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/**
* Namespace: System.Web.UI.WebControls
* Class: HyperLink
*
* Author: Gaurav Vaish
* Maintainer: gvaish@iitk.ac.in
* Contact: gvaish@iitk.ac.in, myscripts_2001@yahoo.com
* Implementation: yes
* Status: 100%
*
* (C) Gaurav Vaish (2001)
*/
using System;
using System.Web;
using System.Web.UI;
using System.ComponentModel;
namespace System.Web.UI.WebControls
{
[DefaultProperty("Text")]
//[Designer(??)]
[ControlBuilder(typeof(HyperLinkControlBuilder))]
//[DataBindingHandler("??")]
[ParseChildren(false)]
[ToolboxData("<{0}:HyperLink runat=\"server\">HyperLink</{0}:HyperLink>")]
public class HyperLink: WebControl
{
public HyperLink(): base(HtmlTextWriterTag.A)
{
}
public virtual string ImageUrl
{
get
{
object o = ViewState["ImageUrl"];
if(o!=null)
return (string)o;
return String.Empty;
}
set
{
ViewState["ImageUrl"] = value;
}
}
public string NavigateUrl
{
get
{
object o = ViewState["NavigateUrl"];
if(o!=null)
return (string)o;
return String.Empty;
}
set
{
ViewState["NavigateUrl"] = value;
}
}
public string Target
{
get
{
object o = ViewState["Target"];
if(o!=null)
return (string)o;
return String.Empty;
}
set
{
ViewState["Target"] = value;
}
}
public virtual string Text
{
get
{
object o = ViewState["Text"];
if(o!=null)
return (string)o;
return String.Empty;
}
set
{
ViewState["Text"] = value;
}
}
protected override void AddAttributesToRender(HtmlTextWriter writer)
{
base.AddAttributesToRender(writer);
if(NavigateUrl.Length > 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Href, NavigateUrl);
}
if(Target.Length > 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Target, Target);
}
}
protected override void AddParsedSubObject(object obj)
{
if(HasControls())
{
base.AddParsedSubObject(obj);
return;
}
if(obj is LiteralControl)
{
Text = ((LiteralControl)obj).Text;
return;
}
if(Text.Length > 0)
{
base.AddParsedSubObject(Text);
Text = String.Empty;
}
base.AddParsedSubObject (obj);
}
protected override void LoadViewState(object savedState)
{
if(savedState != null)
{
base.LoadViewState(savedState);
object o = ViewState["Text"];
if(o!=null)
Text = (string)o;
}
}
protected override void RenderContents(HtmlTextWriter writer)
{
if(ImageUrl.Length > 0)
{
Image img = new Image();
img.ImageUrl = ResolveUrl(ImageUrl);
if(ToolTip.Length > 0)
img.ToolTip = ToolTip;
if(Text.Length > 0)
img.AlternateText = Text;
img.RenderControl(writer);
return;
}
if(HasControls())
{
base.RenderControl(writer);
return;
}
writer.Write(Text);
}
}
}
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