MVC :: Validation Using RegularExpressionAttribute?

Jun 24, 2009

I have the following code

[RegularExpression(EmailValidator.Pattern, ErrorMessageResourceName = "Organisation_Email_Invalid", ErrorMessageResourceType = typeof(MyResources))]
public string Email { get; set; }

But the custom error message in the resource file is being ignored. and I get the following message.Email must match the expression ^[a-zA-Z][w.-]*[a-zA-Z0-9]@[a-zA-Z0-9][w.-]*[a-zA-Z0-9].[a-zA-Z][a-zA-Z.]*[a-zA-Z]$.If I set the ErrorMessage in the attribute it works fine but it then cannot use the ResourceFile.The RequiredAttribute Validators are working fine. Is this a known issue or I'm I missing something.


MVC :: Include DisplayName With A RegularExpressionAttribute?

Mar 25, 2011

I got custom attributes to work on the server and client, now I want to DRY things up just a little more. How do you override the pattern for RegularExpressionAttribute to include the DisplayName?

Right now I am like this:


Which results in:


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Serious Error Wrt RegularExpressionAttribute On MVC2 RC1?

Jan 25, 2010

If I decorate my model with a regular expression + localized string resource, and the ErrorMessageResourceName does not resolve to something on the object, the following things happen:

The regular expression is ignored altogether from a validation perspectiveNo error messages are raised in the MVC application.I would love it if the framework floated an exception in this instance because exclusion of this rule could have far reaching implications.The following is a modification to the ChangePasswordModel.NewPassword property in the stock MVC 2 RC1 project that exhibits the behavior. Note that while the MyResources does exist in my project, the EMResourceName does not exist on it.


[RegularExpression(@"^(?=.*d)(?=.*[a-z])(?=.*[A-Z]).{4,8}$", ErrorMessageResourceType = typeof(MyResources), ErrorMessageResourceName = "InvalidPasswordMessage2")]

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MVC :: RegularExpressionAttribute Validator Always Returns False?

Nov 17, 2010

I'm using a model which receives some input from a form and has some validation logic attached via attributes. In one case I'm validating personal names, which should include only letters, apostrophes, spaces and dashes, and be no more than 50 chars long. So I have a model property like:


Everything works fine BUT the RegularExpression attribute: if I add it, I always get a validation error, even when what I type in my form is a valid name (e.g. "Foo"). No matter how I modify the regular expression or what I type, I always get an invalid name error.

(For some reason, I cannot see the regex posted correctly here: it is just ^ followed by the Unicode Letter class and []+ including a Unicode letter class, apostrophe, whitespace and dash, ended by dollar: i.e. start of string - any letter - any of the following: letter, apostrophe, whitespace, dash, 1 or more times; end of string).

What I'm doing wrong here?

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Forms Data Controls :: Javascript Validation For Assigning Validation Group To Validation Summary On Datalist Item Click?

Dec 25, 2010

I am using one datalist control for uploading multiple images.I hv used one Asp:FileUplaod Control and one button in one itemtemplate.I am using reqired field validator and regular expression validator for file upload cntrl I am assigning validation group for both of them on ItemDataBound event of my datalist so that each upload cntrl hv same validaton group as required field and regular expression validator.Now what i want to do is - i want to show my error message in validation summary which is right at the top of the page.I want one know how to write javascript that will assign validation group of my control in datalist on which i click ?

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MVC :: Validation Parameter Names In Unobtrusive Client Validation Rules Must Start With A Lowerc?

Oct 7, 2010

I am migrating my application to MVC3 and getting this error message Validation parameter names in unobtrusive client validation rules must start with a lowercase letter and consist of only lowercase letters or digits.How can I ovoid it without going and modifying all my ViewModels

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How To Extend Server-side Validation Controls To Raise An Event If Validation Fails

Feb 23, 2010

I am using ASP.NET's server-side validation. In the page_load event I'm calling Page.Validate(), and if Page.IsValid is not true I'm then polling the controls to figure out which ones are not valid, and then determining what actions to take.It would be much easier if each control would raise an event as validation fails, allowing me to take action for that particular control. I'm very much a naive programmer when it comes to validation, but is there a way to extend these controls so that a validation error raises an event?

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Forms Data Controls :: GridView With Validation / Apply Validation During Editing?

Apr 29, 2006

During editing imode in gridview control, when uncorrect format was entered and updated , an exception is thrown. can i apply validation during editing?

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Web Forms :: Dropdown Validation Not Working When Add Validation Control In Code Behind

Mar 19, 2010

I am creating dropdown controls in code behind. in some conditions I need to add validation control to dropdowlist. But Validation not firing when I submit button.

