ASP.NET 4 Unleashed

Setting the Display Property

All the validation controls include a Display property that determines how the validation error message is rendered. This property accepts any of the following three possible values:

• Static

• Dynamic

• None

By default, the Display property has the value Static. When the Display property has this value, the validation error message rendered by the validation control looks like this:

<span id="reqProductName" style="visibility:hidden;">(Required)</span>

The error message is rendered in a <span> tag that includes a Cascading Style Sheet (CSS) style attribute that sets the visibility of the <span> tag to hidden.

If, on the other hand, you set the Display property to the value Dynamic, the error message is rendered like ...