Question

我正在使用Code First迁移构建MVC 5应用程序，并尝试使用默认管理员用户为我的数据库设定种子。我可能在这里做出错误的假设，但我认为我需要使用异步方法来添加用户和角色，因为我收到的错误是关于之前不存在的用户。现在，当我在软件包管理器控制台中运行update-database命令时，它会崩溃Visual Studio 2013。我不知所措。

我在崩溃之前没有收到错误，而且我还没弄清楚如何在PMC中调试代码运行。这是我的种子方法中的代码：

        //Add default users here:
        var UserManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(context));
        var RoleManager = new RoleManager<IdentityRole>(new RoleStore<IdentityRole>(context));
        var silkster = new NewUser() { UserName = "silkster", Password = "Passw0rd!", Email = "dan@silkster.com", Roles = new List<string>() { "Admin" } };

        var defaultUser = await UserManager.FindByNameAsync(silkster.UserName);
        var newUserResult = IdentityResult.Success;

        if (defaultUser == null)
        {
            var user = new ApplicationUser() { UserName = silkster.UserName, Email = silkster.Email };
            newUserResult = await UserManager.CreateAsync(user, silkster.Password);
        }

        if (newUserResult == IdentityResult.Success)
        {
            var results = new List<IdentityResult>();
            IdentityResult result;
            foreach (string role in silkster.Roles)
            {
                if (!RoleManager.RoleExists(role))
                {
                    result = await RoleManager.CreateAsync(new IdentityRole(role));
                    results.Add(result);
                }
                result = await UserManager.AddToRoleAsync(silkster.UserName, role);
                results.Add(result);
            }
        }

Answer 1

我找到了一些帮助我解决Visual Studio崩溃问题的信息here。

将此方法添加到Configuration.cs：

    protected async Task<bool> AddRoleAndUser(ZTTDD.Models.ApplicationDbContext context, NewUser newUser)
    {
        var UserManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(context));
        var RoleManager = new RoleManager<IdentityRole>(new RoleStore<IdentityRole>(context));
        IdentityResult result = IdentityResult.Success; 

        var user = UserManager.FindByName(newUser.UserName);

        if (user != null)
        {
            user = new ApplicationUser() { UserName = newUser.UserName, Email = newUser.Email };
            result = await UserManager.CreateAsync(user, newUser.Password);

            if (!result.Succeeded)
                Console.Write("Unable to create user: " + newUser.UserName);
                return false;

        }

        foreach (string r in newUser.Roles)
        {
            if (!RoleManager.RoleExists(r))
            {
                var role = new IdentityRole(r);
                result = await RoleManager.CreateAsync(role);
                if (!result.Succeeded)
                    Console.Write("Unable to create role: " + r);
                    return false;
            }

            result = await UserManager.AddToRoleAsync(user.Id, r);
            if (!result.Succeeded)
            {
                Console.Write("Unable to add user '" + newUser.UserName + "' to role '" + r + "'.");
            }
        }

        return result.Succeeded;
    }

然后我在Seed方法中重构了我的代码，如下所示：

        var silkster = new NewUser() { UserName = "silkster", Password = "Passw0rd!", Email = "dan@silkster.com", Roles = new List<string>() { "Admin" } };
        var seedUserSuccess = await AddRoleAndUser(context, silkster);
        if (!seedUserSuccess)
        {
            Console.Write("Seeding failed for user: " + silkster.UserName);
        }

ASP.NET MVC 5应用程序种子方法崩溃Visual Studio 2013添加默认用户＆amp;角色

1 个答案: