Identity Framework 3 is in release candidate along with ASP.Net 5.
The problem
I set up a web project in ASP.Net 5 and created a controller for user import. It’s just some simple code that attempts to add multiple users. Adding a single user works great, but if I attempt to perform multiple operations in one go I run into problems.
- Adding multiple users gives me “Collection was modified; enumeration operation may not execute” on second user.
- Attempting to update the password for more multiple users gives me “Cannot access a disposed object” on second user.
The problem turned out to be me calling my commands in “async void” methods. (public async void MyMethod(…) { … }). Changing it to “public async Task” instead and awaiting it to finish seems to solve the problem.
But in case someone needs it, here is the solution I used for manually adding users.
My solution
By digging into the source code of Identity Framework I figured out how to fill the user objects myself.
Here is a simple method to get you going. Note that it required your DbContext to inherit from IdentityDbContext<ApplicationUser>.
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 |
private static PasswordHasher<ApplicationUser> _passwordHasher = new PasswordHasher<ApplicationUser>(); private static void AddUser(DbContext dbContext, ApplicationUser user, string userPassword) { // If you need to generate user id this is how // But no need - it is done automatically when you create user object //user.Id = Guid.NewGuid().ToString(); // Normally done by UserManager.CreateAsync user.PasswordHash = _passwordHasher.HashPassword(user, userPassword); user.SecurityStamp = Guid.NewGuid().ToString(); user.LockoutEnabled = true; if (!string.IsNullOrWhiteSpace(user.Email)) user.NormalizedEmail = user.Email.Normalize().ToUpperInvariant(); if (!string.IsNullOrWhiteSpace(user.UserName)) user.NormalizedUserName = user.UserName.Normalize().ToUpperInvariant(); // End of stuff done by UserManager.CreateAsync // You may want to use AddRange to optimize inserts dbContext.Add(user); // And only call SaveChanges() once you've added all users, so if you add many users you want to comment this out and all it yourself at the end dbContext.SaveChanges(); } |
It seems that Actipro CodeHighlighter has screwed up your code.
Thanks. Issue with code pasted from old Live Writer-plugin.