htm2txt c#源代码（转载）

using System;public class Html2Text{ public static void Main(string[] args) { if (args.Length 1) { Console.WriteLine("usage: Htm2Txt xxxx.htm [target.txt]"); }

peter1_jiang

640人浏览 · 2007-10-22 15:12:00

peter1_jiang · 2007-10-22 15:12:00 发布

using System;
public class Html2Text
{
     public static void Main( string [] args)
    {
         if (args.Length < 1 )
        {
            Console.WriteLine( " usage: Htm2Txt xxxx.htm [target.txt] " );
        }
         else
        {
            Console.WriteLine(StripHTML( " <html><head><title>测试</title></head><body>哈哈</body></html> " ));
        }
         char name1 = Convert.ToChar( "" );
        Console.WriteLine( " ' " + name1 + " ' " );
    }
     private static string StripHTML( string source)
    {
         try
        {
             string result;

             // Remove HTML Development formatting
            result = source.Replace( " /r " , " " );         // Replace line breaks with space because browsers inserts space
            result = result.Replace( " /n " , " " );         // Replace line breaks with space because browsers inserts space
            result = result.Replace( " /t " , string .Empty);     // Remove step-formatting
            result = System.Text.RegularExpressions.Regex.Replace(result, @" ( )+ " , " " );     // Remove repeating speces becuase browsers ignore them

             // Remove the header (prepare first by clearing attributes)
            result = System.Text.RegularExpressions.Regex.Replace(result, @" <( )*head([^>])*> " , " <head> " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" (<( )*(/)( )*head( )*>) " , " </head> " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, " (<head>).*(</head>) " , string .Empty, System.Text.RegularExpressions.RegexOptions.IgnoreCase);

             // remove all scripts (prepare first by clearing attributes)
            result = System.Text.RegularExpressions.Regex.Replace(result, @" <( )*script([^>])*> " , " <script> " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" (<( )*(/)( )*script( )*>) " , " </script> " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
             // result = System.Text.RegularExpressions.Regex.Replace(result, @"(<script>)([^(<script>/.</script>)])*(</script>)",string.Empty, System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" (<script>).*(</script>) " , string .Empty, System.Text.RegularExpressions.RegexOptions.IgnoreCase);

             // remove all styles (prepare first by clearing attributes)
            result = System.Text.RegularExpressions.Regex.Replace(result, @" <( )*style([^>])*> " , " <style> " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" (<( )*(/)( )*style( )*>) " , " </style> " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, " (<style>).*(</style>) " , string .Empty, System.Text.RegularExpressions.RegexOptions.IgnoreCase);

             // insert tabs in spaces of <td> tags
            result = System.Text.RegularExpressions.Regex.Replace(result, @" <( )*td([^>])*> " , " /t " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);

             // insert line breaks in places of <BR> and <LI> tags
            result = System.Text.RegularExpressions.Regex.Replace(result, @" <( )*br( )*> " , " /r " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" <( )*li( )*> " , " /r " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);

             // insert line paragraphs (double line breaks) in place if <P>, <DIV> and <TR> tags
            result = System.Text.RegularExpressions.Regex.Replace(result, @" <( )*div([^>])*> " , " /r/r " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" <( )*tr([^>])*> " , " /r/r " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" <( )*p([^>])*> " , " /r/r " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);

             // Remove remaining tags like <a>, links, images, comments etc - anything thats enclosed inside < >
            result = System.Text.RegularExpressions.Regex.Replace(result, @" <[^>]*> " , string .Empty, System.Text.RegularExpressions.RegexOptions.IgnoreCase);

             // replace special characters:
            result = System.Text.RegularExpressions.Regex.Replace(result, @"   " , " " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);

            result = System.Text.RegularExpressions.Regex.Replace(result, @" • " , " * " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" &lsaquo; " , " < " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" &rsaquo; " , " > " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" ™ " , " (tm) " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" &frasl; " , " / " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" < " , " < " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" > " , " > " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" © " , " (c) " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, @" ® " , " (r) " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
             // Remove all others. More can be added, see http://hotwired.lycos.com/webmonkey/reference/special_characters/
            result = System.Text.RegularExpressions.Regex.Replace(result, @" &(.{2,6}); " , string .Empty, System.Text.RegularExpressions.RegexOptions.IgnoreCase);

             // for testng
             // System.Text.RegularExpressions.Regex.Replace(result, this.txtRegex.Text,string.Empty, System.Text.RegularExpressions.RegexOptions.IgnoreCase);

             // make line breaking consistent
            result = result.Replace( " /n " , " /r " );

             // Remove extra line breaks and tabs: replace over 2 breaks with 2 and over 4 tabs with 4.
             // Prepare first to remove any whitespaces inbetween the escaped characters and remove redundant tabs inbetween linebreaks
            result = System.Text.RegularExpressions.Regex.Replace(result, " (/r)( )+(/r) " , " /r/r " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, " (/t)( )+(/t) " , " /t/t " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, " (/t)( )+(/r) " , " /t/r " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, " (/r)( )+(/t) " , " /r/t " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            result = System.Text.RegularExpressions.Regex.Replace(result, " (/r)(/t)+(/r) " , " /r/r " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);     // Remove redundant tabs
            result = System.Text.RegularExpressions.Regex.Replace(result, " (/r)(/t)+ " , " /r/t " , System.Text.RegularExpressions.RegexOptions.IgnoreCase);         // Remove multible tabs followind a linebreak with just one tab
             string breaks = " /r/r/r " ;         // Initial replacement target string for linebreaks
             string tabs = " /t/t/t/t/t " ;         // Initial replacement target string for tabs
             for ( int index = 0 ; index < result.Length; index ++ )
            {
                result = result.Replace(breaks, " /r/r " );
                result = result.Replace(tabs, " /t/t/t/t " );
                breaks = breaks + " /r " ;
                tabs = tabs + " /t " ;
            }
             return result;
        }
         catch
        {
        }
         return source;
    }
};