多个远程验证 ASP.NET MVC答案

【问题标题】：Multiple remote validations ASP.NET MVC多个远程验证 ASP.NET MVC
【发布时间】：2020-07-23 02:32:20
【问题描述】：

namespace EmployeeManagement.ViewModels 
{
    public class RegisterViewModel
    {
        [Required]
        [EmailAddress]
        [Remote(action:"IsEmailInUse" , controller:"Account")]
        [ValidEmailDomain(allowedDomain:"mail.com" , ErrorMessage ="Domain should be mail.com")]
        public string Email { get; set; }

        [Required]
        [DataType(DataType.Password)]
        public string Password { get; set; }

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

我正在对 Email 属性应用 ValidEmailDomain 和 IsEmailInUse 验证。我想将这两个验证都视为远程验证。我该怎么做？如果无法进行远程验证，我该如何将这两个验证放在一起

这是 ValidEmailDomain 的自定义验证代码

public class ValidateEmailDomainAttribute : ValidationAttribute
{
    private readonly string allowedDomain;

    public ValidEmailDomainAttribute(string allowedDomain )
    {
        this.allowedDomain = allowedDomain;
    }
    public override bool IsValid(object value)
    {
        string[] strings = value.ToString().Split('@');
        return strings[1].ToUpper() == allowedDomain.ToUpper();
    } Vali
}

这是 IsEmailInUse 的远程验证代码

[AcceptVerbs("Get","Post")]
    [AllowAnonymous]
    public async Task<IActionResult> IsEmailInUse(string email)
    {
         var user = await userManager.FindByEmailAsync(email);

        if(user == null)
        {
            return Json(true);
        }
        else
        {
            return Json($"Email {email} already in use");
        }
    }

【问题讨论】：

标签： asp.net-mvc validation asp.net-core

【解决方案1】：

我想将这两个验证都作为远程验证。

如果Email已经在使用，它必须有有效的域。只需将验证添加到远程方法：

[AcceptVerbs("Get", "Post")]
[AllowAnonymous]
public async Task<IActionResult> IsEmailInUse(string email)
{
    var user = await userManager.FindByEmailAsync(email);

    string[] strings = email.ToString().Split('@');
    var flag = strings[1].ToUpper() == "mail.com".ToUpper();

    if (user == null && flag==true)
    {
        return Json(true);
    }
    if(user!=null)
    {
        return Json($"Email {email} already in use");
    }
    else
    {
        return Json($"Email {email} domain is invalid");
    }
}

查看：

@model RegisterViewModel
    <form>
        <input asp-for="Email" />
        <span asp-validation-for="Email" class="text-danger"></span>
        @*more properties*@
    </form>
@section Scripts {
    @{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
}

【讨论】：