做新闻文章,我们或多或少地转载别人的成果,那怎么样把图片也下载到自已的服务器里呢?我这有一段代码,敬请指教!
using System; 
using System.Text; using System.Text.RegularExpressions; 
using System.IO; namespace zhang.Common { 
public class HanlerFiles 
{ private string GetImgTag(string htmlStr) { Regex regObj = new Regex("<img.+?>", RegexOptions.Compiled | RegexOptions.IgnoreCase); string strAry = new string[regObj.Matches(htmlStr).Count]; int i = 0; foreach (Match matchItem in regObj.Matches(htmlStr)) { strAry[i] = GetImgUrl(matchItem.Value); i++; 
} return strAry; } private string GetImgUrl(string imgTagStr) { string str = ""; Regex regObj = new Regex("http://.+.(?:jpg|gif|bmp|png)", RegexOptions.Compiled | RegexOptions.IgnoreCase); foreach (Match matchItem in regObj.Matches(imgTagStr)) { str = matchItem.Value; } return str; } /**//// <summary> /// 根椐Html内空自动识别图像文件,并下载到服务器指定目录 /// </summary> /// <param name="strHTML"></param> /// <param name="path"></param> /// <returns></returns> public int SaveUrlPics(ref string strHTML, string path) { string imgurlAry = GetImgTag(strHTML); try { for (int i = 0; i < imgurlAry.Length; i++) { //WebRequest req = WebRequest.Create(imgurlAry[i]); string preStr = System.DateTime.Now.ToString() + "_"; preStr = preStr.Replace("-", ""); preStr = preStr.Replace(":", ""); preStr = preStr.Replace(" ", ""); WebClient wc = new WebClient(); wc.DownloadFile(imgurlAry[i], HttpContext.Current.Server.MapPath(path) + "/" + preStr + imgurlAry[i].Substring(imgurlAry[i].LastIndexOf("/") + 1)); strHTML = strHTML.Replace(imgurlAry[i], path + preStr + imgurlAry[i].Substring(imgurlAry[i].LastIndexOf("/") + 1)); } } catch (Exception ex) { //return ex.Message; } return imgurlAry.Length; } } }
using 