MVC3 中的大于或等于今天日期验证注释

Question

有没有人见过需要单个选定日期等于或大于当前日期的日期验证的 MVC3 数据注释？

如果已经有第三方添加，那也很酷。我已经在使用 DataAnnotationsExtensions 但它没有提供我正在寻找的东西。

似乎没有任何关于此的参考。所以，希望有人在我尝试重新发明轮子并编写我自己的自定义验证器之前已经解决了这个问题。

我尝试过Range，但这需要2个日期，并且两者都必须是字符串格式的常量，例如[Range(typeof(DateTime), "1/1/2011", "1/1/2016")]，但这无济于事。并且 DataAnnotationsExtensions Min 验证器只接受 int 和 double

---

更新已解决

感谢@BuildStarted，这就是我最终得到的结果，它在服务器端运行良好，现在与我的脚本一起在客户端运行

---

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Web.Mvc;

namespace Web.Models.Validation {

    [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
    public sealed class DateMustBeEqualOrGreaterThanCurrentDateValidation : ValidationAttribute, IClientValidatable {

        private const string DefaultErrorMessage = "Date selected {0} must be on or after today";

        public DateMustBeEqualOrGreaterThanCurrentDateValidation()
            : base(DefaultErrorMessage) {
        }

        public override string FormatErrorMessage(string name) {
            return string.Format(DefaultErrorMessage, name);
        }  

        protected override ValidationResult IsValid(object value, ValidationContext validationContext) {
            var dateEntered = (DateTime)value;
            if (dateEntered < DateTime.Today) {
                var message = FormatErrorMessage(dateEntered.ToShortDateString());
                return new ValidationResult(message);
            }
            return null;
        }

        public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context) {
            var rule = new ModelClientCustomDateValidationRule(FormatErrorMessage(metadata.DisplayName));
            yield return rule;
       }
    }

    public sealed class ModelClientCustomDateValidationRule : ModelClientValidationRule {

        public ModelClientCustomDateValidationRule(string errorMessage) {
            ErrorMessage = errorMessage;
            ValidationType = "datemustbeequalorgreaterthancurrentdate";
        }
    }
}

在我的模型中

[Required]
[DateMustBeEqualOrGreaterThanCurrentDate]
public DateTime SomeDate { get; set; }

客户端脚本

/// <reference path="jquery-1.7.2.js" />

jQuery.validator.addMethod("datemustbeequalorgreaterthancurrentdate", function (value, element, param) {
    var someDate = $("#SomeDate").val();
    var today;
    var currentDate = new Date();
    var year = currentDate.getYear();
    var month = currentDate.getMonth() + 1;  // added +1 because javascript counts month from 0
    var day = currentDate.getDate();
    var hours = currentDate.getHours();
    var minutes = currentDate.getMinutes();
    var seconds = currentDate.getSeconds();

    today = month + '/' + day + '/' + year + '  ' + hours + '.' + minutes + '.' + seconds;

    if (someDate < today) {
        return false;
    }
    return true;
});

jQuery.validator.unobtrusive.adapters.addBool("datemustbeequalorgreaterthancurrentdate");

Answer 1

创建自定义属性。

public class CheckDateRangeAttribute: ValidationAttribute {
    protected override ValidationResult IsValid(object value, ValidationContext validationContext) {
        DateTime dt = (DateTime)value;
        if (dt >= DateTime.UtcNow) {
            return ValidationResult.Success;
        }

        return new ValidationResult(ErrorMessage ?? "Make sure your date is >= than today");
    }

}

代码是即兴写的，所以请修正所有错误:)

Answer 2

使用[Remote] 进行特殊验证，简单易行：

你的模型：

[Remote("ValidateDateEqualOrGreater", HttpMethod="Post", 
    ErrorMessage = "Date isn't equal or greater than current date.")]
public DateTime Date { get; set; }
//other properties

你的行动：

[HttpPost]
public ActionResult ValidateDateEqualOrGreater(DateTime Date)
{
     // validate your date here and return True if validated
     if(Date >= DateTime.Now)
     {
       return Json(true);
     }
     return Json(false);    
}

Answer 3

完成此任务的简单方法是使用CompareValidator。

下面的代码使用了 AjaxControlToolKit 的CalendarExtender。 将以下代码复制到您的 HTML 指令中

<asp:TextBox ID="txtCompletionDate" runat="server" CssClass="txtNormal"></asp:TextBox>
                        <cc1:CalendarExtender ID="CalendarExtender1" TargetControlID="txtCompletionDate"
                            Format="dd/MM/yyyy" runat="server">
                        </cc1:CalendarExtender>
                        <asp:RequiredFieldValidator ID="rfvCompletionDate" runat="server" ControlToValidate="txtCompletionDate"
                            CssClass="labelError" ErrorMessage="*"></asp:RequiredFieldValidator>
                        <asp:CompareValidator ID="cvDate" runat="server" ControlToCompare="hiddenbox" ErrorMessage="*"
                            ControlToValidate="txtCompletionDate" CssClass="labelError" ToolTip="Completion  Date should be greater than or equal to Today"
                            Operator="GreaterThanEqual" Type="Date"></asp:CompareValidator>                        
                        <asp:TextBox ID="hiddenbox" runat="server" CssClass="hiddenbox">
</asp:TextBox>

在 CSS 中添加以下行

.hiddenbox {display:none;}