How do I validate models in ASP.NET MVC?
In ASP.NET MVC, you can validate models using data annotations. You can apply attributes like [Required], [StringLength], and [Range] to your model properties.
Can you give me an example of using data annotations?
Sure! For instance, if you have a model property for an email, you can use [EmailAddress] to ensure the input is a valid email format.
What if I need custom validation?
You can create a custom validation attribute by inheriting from ValidationAttribute and overriding the IsValid method.
How do I display validation messages in the view?
You can use Html.ValidationMessageFor() in your Razor view to display validation messages next to the input fields.
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