helper.cs

wrox c#高级编程

using System;
using System.Data;
using System.Web;
using System.Text.RegularExpressions;

namespace Wrox.WebModules.Forums.Business
{
	/// <summary>
	/// Summary description for Helper.
	/// </summary>
	public class Helper: Wrox.WebModules.Business.BizObject
	{
		public static string ProcessSpecialTags(string text)
		{
			Configuration.ModuleSettings settings = Configuration.ModuleConfig.GetSettings();
			
			// encode the text if HTML code is not allowed. This must be done before
			// translating the special tags to real HTML tags
			if (!settings.HtmlEnabled)
				text = HttpUtility.HtmlEncode(text);

			// if the special tags are enabled, process them
			if (settings.SpecialTagsEnabled)
			{
				string smiliesFolder = settings.SmiliesFolder;
				if (!smiliesFolder.EndsWith("/")) smiliesFolder += "/";
				// replace the bold special tags
				text = Regex.Replace(text, "\\[B\\](?<boldText>.*)\\[/B\\]", 
					"<b>${boldText}</b>", RegexOptions.IgnoreCase);
				// replace the underline special tags
				text = Regex.Replace(text, "\\[U\\](?<underlineText>.*)\\[/U\\]", 
					"<u>${underlineText}</u>", RegexOptions.IgnoreCase);
				// replace the italic special tags
				text = Regex.Replace(text, "\\[I\\](?<italicText>.*)\\[/I\\]", 
					"<i>${italicText}</i>", RegexOptions.IgnoreCase);
				// replace the smilies
				text = text.Replace("[:)]", "<img src=\"" + smiliesFolder + "Smile.gif\" border=\"0\"/>");
				text = text.Replace("[:D]", "<img src=\"" + smiliesFolder + "LargeSmile.gif\" border=\"0\"/>");
				text = text.Replace("[8)]", "<img src=\"" + smiliesFolder + "Cool.gif\" border=\"0\"/>");
				text = text.Replace("[:(]", "<img src=\"" + smiliesFolder + "Sad.gif\" border=\"0\"/>");
				text = text.Replace("[:o]", "<img src=\"" + smiliesFolder + "Surprise.gif\" border=\"0\"/>");
				text = text.Replace("[:x]", "<img src=\"" + smiliesFolder + "Angry.gif\" border=\"0\"/>");
				// replace the URL tag
				text = Regex.Replace(text, "\\[URL\\](?<url>.*)\\[/URL\\]", 
					"<a href=\"${url}\" target=\"_blank\">${url}</a>", RegexOptions.IgnoreCase);
				// replace the EMAIL tag
				text = Regex.Replace(text, "\\[EMAIL\\](?<email>.*)\\[/EMAIL\\]", 
					"<a href=\"mailto:${email}\">${email}</a>", RegexOptions.IgnoreCase);
			}

			// replace the quote tags. Quoting is enabled even if the special tags are not
			text = Regex.Replace(text, "\\[QUOTE\\]", 
				"<font size=\"1\"><blockquote>quote:<hr height=\"1\" noshade>", 
				RegexOptions.IgnoreCase);
			text = Regex.Replace(text, "\\[/QUOTE\\]", 
				"<hr height=\"1\" noshade></blockquote></font>", 
				RegexOptions.IgnoreCase);

			// replace the new line and carriage return chars
			text = text.Replace("\n", "<br>");
			text = text.Replace("\r", "");

			return text;
		}
	}
}