Description:
4种ASP.NET文件下载//TransmitFile实现下载 protectedvoid Button1_Click(object sender, EventArgs e) {
Response.ContentType = "application/x-zip-compressed"; Response.AddHeader("Content-Disposition","attachment;filename=z.zip"); string filename = Server.MapPath("DownLoad/z.zip"); Response.TransmitFile(filename); }
//WriteFile实现下载 protectedvoid Button2_Click(object sender, EventArgs e) {
string fileName = "asd.txt";//客户端保存的文件名 string filePath =Server.MapPath("DownLoad/aaa.txt");//路径
FileInfo fileInfo = new FileInfo(filePath); Response.Clear(); Response.ClearContent(); Response.ClearHeaders(); Response.AddHeader("Content-Disposition", "attachment;filename=" +fileName); Response.AddHeader("Content-Length",fileInfo.Length.ToString()); Response.AddHeader("Content-Transfer-Encoding", "binary"); Response.ContentType = "application/octet-stream"; Response.ContentEncoding =System.Text.Encoding.GetEncoding("gb2312"); Response.WriteFile(fileInfo.FullName); Response.Flush(); Response.End(); }
//WriteFile分块下载 protectedvoid Button3_Click(object sender, EventArgs e) {
string fileName = "aaa.txt";//客户端保存的文件名 string filePath =Server.MapPath("DownLoad/aaa.txt");//路径
System.IO.FileInfo fileInfo = newSystem.IO.FileInfo(filePath);
if (fileInfo.Exists == true) { 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 byte[] buffer = new byte[ChunkSize];
Response.Clear(); System.IO.FileStream iStream =System.IO.File.OpenRead(filePath); long dataLengthToRead = iStream.Length;//获取下载的文件总大小 Response.ContentType = "application/octet-stream"; Response.AddHeader("Content-Disposition", "attachment; filename=" +HttpUtility.UrlEncode(fileName)); while (dataLengthToRead > 0&&Response.IsClientConnected) { int lengthRead = iStream.Read(buffer, 0,Convert.ToInt32(ChunkSize));//读取的大小 Response.OutputStream.Write(buffer, 0, lengthRead); Response.Flush(); dataLengthToRead = dataLengthToRead - lengthRead; } Response.Close(); } }
//流方式下载 protectedvoid Button4_Click(object sender, EventArgs e) { string fileName = "aaa.txt";//客户端保存的文件名 string filePath =Server.MapPath("DownLoad/aaa.txt");//路径
//以字符流的形式下载文件 FileStream fs = new FileStream(filePath, FileMode.Open); byte[] bytes = new byte[(int)fs.Length]; fs.Read(bytes, 0, bytes.Length); fs.Close(); Response.ContentType = "application/octet-stream"; //通知浏览器下载文件而不是打开 Response.AddHeader("Content-Disposition","attachment; filename=" +HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8)); Response.BinaryWrite(bytes); Response.Flush(); Response.End();
}
转载于:https://www.cnblogs.com/liyuxin/archive/2011/07/19/2110998.html
