FormKit.FluentValidation 1.7.0

.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher. 
dotnet add package FormKit.FluentValidation --version 1.7.0
                    


                    

                
NuGet\Install-Package FormKit.FluentValidation -Version 1.7.0
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="FormKit.FluentValidation" Version="1.7.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="FormKit.FluentValidation" Version="1.7.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="FormKit.FluentValidation" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add FormKit.FluentValidation --version 1.7.0
                    


                    

                
#r "nuget: FormKit.FluentValidation, 1.7.0"
#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. 
#:package FormKit.FluentValidation@1.7.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=FormKit.FluentValidation&version=1.7.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=FormKit.FluentValidation&version=1.7.0
                    


                            Install as a Cake Tool

FormKit

A lightweight, fluent form builder for Blazor that generates accessible EditForm markup, validation wiring, and field components from a strongly-typed model. Renderer-agnostic: the same fluent definition works with plain HTML, MudBlazor, or FluentUI via swappable renderers.

Quickstart

1. Install

dotnet add package FormKit
dotnet add package FormKit.Renderers.Html

2. Register services

builder.Services.AddFormKit()
    .UseHtmlRenderer();

3. Define and render a form

@page "/customers/new"
@using FormKit

<FormKitForm TModel="CustomerVm"
             Definition="@_form"
             Model="@_model"
             OnValidSubmit="HandleSubmit" />

@code {
    private CustomerVm _model = new();

    private readonly FormDefinition<CustomerVm> _form = FormBuilder.For<CustomerVm>()
        .Field(x => x.Name).Required().MaxLength(120)
        .Field(x => x.Email).Required()
        .Field(x => x.IsCompany).Label("Is a company")
        .Field(x => x.CompanyName)
            .When(m => m.IsCompany)
            .Required()
        .Group("Address", g => g
            .Field(x => x.Address.Street).Required()
            .Field(x => x.Address.City).Required()
            .Field(x => x.Address.Country).Select<Country>())
        .Build();

    private Task HandleSubmit(EditContext context) => _service.CreateAsync(_model);
}

Features

  • Fluent API — describe forms from POCO models in a few lines
  • Accessible by default — correct label/for association, aria-required, aria-invalid, aria-describedby, role="alert" error regions
  • Conditional fields — .When(m => m.IsCompany) shows/hides fields based on model state
  • Multi-step forms — .Step("Customer", ...) with per-step validation
  • Field groups — .Group("Address", ...) renders as <fieldset> with <legend>
  • DataAnnotations validation — built-in via EditForm and DataAnnotationsValidator
  • Pluggable renderers — swap UI libraries without rewriting form definitions
  • Trimming & AOT friendly — annotated with IsTrimmable=true

Supported Field Types

Type Auto-detected from HTML input
Text string <input type="text">
Number int, long, short, byte <input type="number">
Decimal decimal, double, float <input type="number" step="any">
Checkbox bool <input type="checkbox">
Date DateOnly <input type="date">
DateTime DateTime, DateTimeOffset <input type="datetime-local">
Time TimeOnly, TimeSpan <input type="time">
Select via .Select<T>() / .Options(...) <select>
RadioGroup via .RadioGroup<T>() / .RadioGroup(...) radio inputs
MultiSelect via .MultiSelect<T>() / .MultiSelect(...) <select multiple>
FileUpload via .File(accept?) <InputFile> (binds IBrowserFile)
Collection via .Collection(x => x.List, item => …) repeating <fieldset> per item + add/remove
MultilineText via .Type(FieldType.MultilineText) <textarea>
Hidden via .Type(FieldType.Hidden) <input type="hidden">

Architecture

Package Purpose
FormKit.Abstractions Interfaces (IFormRenderer, IFieldDescriptor, IValidationAdapter)
FormKit Fluent builder, validation orchestration, FormKitForm component
FormKit.Renderers.Html Plain HTML renderer (zero-dependency, accessible)
FormKit.Renderers.FluentUI Microsoft Fluent UI Blazor renderer (.UseFluentUIRenderer())
FormKit.FluentValidation FluentValidation adapter (FormKitForm.Validator)

A live demo (Blazor WebAssembly, with an HTML/FluentUI renderer toggle) is published to GitHub Pages: https://agriffard.github.io/FormKit/.

License

MIT

Product Compatible and additional computed target framework versions.
.NET net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
1.7.0 36 5/30/2026
1.6.0 34 5/30/2026