FluentValidation 7.4.0

A validation library for .NET that uses a fluent interface to construct strongly-typed validation rules.

Showing the top 20 packages that depend on FluentValidation.

Packages Downloads
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
9
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
8
FluentValidation.DependencyInjectionExtensions
Dependenecy injection extensions for FluentValidation
3
FluentValidation.DependencyInjectionExtensions
AspNetCore integration for FluentValidation
2
FluentValidation.DependencyInjectionExtensions
Dependenecy injection extensions for FluentValidation
2
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
1
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
1

Changes in 7.4: * Improved syntax for DependentRules * ValidationException serialization support when running on full framework * Added ComparisonProperty placeholder to some validators * The Test Helper now correctly handles read-only properties * Add CancellationToken support to ValidateAndThrowAsync and various ValidateAsync overloads * Improved functionality for custom MessageBuilders * Updated AspNetCore integration to MVC version 2.0.2 * Update MVC5 AddToModelState extension not to overwrite existing attempted values * Added SetRulesetForClientsideMessages method for MVC5/AspNetCore as an alternative to using the RulesetForClientSideMessagesAttribute Changes in 7.3: * Major changes to AspNetCore integration including better support for collections and implicit validation (opt-in) * Fix - Updated EnumValidator's Flags support to handle the ~0 value * Fix - TestHelper checking for child validator would respond with the wrong type * Fix - Updated translations for some validators * Fix - Overload of WithName that takes a lambda generated an exception * Added versions of WhenAsync and UnlessAsync that support CancellationTokens * Simplify calls to DependentRules * Add Skip property to CustomizeValidatorAttribute in the ASP.NET Core integration Changes in 7.2: * Updated AspNetCore integration to support IValidatableObject * Updated AspNetCore integration to allow mixing multiple validation strategies in the same model * Updated AspNetCore integration to support RulesetForClientsideMessagesAttribute * Fix - Property names were not generated properly for nested types when using AddFailure inside a Custom validator * Fix - NullReferenceException when using CustomAsync but the validator is invoked synchronously * Fix - Clientside integration in AspNetCore being resolved from the root-level service provider * Fix - Allow empty string to be passed to OverridePropertyName Changes in 7.1.1: * Fix - Incorrect property name was generated when using RuleForEach combined with SetValidator * Fix - Nesting async validators inside DependentRules didn't wait for completion Changes in 7.1: * New RuleFor().Custom() method as a replacement for the old, deprecated Custom method * Improved messages in the ShouldHaveChildValidator test extension * Test helper works with nested properties * Additional overload of WithState allows access to collection item when used with RuleForEach * Fix - Wrong values were generated as part of the MVC5 clientside integration for MinLength and MaxLength validators * Fix - AssemblyScanner now excludes abstract and generic types * Fix - InvalidCastException when using lazy WithMessage combined with RuleForEach * WithState enhanced to allow access to the ValidationContext Changes in 7.0: 7.0 is a major release that contains several breaking changes, especially with Localization. If you use FluentValidation's support for localization please read the updated documentation: https://github.com/JeremySkinner/FluentValidation/wiki/f.-Localization * Localization rewrite to not require satellite assemblies * New 'Custom' rule method replaces the root-level Custom method * Switch to Netstandard based build process * Assemblies are now signed / strongly named - see https://github.com/JeremySkinner/FluentValidation/wiki/l.-Strong-naming-and-signed-packages * Fix - Possible NullReferenceException in the AspNetCore clientside integration for length validators * Fix - Don't clear the ModelValidatorProviders collection by default in the AspNetCore integration (added new ClearValidatorProviders property to control this behaviour) * Fix - Ensure IValidatorFactory is resolved from request scope in asp.net core integration * Fix - Property getter that throws an exception causes validation to fail in WebApi integration * Fix - Issue in AspNetCore integration where we tried to resolve a collection validator in some situations where a class validator should be used * Fix - Incorrect clientside validation attributes generated for email validator and credit card validator in the asp.net core integration * Fix - Child model validation now works in webapi integration * Improve splitting of PascalCased property names to support uppercase character sequences * ValidationResult.ErrorCode property now always returns the type of the PropertyValidator that generated the message, unless it's been explicitly overriden Full release notes can be found at https://github.com/JeremySkinner/FluentValidation/blob/master/Changelog.txt

.NET Framework 4.5

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.NET Standard 1.0

.NET Standard 2.0

  • No dependencies.

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7.6.0 2 2025/8/25
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7.5.2 2 2025/8/25
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7.3.0-beta3 0 2017/12/8
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7.2.0-beta3 0 2017/9/5
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7.1.0-beta1 0 2017/6/24
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6.4.1 2 2025/8/25
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6.4.0-rc1 0 2017/1/30
6.4.0-beta9 0 2016/11/21
6.4.0-beta8 0 2016/10/31
6.4.0-beta7 0 2016/10/28
6.4.0-beta6 0 2016/10/25
6.4.0-beta5 0 2016/10/24
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6.4.0-beta3 0 2016/7/4
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