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In MVC 4, in order to enable client side validation in a view, should both keys ClientValidationEnabled and UnobtrusiveJavaScriptEnabled be true in web.config?
WEB.CONFIG
<add key="ClientValidationEnabled" value="true" />
<add key="UnobtrusiveJavaScriptEnabled" value="true" />
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To disable client-side validation, set the page's ClientTarget property to 'Downlevel' ('Uplevel' forces client-side validation). Alternatively, you can set an individual validator control's EnableClientScript property to 'false' to disable client-side validation for that specific control.
Client side validation Vs server side validation The user input validation take place on the Server Side during a post back session is called Server Side Validation and the user input validation take place on the Client Side (web browser) is called Client Side Validation.
It turns out that to enable client side validation without using the HtmlHelpers and a model you just have to add an input with data-val="true" and then data-val- followed by validation method that you want to apply (e.g. data-val-required ), the value of which will be the error message presented to the user (e.g. data ...
Firstly, you just need to create an ASP.NET MVC application. To create a new ASP.NET MVC application, Open Visual Studio choose File, New, then Project. It will open a New Project window, from where you need to choose node Visual C# and then Web and from the right pane you need to choose ASP.NET Web Application.
Can also be through the controller:
//Enable or Disable Client Side Validation at Application Level
HtmlHelper.ClientValidationEnabled = true;
HtmlHelper.UnobtrusiveJavaScriptEnabled = true;
Unobtrusive JavaScript is sort of optional, but since more controls and script libraries are using it I would leave that option enabled as well.
See http://www.asp.net/mvc/tutorials/hands-on-labs/aspnet-mvc-4-helpers,-forms-and-validation
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