In this topic:

• Introduction

• Declarative Syntax

Introduction

The System.Web.UI.WebControls.HiddenField control is used to store a value that needs to be persisted across posts to the server. It is rendered as an <input type= "hidden"/> element.

Normally view state, session state, and cookies are used to maintain the state of a Web Forms page. However, if these methods are disabled or are not available, you can use the System.Web.UI.WebControls.HiddenField control to store state values.

To specify the value for a System.Web.UI.WebControls.HiddenField control, use the HiddenField.Value property. You can provide a routine that gets called every time the value of the System.Web.UI.WebControls.HiddenField control changes between posts to the server by creating an event handler for the HiddenField.ValueChanged event.

Declarative Syntax

<asp:HiddenField
    EnableTheming="True|