NuvTools Validation Libraries

A comprehensive validation library for .NET applications, providing robust validation features for Web, Desktop, and Mobile (MAUI) applications. Includes specialized validators for Brazilian documents, password complexity rules, and seamless integration with Blazor and FluentValidation. These libraries target modern .NET platforms, including .NET 8, .NET 9, and .NET 10.

Libraries

NuvTools.Validation

Core validation library with Brazilian document validators, regex patterns, and data annotations.

Key Features:

Brazilian Document Validators: CPF, CNPJ, mobile phone, and ZIP code (CEP) validation
General Validators: Email, numeric types (int, long, decimal), Base64/Data URI validation
Data Annotations: CPF/CNPJ attributes, password complexity attributes
Formatting Utilities: CPF and CNPJ formatting helpers

NuvTools.Validation.AspNetCore.Blazor

Blazor integration for FluentValidation with EditContext and ValidationMessageStore support.

Key Features:

FluentValidation Integration: Bridges FluentValidation with Blazor's EditContext
Auto-Validation: Automatic validation on form submission and field change
Nested Properties: Support for nested property path validation
Field Highlighting: Configurable invalid field highlighting via ValidationMessageStore

Installation

Install via NuGet Package Manager:

# For core validation features
dotnet add package NuvTools.Validation

# For Blazor applications with FluentValidation
dotnet add package NuvTools.Validation.AspNetCore.Blazor

Or via Package Manager Console:

Install-Package NuvTools.Validation
Install-Package NuvTools.Validation.AspNetCore.Blazor

Quick Start

Brazilian Document Validation

using NuvTools.Validation.Brazil;

// Validate CPF
string cpf = "123.456.789-01";
bool isValid = cpf.IsCPF();

// Validate CNPJ
string cnpj = "12.345.678/0001-95";
bool isValid = cnpj.IsCNPJ();

// Auto-detect CPF or CNPJ
string document = "12345678901";
bool isValid = document.IsCPForCNPJ();

// Validate mobile phone
string phone = "11987654321";
bool isValid = phone.IsMobileNumber();

// Validate ZIP code (CEP)
string zipCode = "01310-100";
bool isValid = zipCode.IsZipCodeNumber();

Document Formatting

using NuvTools.Validation.Brazil;

// Format CPF
string cpf = "12345678901";
string formatted = cpf.FormatCPF(); // Returns "123.456.789-01"

// Format CNPJ
string cnpj = "12345678000195";
string formatted = cnpj.FormatCNPJ(); // Returns "12.345.678/0001-95"

General Validation

using NuvTools.Validation;

// Email validation
string email = "user@example.com";
bool isValid = email.IsEmail();

// Numeric validation
string number = "12345";
bool isInt = number.IsIntNumber();
bool isPositive = number.IsIntNumber(positiveOnly: true);
bool isLong = number.IsLongNumber();

// Decimal validation
string value = "123.45";
bool isDecimal = value.IsDecimalNumber();

Data Annotations

using NuvTools.Validation.Brazil.Annotations;
using NuvTools.Validation.Annotations;

public class UserRegistrationModel
{
    [Required]
    [CPF]
    public string CPF { get; set; }

    [Required]
    [PasswordComplexityCapitalLetters(2)]
    [PasswordComplexityLowerCaseLetters(2)]
    [PasswordComplexityDigits(2)]
    public string Password { get; set; }
}

public class CompanyModel
{
    [Required]
    [CNPJ]
    public string CNPJ { get; set; }
}

// Validate using data annotations
var model = new UserRegistrationModel
{
    CPF = "123.456.789-01",
    Password = "MyPass123"
};

var errors = model.Validate(); // Returns null if valid, or list of error messages

Blazor FluentValidation Integration

@page "/register"
@using NuvTools.Validation.AspNetCore.Blazor
@using FluentValidation

<EditForm Model="@model" OnValidSubmit="HandleSubmit">
    <NuvTools.Validation.AspNetCore.Blazor.FluentValidation TModel="UserModel"
        @ref="fluentValidation"
        Validator="validator"
        Model="model"
        EditContext="editContext" />

    <InputText @bind-Value="model.Name" />
    <ValidationMessage For="() => model.Name" />

    <InputText @bind-Value="model.Address.City" />
    <ValidationMessage For="() => model.Address.City" />