If mQuestion.RequiredToAnswer = True Then
Dim mValidator As New RequiredFieldValidator
mValidator.ControlToValidate = mDDL.ID
mValidator.InitialValue = mDDL.Items(0).Text
mValidator.Display = ValidatorDisplay.Dynamic
mValidator.ErrorMessage = "* Required!"
End If

I have other dropdown controls on aspx page with validation comtrols. Those are working fine. Only when I ddl and validations from code not working?

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MVC :: Giving Custom Validation Message (JQuery & XVal Validation)?

Sep 10, 2009

How can I give my own custom validation message in JQuery and XVal Validation.

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MVC :: Register Client-side Validation For Custom Validation Attribute?

May 19, 2010

I am trying to create a custom password validation attribute which has these requirements

1. cannot be empty.

2. doesn't contain space or other special chracters, which I'll define later.

3. length is between 6 - 12


it works fine on the server-side but I'd like to make this work on the client side as well, so I created a PasswordAttributeAdapter class


and in global.asax I added


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Jquery Validation Not Working Throwing Error $.validation Is Undefinedj?

Nov 30, 2010

jQuery validation is working fine on my machine, when i pushed it to test server it won't it's throwing some errors which is kind of surprising.These are the errors I am getting: $.validator is null or not an object...I've never gotten this error before and it throwing an error when I declared a variable like var isValid.I don't know what to do. I am doing the custom validation methods not in the document.ready(). Does this cause this error? I wonder because all jquery validations are passing and hitting the server side validations.

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Web Forms :: How To Disable The Code Behind Validation When Javascript Validation Is Present

Jul 25, 2010

How can I disable the code behind validation when javascript validation is present? Then if there is no javascript enabled then the code behind validation will do its thing. What I notice is that it's reading the code behind valdiation not the javascript.

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Web Forms :: Cascading Dropdown Validation - Required Validation When The Second Ddl Is Visible Only

Dec 4, 2010

i have cascading dropdown ..the second ddl would visible or hide dependg on first ddl value.

i want required validation when the second ddl is visible only..if not visible the no validation should be done.

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Javascript - Perform A Validation To Check Whether A TextBox Value Is Empty On Dropown List Selected Index Change Using Validation Controls?

Jan 19, 2011

I need to perform a validation to check whether a TextBox value is empty on Dropown list selected Index change using validation controls in

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Web Forms :: Validation Summary Change Focus After Validation?

Dec 22, 2009

i have my validation summary shown at the top of the page. i want to set the focus to the summary everytime a error is dispalyed. how can i do so

this is what i have done and has not worked.


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MVC :: Validation Fails And Returns Whole Form With Validation Message?

Mar 18, 2011

Can anyone tell me how to re-display a form when validation fails, i'm having a problem in that when i submit an empty form, the whole ascx file is returned with textbox and button etc.


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MVC :: Custom Validation Attribute Is Not Called By Validation Mechanism?

Aug 28, 2010

Custom Validation Attribute is not called by validation mechanism?




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Validation: Gathering Information From Client-side Validation?

Jan 18, 2011

I'd like to implement ajax message box that will gather information from validators on a page when client-side validation fires. Like: I have left some text fields blank then press submit button and appropriate RequiredFieldValidators show messages. I would like my message box shows those messages too. I am looking for appropriate way to hook on validators JS event or something.

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Is It Possible To Use Validation Controls When I Need To Modify HTML When Validation Fails

Mar 16, 2011

Let's say that I have the following HTML for a text box on an ASP.NET page:

<div class="myClass">
<asp:TextBox ID="txtMyTextBox" runat="server"></asp:TextBox>

It is easy enough to add a required field validator to this page like this.

<asp:RequiredFieldValidator ID="valMyTextBox" runat="server" ControlToValidate="txtMyTextBox" ErrorMessage="My Text Box is required."></asp:RequiredFieldValidator>

But I need to modify the HTML slightly if this text box fails validation. I need to add a CSS class to the DIV. So if the user leaves this field blank I need the HTML to look like this:

<div class="myClass error">
<asp:TextBox ID="txtMyTextBox" runat="server"></asp:TextBox>

Is this possible? I can't figure out if there is a way to write code behind that only fires if this particular validator control fails validation or something. I know I can write code that runs when the entire page is not valid. But I just want this code to run when this validator returns invalid. Hope this makes sense.

