FluentValidation 9.3.0-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.DependencyInjectionExtensions
AspNetCore integration for FluentValidation
45
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
43
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
44
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
46
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
48
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
3,186
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
9,221
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
11,504
FluentValidation.DependencyInjectionExtensions
Dependenecy injection extensions for FluentValidation
45

FluentValidation 9 is a major release. Please read the upgrade notes at https://docs.fluentvalidation.net/en/latest/upgrading-to-9.html Changes in 9.3.0: * Improvements to LanguageManager's lazy loading of resources. * Deprecate IStringSource and its implementors. Use delegates instead. * CustomizeValidatorAttribute now works in Razor pages (netcore 3.1 and net 5.0 only) * RuleSetForClientSideMessagesAttribute now works in Razor pages (netcore 3.1 and net 5.0 only) Changes in 9.2.2: * Fix one of the inheritance validator overloads not working correctly. Changes in 9.2.1: * Add non-generic Add method to inheritance validator. * Updates to Persian translations. * Added Bengali translations. Changes in 9.2.0: * Add inheritance validator * Performance improvements Changes in 9.1.3: * Fix an issue with IncludeRulesNotInRuleSet not working correctly Changes in 9.1.2: * Make the ValidationContext.ThrowOnFailures getter public. Changes in 9.1.1: * Fix an incorrect deprecation message. Changes in 9.1: * Make ruleset separator character splitting consistent * Transform now works with RuleForEach * Introduce constants for rulesets * Resolve issue when attempting to use asynchronous conditions in a synchornous validaiton run * Added asynchronous versions of the TestHelper methods. * Introduce CascadeMode.Stop and deprecate CascadeMode.StopOnFirstFailure to resolve confusion/abiguity about setting the cascade mode at validator-level (#1437) * RaiseValidationException can be overridden to customize the exception throwing process * Add new Validate extension methods that allow options to be configured using a strategy Changes in 9.0.0: * Removed support for netstandard1.1 and netstandard1.6 * Removed support for end-of-life .NET Core versions (2.2 and 3.0). LTS versions are supported (2.1 and 3.1) * 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 Icelandic 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. * Additional ValidationException constructor that allows using both the default message and a custom one together. * ScalePrecisionValidator algorithm now matches SQL Server. * Additional overload of the When methods that contain the validation context. * Automatically scanned types can be excluded when calling RegisterValidatorsFromAssemblyContaining in ASP.NET Core projects. * New AutomaticValidationEnabled property for use in ASP.NET Core projects (defaults to true). Full release notes can be found at https://github.com/FluentValidation/FluentValidation/blob/master/Changelog.txt

.NET Framework 4.6.1

  • No dependencies.

.NET 5.0

  • No dependencies.

.NET Standard 2.0

  • No dependencies.

