FluentValidation 9.0.0-preview3

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.AspNetCore
AspNetCore integration for FluentValidation
108
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
109
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
129
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
148
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
204
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
278
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
1,032
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
107
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
108
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
117
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
140
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
142
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
210
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
342
FluentValidation.DependencyInjectionExtensions
Dependenecy injection extensions for FluentValidation
108
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
138
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
151
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
202
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
250
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
524

FluentValidation 9 is a major release. Please read the upgrade notes at https://docs.fluentvalidation.net/en/latest/upgrading-to-9.html Changes in 9.0.0: * Removed support for netstandard1.1 and netstandard1.6 * Default email validation mode now uses the same logic as ASP.NET Core. Previous regex behaviour is opt-in. * TestHelper advanced mode now has more features (see https://docs.fluentvalidation.net/en/latest/testing.html#advanced-test-extensions) * Equal/NotEqual now perform ordinal comparison when used with string properties * Severity can now be set dynamically with a callback * Removed WithLocalizedMessage (WithMessage that takes a callback is the replacement) * Removed ResourceName from ValidationFailure * Removed ResourceName and ResourceType from IStringSource. * Removed SetCollectionValidator which was deprecated in 8.0 * Additional overload of OnAnyFailure that can receive a collection of validation failures * Remove DisplayAttribute integration and reference to DataAnnotations. * ComparisonProperty placeholder is now formatted like PropertyName * Translations of default error messages into other languages are now lazily-loaded * Added Slovenian translations of default error messages. * Added WithMessageArgument to the test helpers. * Add additional overload of SetValidator that takes a Func that receives the current property value. * ASP.NET Core: FluentValidationModelValidatorProvider and FluentValidationModelValidator are now public. * Work around a bug in ASP.NET Core's integration testing components that can cause ConfigureServices to run multiple times. * SourceLink integration. * {CollectionIndex} placeholder can now be accessed in child validators. Full release notes can be found at https://github.com/FluentValidation/FluentValidation/blob/master/Changelog.txt FluentValidation 8 is a major release. Please read the upgrade notes at https://fluentvalidation.net/upgrading-to-8 Changes in 8.6.2: * Ensure CollectionIndex works in async workflow. Changes in 8.6.1: * Added explicit netcoreapp3.1 target to the ASP.NET Core integration. Changes in 8.6.0: * Add support for ASP.NET Core 3.1 * Fixed issue with property indexers being incorrectly stripped out when using test extensions. * AddToModelState no longer includes a dot if PropertyName is null Changes in 8.5.1: * Ensure lazily loaded calls to WithMessage can be used for client-side validation, provided they don't attempt to access model properties from inside the delegate (eg when using IStringLocalizer). * Fix issue where OnFailure didn't work properly when invoked on validators with conditions. Changes in 8.5.0: * Add additional overload of the EmailAddress validator for compatibility with ASP.NET Core's default email validation. * Simplify the advanced testhelper syntax. * Add support for ASP.NET Core 3. * Add support for defining child rules inline. * ValidatorDescriptor now has consistent handling of model-level rules. * RuleForEach can now access collection index in error message with {CollectionIndex} placeholder. * Welsh language translations of default error messages. * Hungrian language translations of default error messages. * Indonesian language translations of default error messages. * Using RuleForEach combined with When is now more intuitive. * Fixed order of rule execution when using async validation. Changes in 8.4.0: * Added simplified version of several messages across all translations to aid with ASP.NET Clientside validation. * New enum validator for string properties. Changes in 8.3.0: * Fix issue in ASP.NET Core integration with GetServiceProvider not working correctly when invoked against a CustomContext/MessageBuilderContext. * Improved how LanguageStringSource works with error-code overrides. * Fix thread-safety issue with use of PropertyValidatorOptions.Empty (now removed). * Improved how calls to When/Unless are handled internally. * DelegatingValidator is now marked as deprecated. * Improvements to Croatian language translations. * Improvements to Georgian language translations. * Resolved subtle bug where top-level WhenAsync wouldn't work correctly when wrapping a top-level call to When. Changes in 8.2.3: * Fix issue in WebApi integration where DataAnnotations validators could generate duplicate messages when in the same project as FluentValidation. Changes in 8.2.2: * Fix FluentValidation.DependencyInjection package name. Changes in 8.2.1: * Resolved issue using InjectValidator with RuleForEach. * Add support for a default IValidatorInterceptor to be registered with the ASP.NET Core Service Provider. Changes in 8.2.0: * Add extensions for injecting child validators using the ASP.NET Core Service Provider. * Implement RuleFor(...).ForEach(...) as an alternative to RuleForEach. * WithLocalizedMessage is deprecated. Use the overload of WithMessage that takes a Func instead. Changes in 8.1.3: * Resolved issue where clientside validation was incorrectly generating metadata for rules with shared conditions. * ScalePrecisionValidator now has a public method in the fluent interface. * Fix placeholder names in ScalePrecisionValidator for consistency. * Updates to Portuguese (Brazil) translations. Changes in 8.1.2: * Fix issue where shared When/Unless conditions didn't execute correctly when used with RuleForEach. Changes in 8.1.1: * Added RuleSetsExecuted property on ValidationResult. * Resolved issue introduced in 8.1 where the shared condition cache does not work correctly with RuleForEach (#970). Changes in 8.1: * Add format support in message placeholders. * Added support for overriding indexers for collection rules. * Allow error codes to be used to override localization key in the Language Manager. * Additional error details are now shown in the ShouldNotHaveValidationErrorFor test extension. * Conditions defined with root-level When/WhenAsync/Unless/UnlessAsync are now only executed once (instead of once for each rule). * Support Otherwise method chained from root-level When/WhenAsync/Unless/UnlessAsync. * Minor wording changes to default English error messages. * Japanese translation of the default error messages. * Added Skip property to MVC5's CustomizeValidatorAttribute for parity with AspNetCore and WebApi. * Remove type constraint on the OverridePropertyName overload that takes an expression. Added Skip property to MVC5's CustomizeValidatorAttribute to bring parity with AspNetCore and WebApi integration. Changes in 8.0: * Support validating only specific properties by path. * Added OnFailure method * Deprecated RuleFor(..).SetCollectionValidator in favour of RuleForEach(...).SetValidator * IStringSource.GetString now takes a validation context instead of a model instance. * Introduce PropertyValidatorOptions in order to clean up the IPropretyValidator interface. * Moved the legacy ValidatorAttribute and AttributedValidatorFactory into a separate FluentValidation.Attributes package. * Remove the pre-7.0 localization mechanism * Remove the pre-7.0 methods for custom validation * Removed many other deprecated methods Full release notes can be found at https://github.com/JeremySkinner/FluentValidation/blob/master/Changelog.txt

