Force validation, even if the user doesn't enter anything, so that fields that are required show an appropriate message.
19 Apr 2012
Jani Giannoudis
Enhanced web page validation based on multiple rules at client and server side.
13 Jun 2012
Rawat Sandeep
Building a Rule Based Validation framework in C# and XML
24 Apr 2013
Colin Angus Mackay
Xander.PasswordValidator is an assembly (or two) that assists in validatating passwords in .NET applications.
What are the most important types of integrity constraints to be checked in any data management app?
How to add reCAPTCHA and email confirmation to your ASP.NET MVC site.
10 Nov 2006
Craig G. Wilson
Provides a basic/advanced object level framework for validation.
Discussing the MultipleFieldsValidator that validates a group of fields in which at least one is required, like phone number, mobile phone number, or email. It inherits the BaseValidator and uses some new cool ASP.NET 2.0 features.
Demistifying the mysterious ASP.NET validator controls, allowing fast and painless validation of Web Forms.
Using JavaScript for oAuth with three major identity providers: Facebook, Google, and Twitter.
Article discussing new version of ASP.NET Credit Card Validator, including both server and client-side checks and VS.NET designer support.
13 Aug 2009
Farooq Kaiser
In this article, I will explore an alternative method of implementing validation logic. I will show you how to perform validation by using the IErrorDataInfo interface.
Learn how to validate complex web forms using a business rules engine
24 Jan 2005
Mauricio Ritter
Override the default implementention of client side validation of ASP.NET and modify the default functionality by adding focus to error fields and individual alerts for each invalid field
13 Jul 2006
Alexander Kleshchevnikov
How flexible is the normal functionality of ASP.NET validators? In this article, I am going to show how to customize the appearance of the attached control of a validator during an error situation on the server or the client side, or even call a custom client function without postback.
15 Dec 2006
Manish Pansiniya
This textbox contains everything for validation. You can set validation options by a click of the mouse and just a few keystrokes.
The article describes an implementation of an ASP.NET validator that uses the new System.ComponentModel.DataAnnotations assembly that came in .NET 3.5 SP1.
Common validation and length validation with Regular Expressions in ASP.NET.
18 Sep 2002
Jamie Nordmeyer
A single control to validate a .NET Web Form.
An ASP.NET Validator Control implemented in Managed C++ that can be used to verify email addresses by connecting to SMTP servers listed as Mail eXchangers for a domain, includes example of Win32 API Interoperability with C++ .NET. The validation is not RegEx based.
13 May 2006
M. Shehabeddeen
This article shows how to defeat the obstacles imposed by the ASP.NET validation system. Client-side control of validation is the main interest of this article, and the solution's core is JavaScript code.
An article describing how to add errors to the validation summary at runtime
This article extends self validating Text Box control to other data types and Min and Max value checking.
An ASP.NET custom TextBox control with a built-in RequiredFieldValidator, providing a similar look and feel to the Windows Forms ErrorProvider.
13 Aug 2002
Wim Hollebrandse
In this article we will have a look at implementing a custom web control. This web control will inherit from the TextBox web control, and will automatically add a required field validator at run-time.
Example of how to require that the user enters at least one of multiple textboxes.
An article describing how to implement a custom ASP.NET validator.
Workaround on using AllowMultiple=true for custom data annotations on both server side and client side.
11 Jun 2002
Scott Juranek
The ValidationSummary Control can be easily subclassed to make data driven web applications more code-friendly.
Validates a ListControl to ensure at least one RadioButton or CheckBox is checked.
How to validate fields in XAML simple and easily
How to work with multiple ValidationGroups simultaneously on client-side.
An article demonstrating creation of a custom ASP.NET validation summary control with highlighting of invalid form fields intelligently.
18 Feb 2010
Somnath Mondal
The benefit of putting validation in the model layer is that, the validation rules will be enforced everywhere in the application that accesses the database. It also means that we can change the validation rule in one place and every UI element inside our app will automatically get updated.
Extendable Javascript validation routines.
Using .NET 3.5 DataAnnotations for ASP.NET input validation.
9 Feb 2004
Anatoly Rapoport
CustomValidator which uses XMLHTTpRequest to make validation.
This article describes the implementation of an ASP.NET Web Service which can be used for SSN format validation.
Use both client-side and server-side validation across multiple checkboxes
Replace the ugly ValidationSummary control text with your own, customizable popup summary window.
5 Mar 2014
Shivprasad koirala
Implementing client-side validation using Validation Application Blocks.
19 Mar 2013
Vasudevan Deepak Kumar
In this article, we would discuss a very brief and overall technique to verify the email addresses of the users that signup for a web account.
12 Oct 2004
Gaurang Desai
RequiredField and Regular Expression validation together... you can use this control in place of group required field and regular expression validation controls.
24 Nov 2005
Tamer Safwat Aziz
This article will teach you how to create your own ASP.NET buttons and image buttons that enable only a set of validators that are attached to these controls on your ASP.NET page.
RequiredField Validator for ASP.NET ListControl derived webserver controls
12 Sep 2006
Muhammad Abubakar Dar
A logical portion of an ASP.NET page can be validated independently by overriding the behavoiur of validator controls. I am going to validate different parts of the page independently so our control or a particular portion of the page will validate itself without affecting anything else on the page.
25 Feb 2007
Three Nine Consulting
Explanation of how to call ASP.NET validation controls by using JavaScript.
Validation controls will not set the focus to the appropriate control when the validation fails. This can be achieved using a custom validation file.
A small program you can use to validate an XML document against a schema
11 Aug 2004
vivekthangaswamy
Validator controls in ASP.NET.
Enhance ASP.NET client-side JavaScript.
This article gives you a solution for generating a client side validation script in a component model that you can reuse in an ASP.NET project.
This article demonstrates serious bugs and security vulnerabilities that can be easily introduced by using the ASP.NET OnChange event for validation.
A JavaScript client-side validation helper.
Very simple XML based framework for client and server side validation frameworks in Java.
C# Controls - Validation Controls
You needn't write any code for control validation; just set a control's validation information at design-time and reduce maintenance workload.
16 Dec 2011
Praveen Meghwal
This article explains how to create custom validation attribute in MVC 3 for validating data on server side as well as on client side.
Code-free validation for TextBox, ComboBox, and more...
An extended control which doesn't require attaching a validation control, but just needs specifying the input type.
Have you ever had a field that was required, but only if another field was a certain value? Then, this validator is for you!
26 Jul 2008
Artiom Chilaru
The article explains how to easily run server-side validation methods on the client-side
30 Oct 2007
Balamurugan R A
Performing validation of checkbox using custom validator
12 Aug 2009
Mahdi Yousefi
Create an ASP.NET captcha that can be used in Web Forms or with AJAX using s3capcha.
Use the ErrorProvider to display friendly 'Value Required' warnings.
An ASP.NET control that allows users to enter only numbers.
Override the WebUIValidation.js function to fire the custom or regular expression validator even when the field is empty.
Discussing the creation of custom Phone TextBox and its built-in PhoneValidator that validates a group of textboxes which represents three sections of a phone number. It inherits the BaseValidator and uses some new cool ASP.NET AJAX 3.5 features.
25 Jul 2005
franksbootdisk
A TextBox class with an extensible validator interface.
Common validation conrol for more than one Required Field on the page. The simple and most eligant way to validate required fields.
Dynamic control validation (TextBox, ComboBox) at runtime using a container control.
Use this validator control to require that at least one control in a list has a value.
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