编辑器图片本地化

利用正则表达式匹配出编辑器内容中<img>标签，上传后再将生成的新图片路径替换Html中的原来的<img>标签

 1 /// <summary>
 2         /// 取得HTML中所有图片的 URL。
 3         /// </summary>
 4         /// <param name="sHtmlText">HTML代码</param>
 5         /// <returns>图片的URL列表</returns>
 6         public static string GetHtmlImageUrlList(string sHtmlText)
 7         {
 8             // 定义正则表达式用来匹配 img 标签
 9             Regex regImg = new Regex(@"<img\b[^<>]*?\bsrc[\s\t\r\n]*=[\s\t\r\n]*[""‘]?[\s\t\r\n]*(?<imgUrl>[^\s\t\r\n""‘<>]*)[^<>]*?/?[\s\t\r\n]*>", RegexOptions.IgnoreCase);
10             // 搜索匹配的字符串
11             MatchCollection matches = regImg.Matches(sHtmlText);
12             int i = 0;
13             string[] sUrlList = new string[matches.Count];
14             // 取得匹配项列表
15             foreach (Match match in matches)
16             {
17                 if (!(match.Groups["imgUrl"].Value.Substring(0, 8) == "/upload/"))
18                 {
19                     WebClient wc = new WebClient();
20                     string fileName = match.Groups["imgUrl"].Value.Substring(match.Groups["imgUrl"].Value.LastIndexOf("/") + 1); //取得原文件名
21                     string upLoadPath = "/upload/" + DateTime.Now.ToString("yyyyMM") + "/" + DateTime.Now.ToString("dd") + "/"; //上传目录相对路径
22                     string fullUpLoadPath = Utils.GetMapPath(upLoadPath); //上传目录的物理路径
23                     if (!Directory.Exists(fullUpLoadPath))
24                     {
25                         Directory.CreateDirectory(fullUpLoadPath);
26                     }
27                     string newFilePath = upLoadPath + fileName; //上传后的路径
28                     wc.DownloadFile(match.Groups["imgUrl"].Value, HttpContext.Current.Server.MapPath(newFilePath));
29                     sHtmlText = sHtmlText.Replace(match.Groups["imgUrl"].Value, upLoadPath + fileName);
30                 }
31             }
32             return sHtmlText;
33         }