.NET Framework 4.6.1

  • No dependencies.

.NET Standard 2.0

  • No dependencies.

Version Downloads Last updated
12.1.0 47 11/04/2025
12.0.0 214 05/06/2025
12.0.0-preview1 59 01/03/2025
11.12.0 11 11/07/2025
11.11.0 212 11/20/2024
11.10.0 303 09/20/2024
11.9.2 226 06/27/2024
11.9.1 99 07/22/2024
11.9.0 250 02/05/2024
11.8.1 131 07/22/2024
11.8.0 91 07/22/2024
11.7.1 82 07/22/2024
11.7.0 87 07/22/2024
11.6.0 90 07/22/2024
11.5.2 85 07/22/2024
11.5.1 230 02/04/2024
11.5.0 86 07/22/2024
11.4.0 85 07/17/2024
11.3.0 106 02/04/2024
11.2.2 90 07/22/2024
11.2.1 93 07/22/2024
11.2.0 96 07/22/2024
11.1.1 87 07/22/2024
11.1.0 91 07/13/2024
11.0.3 102 07/22/2024
11.0.2 85 07/22/2024
11.0.1 81 07/22/2024
11.0.0 91 07/22/2024
10.4.0 188 02/04/2024
10.3.6 86 07/22/2024
10.3.5 81 07/22/2024
10.3.4 94 07/17/2024
10.3.3 97 07/17/2024
10.3.1 96 07/22/2024
10.3.0 80 05/29/2024
10.2.3 95 07/22/2024
10.2.2 82 07/22/2024
10.2.1 78 07/22/2024
10.2.0 87 07/22/2024
10.1.0 93 07/22/2024
10.0.4 93 07/22/2024
9.5.4 100 07/22/2024
9.5.3 89 07/22/2024
9.5.2 95 07/22/2024
9.5.1 85 07/22/2024
9.5.0 101 02/09/2024
9.4.0 88 07/22/2024
9.3.0 86 07/22/2024
9.3.0-preview3 90 07/22/2024
9.3.0-preview2 97 07/22/2024
9.3.0-preview1 91 07/22/2024
9.2.2 87 07/22/2024
9.2.1 87 07/18/2024
9.2.0 80 07/22/2024
9.1.3 95 07/22/2024
9.1.2 85 07/22/2024
9.1.1 81 07/22/2024
9.1.0 86 07/22/2024
9.0.1 96 07/22/2024
9.0.0-preview5 84 07/22/2024
9.0.0-preview4 84 07/22/2024
9.0.0-preview3 95 07/22/2024
9.0.0-preview2 88 07/22/2024
9.0.0-preview1 85 07/22/2024
8.6.3 94 07/22/2024
8.6.2 79 07/22/2024
8.6.1 86 07/22/2024
8.6.0 88 07/22/2024
8.5.1 90 07/21/2024
8.5.0 90 07/18/2024
8.5.0-preview5 96 07/22/2024
8.5.0-preview4 86 07/22/2024
8.5.0-preview3 79 07/22/2024
8.5.0-preview2 96 07/22/2024
8.5.0-preview1 87 07/22/2024
8.4.0 91 07/22/2024
8.3.0 97 07/22/2024
8.2.3 90 07/22/2024
8.2.2 82 07/22/2024
8.2.1 90 07/22/2024
8.2.0 94 07/22/2024
8.1.3 93 07/22/2024
8.1.2 79 07/22/2024
8.1.1 75 07/22/2024
8.1.0 94 07/22/2024
8.1.0-preview2 84 07/22/2024
