ASP.NET.in.a.Nutshell.Second.Edition [Electronic resources]

G. andrew Duthie; matthew Macdonald

نسخه متنی -صفحه : 873/ 540
نمايش فراداده

HtmlControldisposable

System.Web.UI.HtmlControls (system.web.dll)abstract class

This is the base class for all HTML server controls. It includes basic functionalitylike the Disabled property, which you can use to make a control read-only, and the TagName property, which identifies the HTML tag that underlies this control (for example, "div" or "a").

Additionally, you can set and retrieve various other properties through the weakly typed Attributes collection, which contains a name/value collection of all the attributes applied to a tag. You can add a new attribute by assigning to it, as in MyText.Attributes["onblur"]="javascript:alert('Focus lost!');";. This statement, which adds a client-side JavaScript event through an attribute, is the equivalent of using the tag <input type="text" id="MyText" onblur="javascript:alert('Focus lost!');" runat="server"/>. Some attributes may be provided as properties in the derived class. Another dictionary collection, Style, allows you to specify CSS properties for a tag (as in MyText.Style["width"] = "120px").

(Refer to

Cascading Style Sheets: The Definitive Guide (O'Reilly) for more information on different HTML and CSS tag elements.)

public abstract class 

HtmlControl : System.Web.UI.Control, System.Web.UI.IAttributeAccessor { // Public Constructors public

HtmlControl ( ); public

HtmlControl (string

tag ); // Public Instance Properties public AttributeCollection

Attributes {get; } public bool

Disabled {set; get; } public CssStyleCollection

Style {get; } public virtual string

TagName {get; } // Protected Instance Properties protected override bool

ViewStateIgnoresCase {get; } // overrides System.Web.UI.Control // Protected Instance Methods protected override ControlCollection

CreateControlCollection ( ); // overrides System.Web.UI.Control protected override void

Render (System.Web.UI.HtmlTextWriter

writer ); // overrides System.Web.UI.Control protected virtual void

RenderAttributes (System.Web.UI.HtmlTextWriter

writer ); protected virtual void

RenderBeginTag (System.Web.UI.HtmlTextWriter

writer ); }

Hierarchy

System.Object System.Web.UI.Control(System.ComponentModel.IComponent, System.IDisposable, System.Web.UI.IParserAccessor, System.Web.UI.IDataBindingsAccessor) HtmlControl(System.Web.UI.IAttributeAccessor)

Subclasses

HtmlContainerControl, HtmlImage, HtmlInputControl