Using Fluentvalidation to validate entities in ASP.

This article reproduced: http://www.cnblogs.com/libingql/p/3801704.html

1, Fluentvalidation Introduction

Fluentvalidation is a data validation component that differs from the ASP. NET Dataannotataion attribute authentication entity, providing a way to validate the separation of entities from validation. The Fluentvalidation also provides a chain-of-expression syntax.

　　2, Installation Fluentvalidation

Fluentvalidation Address: http://fluentvalidation.codeplex.com/

Install Fluentvalidation and FLUENTVALIDATION.MVC using the management NuGet package for Visual Studio

　　3. Using fluentvalidation verification through modelstate

Project Solution Structure diagram:

　　

Entity class Customer.cs:

Using system;using system.collections.generic;using system.linq;using system.web;namespace libing.portal.web.models.entities{public    class Customer    {public        int CustomerID {get; set;}        public string CustomerName {get; set;}        public string Email {get; set;}        public string Address {get; set;}        public string postcode {get; set;}        public float? Discount {get; set;}        public bool Hasdiscount {get; set;}}    }

Data validation class CustomerValidator.cs:

Using system;using system.collections.generic;using system.linq;using system.web;using FluentValidation;using Libing.portal.web.models.entities;namespace libing.portal.web.models.validators{Public    class customervalidator:abstractvalidator<customer>    {public        customervalidator ()        {            rulefor ( Customer = customer. CustomerName). Notnull (). Withmessage ("Customer name cannot be empty");            Rulefor (customer = customer. Email)                . Notempty (). Withmessage ("Mailbox cannot be empty")                . EmailAddress (). Withmessage ("Incorrect mailbox format");            Rulefor (customer = customer. Discount)                . NotEqual (0)                . When (customer = customer. Hasdiscount);            Rulefor (customer = customer. Address)                . Notempty ()                . Withmessage ("Address cannot be empty")                . Length (a)                . Withmessage ("Address length range is 20-50 bytes");}}}    

Controller class CustomerController.cs:

Using system;using system.collections.generic;using system.linq;using system.web;using System.Web.Mvc;using Fluentvalidation.results;using libing.portal.web.models.entities;using Libing.Portal.Web.Models.Validators; Namespace libing.portal.web.controllers{public class Customercontroller:controller {public ActionResult I        Ndex () {return View ();        } public ActionResult Create () {return View ();  } [HttpPost] public actionresult Create (customer customer) {Customervalidator Validator =            New Customervalidator (); Validationresult result = Validator.            Validate (customer); if (!result. IsValid) {result. Errors.tolist (). ForEach (Error = {modelstate.addmodelerror (error). PropertyName, error.                ErrorMessage);            }); } if (Modelstate.isvalid) {return REDIRECTTOACtion ("Index");        } return View (customer); }    }}

View Page create.cshtml, which is automatically generated when you add a view by selecting the Create Template:

@model libing.portal.web.models.entities.customer@{Layout = null;} <! DOCTYPE html>
Operating effect:
　　
4, by setting the entity class attribute and validation class to verify
To modify an entity class Customer.cs:
Using system;using system.collections.generic;using system.linq;using system.web;using FluentValidation.Attributes; Using Libing.portal.web.models.validators;namespace libing.portal.web.models.entities{    [Validator (typeof ( Customervalidator)] public    class Customer    {public        int CustomerID {get; set;}        public string CustomerName {get; set;}        public string Email {get; set;}        public string Address {get; set;}        public string postcode {get; set;}        public float? Discount {get; set;}        public bool Hasdiscount {get; set;}}    }
Modify Global.asax.cs:
Using system;using system.collections.generic;using system.linq;using system.web;using System.Web.Mvc;using System.web.routing;using fluentvalidation.attributes;using fluentvalidation.mvc;namespace Libing.Portal.Web{    public class MvcApplication:System.Web.HttpApplication    {        protected void Application_Start ()        {            Arearegistration.registerallareas ();            Routeconfig.registerroutes (routetable.routes);            Fluentvalidation Set            Dataannotationsmodelvalidatorprovider.addimplicitrequiredattributeforvaluetypes = False ;            MODELVALIDATORPROVIDERS.PROVIDERS.ADD (New Fluentvalidationmodelvalidatorprovider (New Attributedvalidatorfactory ( )));        }    }}
Using Fluentvalidation to validate entities in ASP.