英文:
Checking Property value: Data validation using Data Annotations - .NET
问题
我想要验证属性值是否设置为特定文本。我查阅了[验证文档](https://www.tutorialsteacher.com/mvc/implement-validation-in-asp.net-mvc)并了解到有许多选项，如必填项，非常有帮助。但我没有找到确保属性具有特定值的选项。是否可以使用数据注释来实现？是否可以使用正则表达式？
即：
ClassName属性必须设置为“science”。是否有用于属性值的数据注释？是否有正则表达式？
英文:
I am wanting to validate that a property value is set to a specific text. I came across [validation] (https://www.tutorialsteacher.com/mvc/implement-validation-in-asp.net-mvc) and saw how there are many options such as Required which is very helpful. But I do not see one to ensure that a property has a specific value. Is there a way I can do that using data annotations? Is regular expression for that?
i.e.
ClassName property must be set to "science". Is there a data annotation for property values? Is regular expression for that?
public class Student{
[DataAnnotation("science")]
public string ClassName{ get; set; }
}
I have searched over a few articles and still cannot find the solution to my problem. Would like to know if this is possible with data annotations?
答案1
得分: 0
请使用CustomValidationAttribute。请参考以下链接：
https://learn.microsoft.com/en-us/previous-versions/aspnet/cc668224(v=vs.100)
https://www.codeproject.com/Tips/5257153/How-to-Create-Custom-Validation-Attribute-in-Cshar
基本上，这些属性将具有IsValid函数。在您的情况下，您可以将验证设置为属性值== science。
英文:
You need to Use CustomValidationAttribute. Please refer below
https://learn.microsoft.com/en-us/previous-versions/aspnet/cc668224(v=vs.100)
https://www.codeproject.com/Tips/5257153/How-to-Create-Custom-Validation-Attribute-in-Cshar
Basically, these attributes will have Isvalid function. In you case you can put the validation as Property value == science
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