如何从MVC 5中连接到AspNetUsers表的数据库表中获取数据

Question

我已经在AspNetUsers表中将 DepartmentId列添加为外键，并且在另一个表中也具有与ForeignKey相同的DepartmentId称为MaterialRequest，我希望登录用户的部门名称在“部门名称”视图中显示

我的课程

部

DepartmentId DepartmentName

MaterialRequest

MaterialRequestId MaterialName部门编号

我尝试过的

        public ActionResult Index(int? id)
        {
  var user = User.Identity.GetUserId();
            ViewBag.DeptName=db.Query<AspNetUser>("Select DepartmentId from AspNetUsers where Id = '@0'",id);
}

Answer 1

有一种解决方法，您可以创建索赔并获得以下方式：

public class ApplicationUser : IdentityUser
{
    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
    // Add custom user claims here => this.DepartmentId is a value stored in database against the user
    userIdentity.AddClaim(new Claim("DepartmentId", this.DepartmentId.ToString()));

        return userIdentity;
    }

    // Your Extended Properties
    public int? DepartmentId { get; set; }
}

然后创建一个扩展方法来获取您的departmentId：

namespace App.Extensions
{
    public static class IdentityExtensions
    {
        public static string GetDepartmentId(this IIdentity identity)
        {
            var claim = ((ClaimsIdentity)identity).FindFirst("DepartmentId");
            // Test for null to avoid issues during local testing
            return (claim != null) ? claim.Value : string.Empty;
        }
    }
}

现在，您可以轻松地调用此方法来获取DepartmentId：

var departmentId= User.Identity.GetDepartmentId();