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Web Forms :: Validation Control - Finding Syntax For The Validation

Nov 1, 2010

I am using the File upload control in

In that control filter option not available at least i need provide the validation for file upload control

like xml, xsls, txt

give me the syntax for the validation.

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MVC :: Create Client Validation Automatically When Use Own Validation Class?

Mar 2, 2011

I write a class inherited from ValidationAttribute such as

public class MyValidation:ValidationAttribute

but when I use MyValidation,and EnableClientValidation,I found that it would not create client script automatically .

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Web Forms :: Can The Validation Summary Be Used Without Validation Controls

Dec 1, 2009

I have an application where the validation is done via code. Can validation errors be displayed in the Validation Summary even though Validation Controls are not used?

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How To Localize The Validation Messages In JQuery's Validation

Oct 13, 2010

Is there a standard practice for localizing the JQuery Validation messages?

I've been able to hack something together by declaring my own ClassRules and referencing them instead of the default ones.

My code.


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How To Go For Custom Validation Control And When To Do Validation In Javascript

Mar 12, 2010

When to go for custom validation control and when to do validation in javascript? What are pros and cons of each of them?

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MVC :: How To Get Validation Summary For Client Side Validation

Jan 21, 2010

I use the oob client side validation from mvc 2 RC. The input field validation errors are working fine. But the validation summary is missing. How to get the validation summary on client side validation?

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AJAX :: Validation And Client Side Validation?

Sep 8, 2010

When i use Validator callout extender and as well both client side java script validation , both are not working at a same time.I use java script code for dynamic checkboxes to be atleast one checkbox must be checked.When i use onclient click only javascript validations are fired, when use onclick function javascript code is not working.

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Jquery, C#, Server Validation And Validation Blocks?

Feb 1, 2011

Im using the ms validation blocks to validate user input posted using jquery (ajax). Can someone give me an example of the best way to inform the user that the data does not validate.

Do i simply throw an exception and use the error event of the $.ajax function to inform the user of the issues or is there a better way of handling this?

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MVC :: .net Mvc 2.0 Preview 2 Validation - DataAnnotations Validation Not Working?

Nov 1, 2009

I had a mvc 1.0 site. I converted that to mvc 2.0 preview. I couldn't get DataAnnotations validation to work. My model has one single property marked as required. ModelState.IsValid is always true. I tested this feature working on a brand new mvc 2.0 site, but not in converted site! Can I get some pointers on trouble shooting this issue? Where should I start?

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MVC :: Validation Of XML Content - Error "disabling Request Validation The Only Way To Get The Post To Work"

Sep 30, 2010

Is there a way to disable request validation on an action without having to add the line <httpRuntime requestValidationMode="2.0"/> to Web.config? I'm currently posting XML to a controller action and get the "A potentially dangerous Request.Form value..." error. Is disabling request validation the only way to get the post to work, or is there some way I can intercept and encode the value that contains XML between the view and the controller action?

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Javascript - Client Side Validation And Server Side Validation In Java Script And Respectively ?

Sep 6, 2010

want to know that can we validate a control which is out side a form element in side validation)and outside a form element in html(client side validation) let's take a closer look

<input type="text" name="first name"/>

can we apply clien side validation on above text box by java script ?in

<form runat="server">
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

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Forms Data Controls :: Client Side Validation For DetailsView W/o Validation Controls?

Feb 24, 2011

Is it possible to do client side validation on a detailsview (insert or edit) without using validation controls? I.E. somehow capture the onClientClick event of the autogenerated Insert/Update link buttons to call my javascript function?

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Localization :: Compare Validation Control On A Text Control Containing A Uk Date - The Validation Fails?

Mar 6, 2008

I am trying to use en-GB localization, so have the following setup in my web.config in the system.web part...

requestEncoding="utf-8" [code]....

but when I put a compare validation control on a text control containing a uk date (i.e. 28/01/2008), the validation fails telling me it's an invalid date. Is there something else I need to do?

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Web Forms :: Master Page Validation Effects Content Page Validation?

Jul 8, 2010

I have a search control in my master page with the following validation on the search btn's OnClientClick:


Then in the content page I have various controls with validation and a validation summary. I have few custom validators on the content page like below:


which uses the clientvalidationsfunctions which set the validity of the page.Now when I leave the search box in the header blank and I click the submit btn in the content page it posts me back to same (source) page and while debugging I find that the Page.IsValid is false. But if I write something in the search textbox in the master page and the fill the required fields in the content page and click the submit btn in content page it works fine. Why is that so? My validation groups are different on master page and content page.

