FluentValidation 10.4.0

The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org. Prefix Reserved
There is a newer version of this package available.
See the version list below for details.
dotnet add package FluentValidation --version 10.4.0
NuGet\Install-Package FluentValidation -Version 10.4.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="FluentValidation" Version="10.4.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add FluentValidation --version 10.4.0
#r "nuget: FluentValidation, 10.4.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install FluentValidation as a Cake Addin
#addin nuget:?package=FluentValidation&version=10.4.0

// Install FluentValidation as a Cake Tool
#tool nuget:?package=FluentValidation&version=10.4.0

FluentValidation is validation library for .NET that uses a fluent interface and lambda expressions for building strongly-typed validation rules.

Supporting the project

If you use FluentValidation in a commercial project, please sponsor the project financially. FluentValidation is developed and supported by @JeremySkinner for free in his spare time and financial sponsorship helps keep the project going. You can sponsor the project via either GitHub sponsors or OpenCollective.

Example

With FluentValidation, you can define a class that inherits from AbstractValidator which contains the rules for a particular class. The example below shows how you could define rules for a Customer class, and then how to execute the validator.

using FluentValidation;

public class CustomerValidator: AbstractValidator<Customer> {
  public CustomerValidator() {
    RuleFor(x => x.Surname).NotEmpty();
    RuleFor(x => x.Forename).NotEmpty().WithMessage("Please specify a first name");
    RuleFor(x => x.Discount).NotEqual(0).When(x => x.HasDiscount);
    RuleFor(x => x.Address).Length(20, 250);
    RuleFor(x => x.Postcode).Must(BeAValidPostcode).WithMessage("Please specify a valid postcode");
  }

  private bool BeAValidPostcode(string postcode) {
    // custom postcode validating logic goes here
  }
}

var customer = new Customer();
var validator = new CustomerValidator();

// Execute the validator.
ValidationResult results = validator.Validate(customer);

// Inspect any validation failures.
bool success = results.IsValid;
List<ValidationFailure> failures = results.Errors;

Full Documentation

Full documentation can be found at https://docs.fluentvalidation.net

Release Notes and Change Log

Release notes can be found on GitHub.

Product Compatible and additional computed target framework versions.
.NET net5.0 is compatible.  net5.0-windows was computed.  net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 is compatible. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.
  • .NETStandard 2.0

    • No dependencies.
  • .NETStandard 2.1

    • No dependencies.
  • net5.0

    • No dependencies.
  • net6.0

    • No dependencies.

NuGet packages (2.0K)

Showing the top 5 NuGet packages that depend on FluentValidation:

Package Downloads
FluentValidation.DependencyInjectionExtensions The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

Dependency injection extensions for FluentValidation

FluentValidation.AspNetCore The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

AspNetCore integration for FluentValidation

MicroElements.Swashbuckle.FluentValidation The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

Swagger ISchemaFilter that uses FluentValidation validators instead System.ComponentModel based attributes.

Ocelot

Ocelot is an API gateway based on .NET stack.

FluentValidation.WebAPI The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

ASP.NET WebApi integration for FluentValidation

GitHub repositories (197)

Showing the top 5 popular GitHub repositories that depend on FluentValidation:

