ASP.NET Core Web API：如何发送含账号密码的无链接令牌注册通知邮件

1. 创建新的账号信息邮件模板 #

在StaticFiles/Html目录下新建RegisterInfo.html，内容如下：

<h3>账号注册成功通知</h3>
<p>您好，您的账号已成功创建，以下是您的账号信息：</p>
<p>用户名：<strong>**username**</strong></p>
<p>密码：<strong>**password**</strong></p>
<p>请妥善保管您的账号信息，避免泄露。</p>

2. 修改邮件内容构建方法 #

替换原有的GetEmailBody方法（或新增专门的方法），用于替换模板中的用户名和密码占位符：

public static async Task<string> GetRegistrationInfoEmailBody(string emailTempPath, string username, string password)
{
    var templateContent = await File.ReadAllTextAsync(Path.Combine(Directory.GetCurrentDirectory(), emailTempPath));
    return templateContent
        .Replace("**username**", username)
        .Replace("**password**", password);
}

3. 简化Register方法，移除验证令牌相关逻辑 #

修改Register方法，删除令牌生成、角色获取等无用代码，替换为账号信息邮件的生成逻辑：

public async Task<Response<string>> Register(RegisterUserDto model)
{
    var user = _mapper.Map<AppUser>(model);
    user.IsActive = true;
    var response = new Response<string>();
    
    using (var transaction = new TransactionScope(TransactionScopeAsyncFlowOption.Enabled))
    {
        var result = await _userManager.CreateAsync(user, model.Password);
        if (result.Succeeded)
        {
            await _userManager.AddToRoleAsync(user, UserRoles.Customer);
            
            // 生成账号信息邮件内容
            var mailBody = await EmailBodyBuilder.GetRegistrationInfoEmailBody(
                emailTempPath: "StaticFiles/Html/RegisterInfo.html",
                username: model.UserName, // 或使用user.UserName，根据实际字段调整
                password: model.Password
            );
            
            var mailRequest = new MailRequest()
            {
                Subject = "账号注册成功通知",
                Body = mailBody,
                ToEmail = model.Email
            };

            bool emailResult = await _mailService.SendEmailAsync(mailRequest); 
            if (emailResult)
            {
                _logger.Information("邮件发送成功");
                var customer = new Customer
                {
                    AppUser = user
                };
                await _unitOfWork.Customers.InsertAsync(customer);
                await _unitOfWork.Save();
                
                response.StatusCode = (int)HttpStatusCode.Created;
                response.Succeeded = true;
                response.Data = user.Id;
                response.Message = "用户创建成功！请查看邮箱获取账号信息。";
                transaction.Complete();
                return response;
            }
            
            _logger.Information("邮件服务发送失败");
            transaction.Dispose();
            response.StatusCode = (int)HttpStatusCode.BadRequest;
            response.Succeeded = false;
            response.Message = "注册失败，请重试";
            return response;
        }
        
        response.Message = GetErrors(result);
        response.StatusCode = (int)HttpStatusCode.BadRequest;
        response.Succeeded = false;
        transaction.Complete();
        return response;
    };
}

4. 清理无用代码（可选） #

如果原有的GetEmailBody方法（处理验证链接的）不再使用，可以直接删除，减少冗余。

内容的提问来源于stack exchange，提问作者Ayobamilaye