PlaceHolder Web Server Control Overview
The PlaceHolder control lets you place an empty container control in the page and then dynamically add child elements to it at run time.
This topic contains:
Background
Code Examples
Class Reference
Background
The PlaceHolder Web server control lets you place an empty container control within the page and then dynamically add, remove, or loop through child elements at run time. The control renders only its child elements; it renders no markup of its own.
For example, you might want to have a variable number of buttons appear on a Web page, depending on options selected by users. That way, users are not confronted with potentially confusing choices that are either unavailable or not relevant to their individual needs. You can create the buttons dynamically and then add them as children of a PlaceHolder control.
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Code Examples
How to: Add PlaceHolder Web Server Controls to a Web Forms Page
How to: Add Controls to an ASP.NET Web Page Programmatically
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Class Reference
The following table lists the classes that relate to the PlaceHolder control.
Member |
Description |
|---|---|
The main class for the control. |
|
The class that works with the parser to build a PlaceHolder control. To create a custom control builder for a PlaceHolder-derived control, you to inherit from this class. |
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