标签:asp string filePath HttpContext 下载方式 filename Current net response
1 /// <summary> 2 /// 下载文件 TransmitFile 3 /// </summary> 4 /// <param name="filePath"></param> 5 public static void DownloadFile(string filePath) 6 { 7 string filename = HttpContext.Current.Server.MapPath(filePath); 8 var response = HttpContext.Current.Response; 9 response.ContentType = "application/x-zip-compressed"; 10 response.AddHeader("Content-Disposition", "attachment;filename=" + Path.GetFileName(filename) ); 11 response.TransmitFile(filename); 12 } 13 14 /// <summary> 15 /// 下载大文件 16 /// </summary> 17 /// <param name="filePath"></param> 18 public static void DownloadBigFile(string filePath) 19 { 20 filePath = HttpContext.Current.Server.MapPath(filePath);//路径 21 string fileName = Path.GetFileName(filePath);//客户端保存的文件名 22 var response = HttpContext.Current.Response; 23 System.IO.FileInfo fileInfo = new System.IO.FileInfo(filePath); 24 if (fileInfo.Exists == true) 25 { 26 const long ChunkSize = 102400;//100K 每次读取文件,只读取100K,这样可以缓解服务器的压力 27 28 byte[] buffer = new byte[ChunkSize]; 29 30 response.Clear(); 31 System.IO.FileStream iStream = System.IO.File.OpenRead(filePath); 32 long dataLengthToRead = iStream.Length;//获取下载的文件总大小 33 response.ContentType = "application/octet-stream"; 34 response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName)); 35 while (dataLengthToRead > 0 && response.IsClientConnected) 36 { 37 //读取的大小 Response.OutputStream.Write(buffer, 0, lengthRead); 38 int lengthRead = iStream.Read(buffer, 0, Convert.ToInt32(ChunkSize)); 39 response.Flush(); 40 dataLengthToRead = dataLengthToRead - lengthRead; 41 } 42 43 response.Close(); 44 } 45 } 46 47 /// <summary> 48 /// 流方式下载 49 /// </summary> 50 /// <param name="filePath"></param> 51 public static void DownloadFileStream(string filePath) 52 { 53 filePath = HttpContext.Current.Server.MapPath(filePath);//路径 54 string fileName = Path.GetFileName(filePath);//客户端保存的文件名 55 var response = HttpContext.Current.Response; 56 FileStream fs = new FileStream(filePath, FileMode.Open); 57 58 byte[] bytes = new byte[(int)fs.Length]; fs.Read(bytes, 0, bytes.Length); 59 60 fs.Close(); 61 response.ContentType = "application/octet-stream"; 62 //通知浏览器下载文件而不是打开 63 response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8)); 64 response.BinaryWrite(bytes); 65 response.Flush(); 66 response.End(); 67 } 68 69 /// <summary> 70 /// 将文本作为某文件下载 71 /// </summary> 72 /// <param name="text"></param> 73 /// <param name="fileName"></param> 74 public static void DownloadText(string text , string fileName) 75 { 76 byte[] bytes = Encoding.Default.GetBytes(text); 77 var response = HttpContext.Current.Response; 78 response.ContentType = "application/octet-stream"; 79 //通知浏览器下载文件而不是打开 80 response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8)); 81 response.BinaryWrite(bytes); 82 response.Flush(); 83 response.End(); 84 }
from https://www.cnblogs.com/davidyang78/archive/2011/09/21/2183134.html
标签:asp,string,filePath,HttpContext,下载方式,filename,Current,net,response 来源: https://www.cnblogs.com/youmingkuang/p/13759318.html
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