8.1.0-preview1 100 07/22/2024
8.0.101 92 07/22/2024
8.0.100 86 07/17/2024
8.0.0 86 07/22/2024
8.0.0-rc1 100 07/22/2024
8.0.0-preview4 84 07/22/2024
8.0.0-preview3 85 07/22/2024
8.0.0-preview2 90 07/22/2024
7.6.105 85 07/22/2024
7.6.104 86 07/22/2024
7.6.103 82 07/22/2024
7.6.102 92 07/22/2024
7.6.101 83 07/22/2024
7.6.100 93 07/22/2024
7.6.0 94 07/22/2024
7.6.0-preview1 93 07/22/2024
7.5.2 87 07/22/2024
7.5.1 87 06/21/2024
7.5.0 94 07/22/2024
7.4.0 79 07/22/2024
7.3.4 83 07/22/2024
7.3.3 86 07/22/2024
7.3.2 86 07/22/2024
7.3.1 79 07/22/2024
7.3.0 82 07/22/2024
7.3.0-beta3 97 07/22/2024
7.3.0-beta2 90 07/22/2024
7.3.0-beta1 98 07/22/2024
7.2.1 89 07/22/2024
7.2.0 93 07/22/2024
7.2.0-beta3 86 07/22/2024
7.2.0-beta2 95 07/22/2024
7.2.0-beta1 94 07/22/2024
7.1.1 84 07/22/2024
7.1.0 80 07/22/2024
7.1.0-beta1 84 07/22/2024
7.0.3 86 07/22/2024
7.0.2 85 07/22/2024
7.0.1 102 07/22/2024
7.0.0 81 07/22/2024
7.0.0-beta3 80 07/22/2024
7.0.0-beta2 88 07/22/2024
7.0.0-beta1 73 07/22/2024
6.4.1 105 07/22/2024
6.4.1-beta1 109 07/22/2024
6.4.0 93 07/22/2024
6.4.0-rc4 112 07/22/2024
6.4.0-rc3 84 07/22/2024
6.4.0-rc2 92 07/22/2024
6.4.0-rc1 96 07/22/2024
6.4.0-beta9 121 07/22/2024
6.4.0-beta8 120 07/22/2024
6.4.0-beta7 94 07/22/2024
6.4.0-beta6 98 07/22/2024
6.4.0-beta5 97 07/22/2024
6.4.0-beta4 100 07/22/2024
6.4.0-beta3 84 07/22/2024
6.4.0-beta2 95 07/22/2024
6.4.0-beta10 104 07/22/2024
6.4.0-beta1 78 07/22/2024
6.3.4-alpha 94 07/22/2024
6.3.3-alpha 87 07/22/2024
6.2.1 84 07/22/2024
6.2.1-beta1 86 07/22/2024
6.2.0 79 07/22/2024
6.2.0-beta1 91 07/22/2024
6.1.0 86 07/22/2024
6.0.2 76 07/22/2024
6.0.1 86 07/22/2024
6.0.0 97 07/22/2024
5.6.2 96 07/22/2024
5.6.1 87 07/22/2024
5.5.0 90 07/22/2024
5.4.0 96 07/22/2024
5.3.0 94 07/21/2024
5.2.0 88 07/22/2024
5.1.0 95 07/22/2024
5.0.0.1 89 07/22/2024
4.0.0.1 97 07/22/2024
4.0.0 90 07/22/2024
3.4.6 85 07/22/2024
3.4.0 87 07/22/2024
3.3.1 94 07/22/2024
3.2.0 101 07/22/2024
3.1.0 95 07/22/2024
3.0.0.1 80 07/22/2024
3.0.0 95 07/22/2024
2.0.0 79 07/22/2024
1.3.0 93 07/22/2024