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Implementing a rel="nofollow" HyperLink serverside control with the Borland Delphi 2005 IDE
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Implementing a rel="nofollow" HyperLink serverside control with the Borland Delphi 2005 IDE
chuacw
Wed, 26 Jan 2005 @ 9:51 AM
Comments
0
Following the various blogs on
Google
,
Simon Willison's
, and
Six Apart Professional Network
,
Robert Love's
,
Scott Watermasysk's
, among others, I have implemented a C# server side control using the Borland Delphi 2005 IDE that extends the HyperLink webcontrol to support the rel="nofollow" attribute.
The Borland Delphi 2005 IDE now can support the following languages: C#, Delphi (Win32 and .NET), and Visual Basic.NET.
The code you see will be pretty much self-explanatory for those of you familiar with the ASP.NET Framework.
[ToolboxData("<{0}:HyperLinkNoFollow runat=server>")]
public class HyperLinkNoFollow : System.Web.UI.WebControls.HyperLink
{
private bool _NoFollow = true;
[Bindable(true), DefaultValue(true)]
public bool NoFollow
{
get
{
return _NoFollow;
}
set
{
_NoFollow = value;
}
}
private string _FollowList = "";
[Bindable(true), DefaultValue("")]
public string FollowList
{
get { return _FollowList; }
set { _FollowList = value; }
}
protected override void AddAttributesToRender(HtmlTextWriter writer)
{
bool LFollow = false;
if (_NoFollow)
{
string LFollowList = _FollowList;
string Url = NavigateUrl;
string[] Domains = null;
char[] Splitter = {';'};
if (LFollowList!=null)
Domains = LFollowList.Split(Splitter);
if (Domains!=null)
{
for(int x=0; x
{
LFollow|=(Domains[x]!="")&&(Url.IndexOf(Domains[x])>-1);
if (LFollow) break;
}
}
if (!LFollow) writer.AddAttribute("rel", "nofollow");
}
// writer.AddAttribute("Follow", LFollow.ToString());
base.AddAttributesToRender(writer);
}
}
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