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
There is a newer version of this package available.
See the version list below for details. 
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 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=11.4.0

// 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 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. 
.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)
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 (1.7K)

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 (173)

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
dotnet-architecture/eShopOnWeb
Sample ASP.NET Core 7.0 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
11.7.1 1,384,270 8/12/2023
11.7.0 25,813 8/11/2023
11.6.0 2,213,652 7/4/2023
11.5.2 6,668,807 4/7/2023
11.5.1 9,175,507 2/20/2023
11.5.0 1,026,073 2/13/2023
11.4.0 9,107,134 11/23/2022
11.3.0 1,760,206 11/10/2022
11.2.2 8,652,957 9/11/2022
11.2.1 12,745,708 8/28/2022
11.2.0 4,711,745 8/8/2022
11.1.1 323,876 8/6/2022
11.1.0 7,869,499 6/22/2022
11.0.3 2,013,967 6/10/2022
11.0.2 2,987,545 5/27/2022
11.0.1 4,128,057 5/7/2022
11.0.0 2,466,754 4/30/2022
10.4.0 12,284,214 3/11/2022
10.3.6 18,071,674 12/13/2021
10.3.5 2,380,243 11/30/2021
10.3.4 6,965,778 10/22/2021
10.3.3 8,825,668 8/24/2021
10.3.1 572,396 8/19/2021
10.3.0 6,102,661 7/9/2021
10.2.3 6,078,686 6/3/2021
10.2.2 348,733 6/1/2021
10.2.1 1,036,377 5/30/2021
10.2.0 258,608 5/28/2021
10.1.0 3,973,416 4/28/2021
10.0.4 3,376,511 4/17/2021
9.5.4 3,352,347 4/5/2021
9.5.3 3,287,224 3/15/2021
9.5.2 1,526,005 3/8/2021
9.5.1 5,343,383 2/11/2021
9.5.0 2,498,115 1/31/2021
9.4.0 2,466,374 1/14/2021
9.3.0 11,093,255 11/10/2020
9.3.0-preview3 30,618 10/19/2020
9.3.0-preview2 132,028 9/15/2020
9.3.0-preview1 10,201 8/26/2020
9.2.2 5,867,916 9/20/2020
9.2.1 20,763 9/19/2020
9.2.0 6,462,869 8/26/2020
9.1.3 913,535 8/19/2020
9.1.2 792,093 8/12/2020
9.1.1 576,367 8/8/2020
9.1.0 87,902 8/8/2020
9.0.1 4,346,618 7/14/2020
9.0.0-preview5 80,069 5/23/2020
9.0.0-preview4 129,767 4/22/2020
9.0.0-preview3 167,113 2/29/2020
9.0.0-preview2 28,856 2/21/2020
9.0.0-preview1 86,150 2/8/2020
8.6.3 4,432,994 8/28/2020
8.6.2 22,189,509 2/29/2020
8.6.1 10,364,037 12/28/2019
8.6.0 3,558,748 12/4/2019
8.5.1 3,287,981 11/2/2019
8.5.0 4,859,813 9/24/2019
8.5.0-preview5 60,356 9/1/2019
8.5.0-preview4 86,037 7/23/2019
8.5.0-preview3 28,332 7/10/2019
8.5.0-preview2 64,319 6/13/2019
8.5.0-preview1 51,940 5/10/2019
8.4.0 11,887,638 5/10/2019
8.3.0 3,357,339 4/24/2019
8.2.3 582,697 4/12/2019
8.2.2 827,169 4/5/2019
