Asp.Net 文件下载1——流下载（适用于大文件且防盗链）（转）

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使用流防盗链下载大文件

直接上 Asp.net 后置代码好了

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO; public partial class FileDownload_Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{ } //以流方式下载文件，适合大文件
protected void btn_down_Click(object sender, EventArgs e)
{
try
{
//设置文件名
Response.AddHeader("Content-Disposition", "attachment; filename=test.jpg");
Response.ContentType = "application/octet-stream"; //设置下载文件的服务器路径
String filePath = "~/FileDownload/test.jpg"; //输出到流
FileStream stream = new FileStream(Server.MapPath(filePath), FileMode.Open, FileAccess.Read, FileShare.Read);
BinaryReader reader = new BinaryReader (stream); Response.Clear();
while (true)
{
byte [] bt = reader.ReadBytes();
Response.OutputStream.Write(bt,,);
if(bt.Length<)
break;
}
reader.Close();
stream.Dispose();
Response.End();
}
catch(Exception ex)
{
this.ClientScript.RegisterStartupScript(this.GetType(),"new","<mce:script type="text/javascript"></mce:script>");
}
}
}