有时项目中需要一个文件批量上传功能时,个人认为uploadify是快速简便的解决方案,分享给大家供大家参考,具体如下
先上效果图:
具体代码如下:
在页面中如下
完整页面代码
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>文件批量上传Demo</title>
<!--引入Jquery-->
<script src="js/jquery-1.11.3.min.js"></script>
<!--引入uploadify-->
<script type="text/javascript" src="uploadify/jquery.uploadify.js"></script>
<link type="text/css" href="uploadify/uploadify.css" rel="stylesheet" />
<script type="text/javascript">
$(function () {
var guid = '<%=Request["guid"] %>';
var type = '<%=Request["type"] %>';
if (guid == null || guid == "") {
guid = newGuid();
}
if (type != null) {
type = type + '/';
}
$('#file_upload').uploadify({
'swf': 'uploadify/uploadify.swf', //FLash文件路径
'buttonText': '浏 览', //按钮文本
'uploader': 'uploadhandler.ashx?guid=' + guid, //处理ASHX页面
'formData': { 'folder': 'picture', 'isCover': 1 }, //传参数
'queueID': 'fileQueue', //队列的ID
'queueSizeLimit': 10, //队列最多可上传文件数量,默认为999
'auto': false, //选择文件后是否自动上传,默认为true
'multi': true, //是否为多选,默认为true
'removeCompleted': true, //是否完成后移除序列,默认为true
'fileSizeLimit': '0', //单个文件大小,0为无限制,可接受KB,MB,GB等单位的字符串值
'fileTypeDesc': 'All Files', //文件描述
'fileTypeExts': '*.*', //上传的文件后缀过滤器
'onQueueComplete': function (queueData) { //所有队列完成后事件
alert("上传完毕!");
},
'onError': function (event, queueId, fileObj, errorObj) {
alert(errorObj.type + ":" + errorObj.info);
},
'onUploadStart': function (file) {
},
'onUploadSuccess': function (file, data, response) { //一个文件上传成功后的响应事件处理
//var data = $.parseJSON(data);//如果data是json格式
//var errMsg = "";
}
});
});
function newGuid() {
var guid = "";
for (var i = 1; i <= 32; i++) {
var n = Math.floor(Math.random() * 16.0).toString(16);
guid += n;
if ((i == 8) || (i == 12) || (i == 16) || (i == 20))
guid += "-";
}
return guid;
}
//执行上传
function doUpload() {
$('#file_upload').uploadify('upload', '*');
}
</script>
</head>
<body>
<form id="form1" runat="server" enctype="multipart/form-data">
<div id="fileQueue" class="fileQueue"></div>
<div>
<input type="file" name="file_upload" id="file_upload" />
<p>
<input type="button" class="shortbutton" id="btnUpload" onclick="doUpload()" value="上传" />
<input type="button" class="shortbutton" id="btnCancelUpload" onclick="$('#file_upload').uploadify('cancel')" value="取消" />
</p>
<div id="div_show_files"></div>
</div>
</form>
</body>
</html>
UploadHandler.ashx代码:
using System;
using System.Web;
using System.IO;
public class UploadHandler : IHttpHandler {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
context.Request.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
context.Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
context.Response.Charset = "UTF-8";
if (context.Request.Files.Count > 0)
{
#region 获取上传路径
string uploadFolder = GetUploadFolder();
#endregion
if (System.IO.Directory.Exists(uploadFolder))
{//如果上传路径存在
HttpPostedFile file = context.Request.Files["Filedata"];
string filePath = Path.Combine(uploadFolder, file.FileName);
file.SaveAs(filePath);
context.Response.Write("0");
}
else
{
context.Response.Write("2");
}
}
}
public bool IsReusable {
get {
return false;
}
}
/// <summary>
/// 返回不带后缀的文件名
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
public static string GetFirstFileName(string fileName)
{
return Path.GetFileNameWithoutExtension(fileName);
}
/// <summary>
/// 获取上传目录
/// </summary>
/// <returns></returns>
public static string GetUploadFolder()
{
string rootPath = HttpContext.Current.Server.MapPath("~");
return Path.Combine(rootPath, "test");
}
}
文件上传.NET默认有大小限制,像IIS限制的30M默认请求大小。如果不想修改IIS,又想突破这个大小的限制,比如上传1GB大小的文件。
这是修改Web.config即可实现。
<?xml version="1.0" encoding="utf-8"?>
<!--
-->
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0" />
<httpRuntime maxRequestLength="1073741824"/>
</system.web>
<!--用于设置文件上传的最大允许大小(单位:bytes)-->
<system.webServer>
<security>
<requestFiltering>
<!--修改服务器允许最大长度(1GB)-->
<requestLimits maxAllowedContentLength="1073741824"/>
</requestFiltering>
</security>
</system.webServer>
</configuration>
希望本文所述对大家学习javascript程序设计有所帮助。