图片下载问题

Question

需要实现功能：从网上复制一篇文章下来，包括文字，图片（有些图片是在本地），将文章的HTML代码保存到数据库，文章中的图片要下载下来放在本地，同时HTML中的图片链接地址也要换成本地路径。下次打开该文章，图片就是本地的。  
       问题：功能基本实现了，就是在HTML中用正则找到图片，一个循环将HTML中所有图片路径换成本地路径，在网上复制文章时没有问题，如果图片在本地，保存后会连着2个图片地址指向同一路径。  
比如说一篇文章有10张图，图片链接为：001.jpg,002.jpg，003.jpg，004.jpg，005.jpg，006.jpg，007.jpg，008.jpg，009.jpg，010.jpg，保存后HTML中的链接变成001.jpg,002.jpg，002.jpg，003.jpg，003.jpg，004.jpg，004.jpg，005.jpg，005.jpg，006.jpg，调试的时候将断点设在循环内，按F5循环10次后，结果是正确的，如果只循环了5次然后将断点去掉，那么前5张图片链接正确，后5张又开始2张重复。  
下面是代码：  
               //保存  
               string  content  =  txtContent.Text.Trim();  
               Model_Info_Resource  m_Info_Resource  =  new  Model_Info_Resource();  
               m_Info_Resource.Info_Type  =  int.Parse(ddlType.SelectedItem.Value);  
               m_Info_Resource.Info_Game  =  int.Parse(ddlGame.SelectedItem.Value);  
               m_Info_Resource.Info_Title  =  txtTitle.Text.Trim();  
               m_Info_Resource.Info_Keyword  =  txtKeyword.Text.Trim();  
               m_Info_Resource.UserID  =  int.Parse(Session["userID"].ToString());  
 
               //将内容的图片下载到本地  
               string  regImg  =  @"<img[^>]*src=(['""]?)[^'""\s>]*\1?[^>]*>";//匹配图片的正则  
               string  regSrc  =  @"src=(['""]?)[^'""\s]*\1?(\s)?";//匹配SRC的正则  
               MatchCollection  col  =  Regex.Matches(content,  regImg,  RegexOptions.IgnoreCase);  
               string  img  =  "";  
               string  url  =  "";  
               string  oldUrl  =  "";  
               string  fileName  =  "";  
               WebClient  client  =  new  WebClient();  
 
               for  (int  i  =  0;  i  <  col.Count;  i++)  
               {  
                       img  =  col[i].Value;  
                       url  =  Regex.Match(img,  regSrc).Value;  
                       url  =  url.Substring(url.IndexOf("src=")  +  4,  url.Length  -  url.IndexOf("src=")  -  4);  
                       url  =  url.Replace("\"",  "").Trim();  
                       if  (url  ==  "")  
                       {  
                               continue;  
                       }  
                       oldUrl  =  url;  
                       int  flag  =  0;  
                       if  (url.Substring(0,  12).ToString()  ==  "UploadImages")//图片在本地  
                       {  
                               flag  =  1;  
                               url  =  Server.MapPath(url);  
                               //if  (File.Exists(url))  
                               //{  
                               //        continue;  
                               //}  
                       }  
 
                       fileName  =  getFileName();//用随机数表示图片名称  
                       content  =  content.Replace(oldUrl,  "UploadImages\\"  +  fileName);//替换文章中的图片链接  
                       fileName  =  Server.MapPath("UploadImages\\")  +  fileName;  
 
                       if  (!File.Exists(fileName))  
                       {  
                               if  (flag  ==  0)//图片在网上下  
                               {  
                                       try  
                                       {  
                                               client.DownloadFile(url,  fileName);  
                                       }  
                                       catch  
                                       {  }  
                               }  
                               else//图片在本地  
                               {  
                                       try  
                                       {  
                                               File.Copy(url,  fileName);  
                                       }  
                                       catch  {  }  
                               }  
                       }  
               }  
               client.Dispose();  
 
               m_Info_Resource.Info_Content  =  content;  
               int  info_ID  =  Convert.ToInt32(ViewState["infoID"]);  
               int  returnValue  =  0;  
               if  (info_ID  ==  0)//新增  
               {  
                       try  
                       {  
                               returnValue  =  BLL_Info_Resource.Insert(m_Info_Resource);  
                       }  
                       catch  
                       {  
                               return;  
                       }  
               }  
               else  
               {  
                       m_Info_Resource.Info_ID  =  info_ID;  
                       try  
                       {  
                               returnValue  =  BLL_Info_Resource.Update(m_Info_Resource);  
                       }  
                       catch  
                       {  
                               return;  
                       }  
               }  
               if  (returnValue  ==  -1)  
               {  
                       labMsg.Visible  =  true;  
                       return;  
               }  
 
               if  (info_ID  ==  0)  
               {  
                       txtTitle.Text  =  "";  
                       txtContent.Text  =  "";  
                       txtKeyword.Text  =  "";  
                       BaseHelp.Alert("保存成功",  Page);  
               }  
               else  
               {  
                       Response.Write("<script>alert('保存成功');window.location='InfoList.aspx';</script>");  
               }

Answer 1

你用來做什麼的?另存為好了,哈哈!