正則表示式獲取HTML標記中的內容（C#）
阿新 • • 發佈：2019-02-19
//=====================Begin1======================== //試驗字串string strTmp =string.Empty; //正則表示式string tmpStr =string.Empty; //取出指定HTML標記中的匹配項的值RegexOptions.IgnoreCase忽略大小寫，RegexOptions.Multiline忽略多行顯示， //tmpStr = "<title>([^<]*)</title>" //獲取<title>之間內容 strTmp =@"<add key='ConnectionString' value='server=localhost;database=資料庫名;uid=sa;pwd=;pooling=true'/>"; //獲取“database=”與“;”號之間的字串：database=(.*); tmpStr ="database=([^;]*);"; Match TitleMatch = Regex.Match(strTmp, tmpStr ,RegexOptions.IgnoreCase | RegexOptions.Multiline ); //如下例子作語法參考用獲取size的值，實際應用可能不會如此複雜 strTmp ="><font color='red' size=6>WebForm3</font><" ; tmpStr =@"<(w+s+w+[=]+[']+w+[']+s+[size=]+d)>"; Match TitleMatch = Regex.Match(strTmp ,tmpStr , RegexOptions.IgnoreCase | RegexOptions.Multiline ); //取出匹配項的值string tmpStrTitle = TitleMatch.Groups[1].Value; //替換掉HTML頁中所有HTML標記 Label1.Text=Regex.Replace(Label1.Text.Trim(),"<.+?>","")+"*********"+TitleMatch.Groups[1].Value; //判斷匹配正則表示式是否成功if(Regex.Match(tmpStr,"<.+?>").Success)
{
//操作
} //=====================End1======================== //=====================Begin2========================string webDocContent="<a href=http://www.xxx.xxx/college/pages/default.htm target=_blank>師資隊伍</A>"; //解釋下面正則表示式：[s]表示匹配空格字元，"+" 表示連線string strPattern=@"a[s]+href=(?<Link>[^s>]+)[^>]*>(?<Text>[^<]*)</a>"; //獲取連結顯示的文字 MatchCollection Matches=Regex.Matches(webDocContent,strPattern,RegexOptions.IgnoreCase|RegexOptions.Compiled); foreach(Match NextMatch in Matches) { string URL=NextMatch.Groups["Link"].Value.ToString().Trim(); string URLText=NextMatch.Groups["Text"].Value.ToString().Trim(); Response.Write(URL+"****"); Response.Write(URLText); } //=====================End2======================== //=====================Begin3========================string strPageContent =string.Empty; StreamReader srPage =new StreamReader(@"e:save.txt",System.Text.Encoding.GetEncoding("gb2312")); strPageContent = srPage.ReadToEnd(); srPage.Close(); //(/s)*表示0或多個空格符、回車符等，*表示比配0或多個。(.*?)表示除回車符外的所有資訊 MatchCollection TitleMatchs = Regex.Matches(strPageContent, "<td width="85%" class="common_text">((/s)*(.*?)(/s)*(.*?)(/s)*(.*?)(/s)*(.*?)(/s)*)</td>", RegexOptions.IgnoreCase | RegexOptions.Multiline ); int tmpNum =0; //迴圈正則表示式所獲取的，滿足表示式的內容集合foreach(Match NextMatch in TitleMatchs) { ++tmpNum; Label1.Text += tmpNum +"<br>****"+ NextMatch.Groups[1].Value; } //=====================End3========================