FluentValidation 11.9.0

The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org. Prefix Reserved
dotnet add package FluentValidation --version 11.9.0
NuGet\Install-Package FluentValidation -Version 11.9.0
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="11.9.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add FluentValidation --version 11.9.0
#r "nuget: FluentValidation, 11.9.0"
#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=11.9.0

// Install FluentValidation as a Cake Tool
#tool nuget:?package=FluentValidation&version=11.9.0

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 is compatible.  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 is compatible.  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

  • .NETStandard 2.1

    • No dependencies.
  • net5.0

    • No dependencies.
  • net6.0

    • No dependencies.
  • net7.0

    • No dependencies.
  • net8.0

    • 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. 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 (191)

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.
aspnetboilerplate/aspnetboilerplate
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
11.9.0 7,196,155 12/21/2023
11.8.1 2,798,675 11/22/2023
11.8.0 3,763,581 10/19/2023
11.7.1 6,481,239 8/12/2023
11.7.0 79,069 8/11/2023
11.6.0 5,092,269 7/4/2023
11.5.2 11,955,114 4/7/2023
11.5.1 20,330,709 2/20/2023
11.5.0 1,576,941 2/13/2023
11.4.0 13,012,186 11/23/2022
11.3.0 2,436,406 11/10/2022
11.2.2 11,495,174 9/11/2022
11.2.1 16,844,988 8/28/2022
11.2.0 5,937,341 8/8/2022
11.1.1 472,015 8/6/2022
11.1.0 9,808,549 6/22/2022
11.0.3 2,620,250 6/10/2022
11.0.2 3,725,818 5/27/2022
11.0.1 5,160,960 5/7/2022
11.0.0 3,546,756 4/30/2022
10.4.0 15,172,784 3/11/2022
10.3.6 21,385,130 12/13/2021
10.3.5 2,702,467 11/30/2021
10.3.4 8,201,325 10/22/2021
10.3.3 9,945,635 8/24/2021
10.3.1 622,730 8/19/2021
10.3.0 6,907,175 7/9/2021
10.2.3 6,891,306 6/3/2021
10.2.2 401,242 6/1/2021
10.2.1 1,170,147 5/30/2021
10.2.0 304,257 5/28/2021
10.1.0 4,448,915 4/28/2021
10.0.4 3,684,134 4/17/2021
9.5.4 4,141,123 4/5/2021
9.5.3 3,591,817 3/15/2021
9.5.2 1,666,123 3/8/2021
9.5.1 5,932,255 2/11/2021
9.5.0 2,763,841 1/31/2021
9.4.0 2,708,015 1/14/2021
9.3.0 12,305,490 11/10/2020
9.3.0-preview3 34,988 10/19/2020
9.3.0-preview2 140,764 9/15/2020
9.3.0-preview1 12,660 8/26/2020
9.2.2 6,378,136 9/20/2020
9.2.1 24,703 9/19/2020
9.2.0 7,042,038 8/26/2020
9.1.3 963,208 8/19/2020
9.1.2 862,108 8/12/2020
9.1.1 619,161 8/8/2020
9.1.0 124,976 8/8/2020
9.0.1 4,821,561 7/14/2020
9.0.0-preview5 85,498 5/23/2020
9.0.0-preview4 136,361 4/22/2020
9.0.0-preview3 183,695 2/29/2020
9.0.0-preview2 31,293 2/21/2020
9.0.0-preview1 91,056 2/8/2020
8.6.3 5,335,669 8/28/2020
8.6.2 24,397,580 2/29/2020
8.6.1 11,232,996 12/28/2019
8.6.0 3,813,384 12/4/2019
8.5.1 3,484,302 11/2/2019
