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
127
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
148
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
166
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
256
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
376
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
1,065
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
130
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
134
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
156
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
169
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
283
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
363
FluentValidation.DependencyInjectionExtensions
Dependenecy injection extensions for FluentValidation
126
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.
155
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.
169
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.
219
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.
347
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.
544

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 14 12/04/2025
12.1.0 94 11/04/2025
12.0.0 295 05/06/2025
12.0.0-preview1 79 01/03/2025
11.12.0 41 11/07/2025
11.11.0 233 11/20/2024
11.10.0 325 09/20/2024
11.9.2 244 06/27/2024
11.9.1 117 07/22/2024
11.9.0 265 02/05/2024
11.8.1 150 07/22/2024
11.8.0 107 07/22/2024
11.7.1 94 07/22/2024
11.7.0 104 07/22/2024
11.6.0 106 07/22/2024
11.5.2 101 07/22/2024
11.5.1 244 02/04/2024
11.5.0 101 07/22/2024
11.4.0 103 07/17/2024
11.3.0 129 02/04/2024
11.2.2 104 07/22/2024
11.2.1 113 07/22/2024
11.2.0 113 07/22/2024
11.1.1 104 07/22/2024
11.1.0 108 07/13/2024
11.0.3 117 07/22/2024
11.0.2 103 07/22/2024
11.0.1 96 07/22/2024
11.0.0 105 07/22/2024
10.4.0 206 02/04/2024
10.3.6 103 07/22/2024
10.3.5 95 07/22/2024
10.3.4 111 07/17/2024
10.3.3 113 07/17/2024
10.3.1 119 07/22/2024
10.3.0 99 05/29/2024
10.2.3 113 07/22/2024
10.2.2 101 07/22/2024
10.2.1 94 07/22/2024
10.2.0 104 07/22/2024
10.1.0 111 07/22/2024
10.0.4 109 07/22/2024
9.5.4 120 07/22/2024
9.5.3 103 07/22/2024
9.5.2 112 07/22/2024
9.5.1 103 07/22/2024
9.5.0 122 02/09/2024
9.4.0 105 07/22/2024
9.3.0 105 07/22/2024
9.3.0-preview3 107 07/22/2024
9.3.0-preview2 106 07/22/2024
9.3.0-preview1 119 07/22/2024
9.2.2 105 07/22/2024
9.2.1 106 07/18/2024
9.2.0 95 07/22/2024
9.1.3 118 07/22/2024
9.1.2 105 07/22/2024
9.1.1 98 07/22/2024
9.1.0 105 07/22/2024
9.0.1 111 07/22/2024
9.0.0-preview5 106 07/22/2024
9.0.0-preview4 98 07/22/2024
9.0.0-preview3 114 07/22/2024
9.0.0-preview2 100 07/22/2024
9.0.0-preview1 105 07/22/2024
8.6.3 110 07/22/2024
8.6.2 94 07/22/2024
8.6.1 103 07/22/2024
8.6.0 105 07/22/2024
8.5.1 109 07/21/2024
8.5.0 108 07/18/2024
8.5.0-preview5 112 07/22/2024
8.5.0-preview4 104 07/22/2024
8.5.0-preview3 100 07/22/2024
8.5.0-preview2 113 07/22/2024
8.5.0-preview1 103 07/22/2024
8.4.0 115 07/22/2024
8.3.0 113 07/22/2024
8.2.3 105 07/22/2024
8.2.2 101 07/22/2024
8.2.1 109 07/22/2024
8.2.0 113 07/22/2024
8.1.3 115 07/22/2024
8.1.2 97 07/22/2024
8.1.1 100 07/22/2024
8.1.0 113 07/22/2024
8.1.0-preview2 102 07/22/2024
8.1.0-preview1 114 07/22/2024
8.0.101 110 07/22/2024
8.0.100 99 07/17/2024
8.0.0 100 07/22/2024
8.0.0-rc1 113 07/22/2024
8.0.0-preview4 101 07/22/2024
8.0.0-preview3 109 07/22/2024
8.0.0-preview2 112 07/22/2024
7.6.105 103 07/22/2024
7.6.104 108 07/22/2024
7.6.103 96 07/22/2024
7.6.102 109 07/22/2024
7.6.101 103 07/22/2024
7.6.100 114 07/22/2024
7.6.0 118 07/22/2024
7.6.0-preview1 108 07/22/2024
7.5.2 105 07/22/2024
7.5.1 96 06/21/2024
7.5.0 112 07/22/2024
7.4.0 105 07/22/2024
7.3.4 100 07/22/2024
7.3.3 106 07/22/2024
7.3.2 104 07/22/2024
7.3.1 106 07/22/2024
7.3.0 102 07/22/2024
7.3.0-beta3 113 07/22/2024
7.3.0-beta2 106 07/22/2024
7.3.0-beta1 116 07/22/2024
7.2.1 111 07/22/2024
7.2.0 109 07/22/2024
7.2.0-beta3 105 07/22/2024
7.2.0-beta2 113 07/22/2024
7.2.0-beta1 110 07/22/2024
7.1.1 102 07/22/2024
7.1.0 96 07/22/2024
7.1.0-beta1 99 07/22/2024
7.0.3 102 07/22/2024
7.0.2 98 07/22/2024
7.0.1 124 07/22/2024
7.0.0 104 07/22/2024
7.0.0-beta3 98 07/22/2024
7.0.0-beta2 102 07/22/2024
7.0.0-beta1 93 07/22/2024
6.4.1 119 07/22/2024
6.4.1-beta1 128 07/22/2024
6.4.0 107 07/22/2024
6.4.0-rc4 129 07/22/2024
6.4.0-rc3 104 07/22/2024
6.4.0-rc2 118 07/22/2024
6.4.0-rc1 116 07/22/2024
6.4.0-beta9 141 07/22/2024
6.4.0-beta8 137 07/22/2024
6.4.0-beta7 109 07/22/2024
6.4.0-beta6 115 07/22/2024
6.4.0-beta5 118 07/22/2024
6.4.0-beta4 115 07/22/2024
6.4.0-beta3 101 07/22/2024
6.4.0-beta2 115 07/22/2024
6.4.0-beta10 125 07/22/2024
6.4.0-beta1 95 07/22/2024
6.3.4-alpha 108 07/22/2024
6.3.3-alpha 99 07/22/2024
6.2.1 104 07/22/2024
6.2.1-beta1 103 07/22/2024
6.2.0 94 07/22/2024
6.2.0-beta1 110 07/22/2024
6.1.0 106 07/22/2024
6.0.2 96 07/22/2024
6.0.1 102 07/22/2024
6.0.0 115 07/22/2024
5.6.2 113 07/22/2024
5.6.1 111 07/22/2024
5.5.0 106 07/22/2024
5.4.0 114 07/22/2024
5.3.0 112 07/21/2024
5.2.0 109 07/22/2024
5.1.0 114 07/22/2024
5.0.0.1 111 07/22/2024
4.0.0.1 114 07/22/2024
4.0.0 116 07/22/2024
3.4.6 101 07/22/2024
3.4.0 100 07/22/2024
3.3.1 110 07/22/2024
3.2.0 123 07/22/2024
3.1.0 107 07/22/2024
3.0.0.1 95 07/22/2024
3.0.0 115 07/22/2024
2.0.0 97 07/22/2024
1.3.0 110 07/22/2024