[英]Anyone got a Date of Birth Validation Attribute for C# MVC?
Someone must have written this before :-)一定有人以前写过这个:-)
I need a validation attribute for date of birth that checks if the date is within a specific range - ie the user hasn't inputted a date that hasn't yet happened or is 150 years in the past.我需要一个出生日期的验证属性,用于检查日期是否在特定范围内 - 即用户尚未输入尚未发生的日期或过去 150 年的日期。
Thanks for any pointers!感谢您的任何指点!
[DateOfBirth(MinAge = 0, MaxAge = 150)]
public DateTime DateOfBirth { get; set; }
// ...
public class DateOfBirthAttribute : ValidationAttribute
{
public int MinAge { get; set; }
public int MaxAge { get; set; }
public override bool IsValid(object value)
{
if (value == null)
return true;
var val = (DateTime)value;
if (val.AddYears(MinAge) > DateTime.Now)
return false;
return (val.AddYears(MaxAge) > DateTime.Now);
}
}
You could use the built-in
Range
attribute :
您可以使用内置的
Range
属性:
[Range(typeof(DateTime), DateTime.Now.AddYears(-150).ToString("yyyy-MM-dd"), DateTime.Now.ToString("yyyy-MM-dd"), ErrorMessage = "Date of birth must be sane!")] public DateTime DateOfBirth { get; set; }
I made a Validate class where I can validate data.我创建了一个 Validate 类,我可以在其中验证数据。 In my class I have 2 methods for validating date of birth: 1 that takes a string parameter and the other takes a date parameter.
在我的课程中,我有两种验证出生日期的方法:一种采用字符串参数,另一种采用日期参数。 Here is the basic method:
下面是基本方法:
public static bool DateOfBirthDate(DateTime dtDOB) //assumes a valid date string
{
int age = GetAge(dtDOB);
if (age < 0 || age > 150) { return false; }
return true;
}
Here is the full class:这是完整的课程:
using System;
using System.Collections.Generic;
using System.Text;
namespace YourNamespaceHere
{
public class Validate
{
public static bool DateOfBirthString(string dob) //assumes a valid date string
{
DateTime dtDOB = DateTime.Parse(dob);
return DateOfBirthDate(dtDOB);
}
public static bool DateOfBirthDate(DateTime dtDOB) //assumes a valid date
{
int age = GetAge(dtDOB);
if (age < 0 || age > 150) { return false; }
return true;
}
public static int GetAge(DateTime birthDate)
{
DateTime today = DateTime.Now;
int age = today.Year - birthDate.Year;
if (today.Month < birthDate.Month || (today.Month == birthDate.Month && today.Day < birthDate.Day)) { age--; }
return age;
}
}
}
Here is how I'm calling the method in my Xamarin.Forms app:以下是我在 Xamarin.Forms 应用程序中调用该方法的方式:
bool valid = Validate.DateOfBirthDate(pickerDOB.Date);
Where pickerDOB is a date picker on my form.其中pickerDOB 是我表单上的日期选择器。 This makes it easy to call the validation methods from anywhere and validate a string or DateTime object.
这使得从任何地方调用验证方法并验证字符串或 DateTime 对象变得容易。
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