>
</membership>
after doing this you can validate user using **MemberShip.Validate(Username,password)** which returns true or false based on ur code in ValidateUser() in CustomMemberShipProvider class and this will also set **[Authorize] attribute**
**for creating a CustomRoleProviderClass** your class must inherit System.Web.Secuirty.RoleProvider and override the appropriate method to get the roles for the user
SAmple method for getting roles for user
public override string[] GetRolesForUser(string username)
{
string[] str={db.GetAll().Where(x=>x.UserEmail==username).FirstOrDefault().Role};
return str;
}
after this you must add the fallowing in web.config file in <system.web> element
<roleManager enabled="true" defaultProvider="MyRoleProvider">
<providers>
<clear/>
<add name="MyRoleProvider" type="BLL.DoctorAppointmentRoleProvider"/>
</providers>
</roleManager>
and after this u can check the role of the user using attribute **[Authorize(role="admin"])** and in Razor view you can check using User.IsinROle("A").