.NET 8.0 𝗗𝗮𝘁𝗮 𝗔𝗻𝗻𝗼𝘁𝗮𝘁𝗶𝗼𝗻𝘀 🚩Complete Example with C#

⭐ .NET 8 introduces a range of new data annotations that enhance data validation, making it simpler to enforce data integrity and business rules.

.NET 8.0 𝗗𝗮𝘁𝗮 𝗔𝗻𝗻𝗼𝘁𝗮𝘁𝗶𝗼𝗻𝘀 🚩Complete Example with C#

✅ Length Attribute: Ensures that string or collection lengths fall within a specified range.

✅ Range Attribute with Minimum/Maximum Exclusivity: Validates numeric ranges with optional exclusivity settings.

✅ Base64String Attribute: Confirms that a string is a valid Base64 encoded representation.

✅ Allowed Values Attribute: Restricts a property to a set of predefined values.

✅ Denied Values Attribute: Ensures that a property does not include specific values.

🔥 These new annotations significantly boost the reliability, maintainability, and security of .NET applications by offering an easy yet powerful approach to enforcing data integrity and validation rules.

Here’s a simple example of using Data Annotations in C# with .NET 8.0 to define validation rules for a model class:

.NET 8.0 𝗗𝗮𝘁𝗮 𝗔𝗻𝗻𝗼𝘁𝗮𝘁𝗶𝗼𝗻𝘀 🚩Complete Example with C#

For Copy Code:

using System.ComponentModel.DataAnnotations;

namespace Console_Test
{
    public class User
    {
        public int Id { get; set; }

        [Required(ErrorMessage = "Username is required.")]
        [StringLength(50, MinimumLength = 3, ErrorMessage = "Username must be between 3 and 50 characters.")]
        public string Username { get; set; }

        [Required(ErrorMessage = "Email address is required.")]
        [EmailAddress(ErrorMessage = "Invalid email address format.")]
        public string Email { get; set; }

        [Required(ErrorMessage = "Password is required.")]
        [DataType(DataType.Password)]
        [StringLength(100, MinimumLength = 6, ErrorMessage = "Password must be between 6 and 100 characters.")]
        public string Password { get; set; }

        [Compare("Password", ErrorMessage = "Passwords do not match.")]
        [DataType(DataType.Password)]
        public string ConfirmPassword { get; set; }

        [Range(18, 120, ErrorMessage = "Age must be between 18 and 120.")]…