TNValidate is now open source

.NET · August 1, 2017 · 1 min read

Our internal validation library TNValidate is now available as a project on GitHub. We released this as open source because we wanted to let others take part in our internal libraries. The library is written in C# and uses a “Fluent Interface” to define the validation rules.

By using TNValidate, we have achieved a uniform way to write our validation logic, which in turn has reduced the number of bugs and made our code more readable.

Using TNValidate is very simple:

// Instantiate validator.
var Validate = new Validator(ValidationLanguageEnum.English);

// Basic validation.
Validate.That(Email, "Email address").IsEmail();

// Chaining a couple of rules.
Validate.That(Name, "Name").IsLongerThan(3).IsShorterThan(100);

// Supply a custom error message.
Validate.That(Age, "Age").IsGreaterThanOrEqual(13, "You must be older than 13 to sign up");

// Check if validation succeeded.
if (Validate.HasErrors())
{
    // Show errors (Validate.ValidatorResults can be data-bound).
    foreach (var Error in Validate.ValidatorResults)
        Console.WriteLine(Error.ValidationMessage);
}
else
{
    // Was fine, continue...
    // ...
}

Head over to GitHub and give it a try!

About Tore

I'm Tore, a Microsoft .NET MVP and independent .NET consultant and trainer based in Sweden. I help development teams sharpen their .NET and ASP.NET Core skills through practical workshops and hands-on coaching, covering everything from C# fundamentals to advanced application architecture. Explore my workshops, presentations and services at tn-data.se and connect on LinkedIn.