//TransmitFile实现下载
protected void Button1_Click(object sender, EventArgs e)
{
/*
微软为Response东西供给了一个新的要领TransmitFile来解决使用Response.BinaryWrite
下载赶过400mb的文件时导致Aspnet_wp.exe进程回收而无法告成下载的问题。
代码如下：
*/
Response.ContentType = "application/x-zip-compressed";
string FileName = "test.doc";
//使用UTF-8对文件名进行编码
Response.AppendHeader("Content-Disposition", "attachment;filename=\"" + HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + "\"");
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment;filename=" + FileName);
string filename = Server.MapPath("../ReportTemplate/test.doc");
Response.TransmitFile(filename);
}
//WriteFile实现下载
protected void Button2_Click(object sender, EventArgs e)
{
/*
using System.IO;
*/
string fileName = "test.doc";//客户端生存的文件名
string filePath = Server.MapPath("../ReportTemplate/test.doc");//路径
FileInfo fileInfo = new FileInfo(filePath);
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.AddHeader("Content-Disposition", "attachment;filename=\"" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8) + "\"");
Response.AddHeader("Content-Length", fileInfo.Length.ToString());
Response.AddHeader("Content-Transfer-Encoding", "binary");
Response.ContentType = "application/octet-stream";
Response.WriteFile(fileInfo.FullName);
Response.Flush();
Response.End();
}
//WriteFile分块下载
protected void Button3_Click(object sender, EventArgs e)
{
string fileName = "test.doc";//客户端生存的文件名
string filePath = Server.MapPath("../ReportTemplate/test.doc");//路径
System.IO.FileInfo fileInfo = new System.IO.FileInfo(filePath);
if (fileInfo.Exists == true)
{
const long ChunkSize = 102400; //100K 每次读取文件，只读取100K，，这样可以缓解处事器的压力
byte[] buffer = new byte[ChunkSize];
Response.Clear();
System.IO.FileStream iStream = System.IO.File.OpenRead(filePath);
long dataLengthToRead = iStream.Length; //获取下载的文件总巨细
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition",
"attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
while (dataLengthToRead > 0 && Response.IsClientConnected)
{