/// <summary>/// 远程上传从其他网站复制过来的图片/// </summary>public class RemoteUpload{/// <summary>/// 上传的源文件名称/// </summary>private string sOriginalFileName;/// <summary>/// 上传后的文件名称/// </summary>private string sSaveFileName;/// <summary>/// 结合 sContentPath 得取的带路径的上传路径名称/// </summary>private string sPathFileName;/// <summary>/// 上传需要建立目录的临时变量/// </summary>/// <permission cref="System.Security.PermissionSet">private</permission>private string sPath;/// <summary>/// 根据 sBaseUrl 参数转化后的路径(包含sUploadDir)路径/// </summary>private string sContentPath;/// <summary>/// 从HTML文本中下载远程图片/// </summary>/// <param name="sHTML">含有图片网址路径的HTML文本</param>/// <param name="path">保存的路径</param>/// <param name="Images">返回下载的所有图片文件，以“|”间隔！</param>/// <returns>返回替换远程图片路径的HTML文本</returns>public string RtnContent(string sHTML, string path,ref string Images ){string s_Content = sHTML;//设置为在上传内容中搜索指定值的正则表达式System.Text.RegularExpressions.MatchCollection mc = System.Text.RegularExpressions.Regex.Matches(sHTML, @"((http|https|ftp|rtsp|mms):(\/\/|\\\\){1}(([A-Za-z0-9_-])+[.]){1,}(net|com|cn|org|cc|tv|[0-9]{1,3})(\S*\/)((\S)+[.]{1}(gif|jpg|jpeg|bmp|png)))", System.Text.RegularExpressions.RegexOptions.IgnoreCase);string[] a_RemoteUrl = new string[mc.Count];//转入无重复数据for(int i = 0;i < mc.Count;i++){a_RemoteUrl[i] = (mc[i].Groups[0].ToString());}//保存的上传后的文件名称string SaveFileName;//文件类型string SaveFileType;//上传文件自动建目录标志(年月日)    sPath = this.CreateDateTimeDirectory("3");sContentPath = path + "upload/";string VisualPath = path + "upload/";sPath = (sPath.Trim().Equals(System.String.Empty) ? System.String.Empty : System.String.Concat(sPath, "/"));//如果不存在建立目录if(!Directory.Exists(System.IO.Path.Combine(sContentPath, sPath))){Directory.CreateDirectory(System.IO.Path.Combine(sContentPath, sPath));}sOriginalFileName = sOriginalFileName + "|";sSaveFileName = sSaveFileName + "|";sPathFileName = sPathFileName + "|";//遍历上传内容中允许的文件foreach(string str in a_RemoteUrl){//获取上传文件的扩展名SaveFileType = str.Substring(str.LastIndexOf(".") + 1).ToLower();//获取上传后的随机文件名SaveFileName = GetRndFileName(SaveFileType);//保存远程的文件到本地if(SaveRemoteFile(SaveFileName, str)){sOriginalFileName += str.Substring(str.LastIndexOf("/") + 1) + "|";sSaveFileName += SaveFileName + "|";sPathFileName += VisualPath + sPath + SaveFileName + "|";s_Content = s_Content.Replace(str, VisualPath + sPath + SaveFileName);                    }}sOriginalFileName = sOriginalFileName.Substring(0, sOriginalFileName.Length - 1);sSaveFileName = sSaveFileName.Substring(0, sSaveFileName.Length - 1);sPathFileName = sPathFileName.Substring(0, sPathFileName.Length - 1);Images = sPathFileName;return s_Content;}private string GetRndFileName(string filetype){string filename = StringHelper.RadomFileName();return filename + "." + filetype;}/// <summary>/// 保存远程的文件到本地/// </summary>/// <param name="s_LocalFileName">保存到本地文件名</param>/// <param name="s_RemoteFileUrl">远程读取的文件URL</param>/// <returns>如果保存成功则返回 true,否则返回 false</returns>/// <remarks>/// 此方法仅供内部使用，由 ReplaceRemoteUrl 进行调用/// </remarks>private bool SaveRemoteFile(string s_LocalFileName, string s_RemoteFileUrl){bool result = false;string AllowExt = ".jpe|.jpeg|.jpg|.png|.tif|.tiff|.bmp|.gif";//获取远程文件类型string sFileExt;sFileExt = s_RemoteFileUrl.Substring(s_RemoteFileUrl.LastIndexOf("."));if(AllowExt.IndexOf(sFileExt.ToLower()) == -1){result = false;}else{using (System.Net.WebClient wc = new System.Net.WebClient()){//下载远程文件资源        byte[] buff;try{buff = wc.DownloadData(s_RemoteFileUrl);}catch{return false;}if (buff.Length == 0)return false;if (buff.Length / 1024 > 512000)return false;using (System.IO.FileStream fs = new System.IO.FileStream(sContentPath + sPath + s_LocalFileName, System.IO.FileMode.Create, System.IO.FileAccess.Write)){fs.Write(buff, 0, buff.Length);fs.Close();}}//加上水印图片//try//{//    WebImages mark = new WebImages();//    FileStream fs = new FileStream(sContentPath + sPath + s_LocalFileName, FileMode.Open,FileAccess.Read);//    if(!mark.MakeWaterImage(fs, sContentPath + sPath + s_LocalFileName))//    {//        System.Drawing.Image img = System.Drawing.Image.FromStream(fs);//        img.Save(sContentPath + sPath + s_LocalFileName);//    }//    fs.Close();//    fs.Dispose();//    mark = null;//}//catch//{//}result = true;}return result;}/// <summary>/// /// </summary>/// <param name="sign"></param>/// <returns></returns>private string CreateDateTimeDirectory(System.String sign){string path = System.String.Empty;if(sign.Equals("0")){//不建立目录}else if(sign.Equals("1")){//以年为标志建立目录path = DateTime.Now.Year.ToString();}else if(sign.Equals("2")){//以年-月为标志建立目录path = System.String.Concat(DateTime.Now.Year.ToString(), "-", DateTime.Now.Month.ToString("00"));}else if(sign.Equals("3")){//以年-月-日为标志建立目录path = System.String.Concat(DateTime.Now.Year.ToString(), "-", DateTime.Now.Month.ToString("00"), "-", DateTime.Now.Day.ToString("00"));}return path;}}