8.2.1 384,564 4/4/2019
8.2.0 918,406 3/26/2019
8.1.3 4,535,646 1/25/2019
8.1.2 2,050,576 12/18/2018
8.1.1 532,003 12/11/2018
8.1.0 472,381 12/6/2018
8.1.0-preview2 27,770 11/14/2018
8.1.0-preview1 26,238 10/14/2018
8.0.101 731,234 11/24/2018
8.0.100 3,447,916 9/4/2018
8.0.0 898,834 8/16/2018
8.0.0-rc1 48,953 7/24/2018
8.0.0-preview4 23,256 7/16/2018
8.0.0-preview3 21,858 7/13/2018
8.0.0-preview2 21,660 7/13/2018
7.6.105 1,241,488 8/11/2018
7.6.104 2,348,413 7/6/2018
7.6.103 1,130,738 6/16/2018
7.6.102 253,008 6/14/2018
7.6.101 70,383 6/13/2018
7.6.100 157,378 6/7/2018
7.6.0 347,000 6/1/2018
7.6.0-preview1 42,689 4/12/2018
7.5.2 3,203,671 3/16/2018
7.5.1 221,953 3/11/2018
7.5.0 692,857 2/26/2018
7.4.0 1,334,894 1/26/2018
7.3.4 937,988 1/2/2018
7.3.3 169,445 12/22/2017
7.3.2 64,053 12/21/2017
7.3.1 295,070 12/13/2017
7.3.0 67,895 12/13/2017
7.3.0-beta3 26,227 12/8/2017
7.3.0-beta2 41,881 11/20/2017
7.3.0-beta1 23,133 11/11/2017
7.2.1 2,357,862 10/24/2017
7.2.0 730,895 10/5/2017
7.2.0-beta3 39,390 9/5/2017
7.2.0-beta2 25,262 8/22/2017
7.2.0-beta1 21,612 8/19/2017
7.1.1 1,667,669 7/25/2017
7.1.0 491,141 6/28/2017
7.1.0-beta1 21,409 6/24/2017
7.0.3 700,538 6/7/2017
7.0.2 255,776 5/26/2017
7.0.1 66,032 5/23/2017
7.0.0 491,943 5/19/2017
7.0.0-beta3 25,614 5/1/2017
7.0.0-beta2 25,078 4/17/2017
7.0.0-beta1 22,571 4/7/2017
6.4.1 1,347,017 3/15/2017
6.4.1-beta1 22,191 3/13/2017
6.4.0 783,800 3/3/2017
6.4.0-rc4 144,159 2/13/2017
6.4.0-rc3 35,515 2/3/2017
6.4.0-rc2 37,699 1/30/2017
6.4.0-rc1 21,497 1/30/2017
6.4.0-beta9 87,523 11/21/2016
6.4.0-beta8 48,437 10/31/2016
6.4.0-beta7 22,021 10/28/2016
6.4.0-beta6 22,464 10/25/2016
6.4.0-beta5 22,114 10/24/2016
6.4.0-beta4 22,174 10/21/2016
6.4.0-beta3 67,965 7/4/2016
6.4.0-beta2 23,100 7/1/2016
6.4.0-beta10 21,322 1/30/2017
6.4.0-beta1 25,454 6/28/2016
6.3.4-alpha 369,835 6/1/2016
6.3.3-alpha 21,564 5/27/2016
6.2.1 3,955,820 2/26/2016
6.2.1-beta1 25,882 2/24/2016
6.2.0 139,167 2/22/2016
6.2.0-beta1 21,845 2/12/2016
6.1.0 362,813 1/18/2016
6.0.2 103,666 1/5/2016
6.0.1 35,705 1/5/2016
6.0.0 109,424 12/22/2015
5.6.2 1,242,086 5/29/2015
5.6.1 30,815 5/29/2015
5.5.0 1,007,454 10/31/2014
5.4.0 539,413 7/3/2014
5.3.0 95,174 5/27/2014
5.2.0 67,086 5/21/2014
5.1.0 772,794 3/11/2014
5.0.0.1 391,270 10/24/2013
4.0.0.1 249,528 7/18/2013
4.0.0 99,618 4/29/2013
3.4.6 355,792 8/30/2012
3.4.0 61,452 8/17/2012
3.3.1 67,620 3/30/2012
3.2.0 67,220 11/14/2011
3.1.0 50,574 7/30/2011
3.0.0.1 24,480 7/5/2011
3.0.0 37,087 6/25/2011
2.0.0 60,383 1/9/2011
1.3.0 134,109 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