Repository Stars
abpframework/abp
Open Source Web Application Framework for ASP.NET Core. Offers an opinionated architecture to build enterprise software solutions with best practices on top of the .NET and the ASP.NET Core platforms. Provides the fundamental infrastructure, production-ready startup templates, application modules, UI themes, tooling, guides and documentation.
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ASP.NET Boilerplate - Web Application Framework
kgrzybek/modular-monolith-with-ddd
Full Modular Monolith application with Domain-Driven Design approach.
Sonarr/Sonarr
Smart PVR for newsgroup and bittorrent users.
dotnet-architecture/eShopOnWeb
Sample ASP.NET Core 8.0 reference application, powered by Microsoft, demonstrating a layered application architecture with monolithic deployment model. Download the eBook PDF from docs folder.
Version Downloads Last updated
11.9.2 277,740 6/10/2024
11.9.1 2,537,452 4/23/2024
11.9.0 12,723,042 12/21/2023
11.8.1 3,635,222 11/22/2023
11.8.0 4,767,819 10/19/2023
11.7.1 7,339,948 8/12/2023
11.7.0 92,425 8/11/2023
11.6.0 5,735,060 7/4/2023
11.5.2 13,117,452 4/7/2023
11.5.1 24,718,312 2/20/2023
11.5.0 1,736,923 2/13/2023
11.4.0 14,032,682 11/23/2022
11.3.0 2,628,949 11/10/2022
11.2.2 12,310,764 9/11/2022
11.2.1 17,839,387 8/28/2022
11.2.0 6,290,512 8/8/2022
11.1.1 507,001 8/6/2022
11.1.0 10,343,149 6/22/2022
11.0.3 2,758,595 6/10/2022
11.0.2 3,948,614 5/27/2022
11.0.1 5,422,586 5/7/2022
11.0.0 3,908,246 4/30/2022
10.4.0 15,979,537 3/11/2022
10.3.6 22,315,756 12/13/2021
10.3.5 2,785,768 11/30/2021
10.3.4 8,520,163 10/22/2021
10.3.3 10,240,280 8/24/2021
10.3.1 638,469 8/19/2021
10.3.0 7,160,659 7/9/2021
10.2.3 7,116,547 6/3/2021
10.2.2 410,080 6/1/2021
10.2.1 1,205,264 5/30/2021
10.2.0 316,357 5/28/2021
10.1.0 4,601,717 4/28/2021
10.0.4 3,756,859 4/17/2021
9.5.4 4,386,689 4/5/2021
9.5.3 3,662,855 3/15/2021
9.5.2 1,712,487 3/8/2021
9.5.1 6,090,043 2/11/2021
9.5.0 2,827,602 1/31/2021
9.4.0 2,766,148 1/14/2021
9.3.0 12,635,521 11/10/2020
9.3.0-preview3 35,790 10/19/2020
9.3.0-preview2 142,383 9/15/2020
9.3.0-preview1 12,768 8/26/2020
9.2.2 6,509,883 9/20/2020
9.2.1 25,390 9/19/2020
9.2.0 7,196,687 8/26/2020
9.1.3 972,487 8/19/2020
9.1.2 877,510 8/12/2020
9.1.1 629,101 8/8/2020
9.1.0 137,798 8/8/2020
9.0.1 4,926,042 7/14/2020
9.0.0-preview5 86,316 5/23/2020
9.0.0-preview4 136,726 4/22/2020
9.0.0-preview3 186,645 2/29/2020
9.0.0-preview2 31,407 2/21/2020
9.0.0-preview1 91,990 2/8/2020
8.6.3 5,651,116 8/28/2020
8.6.2 25,049,245 2/29/2020
8.6.1 11,484,119 12/28/2019
8.6.0 3,883,347 12/4/2019
8.5.1 3,539,894 11/2/2019
8.5.0 5,489,581 9/24/2019
8.5.0-preview5 65,836 9/1/2019
8.5.0-preview4 91,877 7/23/2019
8.5.0-preview3 30,856 7/10/2019
8.5.0-preview2 72,720 6/13/2019
8.5.0-preview1 56,719 5/10/2019
8.4.0 12,983,179 5/10/2019
