We create a C# class within its own namespace so that we may use the breadcrumb navigation on all pages of our website as well as other websites we create. Later we will create a Web User Control (.ascx) that can be easily dropped into the header of our pages.
C#:
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using System;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.ComponentModel;
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using System.Text;
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// We include the System.Text namespace so we can use the StringBuilder object later.
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namespace BreadCrumbs
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{
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/// <summary>
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/// Summary description for ctrlBreadCrumbs.
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/// </summary>
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public class ctrlBreadCrumbs : System.Web.UI.WebControls.WebControl
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{
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/// <summary>
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/// The 3 variables below, Separator, RootName, directoryNameSpacer can be changed to meet your needs
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/// PageTitle is pulled from the CodeBehind of the page
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/// </summary>
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public string Separator = "> ";
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public string RootName = "Home Page";
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public char directoryNameSpacer = '_';
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private string _PageTitle;
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// Above are our variables that we can set:
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// Separator is the ‘>’ symbol
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// RootName is the homepage anchor text
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// directoryNameSpacer is the naming scheme for my directories, for example: search_engine_optimization or website_design (notice the URL in the address bar above)
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public string PageTitle
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{
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get
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{
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return _PageTitle;
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}
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set
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{
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_PageTitle = value;
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}
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}
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/// <summary>
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/// Render this control to the output parameter specified.
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/// </summary>
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/// <param name="output"> The HTML writer to write out to </param>
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protected override void Render(HtmlTextWriter output)
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{
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// sbResult StringBuilder will hold the breadcrumb navigation when done
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// get the url root, like www.domain.com
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string strDomain = Page.Request.ServerVariables["HTTP_HOST"].ToString();
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strDomain.Trim(); // Trim removes leading and trailing whitespace
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sbResult.Append ( "<a href='http://" + strDomain + "'>" + RootName + "</a>" + Separator );
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// gets dir(s), like subdirectory/subsubdirectory/file.aspx
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string scriptName = Page.Request.ServerVariables["SCRIPT_NAME"].ToString();
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// find the last '/' and Remove the text after it as it's the file name
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int lastSlash = scriptName.LastIndexOf('/'); // returns the # of chars. from right to /
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string pathOnly = scriptName.Remove(lastSlash, (scriptName.Length - lastSlash));
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// create breadcrumb HTML for the directory name(s)
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// We Remove the first "/" otherwise when you split the string the first item in array is empty
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pathOnly = pathOnly.Substring(1);
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string[] strDirs = pathOnly.Split('/');
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int nNumDirs = strDirs.Length;
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// URLs for breadcrumbs
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string strURL = "";
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for (int i=0; i<nNumDirs; i++)
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{
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strURL += "/"+strDirs[i];
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// convert underscores to spaces
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strDirs[i] = strDirs[i].Replace(directoryNameSpacer,' ');
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int counter = i+1;
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if (counter != nNumDirs)
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{
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sbResult.Append ( "<a href='http://" + strDomain + strURL + "'>" + strDirs[i] + "</a>" + Separator );
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}
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else
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{
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// This is the last directory so don't tack on Separator
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sbResult.Append ( "<a href='http://" + strDomain + strURL + "'>" + strDirs[i] + "</a>" ); }
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}
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// write the PageTitle, pulled from the CodeBehind!
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sbResult.Append ( " : " + this.PageTitle );
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output.Write ( sbResult.ToString() );
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}
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}
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}
Book it:
