如何在ASP.NET MVC Web API中创建角色并将用户添加到角色

Question

我有一个用户个人帐户的.NET Web API项目.我可以使用标准模板AccountController注册用户.但是,我现在想要根据用户类型设置角色并将用户添加到角色.

DB中没有自动设置角色.如何设置角色以及如何将用户添加到角色？

我可以在此找到的唯一信息是基于旧的ASP.NET成员资格,因此未能为其设置存储过程.

已经在MSDN上搜索了论坛和教程,似乎无法找到Web API的示例.

Answer 1

您可以使用RoleManager添加角色...

using (var context = new ApplicationDbContext())
{
    var roleStore = new RoleStore<IdentityRole>(context);
    var roleManager = new RoleManager<IdentityRole>(roleStore);

    await roleManager.CreateAsync(new IdentityRole { Name = "Administrator" });

    var userStore = new UserStore<ApplicationUser>(context);
    var userManager = new UserManager<ApplicationUser>(userStore);

    var user = new ApplicationUser { UserName = "admin" };
    await userManager.CreateAsync(user);
    await userManager.AddToRoleAsync(user.Id, "Administrator");
}

你说文档现在有点亮了你是对的.但我发现,一旦你使用了RoleManager和UserManager,API就很容易被发现了(但也许并不总是直观的,有时候你必须直接针对商店甚至数据库上下文运行查询).

Answer 2

我花了一段时间才弄清楚,但我终于明白了.安东尼请原谅我,但要重新发布一些代码,以便像我这样的愚蠢的开发人员能够理解.

在最新的WebAPI2(Visual Studio 2013 Update 2)中,注册方法如下所示:

// POST api/Account/Register
[AllowAnonymous]
[Route("Register")]
public async Task<IHttpActionResult> Register(RegisterBindingModel model)
{
    if (!ModelState.IsValid)
    {
        return BadRequest(ModelState);
    }

    var user = new ApplicationUser() { UserName = model.Email, Email = model.Email };

    IdentityResult result = await UserManager.CreateAsync(user, model.Password);


    if (!result.Succeeded)
    {
        return GetErrorResult(result);
    }

    return Ok();
}

你想要做的是用这个替换它:

// POST api/Account/Register
[AllowAnonymous]
[Route("Register")]
public async Task<IHttpActionResult> Register(RegisterBindingModel model)
{
    if (!ModelState.IsValid)
    {
        return BadRequest(ModelState);
    }


    IdentityResult result;
    using (var context = new ApplicationDbContext())
    {
        var roleStore = new RoleStore<IdentityRole>(context);
        var roleManager = new RoleManager<IdentityRole>(roleStore);

        await roleManager.CreateAsync(new IdentityRole() { Name = "Admin" });

        var userStore = new UserStore<ApplicationUser>(context);
        var userManager = new UserManager<ApplicationUser>(userStore);

        var user = new ApplicationUser() { UserName = model.Email, Email = model.Email };

        result = await UserManager.CreateAsync(user, model.Password);
        await userManager.AddToRoleAsync(user.Id, "Admin");

    }

    if (!result.Succeeded)
    {
        return GetErrorResult(result);
    }

    return Ok();
}

现在当你发布它应该正确工作,但你可能会遇到另一个问题.在我这样做之后,我的回复抱怨了DB.

The model backing the <Database> context has changed since the database was created

要修复此错误,我必须进入程序包管理器控制台并启用迁移.

Enable-Migrations –EnableAutomaticMigrations

然后:

Add Migration

最后:

Update-Database

关于启用迁移的好帖子:http: //msdn.microsoft.com/en-us/data/jj554735.aspx