FluentValidation 11.4.0

The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org. Prefix Reserved
.NET 5.0 .NET Standard 2.0 
dotnet add package FluentValidation --version 11.4.0
NuGet\Install-Package FluentValidation -Version 11.4.0
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="11.4.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add FluentValidation --version 11.4.0
#r "nuget: FluentValidation, 11.4.0"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. 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=11.4.0

// Install FluentValidation as a Cake Tool
#tool nuget:?package=FluentValidation&version=11.4.0

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 Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows net7.0 net7.0-android net7.0-ios net7.0-maccatalyst net7.0-macos net7.0-tvos net7.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net461 net462 net463 net47 net471 net472 net48 net481
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

  • .NETStandard 2.0

  • .NETStandard 2.1

    • No dependencies.

  • net5.0

    • No dependencies.

  • net6.0

    • No dependencies.

  • net7.0

    • No dependencies.

NuGet packages (1.5K)

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. The project is aimed at people using .NET running a micro services / service orientated architecture that need a unified point of entry into their system. In particular I want easy integration with IdentityServer reference and bearer tokens. reference tokens. Ocelot is a bunch of middlewares in a specific order. Ocelot manipulates the HttpRequest object into a state specified by its configuration until it reaches a request builder middleware where it creates a HttpRequestMessage object which is used to make a request to a downstream service. The middleware that makes the request is the last thing in the Ocelot pipeline. It does not call the next middleware. The response from the downstream service is stored in a per request scoped repository and retrived as the requests goes back up the Ocelot pipeline. There is a piece of middleware that maps the HttpResponseMessage onto the HttpResponse object and that is returned to the client. That is basically it with a bunch of other features.
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 (156)

