Complex model validation for server and client made easy.
Write complex model validation rules in C# once. Dryv will generate JavaScript for client-side validation.
Features
- Automatically translates validation expressions from C# to JavaScript.
- Supports asynchronous validation expressions.
- Supports dependency-injection into validation expressions (e.g. for ASP.NET options).
- Automatically generates ASP.NET controllers at runtime for custom async validation rules.
- Integrates into the ASP.NET model validation.
Installation
.NET Standard 1.2
Install-Package Dryv
ASP.NET Core 3.1
Install-Package Dryv.AspNetCore
Usage
.NET Standard 1.2
using Dryv.Rules;
public class Address
{
private static DryvRules<Address> ValidationRules = DryvRules.For<Address>()
.Rule(a => a.City, a => string.IsNullOrWhiteSpace(a.City) ? "Please enter a city." : null)
.Rule(a => a.ZipCode, a => string.IsNullOrWhiteSpace(a.ZipCode) ? "Please enter a ZIP code." : null)
.Rule(a => a.ZipCode, a => a.ZipCode.Trim().Length < 5 ? "ZIP code must have at least 5 characters." : null)
.Rule<AsyncValidator, SampleOptions>(a => a.ZipCode, (a, v, o) => v.ValidateZipCode(a.ZipCode, a.City, o.Strict));
[DryvRules]
public string City { get; set; }
[DryvRules]
public string ZipCode { get; set; }
}
public class HomeModel
{
public Address BillingAddress { get; set; }
public Address ShippingAddress { get; set; }
public Person Person { get; set; }
}using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Dryv.Compilation;
using Dryv.Configuration;
using Dryv.RuleDetection;
using Dryv.Validation;
using Dryv.SampleConsole.Models;
internal class Program
{
private static async Task Main()
{
var model = new HomeModel
{
// ..
};
var validator = new DryvValidator();
var errors = await validator.Validate(model, Activator.CreateInstance);
foreach (var error in from e in errors
from m in e.Message
select m.Type + " " + e.Path + ": " + m.Text)
{
Console.WriteLine(error);
}
}
}ASP.NET Core 3.1
using Dryv.AspNetCore;
using Dryv.AspNetCore.DynamicControllers;
using Dryv.Configuration;
using Dryv.Validation;
using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
public class Startup
{
public void Configure(IApplicationBuilder app)
{
// ..
app.UseDryv();
// ..
}
public void ConfigureServices(IServiceCollection services)
{
// ..
services
.AddMvc()
.AddDryv(options => options.UseClientFunctionWriter<DryvAsyncClientValidationFunctionWriter>())
.AddDryvDynamicControllers(options => options.HttpMethod = DryvDynamicControllerMethods.Get)
.AddDryvPreloading();
// ..
}
}@model HomeModel
<!.. some HTML ..>
<script>
window.dryv = window.dryv || {};
window.dryv.validators = @Html.Raw(string.Join(",\n", from val in Html.GetDryvClientValidationFunctions()
select $@"""{val.Key}"": {val.Value}"));
</script>window.dryv.validators = {
validators: "billingAddress.zipCode": function(m, context) {
return [
function(a) {
return (!/\S/.test(a.billingAddress.zipCode || "") ? "Please enter a ZIP code." : null);
},
function(a) {
return ((a.billingAddress.zipCode.trim().length < 5) ? "ZIP code must have at least 5 characters." : null);
},
function(a, v, o) {
return dryv.validateAsync('/validation/DryvDynamic1/ValidateZipCode', 'GET', {
zipCode: a.billingAddress.zipCode,
city: a.billingAddress.city
});
},
].reduce(function(promiseChain, currentTask) {
return promiseChain.then(function(error) {
return error || currentTask(m, context);
});
}, Promise.resolve());
},
// ...
};
