的多个属性类型=“电子邮件”不适用于 ASP.Net-Core

发布于 2025-01-14 19:44:13 字数 644 浏览 4 评论 0原文

在 ASP 下，我们可以将控件与具有成员的模型绑定

   public string Contact { get; set; }

，或者直接或通过相应的 HTML helper

我们也可以使用数据注释而不是在 Razor 页面中隐式声明类型

   [EmailAddress]
   public string Contact { get; set; }

但是，如果我想输入以逗号分隔的电子邮件地址列表，该怎么办？

无界 HTML5 代码在最新浏览器下工作是正确的： type="email" 的多个属性不起作用。但是，当我尝试将其绑定到模型时，看起来 EmailAddressAttribute 已应用于模型，并且只能验证一个电子邮件地址

原文

Under ASP we could bound a control with a model which has member

   public string Contact { get; set; }

or directly <input type="email" asp-for="item.Contact"> or through corresponding HTML helper

As well we could use Data Annotation instead of implicitly declare type in Razor page

   [EmailAddress]
   public string Contact { get; set; }

But what to do if I would like to enter the list of email addresses separated by comma?

It is correct that unbounded HTML5 code <input type="email" multiple> works under latest browsers:
Multiple attribute for type="email" does not work. But when I am trying to bound it to the model it looks like EmailAddressAttribute is applied to the model and only one email address could be validated

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聚集的泪 2025-01-21 19:44:13

就像@pcalkins所说，浏览器不会为你分离它，你必须实现一些拆分电子邮件功能，如下所示

// 1. put this helper in your utilty class
private IEnumerable<string> GetEmails(string input)
{
    if (String.IsNullOrWhiteSpace(input)) yield break;
    MatchCollection matches = Regex.Matches(input, @"[^\s<]+@[^\s,>]+");
    foreach (Match match in matches) yield return match.Value;
}

// 2. now call it to get list of emails
// for e.g. string strEmails = "Last, First <[email protected]>, [email protected], First Last <[email protected]>..";
string allContactsWithCommas = model.contactsWithCommas;
IEnumerable<string> emails = GetEmails(allContactsWithCommas );

// 3. try to give it something custom to validate
//[Required, MinLength(1, ErrorMessage = "Some validation error")]
[YourClassHoldingObject]
public List<int> Contact { get; set; }

// 4. or implement something custom in for your validation object, so the broswer knows how to handle/waht to call for validation
public class YourClassHoldingObject : IValidatableObject
{
    [Required]
    List<int> Contact 

    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {
    // your contact logic validation here
        if (Contact.Count < 1)
        {

            // some validation using System.ComponentModel.DataAnnotations
            // - please customize for your needs
            yield return new ValidationResult(
                $"At least one email should be specified.", new[] 
                { System.ComponentModel.DataAnnotations.EmailAddressAttribute().IsValid(
                // for e.g. "[email protected]") });
                Contact) });
        }
    }   
}

Like @pcalkins said, the browsers will not separate it for you, you have to implement some split emails functionality like so

// 1. put this helper in your utilty class
private IEnumerable<string> GetEmails(string input)
{
    if (String.IsNullOrWhiteSpace(input)) yield break;
    MatchCollection matches = Regex.Matches(input, @"[^\s<]+@[^\s,>]+");
    foreach (Match match in matches) yield return match.Value;
}

// 2. now call it to get list of emails
// for e.g. string strEmails = "Last, First <[email protected]>, [email protected], First Last <[email protected]>..";
string allContactsWithCommas = model.contactsWithCommas;
IEnumerable<string> emails = GetEmails(allContactsWithCommas );

// 3. try to give it something custom to validate
//[Required, MinLength(1, ErrorMessage = "Some validation error")]
[YourClassHoldingObject]
public List<int> Contact { get; set; }

// 4. or implement something custom in for your validation object, so the broswer knows how to handle/waht to call for validation
public class YourClassHoldingObject : IValidatableObject
{
    [Required]
    List<int> Contact 

    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {
    // your contact logic validation here
        if (Contact.Count < 1)
        {

            // some validation using System.ComponentModel.DataAnnotations
            // - please customize for your needs
            yield return new ValidationResult(
                quot;At least one email should be specified.", new[] 
                { System.ComponentModel.DataAnnotations.EmailAddressAttribute().IsValid(
                // for e.g. "[email protected]") });
                Contact) });
        }
    }   
}

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