ASP.NET身份2中没有内置的function。最简单的方法是在用户上添加一个字段，如LastPasswordChangedDate 。 然后在每次授权期间检查此字段。

 public class ApplicationOAuthProvider : OAuthAuthorizationServerProvider { public override async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context) { var user = await GetUser(context.UserName, context.Password); if(user.LastPasswordChangedDate.AddDays(20) < DateTime.Now) // user needs to change password } } 

再加上@Rikard的回答……

我将LastPasswordChangedDate添加到我的ApplicationUser模型中，如下所示：

  public class ApplicationUser : IdentityUser { public DateTime LastPasswordChangedDate { get; set; } public async Task GenerateUserIdentityAsync(UserManager 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 return userIdentity; } } 

向AccountController添加静态配置设置（稍后您将在Login() ：

 private static readonly int PasswordExpireDays = Convert.ToInt32(ConfigurationManager.AppSettings["PasswordExpireDays"]); 

然后，在Login期间，检查用户是否应重置密码。 这仅在成功登录后进行检查，以免对用户造成太多错误。

  [HttpPost] [AllowAnonymous] [ValidateAntiForgeryToken] public async Task Login(LoginViewModel model, string returnUrl) { if (!ModelState.IsValid) { return View(model); } // This doesn't count login failures towards account lockout // To enable password failures to trigger account lockout, change to shouldLockout: true var result = await SignInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, shouldLockout: false); switch (result) { case SignInStatus.Success: var user = await UserManager.FindByNameAsync(model.Email); if (user.LastPasswordChangedDate.AddDays(PasswordExpireDays) < DateTime.UtcNow) { return RedirectToAction("ChangePassword", "Manage"); } else { return RedirectToLocal(returnUrl); } case SignInStatus.LockedOut: return View("Lockout"); case SignInStatus.RequiresVerification: return RedirectToAction("SendCode", new { ReturnUrl = returnUrl, RememberMe = model.RememberMe }); case SignInStatus.Failure: default: ModelState.AddModelError("", "Error: Invalid username or password"); return View(model); } } 

在ManageController，ChangePassword操作中，确保在用户成功更新密码时更新LastPasswordChangedDate ：

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  [HttpPost] [ValidateAntiForgeryToken] public async Task ChangePassword(ChangePasswordViewModel model) { if (!ModelState.IsValid) { return View(model); } var result = await UserManager.ChangePasswordAsync(User.Identity.GetUserId(), model.OldPassword, model.NewPassword); if (result.Succeeded) { var user = await UserManager.FindByIdAsync(User.Identity.GetUserId()); if (user != null) { user.LastPasswordChangedDate = DateTime.UtcNow; await UserManager.UpdateAsync(user); await SignInManager.SignInAsync(user, isPersistent: false, rememberBrowser: false); } return RedirectToAction("Index", new { Message = ManageMessageId.ChangePasswordSuccess }); } AddErrors(result); return View(model); }