8.5.0 5,344,225 9/24/2019
8.5.0-preview5 65,173 9/1/2019
8.5.0-preview4 90,870 7/23/2019
8.5.0-preview3 30,744 7/10/2019
8.5.0-preview2 71,516 6/13/2019
8.5.0-preview1 55,943 5/10/2019
8.4.0 12,742,357 5/10/2019
8.3.0 3,629,931 4/24/2019
8.2.3 619,825 4/12/2019
8.2.2 926,578 4/5/2019
8.2.1 412,081 4/4/2019
8.2.0 983,994 3/26/2019
8.1.3 4,808,901 1/25/2019
8.1.2 2,168,789 12/18/2018
8.1.1 549,615 12/11/2018
8.1.0 560,834 12/6/2018
8.1.0-preview2 28,997 11/14/2018
8.1.0-preview1 27,389 10/14/2018
8.0.101 779,926 11/24/2018
8.0.100 3,636,133 9/4/2018
8.0.0 988,296 8/16/2018
8.0.0-rc1 51,432 7/24/2018
8.0.0-preview4 25,247 7/16/2018
8.0.0-preview3 23,866 7/13/2018
8.0.0-preview2 23,679 7/13/2018
7.6.105 1,400,141 8/11/2018
7.6.104 2,604,822 7/6/2018
7.6.103 1,197,340 6/16/2018
7.6.102 284,325 6/14/2018
7.6.101 73,616 6/13/2018
7.6.100 163,141 6/7/2018
7.6.0 366,285 6/1/2018
7.6.0-preview1 46,320 4/12/2018
7.5.2 3,521,018 3/16/2018
7.5.1 243,787 3/11/2018
7.5.0 712,083 2/26/2018
7.4.0 1,546,860 1/26/2018
7.3.4 991,888 1/2/2018
7.3.3 178,207 12/22/2017
7.3.2 68,995 12/21/2017
7.3.1 309,365 12/13/2017
7.3.0 81,714 12/13/2017
7.3.0-beta3 27,757 12/8/2017
7.3.0-beta2 44,400 11/20/2017
7.3.0-beta1 24,729 11/11/2017
7.2.1 2,593,824 10/24/2017
7.2.0 769,438 10/5/2017
7.2.0-beta3 40,991 9/5/2017
7.2.0-beta2 26,906 8/22/2017
7.2.0-beta1 23,181 8/19/2017
7.1.1 1,818,326 7/25/2017
7.1.0 525,690 6/28/2017
7.1.0-beta1 22,949 6/24/2017
7.0.3 717,564 6/7/2017
7.0.2 270,401 5/26/2017
7.0.1 76,618 5/23/2017
7.0.0 544,645 5/19/2017
7.0.0-beta3 27,405 5/1/2017
7.0.0-beta2 26,621 4/17/2017
7.0.0-beta1 24,196 4/7/2017
6.4.1 1,529,693 3/15/2017
6.4.1-beta1 23,339 3/13/2017
6.4.0 840,675 3/3/2017
6.4.0-rc4 145,851 2/13/2017
6.4.0-rc3 38,755 2/3/2017
6.4.0-rc2 39,277 1/30/2017
6.4.0-rc1 23,089 1/30/2017
6.4.0-beta9 90,030 11/21/2016
6.4.0-beta8 50,029 10/31/2016
6.4.0-beta7 23,705 10/28/2016
6.4.0-beta6 23,996 10/25/2016
6.4.0-beta5 23,645 10/24/2016
6.4.0-beta4 23,720 10/21/2016
6.4.0-beta3 70,118 7/4/2016
6.4.0-beta2 24,626 7/1/2016
6.4.0-beta10 22,845 1/30/2017
6.4.0-beta1 27,870 6/28/2016
6.3.4-alpha 383,214 6/1/2016
6.3.3-alpha 22,669 5/27/2016
6.2.1 4,633,332 2/26/2016
6.2.1-beta1 28,025 2/24/2016
6.2.0 152,056 2/22/2016
6.2.0-beta1 23,886 2/12/2016
6.1.0 388,129 1/18/2016
6.0.2 109,094 1/5/2016
6.0.1 38,230 1/5/2016
6.0.0 119,120 12/22/2015
5.6.2 1,348,014 5/29/2015
5.6.1 33,362 5/29/2015
5.5.0 1,074,847 10/31/2014
5.4.0 561,476 7/3/2014
5.3.0 99,470 5/27/2014
5.2.0 71,823 5/21/2014
5.1.0 895,367 3/11/2014
5.0.0.1 438,863 10/24/2013
4.0.0.1 269,309 7/18/2013
4.0.0 105,270 4/29/2013
3.4.6 375,619 8/30/2012
3.4.0 63,859 8/17/2012
3.3.1 76,670 3/30/2012
3.2.0 70,311 11/14/2011
3.1.0 51,948 7/30/2011
3.0.0.1 25,740 7/5/2011
3.0.0 40,508 6/25/2011
2.0.0 65,596 1/9/2011
1.3.0 171,329 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