使用数据注释部分验证模型属性

Question

我已经使用数据注释对模型属性设置了两个验证，如下所示：

 [MinLength(8, ErrorMessage = "Password Requires at least one letter, one number and 8 characters long")]
 [Required(ErrorMessage = "Password Required")]
 public string Password { get; set; }

我想在某些特殊情况下进行部分验证。例如，我不想在用户登录时检查最小长度，而只是在注册时检查。

任何人都知道如何实现这一目标吗？

Answer 1

注册和登录使用不同的 ViewModel，就像默认的 asp.net-mvc 实现一样。

你最终会得到 3 个 classes：你的模型本身，一个登录 class 和一个注册 class。唯一具有密码长度验证的 class 应该是模型本身，而不是视图模型。使用您的控制器，然后您应该从 ViewModel 填充到模型（在执行 Posts 时）或从模型填充到 ViewModel（在执行 Gets 时）

登录 ViewModel 示例（取自默认 MVC 代码）

public class LoginViewModel
{
    [Required]
    [Display(Name = "Email")]
    [EmailAddress]
    public string Email { get; set; }

    [Required]
    [DataType(DataType.Password)]
    [Display(Name = "Password")]
    public string Password { get; set; }

    [Display(Name = "Remember me?")]
    public bool RememberMe { get; set; }
}

还有一个 Register ViewModel，也是来自默认的 MVC

public class RegisterViewModel
{
    [Required]
    [EmailAddress]
    [Display(Name = "Email")]
    public string Email { get; set; }

    [Required]
    [StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]
    [DataType(DataType.Password)]
    [Display(Name = "Password")]
    public string Password { get; set; }

    [DataType(DataType.Password)]
    [Display(Name = "Confirm password")]
    [Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
    public string ConfirmPassword { get; set; }
}

Register ViewModel 和模型本身的使用示例，所有默认 MVC

[HttpPost]
    [AllowAnonymous]
    [ValidateAntiForgeryToken]
    public async Task<ActionResult> Register(RegisterViewModel model)
    {
        if (ModelState.IsValid)
        {
            var user = new ApplicationUser { UserName = model.Email, Email = model.Email };
            var result = await UserManager.CreateAsync(user, model.Password);
            if (result.Succeeded)
            {
                await SignInManager.SignInAsync(user, isPersistent:false, rememberBrowser:false);

                // 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.GenerateEmailConfirmationTokenAsync(user.Id);
                // var callbackUrl = Url.Action("ConfirmEmail", "Account", new { userId = user.Id, code = code }, protocol: Request.Url.Scheme);
                // await UserManager.SendEmailAsync(user.Id, "Confirm your account", "Please confirm your account by clicking <a href=\"" + callbackUrl + "\">here</a>");

                return RedirectToAction("Index", "Home");
            }
            AddErrors(result);
        }

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

使用数据注释部分验证模型属性

Partially validate model property using data annotation

c#

asp.net-mvc

data-annotations

使用数据注释部分验证模型 属性

Partially validate model property using data annotation

c#

asp.net-mvc

data-annotations

使用数据注释部分验证模型属性