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PublisherChapter 36. The System.Web.UI Namespace
The System.Web.UI namespace
provides types that allow you to create
controls
and Web Forms
(.aspx pages). Many of these types provide
support for controls in the
System.Web.UI.HtmlControls and
System.Web.UI.WebControls namespaces and are not
used directly in your code. Some of these types provide parsing, data
binding, and template functionality. The
System.Web.UI namespace also includes a number of
fundamental classes like Control (the base class
for all HTML, web, and user controls), Page (the
base class for every .aspx Web Forms page you
create), and UserControl (the class representing
all .ascx user controls).Many of the types in this namespace are useful if you want to create
your own custom controls. These types include the
IPostBackDataHandler and
IPostBackEventHandler interfaces (used to access
postback data and raise control events), the
HtmlTextWriter class (used to create a
control's HTML user interface), the
INamingContainer interface (used to create
composite controls), and the ITemplate interface
(used to create templated controls with configurable HTML).
Additionally, the System.Web.UI namespace also
contains types used for control styles
(AttributeCollection and
CssStyleCollection) and view state management
(StateBag and StateItem).Figure 36-1 shows the controls and control builders
for this namespace. Figure 36-2 shows attributes as
well as a delegate and its related event arguments. Figure 36-3 shows the remaining types.
Figure 36-1. Controls and control builders
Figure 36-2. Attributes and other types
Figure 36-3. More types from System.Web.UI
