Response.ContentType = "application/x-zip-compressed";
Response.AddHeader("Content-Disposition", "attachment;filename=keji.rar");
string filename = Server.MapPath("keji.rar");
Response.TransmitFile(filename);
Response.Write("");
protected void Button1_Click(object sender, EventArgs e)
{
![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
Code
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protected void Button1_Click(object sender, EventArgs e)
2![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
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//TransmitFile实现下载
4![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
5![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//*
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微软为Response对象提供了一个新的方法TransmitFile来解决使用Response.BinaryWrite
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下载超过400mb的文件时导致Aspnet_wp.exe进程回收而无法成功下载的问题。
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代码如下:
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*/
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Response.ContentType = "application/x-zip-compressed";
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Response.AddHeader("Content-Disposition", "attachment;filename=keji.rar");
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string filename = Server.MapPath("keji.rar");
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Response.TransmitFile(filename);
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Response.Write("<script language=\"javascript\" type=\"text/javascript\">");
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Response.Write("alert(\"下载成功\");");
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Response.Write("window.location.href=\"C_SC.aspx\";");
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Response.Write("</script>");
19![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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}
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protected void Button2_Click(object sender, EventArgs e)
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{
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//WriteFile实现下载
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string fileName = "ceshi.rar";//客户端保存的文件名
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string filePath = Server.MapPath("keji.rar");//路径
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FileInfo fileInfo = new FileInfo(filePath);
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Response.Clear();
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Response.ClearContent();
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Response.ClearHeaders();
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Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
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Response.AddHeader("Content-Length", fileInfo.Length.ToString());
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Response.AddHeader("Content-Transfer-Encoding", "binary");
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Response.ContentType = "application/octet-stream";
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Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
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Response.WriteFile(fileInfo.FullName);
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Response.Flush();
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Response.End();
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}
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protected void Button3_Click(object sender, EventArgs e)
43![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
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//WriteFile分块下载
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string fileName = "GhostXP.iso";//客户端保存的文件名
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string filePath = Server.MapPath("GhostXP7.7.iso");//路径
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System.IO.FileInfo fileInfo = new System.IO.FileInfo(filePath);
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if (fileInfo.Exists == true)
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{
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const long ChunkSize = 409600;//100K 每次读取文件,只读取100K,这样可以缓解服务器的压力
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byte[] buffer = new byte[ChunkSize];
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Response.Clear();
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System.IO.FileStream iStream = System.IO.File.OpenRead(filePath);
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long dataLengthToRead = iStream.Length;//获取下载的文件总大小
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Response.ContentType = "application/octet-stream";
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Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName));
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while (dataLengthToRead > 0 && Response.IsClientConnected)
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{
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int lengthRead = iStream.Read(buffer, 0, Convert.ToInt32(ChunkSize));//读取的大小
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Response.OutputStream.Write(buffer, 0, lengthRead);
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Response.Flush();
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dataLengthToRead = dataLengthToRead - lengthRead;
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}
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Response.Close();
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}
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}
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//字符流方式下载文件
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protected void Button4_Click(object sender, EventArgs e)
74![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
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string fileName = "ce2.rar";//客户端保存的文件名
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string filePath = Server.MapPath("keji.rar");//路径
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//以字符流的形式下载文件
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FileStream fs = new FileStream(filePath, FileMode.Open);
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byte[] bytes = new byte[(int)fs.Length];
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fs.Read(bytes, 0, bytes.Length);
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fs.Close();
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Response.ContentType = "application/octet-stream";
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//通知浏览器下载文件而不是打开
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Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
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Response.BinaryWrite(bytes);
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Response.Flush();
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Response.End();
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}