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

Repository Stars
aspnetboilerplate/aspnetboilerplate
ASP.NET Boilerplate - Web Application Framework
abpframework/abp
Open Source Web Application Framework for ASP.NET Core
dotnet-architecture/eShopOnWeb
Sample ASP.NET Core 6.0 reference application, powered by Microsoft, demonstrating a layered application architecture with monolithic deployment model. Download the eBook PDF from docs folder.
Sonarr/Sonarr
Smart PVR for newsgroup and bittorrent users.
kgrzybek/modular-monolith-with-ddd
Full Modular Monolith application with Domain-Driven Design approach.
Version Downloads Last updated
11.4.0 1,941,654 11/23/2022
11.3.0 719,407 11/10/2022
11.2.2 3,906,182 9/11/2022
11.2.1 3,899,764 8/28/2022
11.2.0 2,508,156 8/8/2022
11.1.1 130,297 8/6/2022
11.1.0 4,558,953 6/22/2022
11.0.3 1,186,990 6/10/2022
11.0.2 1,745,583 5/27/2022
11.0.1 2,472,222 5/7/2022
11.0.0 1,099,649 4/30/2022
10.4.0 7,795,824 3/11/2022
10.3.6 12,167,657 12/13/2021
10.3.5 1,723,889 11/30/2021
10.3.4 4,997,405 10/22/2021
10.3.3 6,532,067 8/24/2021
10.3.1 468,735 8/19/2021
10.3.0 4,733,752 7/9/2021
10.2.3 4,896,626 6/3/2021
10.2.2 292,234 6/1/2021
10.2.1 790,419 5/30/2021
10.2.0 182,577 5/28/2021
10.1.0 3,311,444 4/28/2021
10.0.4 2,500,414 4/17/2021
9.5.4 2,321,686 4/5/2021
9.5.3 2,797,973 3/15/2021
9.5.2 1,286,626 3/8/2021
9.5.1 4,317,938 2/11/2021
9.5.0 2,069,866 1/31/2021
9.4.0 2,113,893 1/14/2021
9.3.0 9,384,657 11/10/2020
9.3.0-preview3 27,096 10/19/2020
9.3.0-preview2 122,198 9/15/2020
9.3.0-preview1 9,207 8/26/2020
9.2.2 5,094,441 9/20/2020
9.2.1 16,715 9/19/2020
9.2.0 5,633,744 8/26/2020
9.1.3 823,148 8/19/2020
9.1.2 671,367 8/12/2020
9.1.1 520,393 8/8/2020
9.1.0 43,767 8/8/2020
9.0.1 3,543,161 7/14/2020
9.0.0-preview5 73,229 5/23/2020
9.0.0-preview4 115,768 4/22/2020
9.0.0-preview3 151,583 2/29/2020
9.0.0-preview2 27,634 2/21/2020
9.0.0-preview1 75,300 2/8/2020
8.6.3 3,317,981 8/28/2020
8.6.2 19,167,432 2/29/2020
8.6.1 9,072,741 12/28/2019
8.6.0 3,231,527 12/4/2019
8.5.1 3,003,896 11/2/2019
8.5.0 4,300,005 9/24/2019
8.5.0-preview5 57,115 9/1/2019
8.5.0-preview4 80,916 7/23/2019
8.5.0-preview3 26,963 7/10/2019
8.5.0-preview2 55,586 6/13/2019
8.5.0-preview1 48,962 5/10/2019
8.4.0 10,767,045 5/10/2019
8.3.0 2,811,455 4/24/2019
8.2.3 533,048 4/12/2019
8.2.2 758,399 4/5/2019
8.2.1 349,654 4/4/2019
8.2.0 832,523 3/26/2019
8.1.3 4,233,753 1/25/2019
8.1.2 1,894,411 12/18/2018
8.1.1 509,321 12/11/2018
8.1.0 429,698 12/6/2018
8.1.0-preview2 27,026 11/14/2018
8.1.0-preview1 25,859 10/14/2018
8.0.101 650,416 11/24/2018
8.0.100 3,187,959 9/4/2018
8.0.0 812,931 8/16/2018
8.0.0-rc1 46,696 7/24/2018
8.0.0-preview4 22,636 7/16/2018
8.0.0-preview3 21,317 7/13/2018
8.0.0-preview2 21,104 7/13/2018
7.6.105 1,090,615 8/11/2018
7.6.104 2,166,089 7/6/2018
7.6.103 1,033,168 6/16/2018
7.6.102 226,407 6/14/2018
7.6.101 67,538 6/13/2018
7.6.100 150,346 6/7/2018
7.6.0 321,531 6/1/2018
7.6.0-preview1 39,994 4/12/2018
7.5.2 2,894,232 3/16/2018
7.5.1 197,278 3/11/2018
7.5.0 662,545 2/26/2018
7.4.0 1,151,579 1/26/2018
7.3.4 894,048 1/2/2018
7.3.3 163,352 12/22/2017
7.3.2 57,580 12/21/2017
7.3.1 274,099 12/13/2017
7.3.0 55,262 12/13/2017
7.3.0-beta3 25,739 12/8/2017
7.3.0-beta2 40,675 11/20/2017
7.3.0-beta1 22,704 11/11/2017
7.2.1 2,161,614 10/24/2017
7.2.0 690,317 10/5/2017
7.2.0-beta3 38,865 9/5/2017
7.2.0-beta2 24,678 8/22/2017
7.2.0-beta1 21,155 8/19/2017
7.1.1 1,524,808 7/25/2017
7.1.0 451,904 6/28/2017
7.1.0-beta1 20,966 6/24/2017
7.0.3 668,047 6/7/2017
7.0.2 237,127 5/26/2017
7.0.1 62,732 5/23/2017
7.0.0 422,508 5/19/2017
7.0.0-beta3 25,134 5/1/2017
7.0.0-beta2 24,656 4/17/2017
7.0.0-beta1 22,163 4/7/2017
6.4.1 1,172,132 3/15/2017
6.4.1-beta1 21,892 3/13/2017
6.4.0 722,015 3/3/2017
6.4.0-rc4 143,585 2/13/2017
6.4.0-rc3 34,021 2/3/2017
6.4.0-rc2 37,226 1/30/2017
6.4.0-rc1 21,018 1/30/2017
6.4.0-beta9 86,297 11/21/2016
6.4.0-beta8 47,932 10/31/2016
6.4.0-beta7 21,576 10/28/2016
6.4.0-beta6 21,996 10/25/2016
6.4.0-beta5 21,683 10/24/2016
6.4.0-beta4 21,712 10/21/2016
6.4.0-beta3 66,910 7/4/2016
6.4.0-beta2 22,576 7/1/2016
6.4.0-beta10 20,869 1/30/2017
6.4.0-beta1 24,821 6/28/2016
6.3.4-alpha 349,223 6/1/2016
6.3.3-alpha 21,256 5/27/2016
6.2.1 3,456,840 2/26/2016
6.2.1-beta1 25,394 2/24/2016
6.2.0 123,422 2/22/2016
6.2.0-beta1 21,389 2/12/2016
6.1.0 334,413 1/18/2016
6.0.2 99,378 1/5/2016
6.0.1 34,722 1/5/2016
6.0.0 96,065 12/22/2015
5.6.2 1,125,434 5/29/2015
5.6.1 29,373 5/29/2015
5.5.0 899,433 10/31/2014
5.4.0 505,489 7/3/2014
5.3.0 89,926 5/27/2014
5.2.0 63,210 5/21/2014
5.1.0 661,094 3/11/2014
5.0.0.1 329,837 10/24/2013
4.0.0.1 229,375 7/18/2013
4.0.0 96,357 4/29/2013
3.4.6 319,161 8/30/2012
3.4.0 58,237 8/17/2012
3.3.1 57,665 3/30/2012
3.2.0 63,433 11/14/2011
3.1.0 49,551 7/30/2011
3.0.0.1 23,880 7/5/2011
3.0.0 33,808 6/25/2011
2.0.0 53,629 1/9/2011
1.3.0 103,605 1/7/2011

FluentValidation 11 is a major release. Please read the upgrade guide at https://docs.fluentvalidation.net/en/latest/upgrading-to-11.html

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