自动识别HTML代码里的图片链接,并下载到服务器的指定代码,Asp.Net代码库,德仔网

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【Asp.Net】自动识别HTML代码里的图片链接,并下载到服务器的指定

作者:Dezai.CN / 发布于2013/11/7/ 569

自动识别HTML代码里的图片链接,并下载到服务器的指定目录源码


	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;
	 }
	
	 }
	}

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