FluentValidation 8.1.0-preview2

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
119
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
121
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
123
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
141
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
162
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
251
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
354
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
1,056
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
120
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
122
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
130
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
150
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
164
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
268
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
356
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.
161
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.
215
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.
326
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.
539

FluentValidation 8 is a major release. Please read the upgrade notes at https://fluentvalidation.net/upgrading-to-8 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. 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

Version Downloads Last updated
12.1.1 9 12/04/2025
12.1.0 89 11/04/2025
12.0.0 279 05/06/2025
12.0.0-preview1 74 01/03/2025
11.12.0 30 11/07/2025
11.11.0 226 11/20/2024
11.10.0 320 09/20/2024
11.9.2 241 06/27/2024
11.9.1 111 07/22/2024
11.9.0 260 02/05/2024
11.8.1 146 07/22/2024
11.8.0 102 07/22/2024
11.7.1 90 07/22/2024
11.7.0 99 07/22/2024
11.6.0 100 07/22/2024
11.5.2 96 07/22/2024
11.5.1 240 02/04/2024
11.5.0 95 07/22/2024
11.4.0 99 07/17/2024
11.3.0 119 02/04/2024
11.2.2 101 07/22/2024
11.2.1 105 07/22/2024
11.2.0 107 07/22/2024
11.1.1 100 07/22/2024
11.1.0 101 07/13/2024
11.0.3 111 07/22/2024
11.0.2 97 07/22/2024
11.0.1 92 07/22/2024
11.0.0 101 07/22/2024
10.4.0 200 02/04/2024
10.3.6 99 07/22/2024
10.3.5 90 07/22/2024
10.3.4 107 07/17/2024
10.3.3 108 07/17/2024
10.3.1 113 07/22/2024
10.3.0 93 05/29/2024
10.2.3 106 07/22/2024
10.2.2 96 07/22/2024
10.2.1 88 07/22/2024
10.2.0 100 07/22/2024
10.1.0 106 07/22/2024
10.0.4 104 07/22/2024
9.5.4 112 07/22/2024
9.5.3 98 07/22/2024
9.5.2 108 07/22/2024
9.5.1 96 07/22/2024
9.5.0 117 02/09/2024
9.4.0 99 07/22/2024
9.3.0 97 07/22/2024
9.3.0-preview3 102 07/22/2024
9.3.0-preview2 100 07/22/2024
9.3.0-preview1 105 07/22/2024
9.2.2 99 07/22/2024
9.2.1 101 07/18/2024
9.2.0 92 07/22/2024
9.1.3 110 07/22/2024
9.1.2 99 07/22/2024
9.1.1 92 07/22/2024
9.1.0 99 07/22/2024
9.0.1 107 07/22/2024
9.0.0-preview5 101 07/22/2024
9.0.0-preview4 94 07/22/2024
9.0.0-preview3 106 07/22/2024
9.0.0-preview2 95 07/22/2024
9.0.0-preview1 100 07/22/2024
8.6.3 105 07/22/2024
8.6.2 88 07/22/2024
8.6.1 98 07/22/2024
8.6.0 100 07/22/2024
8.5.1 101 07/21/2024
8.5.0 103 07/18/2024
8.5.0-preview5 108 07/22/2024
8.5.0-preview4 98 07/22/2024
8.5.0-preview3 93 07/22/2024
8.5.0-preview2 108 07/22/2024
8.5.0-preview1 97 07/22/2024
8.4.0 103 07/22/2024
8.3.0 107 07/22/2024
8.2.3 98 07/22/2024
8.2.2 95 07/22/2024
8.2.1 101 07/22/2024
8.2.0 107 07/22/2024
8.1.3 107 07/22/2024
8.1.2 89 07/22/2024
8.1.1 89 07/22/2024
8.1.0 106 07/22/2024
8.1.0-preview2 95 07/22/2024
8.1.0-preview1 108 07/22/2024
8.0.101 106 07/22/2024
8.0.100 95 07/17/2024
8.0.0 94 07/22/2024
8.0.0-rc1 109 07/22/2024
8.0.0-preview4 95 07/22/2024
8.0.0-preview3 100 07/22/2024
8.0.0-preview2 106 07/22/2024
7.6.105 98 07/22/2024
7.6.104 101 07/22/2024
7.6.103 90 07/22/2024
7.6.102 104 07/22/2024
7.6.101 96 07/22/2024
7.6.100 108 07/22/2024
7.6.0 110 07/22/2024
7.6.0-preview1 103 07/22/2024
7.5.2 98 07/22/2024
7.5.1 87 06/21/2024
7.5.0 107 07/22/2024
7.4.0 94 07/22/2024
7.3.4 93 07/22/2024
7.3.3 98 07/22/2024
7.3.2 94 07/22/2024
7.3.1 95 07/22/2024
7.3.0 97 07/22/2024
7.3.0-beta3 109 07/22/2024
7.3.0-beta2 102 07/22/2024
7.3.0-beta1 110 07/22/2024
7.2.1 102 07/22/2024
7.2.0 103 07/22/2024
7.2.0-beta3 97 07/22/2024
7.2.0-beta2 109 07/22/2024
7.2.0-beta1 102 07/22/2024
7.1.1 95 07/22/2024
7.1.0 92 07/22/2024
7.1.0-beta1 92 07/22/2024
7.0.3 98 07/22/2024
7.0.2 94 07/22/2024
7.0.1 118 07/22/2024
7.0.0 100 07/22/2024
7.0.0-beta3 91 07/22/2024
7.0.0-beta2 96 07/22/2024
7.0.0-beta1 87 07/22/2024
6.4.1 112 07/22/2024
6.4.1-beta1 122 07/22/2024
6.4.0 101 07/22/2024
6.4.0-rc4 122 07/22/2024
6.4.0-rc3 97 07/22/2024
6.4.0-rc2 108 07/22/2024
6.4.0-rc1 109 07/22/2024
6.4.0-beta9 136 07/22/2024
6.4.0-beta8 131 07/22/2024
6.4.0-beta7 105 07/22/2024
6.4.0-beta6 109 07/22/2024
6.4.0-beta5 108 07/22/2024
6.4.0-beta4 111 07/22/2024
6.4.0-beta3 92 07/22/2024
6.4.0-beta2 111 07/22/2024
6.4.0-beta10 118 07/22/2024
6.4.0-beta1 88 07/22/2024
6.3.4-alpha 101 07/22/2024
6.3.3-alpha 96 07/22/2024
6.2.1 101 07/22/2024
6.2.1-beta1 93 07/22/2024
6.2.0 87 07/22/2024
6.2.0-beta1 105 07/22/2024
6.1.0 100 07/22/2024
6.0.2 90 07/22/2024
6.0.1 95 07/22/2024
6.0.0 106 07/22/2024
5.6.2 108 07/22/2024
5.6.1 102 07/22/2024
5.5.0 101 07/22/2024
5.4.0 110 07/22/2024
5.3.0 106 07/21/2024
5.2.0 104 07/22/2024
5.1.0 109 07/22/2024
5.0.0.1 103 07/22/2024
4.0.0.1 110 07/22/2024
4.0.0 110 07/22/2024
3.4.6 97 07/22/2024
3.4.0 95 07/22/2024
3.3.1 103 07/22/2024
3.2.0 117 07/22/2024
3.1.0 103 07/22/2024
3.0.0.1 89 07/22/2024
3.0.0 108 07/22/2024
2.0.0 90 07/22/2024
1.3.0 106 07/22/2024