Class ValidationError

Represents a validation error (HTTP 400/422 equivalent). Use when input data fails validation rules.

public class ValidationError : Reason<ValidationError>, IError, IReason

Inherited Members: Reason<ValidationError>.WithMessage(string)

Reason<ValidationError>.WithTag(string, object)

Reason<ValidationError>.WithTags(params (string key, object value)[])

Reason<ValidationError>.WithTagsFrom(ImmutableDictionary<string, object>)

Reason.Message

Reason.Tags

Reason.ToString()

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

Extension Methods: TagAccessExtensions.FormatTags(IReason, string)

TagAccessExtensions.GetTagBool(IReason, string, bool)

TagAccessExtensions.GetTagDecimal(IReason, string, decimal)

TagAccessExtensions.GetTagInt(IReason, string, int)

TagAccessExtensions.GetTagKeys(IReason)

TagAccessExtensions.GetTagString(IReason, string, string)

TagAccessExtensions.GetTag<T>(IReason, string, T?)

TagAccessExtensions.GetTags(IReason)

TagAccessExtensions.HasTag(IReason, string)

TagAccessExtensions.RequireTag<T>(IReason, string)

ValidationExtensions.EnsureNotNull<TCollection>(TCollection?, string, string?)

Examples

Result<User>.Fail(new ValidationError("Email", "Invalid email format"));
Result<User>.Fail(new ValidationError("Name is required"));

public ValidationError(string message)

public ValidationError(string fieldName, string message)

public string? FieldName { get; }

Factory method for creating new instances (maintains immutability). Must be implemented by derived classes.

protected override ValidationError CreateNew(string message, ImmutableDictionary<string, object> tags)