ASP. NET MVC validation-custom validation rules, validation of 2 attribute values not equal to "pending verification"

Tip: Do not prompt for error messages after saving

Custom validation attributes, inheriting Validationattribute and implementing iclientvalidatable

This time overrides another overload of the base class's IsValid () method, because the overload contains the validation context Validationcontext, from which you can get the properties and property values.

Using system.componentmodel.dataannotations;using system.globalization;using System.web.mvc;namespace mvcvalidation.extension{public class Notequaltoattribute:validationattribute,iclientvalidatable {public S        Tring Otherproperty {get; set;}        Public Notequaltoattribute (String otherproperty) {otherproperty = Otherproperty;            } protected override Validationresult IsValid (object value, Validationcontext validationcontext) {            From the validation context we can get the properties we want var property = ValidationContext.ObjectType.GetProperty (Otherproperty); if (property = = null) {return new Validationresult (string.            Format (CultureInfo.CurrentCulture, "{0} does not exist", otherproperty)); }//Gets the value of the attribute var Othervalue = property.            GetValue (validationcontext.objectinstance, NULL); if (object. Equals (value, Othervalue)) {return new Validationresult (formaterrormessAge (Validationcontext.displayname));        } return null; } Public system.collections.generic.ienumerable<modelclientvalidationrule> Getclientvalidationrules (            Modelmetadata metadata, ControllerContext context) {var rule = new Modelclientvalidationrule {ValidationType = "Notequalto", errormessage = formaterrormessage (metadata.            GetDisplayName ())}; Rule.            Validationparameters["other"] = Otherproperty;        yield return rule; }    }}

View model

[Notequalto ("UserName", errormessage = "cannot be the same as the value of the user name")] is used to compare the value of the property UserName.

 public class Registermodel {[Required] [Stringlength (6, minimumlength = 2)]//Add [Display (Name =  "User name")]//[remote ("Checkusername", "Validate", errormessage = "Remote Authentication user name failed")] [Noinput ("Demo,jack", errormessage        = "Cannot use this name")] public string UserName {get; set;}        [Required]        [DataType (Datatype.emailaddress)]        [Display (Name = "mail")]//[email] public string Email {get; set;}        [Required]        [Stringlength (errormessage = "{0} field min {2} characters, up to {1} words", minimumlength = 6)]        [DataType (Datatype.password)]        [Display (Name = "password")] public string Password {get; set;}        [DataType (Datatype.password)]        [Display (Name = "Confirm password")] [System.ComponentModel.DataAnnotations.Compare ("Password", errormessage = "Password and Confirm password do not match. ")] public string ConfirmPassword {get; Set    } [Notequalto ("UserName", errormessage = "cannot have the same value as the user name")] public string Othername {get; set;} }

Extending the validation of JQuery, JQuery.validator.noteaualto.js

JQuery.validator.addMethod (' Notequalto ', function (value, element, param) { 

    This means that the value of the form can be verified when it is empty

    However, if the form has a value, it must meet | | After the condition, otherwise return false

    Value! = $ (param). Val ();

});

The first parameter is a jquery validation extension method name

The second argument is with rule. validationparameters[key in "other"] corresponds

Option refers to an Modelclientvalidationrule object instance

JQuery.validator.unobtrusive.adapters.add (' Notequalto ', [' other '], function (options) { 

    options.rules[' # ' + options.  Params.other; 

    if (options.message) {

        options.messages[' notequalto '] = options.message;

    }

});   

register.cshtml View

@model mvcvalidation.models.registermodel@{viewbag.title = "register";} 

Effect:

Transferred from: http://www.csharpwin.com/dotnetspace/13573r4911.shtml

ASP. NET MVC validation-custom validation rules, validation of 2 attribute values not equal to "pending verification"