client-side-validation

Clientside Validation in “Self Validate Model” in ASP.NET-MVC3

由 ε祈祈猫儿з 提交于 2019-11-28 05:09:46
问题 This is a followup question for this one: How does DataAnnotations really work in MVC? There is an example custom validation, and a "Self Validate Model" was mentioned. It is quite interesting, but I don't understand how to write a client side validation for it. Can my model object implement the IClientValidateble interface (or it is for the dataannotation attributes only?), I would like to see an example on how to do it. Edit: To my understanding, the "Self Validate Model" works without

Why do we need server side as well as client side validation for Web applications?

由 只愿长相守 提交于 2019-11-28 03:41:19
问题 Is there any high level reason to have both client side and server side validations for a web application ? 回答1: Because your client side validation may be subverted. For example - on the web, if you are using javascript for validation, it is very easy to either turn javascript off, or change how it works using tools such as FireBug. Event with other client/server methods, it is possible for the data link to be subverted and the "validated" data can be changed on the way to the server (Man In

IValidatableObject in MVC3 - client side validation

由 眉间皱痕 提交于 2019-11-27 07:58:17
With MVC3 you have two new mechanisms for adding custom validation. These are (1) subclass ValidationAttribute or (2) implement IValidatableObject. The ValidationAttribute allows you to add client side validation relatively simply by implementing IClientValidatable (and registering a new adapter and method via jQuery). IValidatableObject is more suited to one-off validation requirements where reuse is not an option. It also results in slighlty simpler code. It would therefore be my choice for a number of scenarios. Unfortunately, I do not see an easy way of implementing client side validation

User input validation, client-side or server-side? [PHP/JS]

由 夙愿已清 提交于 2019-11-27 06:18:04
问题 Is it better to validate user input before it's sent to the server with JS or server side with PHP? Or maybe it's worth doing both just to be on the safe side? I'm creating a site (very simple at the moment) that has a members area/admin area/etc. At the moment i only have user input of Username and Password, in the future there will be more (email, address, etc), but whats the best practice of checking the data? Do i throw a load of 'if...else' statements at it until the user gets it right?

Radio button validation in javascript

由 瘦欲@ 提交于 2019-11-27 02:53:08
问题 Need to validate a radio button input, i.e. when submit button is pressed and no radio buttons have been selected, it alerts the user saying 'please select a check box', and if a radio button has been selected then simply submit the form, needs no alert. Can only use HTML CSS and JavaScript for this, I know it's 1000 times easier in jquery but sadly I can't use that. And I know my HTML isn't valid, but unless it directly affects my current problem then I'll handle it later. <form name="form1"

How to check if user already exists on client-side in ASP.NET MVC 5?

由 China☆狼群 提交于 2019-11-27 02:23:17
问题 Using Visual Studio 2013.4 (Visual Studio 2013 Update 4) I have created a regular ASP.NET MVC 5 project with Individual User Accounts authentication configuration. All the users registration and log-in features has been already scaffolded for me by Visual Studio and works fine. How to implement client-side validation of the following rule on the registration page: There is no already registered user with the same Email ? 回答1: You could use RemoteAttribute to perform client side validation

Why is client-side validation a security risk as opposed to server-side validation?

由 我的梦境 提交于 2019-11-27 02:23:02
问题 I don't quite understand why client side validation is a potential security risk or more of a security risk than server side validation? Can someone give me some scenarios? 回答1: Ideally you'd do both client and server side and never one or the other. If we take at look at these 3 scenarios, both is the only secure, user-friendly way to do it: Client Side Only: As mentioned, it doesn't take much to get around these validations if somebody wants to send malformed data to your server (such as

RegularExpressionAttribute - How to make it not case sensitive for client side validation?

由 南楼画角 提交于 2019-11-26 14:13:14
问题 I have a string that I use for client side validation: private const String regex = @"^(?:\b(?:\d{5}(?:\s*-\s*\d{5})?|([A-Z]{2})\d{3}(?:\s*-\s*\1\d{3})?)(?:,\s*)?)+$"; I use this string in my [RegularExpression(regex, ErrorMessage = "invalid")] attribute. I know that the /i flag for a Javascript regex is used to make it case insensitive, but just tacking it on to the end of my regex (i.e. @"^....$/i" isn't working - the regex validation fails completely, regardless of what is entered (valid

IValidatableObject in MVC3 - client side validation

由 半世苍凉 提交于 2019-11-26 13:56:50
问题 With MVC3 you have two new mechanisms for adding custom validation. These are (1) subclass ValidationAttribute or (2) implement IValidatableObject. The ValidationAttribute allows you to add client side validation relatively simply by implementing IClientValidatable (and registering a new adapter and method via jQuery). IValidatableObject is more suited to one-off validation requirements where reuse is not an option. It also results in slighlty simpler code. It would therefore be my choice for

jQuery Chosen Dropdown validation client site doesn&#39;t work

由 扶醉桌前 提交于 2019-11-26 11:40:32
问题 My model class contains of required lookup value which is a lookup-based record: [Required] [DisplayName(\"Business Unit\")] public string value { get; set; } [Required] //not working on client side? [DisplayName(\"Business Group\")] public int id_businessgroup { get; set; } View: <div class=\"editor-label\"> @Html.LabelFor(model => model.value) </div> <div class=\"editor-field\"> @Html.EditorFor(model => model.value) @Html.ValidationMessageFor(model => model.value) </div> <div class=\"editor
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