用.net正则去除所有的html源码或者提取出图片地址以及存数据库时的符号替换(如富文本编辑器)
参照了别人的博客~前两个基本照搬qwq
http://www.cnblogs.com/vingi/articles/2447861.html
一、去除所有的html源码,只留下文字。(已试验过)
1、引头文件
using System.Text.RegularExpressions
2、编写函数
public static string NoHTML(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; }
二、把html中图片地址提取出来(未实验)
1、先把html的标签符号移除
public static string ParseTags(string HTMLStr) { return System.Text.RegularExpressions.Regex.Replace(HTMLStr, "<[^>]*>", ""); }
2、再把图片地址取出来
public static string GetImgUrl(string HTMLStr) { string str = string.Empty; string sPattern = @"^<img\s+[^>]*>"; Regex r = new Regex(@"<img\s+[^>]*\s*src\s*=\s*([']?)(?<url>\S+)'?[^>]*>", RegexOptions.Compiled); Match m = r.Match(HTMLStr.ToLower()); if (m.Success) str = m.Result("${url}"); return str; }
三、把富文本编辑器里的内容存入数据库时需要进行图片替换 不然会出bug
static public string change(string x)//对富文本编辑器中获取的内容 html标签进行处理,避免它存到数据库的时候被转义 { x = x.Replace("<", "<");//对一些特殊字符进行替换 x = x.Replace(">", ">"); x = x.Replace(""", "\""); return x; }