如何提取一个页面中所有的文字（纯文字，排除图片 、链接、html 标签）

[le616]

thanks!

[xuexiaodong2009]

正则表达式

[q107770540]

/// <summary>
    /// 去掉html标记
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    protected static string ConvertGettext(string str)
    {
        Regex regex = new Regex(@"\<(.*?)\>", RegexOptions.IgnoreCase);

        return regex.Replace(str, "").Replace(" ", "").Replace("\n", "").Replace("\r", "");
    }

 

具体情况你可以发个示例来看看

[moonwrite]

http://topic.csdn.net/u/20110508/21/b00b79a9-c90b-4a01-8ab6-225243547d04.html

[chenhongjun0624]

不会 帮顶

[mimangshamo]

用正则去掉页面所有HTML

[子夜__]

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

namespace WikiPageCreater.Common
{
    public class PageHelper
    {
        /// <summary>
        /// 根据 url 获取网页编码
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        public static string GetEncoding(string url)
        {
            HttpWebRequest request = null;
            HttpWebResponse response = null;
            StreamReader reader = null;
            try
            {
                request = (HttpWebRequest)WebRequest.Create(url);
                request.Timeout = 20000;
                request.AllowAutoRedirect = false;

                response = (HttpWebResponse)request.GetResponse();
                if (response.StatusCode == HttpStatusCode.OK && response.ContentLength < 1024 * 1024)
                {
                    if (response.ContentEncoding != null && response.ContentEncoding.Equals("gzip", StringComparison.InvariantCultureIgnoreCase))
                        reader = new StreamReader(new GZipStream(response.GetResponseStream(), CompressionMode.Decompress));
                    else
                        reader = new StreamReader(response.GetResponseStream(), Encoding.ASCII);

                    string html = reader.ReadToEnd();

                    Regex reg_charset = new Regex(@"charset\b\s*=\s*(?<charset>[^""]*)");
                    if (reg_charset.IsMatch(html))
                    {
                        return reg_charset.Match(html).Groups["charset"].Value;
                    }
                    else if (response.CharacterSet != string.Empty)
                    {
                        return response.CharacterSet;
                    }
                    else
                        return Encoding.Default.BodyName;
                }
            }
            catch
            {
            }
            finally
            {

                if (response != null)
                {
                    response.Close();
                    response = null;
                }
                if (reader != null)
                    reader.Close();

                if (request != null)
                    request = null;

            }

            return Encoding.Default.BodyName;
        }

        /// <summary>
        /// 根据 url 和 encoding 获取当前url页面的 html 源代码        
       /// </summary>
        /// <param name="url"></param>
        /// <param name="encoding"></param>
        /// <returns></returns>
        public static string GetHtml(string url, Encoding encoding)
        {
            HttpWebRequest request = null;
            HttpWebResponse response = null;
            StreamReader reader = null;
            try
            {
                request = (HttpWebRequest)WebRequest.Create(url);
                request.Timeout = 20000;
                request.AllowAutoRedirect = false;

                response = (HttpWebResponse)request.GetResponse();
                if (response.StatusCode == HttpStatusCode.OK && response.ContentLength < 1024 * 1024)
                {
                    if (response.ContentEncoding != null && response.ContentEncoding.Equals("gzip", StringComparison.InvariantCultureIgnoreCase))
                        reader = new StreamReader(new GZipStream(response.GetResponseStream(), CompressionMode.Decompress), encoding);
                    else
                        reader = new StreamReader(response.GetResponseStream(), encoding);
                    string html = reader.ReadToEnd();

                    return html;
                }
            }
            catch
            {
            }
            finally
            {

                if (response != null)
                {
                    response.Close();
                    response = null;
                }
                if (reader != null)
                    reader.Close();

                if (request != null)
                    request = null;

            }

            return string.Empty;
        }
    }
}

然后正则取

[le616]

[Quote=引用 2 楼 q107770540 的回复:]
C# code


/// <summary>
/// 去掉html标记
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
protected static string ConvertGettext(string str)
{
……
[/Quote]
-----------------
具体情况是这样的 想调用微软的翻译实现多国语言
一次传输太多内容会翻译不了，想把需要翻译的内容，分成几段传输过去
想把网页生成的html中需要翻译的内容提取出来，然后再翻译

[realdja]

[Quote=引用 2 楼 q107770540 的回复:]

C# code

/// <summary>
/// 去掉html标记
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
protected static string ConvertGettext(string str)
{
Regex r……
[/Quote]
非特殊问题 这个就可以了

[ASPNETCHENGXU]

正则吧。。

[weike021996]

[Quote=引用 2 楼 q107770540 的回复:]

C# code

/// <summary>
/// 去掉html标记
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
protected static string ConvertGettext(string str)
{
Regex r……
[/Quote] +1

[wang_jian_999]

protected static string ConvertGettext(string str)
{
Regex regex = new Regex(@"\<(.*?)\>", RegexOptions.IgnoreCase);

return regex.Replace(str, "").Replace(" ", "").Replace("\n", "").Replace("\r", "");
}

[arecaiz]

 public static string DropHTML(string Htmlstring)
        {
            //删除脚本  
            Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
            //删除HTML  
            Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);

            Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);
            Htmlstring.Replace("<", "");
            Htmlstring.Replace(">", "");
            Htmlstring.Replace("\r\n", "");
            Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();
            return Htmlstring;
        }

[新时代新目标新征程]

不错收藏之

[haihuan23]

mark

[spring0906]

收藏；了

[zthsn]

帮顶 学习下

[asuntir123]

如果页面有大量的css呢？

[mulk]

学习了，正好在学这方面的呢