Version Downloads Last updated
12.1.1 1 12/08/2025
12.1.0 4 11/05/2025
12.0.0 10 05/05/2025
12.0.0-preview1 15 01/04/2025
11.12.0 5 11/06/2025
11.11.0 20 11/23/2024
11.10.0 25 09/16/2024
11.9.2 30 06/12/2024
11.9.1 30 05/04/2024
11.9.0 29 01/01/2024
11.8.1 33 11/29/2023
11.8.0 29 10/20/2023
11.7.1 32 09/05/2023
11.7.0 33 09/11/2023
11.6.0 53 08/16/2023
11.5.2 32 06/05/2023
11.5.1 32 09/11/2023
11.5.0 53 09/07/2023
11.4.0 31 03/18/2023
11.3.0 3,220 11/15/2022
11.2.2 9,233 09/14/2022
11.2.1 60 09/09/2022
11.2.0 92 08/24/2022
11.1.1 68 08/18/2022
11.1.0 99 09/08/2022
11.0.3 65 09/10/2022
11.0.2 79 08/21/2022
11.0.1 39 08/24/2022
11.0.0 39 09/08/2022
10.4.0 42 08/25/2022
10.3.6 47 07/21/2022
10.3.5 32 09/07/2022
10.3.4 61 06/27/2022
10.3.3 11,490 06/27/2022
10.3.1 49 09/09/2022
10.3.0 69 09/09/2022
10.2.3 65 09/07/2022
10.2.2 57 08/24/2022
10.2.1 38 09/03/2022
10.2.0 71 09/09/2022
10.1.0 36 08/22/2022
10.0.4 60 09/08/2022
9.5.4 60 07/03/2022
9.5.3 60 09/07/2022
9.5.2 57 09/08/2022
9.5.1 35 09/08/2022
9.5.0 59 09/08/2022
9.4.0 64 08/23/2022
9.3.0 98 09/02/2022
9.3.0-preview3 50 09/22/2022
9.3.0-preview2 73 09/21/2022
9.3.0-preview1 63 09/22/2022
9.2.2 85 09/04/2022
9.2.1 42 09/08/2022
9.2.0 60 08/21/2022
9.1.3 62 09/07/2022
9.1.2 41 08/22/2022
9.1.1 37 09/08/2022
9.1.0 40 08/22/2022
9.0.1 36 09/08/2022
9.0.0-preview5 71 10/14/2022
9.0.0-preview4 32 09/21/2022
9.0.0-preview3 44 07/03/2022
9.0.0-preview2 44 10/14/2022
9.0.0-preview1 32 09/26/2022
8.6.3 77 08/20/2022
8.6.2 36 09/02/2022
8.6.1 33 09/09/2022
8.6.0 43 09/08/2022
8.5.1 39 08/25/2022
8.5.0 41 08/25/2022
8.5.0-preview5 48 09/21/2022
8.5.0-preview4 38 09/26/2022
8.5.0-preview3 34 09/21/2022
8.5.0-preview2 37 09/21/2022
8.5.0-preview1 49 06/28/2022
8.4.0 98 09/02/2022
8.3.0 36 09/09/2022
8.2.3 42 08/25/2022
8.2.2 40 08/23/2022
8.2.1 39 09/08/2022
8.2.0 36 09/02/2022
8.1.3 43 09/07/2022
8.1.2 59 09/02/2022
8.1.1 56 09/08/2022
8.1.0 38 09/05/2022
8.1.0-preview2 80 09/22/2022
8.1.0-preview1 44 09/22/2022
8.0.101 84 09/10/2022
8.0.100 43 09/02/2022
8.0.0 43 09/02/2022
8.0.0-rc1 39 09/09/2022
8.0.0-preview4 33 09/22/2022
8.0.0-preview3 41 09/23/2022
8.0.0-preview2 43 10/14/2022
7.6.105 34 09/08/2022
7.6.104 36 09/09/2022
7.6.103 59 08/21/2022
7.6.102 32 09/08/2022
7.6.101 45 09/07/2022
7.6.100 44 09/11/2022
7.6.0 78 08/24/2022
7.6.0-preview1 33 10/14/2022
7.5.2 36 09/08/2022
7.5.1 68 07/13/2022
7.5.0 43 08/21/2022
7.4.0 56 09/07/2022
7.3.4 35 09/07/2022
7.3.3 37 09/07/2022
7.3.2 60 08/21/2022
7.3.1 40 09/07/2022
7.3.0 50 09/02/2022
7.3.0-beta3 39 09/07/2022
7.3.0-beta2 83 06/27/2022
7.3.0-beta1 37 09/03/2022
7.2.1 37 09/07/2022
7.2.0 61 08/31/2022
7.2.0-beta3 38 09/03/2022
7.2.0-beta2 35 09/08/2022
7.2.0-beta1 33 09/03/2022
7.1.1 69 09/08/2022
7.1.0 74 09/02/2022
7.1.0-beta1 30 09/02/2022
7.0.3 64 08/28/2022
7.0.2 34 09/03/2022
7.0.1 37 09/02/2022
7.0.0 60 07/21/2022
7.0.0-beta3 37 09/08/2022
7.0.0-beta2 49 08/23/2022
7.0.0-beta1 33 09/08/2022
6.4.1 36 09/07/2022
6.4.1-beta1 52 09/08/2022
6.4.0 40 09/08/2022
6.4.0-rc4 32 09/08/2022
6.4.0-rc3 65 09/04/2022
6.4.0-rc2 56 09/10/2022
6.4.0-rc1 52 09/02/2022
6.4.0-beta9 54 09/09/2022
6.4.0-beta8 39 09/12/2022
6.4.0-beta7 42 09/08/2022
6.4.0-beta6 56 09/01/2022
6.4.0-beta5 57 09/08/2022
6.4.0-beta4 43 07/18/2022
6.4.0-beta3 56 09/07/2022
6.4.0-beta2 41 08/24/2022
6.4.0-beta10 42 09/09/2022
6.4.0-beta1 34 09/14/2022
6.3.4-alpha 59 09/14/2022
6.3.3-alpha 59 09/10/2022
6.2.1 43 09/09/2022
6.2.1-beta1 49 09/08/2022
6.2.0 61 09/04/2022
6.2.0-beta1 34 09/08/2022
6.1.0 68 09/08/2022
6.0.2 36 09/09/2022
6.0.1 35 09/08/2022
6.0.0 37 09/04/2022
5.6.2 59 08/24/2022
5.6.1 71 09/03/2022
5.5.0 47 08/23/2022
5.4.0 39 09/03/2022
5.3.0 60 09/08/2022
5.2.0 64 09/09/2022
5.1.0 54 08/23/2022
5.0.0.1 38 09/09/2022
4.0.0.1 38 08/24/2022
4.0.0 45 09/02/2022
3.4.6 38 09/02/2022
3.4.0 35 08/23/2022
3.3.1 57 09/02/2022
3.2.0 61 09/07/2022
3.1.0 40 08/24/2022
3.0.0.1 58 09/08/2022
3.0.0 78 08/26/2022
2.0.0 87 08/26/2022
1.3.0 43 09/02/2022