Valid4net

Manage easyly your models validations in .NET by customizing different properties rules.

How to use

PM> Install-Package Valid4net

> dotnet add package Valid4net

The library contains a class named "Valid4netObject" which your project model has to inherit and access to this base class methods, properties, etc.

1. Model inheritance

 public class Product : Valid4netObject<Product> {
     // TODO
 }

2. Properties definition

 public class Product : Valid4netObject<Product> {
    private string _id;

    public string Id
    {
        get => _id; 
        set
        { 
            SetProperty(ref _id, value); 
        }
    }
 }

Note: The function SetProperty(ref _id, value); will notify property changes to apply rules and is needed for each property which needs validations.

3. Model rules definition

- Using contructor

    ...
    public Product()
    {
        Rules.Add(nameof(Id), "Id cannot be empty!!", p => !string.IsNullOrEmpty(p.Id));
    }
    ...

- Using model instance

    ...
    // Object model
    var product = new Product();

    // Rules definition
    product.AddRule(nameof(product.Id), "Id cannot be empty!!", p => !string.IsNullOrEmpty(p.Id));
    product.AddRule(nameof(product.Title), "Title length must be between 5 and 10!!",p => (p.Title?.Length > 5) && (p.Title?.Length <= 20));
    ...

4. Test if model is valid

  ...
  Product product = new Product();
  bool result = product.HasErrors;
  ...

5. Get errors

  ...
  // Get whole model errors
  product.GetErrors();

  // Get single property errors
  product.GetErrors("Title");
  ...