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Posted 20 Feb 2012

Dynamically Register StyleSheet File in ASP.NET

, 20 Feb 2012 CPOL
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How to register a stylesheet file at run time

Sometimes it is useful to register an external stylesheet file at runtime dynamically. For example, when we develop portals, this solution can helpful. Because a portal is a comprehensive web based application and a portal user must be able to implement its requirements.

I have a class in my portal that contains useful functions. The name of the class is Functions. In this class, I have many functions that help impement my requirements in a portal. The register stylesheet function is as follows:

public static bool registerStyleSheetFileDynamic(string styleSheetFilePath, System.Web.UI.Page page)
 styleSheetFilePath = page.ResolveClientUrl(styleSheetFilePath);
 if (page != null)
  System.Web.UI.HtmlControls.HtmlHead head = (System.Web.UI.HtmlControls.HtmlHead)page.Header;
  bool isExistStyleSheet = false;
  foreach (System.Web.UI.Control item in head.Controls)
    if (item is System.Web.UI.HtmlControls.HtmlLink && 
          ((System.Web.UI.HtmlControls.HtmlLink)item).Attributes["href"] == styleSheetFilePath)
      isExistStyleSheet = true;
  if (!isExistStyleSheet)
   System.Web.UI.HtmlControls.HtmlLink link = new System.Web.UI.HtmlControls.HtmlLink();
   link.Attributes.Add("href", page.ResolveClientUrl(styleSheetFilePath));
   link.Attributes.Add("type", "text/css");
   link.Attributes.Add("rel", "stylesheet");
  return true;
 return false;

In this case I can send my arbitrary page and path of stylesheet file to this method in any point in my portal page and so on. I hope the other parts are clear. Thanks!


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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Software Developer FRI
Iran (Islamic Republic of) Iran (Islamic Republic of)
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