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How To By-pass Client-side Validation To Verify Server-side Validation

Mar 1, 2011

I'm interested in identifying a means to verify the server-side validation is performing as expected, but need to bypass the client-side validation being done using ASP.NET validation controls. To test this, I've tried using the form Poster add-on to Firefox that allowed me to get/modify the page contents and post it, but the .NET framework interpreted the submission as harmful and threw an application error ("A potentially dangerous Request.Form value was detected from the client").I've created a WinForm that includes a WebBrowser control and I'm able to manipulate the contents of the web page and invoke the button click, but am interested in seeing how to allow a postback with invalid input values. I don't want to assume the server-side validation works (even though I do check if Page.IsValid on the server on postback).This submits the web form in the WebBrowseer control and the expected client-side validation fires:
This is how I've manipulated some of the page contents (this just prevents submission):
mshtml.IHTMLDocument2 doc = extendedWebBrowser1.Document.DomDocument as mshtml.IHTMLDocument2;
string html = doc.body.innerHTML;
html.Replace("Page_ValidationActive = false", "Page_ValidationActive = true");
doc.body.innerHTML = html.ToString();

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JQuery :: Custom Invalid Validation / Using JQuery Plug-in Validation?

Oct 10, 2010

Is there a method in jQuery that I can customize an invalid validation myself instead of using jQuery plug-in validation?

For example, if the form is valid do this below.

if ($('form').valid()) {
//do something

But if I wanted to have a cutomize invalid method I could do this below.

if (!x == y) {
$('form').valid() = False; //[:(]
alert('Form is not valid.');

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Making The Container Of A Validation Summary Visible When The Validation Summary Becomes Visible?

Nov 29, 2010

I have the following markup. The errorPanel was first only used to show server side exception messages, and works fine like that. Now I'd like to incorporate my validation summary into that same errorPanel.


My problem now is that the required validation happens client side, and I want to keep that, so I have no server side opportunity to make errorPanel visible, in order to make the validation summary visible.

I see I have two options: Do validation server side, and use my code there to make the panel visible, or hook into the client side code somehow and catch an event there when the summary should be made visible, and then also make the errorPanel visible. How could I go about the latter?

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Validation With .NET 4.0 And MVC 2?

Apr 26, 2010

I receive the following error when I try to access a page link that says http://localhost:4199/Movie/Hide_%26_Seek. How do I resolve this issue. A potentially dangerous Request.Path value was detected from the client (&).here are the details of the sample code.I have a main page that lists movies from the database. The name I receive from DB is "Hide & Seek"

in Movies.aspx the movie names are listed as below


with above code it displays the name correctly as "Hide & Seek", but the link generated reads as "Hide_%26_Seek".

First, the link is always shows %26 and not "&".

Second, Upon clicking the link it shows the following error.

"A potentially dangerous Request.Path value was detected from the client (&)."

as per the msdn docs, I have also tried with the following custom validation code


and added the following line to the web.config


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Modelstate Validation In Mvc 2.0?

Oct 29, 2010

I have implemented customised registratio page by extending the membership provider using profile provider.I successfully registered the user .Now i want to validate the fields of registration page.Built-in Registration page has builtin validation messages.

Bu in my coding i am not passing model to the registration action, instead i am passing properties.So if i Use If(ModelState.IsValid) it is always gives true even i am not filling any fields .but after it throws an exception but not displaying error messages in the page.tell me what i have to do.How i am getting my validation messages.

I saw Account Models class in that for register Model built in validation conditions are there.So i am also writing like that for my properties.


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MVC :: Are There Any Validation Alternatives

Aug 4, 2010

Im looking for some input on a validation problem i have. My demands for validation are:

1. Able to do database checks

2. Error messages are custom and imported from other localized source as stringvariables(NOT resource files).

3. DRY serverside and clientside validation.

As far as ive seen data annotations dont work well under these cirumstances, custom attributes are needed just to be able to output the strings(wonder why this wasnt thought of). This isnt a dealbreaker but as ive tested sofar custom attributes must be added in the global.asax wich i 1. cannot get to work in the CMS im building this on and 2. i dont want to have to edit the global.asax everytime the scripts are implemented. Serverside this solution works fine though. From what ive read IDataErrorInfo should not be used? So havent really checked how to get this rolling with client-side either.

My thought was using custom service layer validation with xval but documentation is very poor to the extent i could find any(couldnt find any real nfo on how to implement xval with your own code, ie not using the autgened client-side metadata wich leads to the annotation problem described above). So i have a hard time finding any working solution other than to build something 100% custom.

Do anyone have a solution or perhaps some information or can steer me in any direction on the best way to getting this done in a good fashion other than building custom?

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