Appendix C. ASP.NET Controls: Properties and Methods

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Sams Teach Yourself ASP.NET in 21 Days, Second Edition
By Chris Payne
Table of Contents
Week 3.  At a Glance


This appendix covers the properties and methods for every ASP.NET server control, including HTML server controls, Web server controls, and validation controls. Also refer to the .NET Framework SDK Documentation for further reference.

All of the following controls inherit the properties described in Table C.1 from the System.Web.UI.Control class.

Table C.1. Properties of the Control Class Inherited by All Server Controls
Property Description
ClientID The ID generated for the control by ASP.NET.
Controls Returns a ControlCollection object that represents all the child controls for the specified control.
EnableViewState Specifies whether the control should maintain its viewstate and the viewstate of any child controls.
ID Specifies the identifier for the control. This property must be present to enable programmatic control and event handling.
NamingContainer Retrieves a reference to the control's naming container.
Page Gets the Page object that contains the control.
Parent Gets the control's parent in the UI hierarchy.
Site Specifies the site information for the control.
TemplateSourceDirectory Specifies the virtual directory of the page that contains the control.
UniqueID Specifies the unique, hierarchically qualified identity for the control. This differs from ID because it includes the full object hierarchy of the control.
Visible Specifies whether the control should render on the page.

Table C.2 lists the methods shared by all server controls, inherited from the Control object.

Table C.2. Methods of the Control Class Inherited by All Server Controls
Method Description
DataBind Binds data to the specified control.
Dispose Performs any final cleanup before the control is destroyed.
FindControl Searches the current container control for a control specified by string. Returns a Control object.
HasControls Indicates whether the control has any children.
RenderControl Outputs control content to an HtmlTextWriter object specified by writer.
ResolveUrl Resolves a relative URL to an absolute URL based on the value passed to the TemplateSourceDirectory property.

Table C.3 lists the events shared by all server controls, inherited from the Control object.

Table C.3. Events of the Control Class Inherited by All Server Controls
Event Description
DataBinding Occurs when data is bound to the control.
Disposed Occurs when the control is released from memory.
Init Occurs when the control is initialized (this is the first step).
Load Occurs when the control is loaded to the Page object.
PreRender Occurs immediately before the control is rendered.
Unload Occurs when the control is unloaded from memory.


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    Sams Teach Yourself ASP. NET in 21 Days
    Sams Teach Yourself ASP.NET in 21 Days (2nd Edition)
    ISBN: 0672324458
    EAN: 2147483647
    Year: 2003
    Pages: 307
    Authors: Chris Payne

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