8.3.0 3,692,424 4/24/2019
8.2.3 631,506 4/12/2019
8.2.2 946,379 4/5/2019
8.2.1 425,381 4/4/2019
8.2.0 1,001,398 3/26/2019
8.1.3 4,867,054 1/25/2019
8.1.2 2,200,549 12/18/2018
8.1.1 553,605 12/11/2018
8.1.0 596,720 12/6/2018
8.1.0-preview2 29,044 11/14/2018
8.1.0-preview1 27,456 10/14/2018
8.0.101 794,324 11/24/2018
8.0.100 3,685,309 9/4/2018
8.0.0 1,005,914 8/16/2018
8.0.0-rc1 51,830 7/24/2018
8.0.0-preview4 25,343 7/16/2018
8.0.0-preview3 23,939 7/13/2018
8.0.0-preview2 23,750 7/13/2018
7.6.105 1,452,861 8/11/2018
7.6.104 2,635,940 7/6/2018
7.6.103 1,216,589 6/16/2018
7.6.102 293,294 6/14/2018
7.6.101 74,355 6/13/2018
7.6.100 165,090 6/7/2018
7.6.0 372,822 6/1/2018
7.6.0-preview1 47,015 4/12/2018
7.5.2 3,595,088 3/16/2018
7.5.1 248,915 3/11/2018
7.5.0 717,623 2/26/2018
7.4.0 1,649,516 1/26/2018
7.3.4 1,006,163 1/2/2018
7.3.3 180,194 12/22/2017
7.3.2 69,669 12/21/2017
7.3.1 313,550 12/13/2017
7.3.0 86,043 12/13/2017
7.3.0-beta3 27,815 12/8/2017
7.3.0-beta2 44,752 11/20/2017
7.3.0-beta1 24,771 11/11/2017
7.2.1 2,643,111 10/24/2017
7.2.0 778,028 10/5/2017
7.2.0-beta3 41,096 9/5/2017
7.2.0-beta2 26,969 8/22/2017
7.2.0-beta1 23,236 8/19/2017
7.1.1 1,868,404 7/25/2017
7.1.0 530,880 6/28/2017
7.1.0-beta1 23,017 6/24/2017
7.0.3 722,730 6/7/2017
7.0.2 272,835 5/26/2017
7.0.1 78,235 5/23/2017
7.0.0 569,417 5/19/2017
7.0.0-beta3 27,516 5/1/2017
7.0.0-beta2 26,668 4/17/2017
7.0.0-beta1 24,252 4/7/2017
6.4.1 1,601,334 3/15/2017
6.4.1-beta1 23,380 3/13/2017
6.4.0 857,112 3/3/2017
6.4.0-rc4 145,919 2/13/2017
6.4.0-rc3 38,888 2/3/2017
6.4.0-rc2 39,339 1/30/2017
6.4.0-rc1 23,145 1/30/2017
6.4.0-beta9 90,160 11/21/2016
6.4.0-beta8 50,092 10/31/2016
6.4.0-beta7 23,761 10/28/2016
6.4.0-beta6 24,054 10/25/2016
6.4.0-beta5 23,698 10/24/2016
6.4.0-beta4 23,792 10/21/2016
6.4.0-beta3 70,359 7/4/2016
6.4.0-beta2 24,677 7/1/2016
6.4.0-beta10 22,897 1/30/2017
6.4.0-beta1 27,949 6/28/2016
6.3.4-alpha 392,609 6/1/2016
6.3.3-alpha 22,714 5/27/2016
6.2.1 4,734,223 2/26/2016
6.2.1-beta1 28,099 2/24/2016
6.2.0 155,061 2/22/2016
6.2.0-beta1 23,947 2/12/2016
6.1.0 393,302 1/18/2016
6.0.2 110,228 1/5/2016
6.0.1 38,469 1/5/2016
6.0.0 120,810 12/22/2015
5.6.2 1,379,828 5/29/2015
5.6.1 33,536 5/29/2015
5.5.0 1,096,760 10/31/2014
5.4.0 569,345 7/3/2014
5.3.0 100,398 5/27/2014
5.2.0 72,468 5/21/2014
5.1.0 916,010 3/11/2014
5.0.0.1 455,025 10/24/2013
4.0.0.1 274,748 7/18/2013
4.0.0 107,290 4/29/2013
3.4.6 379,802 8/30/2012
3.4.0 64,357 8/17/2012
3.3.1 79,376 3/30/2012
3.2.0 70,903 11/14/2011
3.1.0 52,108 7/30/2011
3.0.0.1 25,806 7/5/2011
3.0.0 41,332 6/25/2011
2.0.0 67,190 1/9/2011
1.3.0 187,744 1/7/2011

FluentValidation 10 is a major release. Please read the upgrade guide at https://docs.fluentvalidation.net/en/latest/upgrading-to-10.html

Full release notes can be found at https://github.com/FluentValidation/FluentValidation/releases