如何将条件必需属性放入类属性以使用 WEB API? [英] How to put conditional Required Attribute into class property to work with WEB API?
本文介绍了如何将条件必需属性放入类属性以使用 WEB API?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我只想放置与WEB API
示例
public sealed class EmployeeModel
{
[Required]
public int CategoryId{ get; set; }
public string Email{ get; set; } // If CategoryId == 1 then it is required
}
我通过 (ActionFilterAttribute) 使用模型状态验证
I am using Model State validation via (ActionFilterAttribute)
推荐答案
您可以实现自己的 ValidationAttribute
.也许是这样的:
You can implement your own ValidationAttribute
. Perhaps something like this:
public class RequireWhenCategoryAttribute : ValidationAttribute
{
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
var employee = (EmployeeModel) validationContext.ObjectInstance;
if (employee.CategoryId == 1)
return ValidationResult.Success;
var emailStr = value as string;
return string.IsNullOrWhiteSpace(emailStr)
? new ValidationResult("Value is required.")
: ValidationResult.Success;
}
}
public sealed class EmployeeModel
{
[Required]
public int CategoryId { get; set; }
[RequireWhenCategory]
public string Email { get; set; } // If CategoryId == 1 then it is required
}
这只是一个示例.它可能存在投射问题,我不确定这是解决此问题的最佳方法.
This is just a sample. It may have casting issues, and I'm not sure this is the best approach to solve this problem.
这篇关于如何将条件必需属性放入类属性以使用 WEB API?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文