    <button type="submit">Submit</button>
</EditForm>

@code {
    private UserModel model = new();
    private EditContext editContext;
    private UserModelValidator validator = new();
    private FluentValidation<UserModel> fluentValidation;

    protected override void OnInitialized()
    {
        editContext = new EditContext(model);
        fluentValidation = new FluentValidation<UserModel>(
            model,
            validator,
            editContext,
            autoValidationOnRequested: true,
            autoValidationOnFieldChanged: true
        );
    }

    public class UserModel
    {
        public string Name { get; set; }
        public Address Address { get; set; } = new();
    }

    public class Address
    {
        public string City { get; set; }
    }

    public class UserModelValidator : AbstractValidator<UserModel>
    {
        public UserModelValidator()
        {
            RuleFor(x => x.Name).NotEmpty();
            RuleFor(x => x.Address.City).NotEmpty();
        }
    }

    private void HandleSubmit()
    {
        // Form is valid
    }
}

Features

Multi-targeting: Compatible with .NET 8, .NET 9, and .NET 10
Comprehensive documentation: Full XML documentation for IntelliSense
Modular design: Use only what you need
Modern C# features: Uses nullable reference types, implicit usings, and source-generated regex

Building from Source

This project uses the modern .slnx solution format (Visual Studio 2022 v17.11+).

# Clone the repository
git clone https://github.com/nuvtools/nuvtools-validation.git
cd nuvtools-validation

# Build the solution
dotnet build NuvTools.Validation.slnx

# Run tests
dotnet test NuvTools.Validation.slnx

# Create release packages
dotnet build NuvTools.Validation.slnx --configuration Release

Requirements

.NET 8.0 SDK or higher
Visual Studio 2022 (v17.11+) or Visual Studio Code with C# extension
FluentValidation 12.x (for NuvTools.Validation.AspNetCore.Blazor)

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is licensed under the MIT License - see the LICENSE file for details.

NuvTools Validation Libraries

Libraries

NuvTools.Validation

Core validation library with Brazilian document validators, regex patterns, and data annotations.

Key Features:

Brazilian Document Validators: CPF, CNPJ, mobile phone, and ZIP code (CEP) validation
General Validators: Email, numeric types (int, long, decimal), Base64/Data URI validation
Data Annotations: CPF/CNPJ attributes, password complexity attributes
Formatting Utilities: CPF and CNPJ formatting helpers

NuvTools.Validation.AspNetCore.Blazor

Blazor integration for FluentValidation with EditContext and ValidationMessageStore support.

Key Features:

FluentValidation Integration: Bridges FluentValidation with Blazor's EditContext
Auto-Validation: Automatic validation on form submission and field change
Nested Properties: Support for nested property path validation
Field Highlighting: Configurable invalid field highlighting via ValidationMessageStore

Installation

Install via NuGet Package Manager:

# For core validation features
dotnet add package NuvTools.Validation

# For Blazor applications with FluentValidation
dotnet add package NuvTools.Validation.AspNetCore.Blazor

Or via Package Manager Console:

Install-Package NuvTools.Validation
Install-Package NuvTools.Validation.AspNetCore.Blazor

Quick Start

Brazilian Document Validation

using NuvTools.Validation.Brazil;

// Validate CPF
string cpf = "123.456.789-01";
bool isValid = cpf.IsCPF();

// Validate CNPJ
string cnpj = "12.345.678/0001-95";
bool isValid = cnpj.IsCNPJ();

// Auto-detect CPF or CNPJ
string document = "12345678901";
bool isValid = document.IsCPForCNPJ();

// Validate mobile phone
string phone = "11987654321";
bool isValid = phone.IsMobileNumber();

// Validate ZIP code (CEP)
string zipCode = "01310-100";
bool isValid = zipCode.IsZipCodeNumber();

Document Formatting

using NuvTools.Validation.Brazil;

// Format CPF
string cpf = "12345678901";
string formatted = cpf.FormatCPF(); // Returns "123.456.789-01"

// Format CNPJ
string cnpj = "12345678000195";
string formatted = cnpj.FormatCNPJ(); // Returns "12.345.678/0001-95"

General Validation

using NuvTools.Validation;

// Email validation
string email = "user@example.com";
bool isValid = email.IsEmail();

