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string FullName = file_data.FileName.ToString();//文档全名
int Length = file_data.FileName.Length;
string fn = DateTime.Now.ToString("yyyyMMddHHmmss") + FullName;
string Type = FullName.Substring(FullName.LastIndexOf(".") + 1);//提取文档类型
file_data.SaveAs(Server.MapPath("~\\XYGL\\Admin\\Upload") + "\\" + fn);//将导入的TXT文本备份到Upload
string path = Server.MapPath("~\\XYGL\\Admin\\Upload\\" + fn);
FileInfo finfo = new FileInfo(path);
byte[] content = new byte[finfo.Length];
FileStream stream = finfo.OpenRead();
stream.Read(content, 0, content.Length);
stream.Close();