jdownload.aspx代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="jdownload.aspx.cs" Inherits="Scripts.jdownload.jDownload" %>
jdownload.aspx.cs
using System;
namespace Scripts.jdownload
{
public partial class jDownload : System.Web.UI.Page
{
string[,] mime_types ={{"pdf", "application/pdf"},{"txt","text/plain"},{"html","text/html"},
{"htm","text/html"},{"zip","application/zip"},{"doc","application/msword"},{"docx","application/msword"},
{"xls","application/vnd.ms-excel"},{"xlsx","application/vnd.ms-excel"},{"ppt","application/vnd.ms-powerpoint"},
{"gif","image/gif"},{"png","image/png"},{"jpeg","image/jpg"},{"jpg","image/jpg"},{"rar","application/octet-stream"}};
string ext = null;
string path = null;
string action = null;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
action = Request["action"];//download or info
path = Request["path"];//file to be downloaded
if (action != null && path != null && action.Length > 0 && path.Length > 0)
{
string absPath = Server.MapPath("~/" + path);// +"\\" + path.Replace("/", @"\");
System.IO.FileInfo fi = new System.IO.FileInfo(absPath);
if (fi.Exists)
{
ext = fi.Extension.Replace(".", "");
bool bKnownExt = false;
string contentType = "application/force-download";
for (int i = 0; i < mime_types.Length; i++)
{
if (ext.ToLower().Equals(mime_types[i, 0]))
{
bKnownExt = true;
contentType = mime_types[i, 1];
break;
}
}
if (!bKnownExt)
{
Response.Write("{\"error\":\"unknown file type.\"}");
Response.End();
}
if (action.Equals("download"))
{ GetFile(absPath, contentType, fi.Length); }
else
{ GetInfo(fi.Name, ext, fi.Length); }
}
else
{
Response.Write("{\"error\":\"File Not Exists.\"}");
Response.End();
}
}
else
{
Response.Write("{\"error\":\"Empty Param.\"}");
Response.End();
}
}
else
{
Response.Write("{\"error\":\"No repeat.\"}");
Response.End();
}
}
private void GetFile(string filePath, string contentType, long fileSize)
{
Response.ClearContent();
Response.AddHeader("Pragma", "public");
Response.AddHeader("Expires", "0");
Response.AddHeader("Cache-Control", "must-revalidate, pre-check=0");
Response.AddHeader("Content-Disposition", "attachment; filename=" + path);
Response.AddHeader("Content-Type", contentType);
Response.AddHeader("Content-Transfer-Encoding", "binary");
Response.AddHeader("Content-Length", fileSize.ToString());
Response.TransmitFile(filePath);
}
private void GetInfo(string fileName, string extension, long fileSize)
{
Response.Write("{\"filename\":\"" + Microsoft.JScript.GlobalObject.escape(fileName) + "\",\"filetype\":\"" + Microsoft.JScript.GlobalObject.escape(extension) + "\",\"filesize\":" + (fileSize / 1024).ToString() + "}");
}
}
}
jquery.jdownload.css
.jDownloadDialog {
font-size: 14px;
padding-top: 20px;
}
.jDownloadDialog .jDownloadInfo {
margin-top: 20px;
font-size: 12px;
}
.jDownloadDialog p {
margin: 10px 0;
width: 100%;
}
.jDownloadDialog .jDownloadInfo p span {
font-weight: bold;
width: 20%;
display: inline-block;
}
.jDownloadDialog .jDownloadError {
color: #dd0000;
}
jquery.jdownload.js
/*
* jDownload - A jQuery plugin to assist file downloads
* Examples and documentation at: http://jdownloadplugin.com
* Version: 1.3 (18/11/2010)
* Copyright (c) 2010 Adam Chambers, Tim Myers
* Licensed under the GNU General Public License v3: http://www.gnu.org/licenses/gpl.html
* Requires: jQuery v1.4+ & jQueryUI 1.8+
*/
//update wxf
function GetUrl(path) {
var dialog = $("#jDowndialog"); // set dialog options
dialog.dialog({
autoOpen: false,
buttons: {
"Cancel": function () {
$(this).dialog('close');
},
"Download": function () {
start_download(path);
$(this).dialog('close');
}
},
width: 400,
height: 300,
modal: true,
close: null
});
dialog.html("");
// if filePath is not specified then use the href attribute
var filePath = path;
dialog.html('<p>Fetching File Info...</p><img src="../Scripts/jdownload/loader.gif" alt="Loading" />');
$.ajax({
type: 'POST',
url: '../Scripts/jdownload/jdownload.aspx',
data: 'action=download&path=' + filePath,
error: function (XMLHttpRequest, textStatus, errorThrown) {
dialog.html("<p class=\"jDownloadError\">Fatal Error.</p>");
},
success: function (data) {
//setTimeout(function() {
var jsonData={};
try {
jsonData = JSON.parse(data);
} catch(e) {
}
if (jsonData.error) {
dialog.html("<p class=\"jDownloadError\">" + jsonData.error + "</p>");
} else {
var url = '../Scripts/jdownload/jdownload.aspx?action=info&path=' + filePath;
// get file information
$.getJSON(url, function (filedata) {
// Check to see if file is not allowed
if (filedata.error == 'denied') {
// append new file info
dialog.html('<p class=\"jDownloadError\">This file type is not allowed.</p>');
} else {
// parse JSON
var html = "<div class=\"jDownloadInfo\">";
html += "<p><span>File Name:</span> " + decodeURI(filedata.filename) + "</p>";
html += "<p><span>File Type:</span> " + filedata.filetype + "</p>";
html += "<p><span>File Size:</span> " + ((filedata.filesize == "0") ? "<1" : filedata.filesize) + " KB</p>";
html += "</div>";
// remove any old file info & error messages
$('.jDownloadInfo, .jDownloadError').remove();
var desc = 'Download the file now?';
// append new file info
dialog.html('<p>' + desc + '</p>' + html);
}
});
}
//}, 200);
}
});
// open dialog
dialog.data('jDownloadData', { filePath: filePath }).dialog('open');
return false;
};
function start_download(path) {
$("#iframeDown").attr('src', '../Scripts/jdownload/jdownload.aspx?action=download&path=' + path);
return false;
}
$(function () {
var iframe = '<iframe id="iframeDown" class="jDownloadFrame" width="0" height="0" src="" style="visibility: hidden;"></iframe>';
$(iframe).appendTo("body");
var dialogHTML = '<div class="jDownloadDialog" title="DownLoad" id="jDowndialog"></div>';
var dialog = $(dialogHTML).appendTo("body");
});
