点击文件下载而不在浏览器中打开
download.aspx
<%@ Page language="c#" Codebehind="download.aspx.cs" AutoEventWireup="false" Inherits="ZKSTAT.Common.download" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>download</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
</form>
</body>
</HTML>
download.cs
using System;
using System.IO;
using System.Web;
using System.Web.UI;
namespace ZKSTAT.Common
{
/// <summary>
/// download 的摘要说明。
/// </summary>
public class download : System.Web.UI.Page
{
private void Page_Load(object sender, EventArgs e)
{
// 在此处放置用户代码以初始化页面
string path = Request.Params["download"];
if(path == null) return;
Stream stream = null; // Buffer to read 10K bytes in chunk:
byte[] buffer = new Byte[10240];
// Length of the file:
int length;
// Total bytes to read:
long dataToRead;
// Identify the file to download including its path.
string path2 = Request.PhysicalPath;
path2 = path2.Substring ( 0,path2.LastIndexOf ( "Common\\" ) );
string filepath = path2 +"UploadFile/Files/" + path;
//filepath = Server.MapPath ( filepath );
// Identify the file name.
string filename = Path.GetFileName(filepath);
try
{
// Open the file.
stream = new FileStream(filepath, FileMode.Open,
FileAccess.Read,FileShare.Read);
Response.Clear();
// Total bytes to read:
dataToRead = stream.Length;
long p = 0;
if(Request.Headers["Range"]!=null)
{
Response.StatusCode = 206;
p = long.Parse( Request.Headers["Range"].Replace("bytes=","").Replace("-",""));
}
if(p != 0)
{
Response.AddHeader("Content-Range","bytes " + p.ToString() + "-" + ((long)(dataToRead - 1)).ToString() + "/" + dataToRead.ToString());
}
Response.AddHeader("Content-Length",((long)(dataToRead-p)).ToString());
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(Request.ContentEncoding.GetBytes(filename)));
stream.Position = p;
dataToRead = dataToRead - p;
// Read the bytes.
while (dataToRead > 0)
{
// Verify that the client is connected.
if (Response.IsClientConnected)
{
// Read the data in buffer.
length = stream.Read(buffer, 0, 10240);
// Write the data to the current output stream.
Response.OutputStream.Write(buffer, 0, length);
// Flush the data to the HTML output.
Response.Flush();
buffer= new Byte[10240];
dataToRead = dataToRead - length;
}
else
{
//prevent infinite loop if user disconnects
dataToRead = -1;
}
}
}
catch (Exception ex)
{
// Trap the error, if any.
Response.Write("错误 : " + ex.Message);
}
finally
{
if (stream != null)
{
//Close the file.
stream.Close();
}
Response.End();
}
}
Web 窗体设计器生成的代码
}
}
<%@ Page language="c#" Codebehind="download.aspx.cs" AutoEventWireup="false" Inherits="ZKSTAT.Common.download" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ><HTML> <HEAD> <title>download</title> <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> </HEAD> <body MS_POSITIONING="GridLayout"> <form id="Form1" method="post" runat="server"> </form> </body></HTML>using System;using System.IO;using System.Web;using System.Web.UI;namespace ZKSTAT.Common{ /// <summary> /// download 的摘要说明。 /// </summary> public class download : System.Web.UI.Page { private void Page_Load(object sender, EventArgs e) { // 在此处放置用户代码以初始化页面 string path = Request.Params["download"]; if(path == null) return; Stream stream = null; // Buffer to read 10K bytes in chunk: byte[] buffer = new Byte[10240]; // Length of the file: int length; // Total bytes to read: long dataToRead; // Identify the file to download including its path. string path2 = Request.PhysicalPath; path2 = path2.Substring ( 0,path2.LastIndexOf ( "Common\\" ) ); string filepath = path2 +"UploadFile/Files/" + path; //filepath = Server.MapPath ( filepath ); // Identify the file name. string filename = Path.GetFileName(filepath); try { // Open the file. stream = new FileStream(filepath, FileMode.Open, FileAccess.Read,FileShare.Read); Response.Clear(); // Total bytes to read: dataToRead = stream.Length; long p = 0; if(Request.Headers["Range"]!=null) { Response.StatusCode = 206; p = long.Parse( Request.Headers["Range"].Replace("bytes=","").Replace("-","")); } if(p != 0) { Response.AddHeader("Content-Range","bytes " + p.ToString() + "-" + ((long)(dataToRead - 1)).ToString() + "/" + dataToRead.ToString()); } Response.AddHeader("Content-Length",((long)(dataToRead-p)).ToString()); Response.ContentType = "application/octet-stream"; Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(Request.ContentEncoding.GetBytes(filename))); stream.Position = p; dataToRead = dataToRead - p; // Read the bytes. while (dataToRead > 0) { // Verify that the client is connected. if (Response.IsClientConnected) { // Read the data in buffer. length = stream.Read(buffer, 0, 10240); // Write the data to the current output stream. Response.OutputStream.Write(buffer, 0, length); // Flush the data to the HTML output. Response.Flush(); buffer= new Byte[10240]; dataToRead = dataToRead - length; } else { //prevent infinite loop if user disconnects dataToRead = -1; } } } catch (Exception ex) { // Trap the error, if any. Response.Write("错误 : " + ex.Message); } finally { if (stream != null) { //Close the file. stream.Close(); } Response.End(); } } Web 窗体设计器生成的代码 }}