// Numeric validation
string number = "12345";
bool isInt = number.IsIntNumber();
bool isPositive = number.IsIntNumber(positiveOnly: true);
bool isLong = number.IsLongNumber();

// Decimal validation
string value = "123.45";
bool isDecimal = value.IsDecimalNumber();

Data Annotations

using NuvTools.Validation.Brazil.Annotations;
using NuvTools.Validation.Annotations;

public class UserRegistrationModel
{
    [Required]
    [CPF]
    public string CPF { get; set; }

    [Required]
    [PasswordComplexityCapitalLetters(2)]
    [PasswordComplexityLowerCaseLetters(2)]
    [PasswordComplexityDigits(2)]
    public string Password { get; set; }
}

public class CompanyModel
{
    [Required]
    [CNPJ]
    public string CNPJ { get; set; }
}

// Validate using data annotations
var model = new UserRegistrationModel
{
    CPF = "123.456.789-01",
    Password = "MyPass123"
};

var errors = model.Validate(); // Returns null if valid, or list of error messages

Blazor FluentValidation Integration

@page "/register"
@using NuvTools.Validation.AspNetCore.Blazor
@using FluentValidation

<EditForm Model="@model" OnValidSubmit="HandleSubmit">
    <NuvTools.Validation.AspNetCore.Blazor.FluentValidation TModel="UserModel"
        @ref="fluentValidation"
        Validator="validator"
        Model="model"
        EditContext="editContext" />

    <InputText @bind-Value="model.Name" />
    <ValidationMessage For="() => model.Name" />

    <InputText @bind-Value="model.Address.City" />
    <ValidationMessage For="() => model.Address.City" />

    <button type="submit">Submit</button>
</EditForm>

@code {
    private UserModel model = new();
    private EditContext editContext;
    private UserModelValidator validator = new();
    private FluentValidation<UserModel> fluentValidation;

    protected override void OnInitialized()
    {
        editContext = new EditContext(model);
        fluentValidation = new FluentValidation<UserModel>(
            model,
            validator,
            editContext,
            autoValidationOnRequested: true,
            autoValidationOnFieldChanged: true
        );
    }

    public class UserModel
    {
        public string Name { get; set; }
        public Address Address { get; set; } = new();
    }

    public class Address
    {
        public string City { get; set; }
    }

    public class UserModelValidator : AbstractValidator<UserModel>
    {
        public UserModelValidator()
        {
            RuleFor(x => x.Name).NotEmpty();
            RuleFor(x => x.Address.City).NotEmpty();
        }
    }

    private void HandleSubmit()
    {
        // Form is valid
    }
}

Features

Multi-targeting: Compatible with .NET 8, .NET 9, and .NET 10
Comprehensive documentation: Full XML documentation for IntelliSense
Modular design: Use only what you need
Modern C# features: Uses nullable reference types, implicit usings, and source-generated regex

Building from Source

This project uses the modern .slnx solution format (Visual Studio 2022 v17.11+).

# Clone the repository
git clone https://github.com/nuvtools/nuvtools-validation.git
cd nuvtools-validation

# Build the solution
dotnet build NuvTools.Validation.slnx

# Run tests
dotnet test NuvTools.Validation.slnx

# Create release packages
dotnet build NuvTools.Validation.slnx --configuration Release

Requirements

.NET 8.0 SDK or higher
Visual Studio 2022 (v17.11+) or Visual Studio Code with C# extension
FluentValidation 12.x (for NuvTools.Validation.AspNetCore.Blazor)

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is licensed under the MIT License - see the LICENSE file for details.

nuvtools/NuvTools.Validationv10.1.0

Get Started

Readme

NuvTools Validation Libraries

Libraries

NuvTools.Validation

NuvTools.Validation.AspNetCore.Blazor

Installation

Quick Start

Brazilian Document Validation

Document Formatting

General Validation

Data Annotations

Blazor FluentValidation Integration

Features

Building from Source

Requirements

Contributing

License

Links

nuvtools/NuvTools.Validationv10.1.0

Get Started

Readme

NuvTools Validation Libraries

Libraries

NuvTools.Validation

NuvTools.Validation.AspNetCore.Blazor

Installation

Quick Start

Brazilian Document Validation

Document Formatting

General Validation

Data Annotations

Blazor FluentValidation Integration

Features

Building from Source

Requirements

Contributing

License

Links