Remove Html : String Util « Data Types « C# / C Sharp

1. C# / C Sharp
2. Data Types
3. String Util

Remove Html

    

#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;


namespace Newtonsoft.Utilities.Text
{
  public static class StringExtensions
  {

    public static string RemoveHtml(this string s)
    {
      return RemoveHtmlInternal(s, null);
    }

    public static string RemoveHtml(this string s, IList<string> removeTags)
    {
      if (removeTags == null)
        throw new ArgumentNullException("removeTags");

      return RemoveHtmlInternal(s, removeTags);
    }

    private static string RemoveHtmlInternal(string s, IList<string> removeTags)
    {
      List<string> removeTagsUpper = null;

      if (removeTags != null)
      {
        removeTagsUpper = new List<string>(removeTags.Count);

        foreach (string tag in removeTags)
        {
          removeTagsUpper.Add(tag.ToUpperInvariant());
        }
      }

      Regex anyTag = new Regex(@"<[/]{0,1}\s*(?<tag>\w*)\s*(?<attr>.*?=['""].*?[""'])*?\s*[/]{0,1}>", RegexOptions.Compiled);

      return anyTag.Replace(s, delegate(Match match)
      {
        string tag = match.Groups["tag"].Value.ToUpperInvariant();

        if (removeTagsUpper == null)
          return string.Empty;
        else if (removeTagsUpper.Contains(tag))
          return string.Empty;
        else
          return match.Value;
      });
    }
  }
}

   
    
    
    
  

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