ASP.NET 4.5 has been improved and is the latest version of ASP.NET. It includes an array of new and modified features. Today, we’ll discuss one new feature Unobtrusive Validation that is introduced with ASP.NET 4.5 .
So What is Unobtrusive Validation?
data-* attributes for all these validations.
So now, let's see a normal scenario. I have taken
textbox and applied two ASP.NET validators on it. One is
RangeValidator that allows to enter the value between
1000. Let’s see the aspx code:
Now let's run the application and see the generated the HTML. Now, if you look at the View Source of the page:
Now I have made the same application with Visual Studio 2011 Developer Preview. By default, Unobtrusive Validation is enabled here. So let's see the generated HTML:
Now if you see the above generated HTML, there are few
So let’s see how ASP.NET 4.5 allows to configure the Unobtrusive Validation. There is one new property
UnobtrusiveValidationMode that got added, which can be assigned two values:
UnobtrusiveValidation is set to off
UnobtrusiveValidation is enabled
This property can be configured at three places in the application. These are:
- First, it can be set at application level in config file. We need to add it in the
<add name="ValidationSettings:UnobtrusiveValidationMode" value="WebForms" />
As I discussed, it is by default enabled in ASP.NET. The above key by default added in web.config. So if you want to disable it, then change the above as:
<add name="ValidationSettings:UnobtrusiveValidationMode" value="None" />
- We can also set it at
Application_Start method in Global.asax file as:
void Application_Start(object sender, EventArgs e)
- We can also set it at page level by setting the property of
Page class as:
Page.UnobtrusiveValidationMode = System.Web.UI.UnobtrusiveValidationMode.WebForms;
I hope this post will help a lot to learn ASP.NET 4.5.