using System;using System.Collections;using System.Configuration;using System.Data;using System.Linq;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Xml.Linq;using System.Text.RegularExpressions;namespace test{    public partial class RegexTest : System.Web.UI.Page    {        protected void Page_Load(object sender, EventArgs e)        {            if (!IsPostBack)            {                //将img标签替换掉                string imgReg = "<img.*?(?:>|\\/>)";                string imgContent = "<img border=‘0‘ width=‘540px‘ height=‘260px‘ alt=‘海贼王764话专题：白色怪物‘ src=http://www.mamicode.com/‘http://pic2.52pk.com/files/141017/1283574_1G931118.jpg‘>";                                //创建一个正则                Regex reg = new Regex(imgReg);                                //判断imgContent是否含有匹配的字符                bool isMatch = reg.IsMatch(imgContent);                Response.Write(isMatch +"<br />");                Response.Write(imgContent + "<br />");                //替换后的结果                string result = reg.Replace(imgContent,"");                //imgContent的内容 未改变                Response.Write(imgContent + "<br />");                Response.Write(result + "<br />");                Response.Write("=============================获取匹配结果========================<br />");                                //获取匹配结果                string content = "<img src=http://www.mamicode.com/‘a‘/>aaaabbbbcccc";                string pxRegStr = "px";                Regex pxReg = new Regex(imgReg);                //获取匹配的结果数组                var matchs = pxReg.Matches(content);                foreach (var item in matchs)                {                    Response.Write(item + "<br />");                }                Response.Write("=========================获取正则分割匹配结果=====================<br />");                //使用正则分割内容                Regex splitReg = new Regex(imgReg);                //获取匹配的结果数组                var results = pxReg.Split(content);                foreach (var item in results)                {                    Response.Write(item + "<br />");                }            }        }    }}