public async Task<ActionResult> ForgotPassword(ForgotPasswordViewModel model)
        {
            if (ModelState.IsValid)
            {
                var user = await UserManager.FindByNameAsync(model.Email);
                if (user == null || !(await UserManager.IsEmailConfirmedAsync(user.Id)))
                {
                    // 请不要显示该用户不存在或者未经确认
                    return View("ForgotPasswordConfirmation");
                }

                // 有关如何启用帐户确认和密码重置的详细信息,请访问 http://go.microsoft.com/fwlink/?LinkID=320771
                // 发送包含此链接的电子邮件
                // string code = await UserManager.GeneratePasswordResetTokenAsync(user.Id);
                // var callbackUrl = Url.Action("ResetPassword", "Account", new { userId = user.Id, code = code }, protocol: Request.Url.Scheme);
                // await UserManager.SendEmailAsync(user.Id, "重置密码", "请通过单击 <a href=\"" + callbackUrl + "\">此处</a>来重置你的密码");
                // return RedirectToAction("ForgotPasswordConfirmation", "Account");
            }

            // 如果我们进行到这一步时某个地方出错,则重新显示表单
            return View(model);
        }
        public async Task<ActionResult> ForgotPassword(ForgotPasswordViewModel model)
        {
            if (ModelState.IsValid)
            {
                var user = await UserManager.FindByNameAsync(model.Email);
                if (user == null || !(await UserManager.IsEmailConfirmedAsync(user.Id)))
                {
                    // Don't reveal that the user does not exist or is not confirmed
                    return View("ForgotPasswordConfirmation");
                }

                // For more information on how to enable account confirmation and password reset please visit http://go.microsoft.com/fwlink/?LinkID=320771
                // Send an email with this link
                // string code = await UserManager.GeneratePasswordResetTokenAsync(user.Id);
                // var callbackUrl = Url.Action("ResetPassword", "Account", new { userId = user.Id, code = code }, protocol: Request.Url.Scheme);		
                // await UserManager.SendEmailAsync(user.Id, "Reset Password", "Please reset your password by clicking <a href=\"" + callbackUrl + "\">here</a>");
                // return RedirectToAction("ForgotPasswordConfirmation", "Account");
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }