Controls You Can Use on Web Forms   ASP.NET Standard Controls   HiddenField Control

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To use a HiddenField Web server control, you add it to a page and then add controls and static text to it.

1. Declare an <asp:HiddenField> element on the page. For syntax, see HiddenField Control Syntax.
2. Optionally set the following properties of the HiddenField control to specify how the hiddenfield interacts with its child controls.

Property	Description
HorizontalAlign	Specifies how the child controls are aligned within the hiddenfield ( left, right, center, or justified ).
Wrap	Specifies whether content that is too wide for the hiddenfield is wrapped to the next line or truncated at the hiddenfield’s edge.

3. Optionally set the HiddenField's style attributes to create a distinct appearance for the group of controls within the hiddenfield.

<asp:HiddenField id="myHiddenField" backcolor="wheat" width=300 
   borderstyle="ridge" borderwidth=1 runat="server">

The following example shows how you can dynamically add controls to a HiddenField control at run time.

HiddenField1.aspx Run Sample | View Source

For details about adding controls to a container control such as a HiddenField, see Adding Controls to a Web Forms Page Programmatically.

Introduction to the HiddenField Control