在ASP中使用用户名而不是电子邮件注册.asp.net MVC 5

Question

我将RegisterViewModel改为使用Username而不是Email，并且在Register POST方法中初始化new ApplicationUser时省略了email部分:

       public async Task<ActionResult> Register(RegisterViewModel model)
        {
            if (ModelState.IsValid)
            {
                var user = new ApplicationUser { UserName = model.Username/*, Email = model.Username*/ };
...

但是当我用用户名注册时，我得到错误:

Email不能为空

我该如何解决这个问题，是否有一种方法不允许相同的用户名?

Answer 1

您可以将RegisterViewModel更改为

public class RegisterViewModel 
{
    [Remote("IsUserNameExist", "User", "", ErrorMessage = "this username exist", HttpMethod = "POST")]
    public string UserName { set; get; }
    //todo: other fileds......
}

并在UserController

中写入您的存在验证操作结果

    [HttpPost]
    [AllowAnonymous]
    [OutputCache(Location = OutputCacheLocation.None, NoStore = true,  Duration = 0, VaryByParam = "*")]
    public virtual JsonResult IsUserNameExist(string userName)
    {
        var check = _userService.CheckUserNameExist(userName);
        return check ? Json(false) : Json(true);
    }