Javascript与asp.net 实现Ajax多文件无刷新上传-heycode-嘿！代码。a

这几天在等着上班，闲来无事，就写了一个无刷新的上传功能，这个上传只是实现局部刷新，我已经把方法都整理好，可以随意添加多个上传控件，只要调用一个方法就可以了，为了便于阅读我没有把JS独立出来，以后真正用到项目上的时候再提出来，我在每个方法上面都写了注视，具体可以看代码部分，现在一直在用JQuery，它提供的方法太好用的，剩了很多事。
此方法主要是通过iFrame调用上传页的控件来实现的，具体请看下面的代码。

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无刷新上传主要的HTML代码（upload.html）：

<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
<html xmlns=”http://www.w3.org/1999/xhtml”>

<head>
<title>AjaxUpload</title>
<meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″ />
<script type=”text/javascript” src=”scripts/jquery.js”></script>
<script type=”text/javascript” src=”scripts/interface.js”></script>
<style type=”text/css” media=”all”>
*{
margin:0;
padding:0;
}

img{border:none;}

ul{
list-style-type:none;
}

ul li{
padding:2px 4px;
}

body{
font-family: 宋体, 黑体,verdana, Arial;
font-size:12px;
color:#333;
background:#DDDDDD;
margin:30px;
padding:0;
}

.box{
border:1px solid #CCC;
background:#FFF;
padding:8px;
margin:5px;
clear:both;
}

.title {
background:#F0F0F0;padding:5px;
font-weight:bold;
}

.tooltip{
background:#F0F0F0;
border-color:#bbb;
}

.tooltip h1 {
color:#A8DF00;
font-family: 微软雅黑,黑体,宋体,verdana, Arial;
}

.titlebutton{
float:right;
}

.uploading{
background:#FFF;
color:#444;
text-align:left;
width:500px;
padding:4px;
}

.image{
border:1px solid #ddd;
margin:2px;
padding:1px;
display:inline;
width:300px;
}

.uploadcontrol {
margin:4px 0;
border-bottom:1px solid #F0F0F0;
}
</style>
<script type=”text/javascript”>

(document).ready(function(){
for(var i=0;i<5;i++)
{
uploadcreate((“#uploadbox”),i);
}
});

var hideDiv = function(idName){
(“#”+idName).fadeOut(“fast”);
};

//是否显示上传后的图片
var isshowpic = true;
var uploadshowpic = function(el){
isshowpic = !(isshowpic);
if(isshowpic)
{
el.html(“图片显示关闭”);
}
else
{
el.html(“图片显示开启”);
}
};

//载入中的GIF动画
var loadingUrl = “images/ajax-loader.gif”;

//选择文件后的事件,iframe里面调用的
var uploading = function(imgsrc,itemid){
var el = (“#uploading”+itemid);
(“#ifUpload”+itemid).fadeOut(“fast”);
el.fadeIn(“fast”);
el.html(“<img src=’”+loadingUrl+”‘ align=’absmiddle’ /> 上传中”);
return el;
};

//重新上传方法
var uploadinit = function(itemid){
currentItemID ++;
(“#uploading”+itemid).fadeOut(“fast”,function(){
(“#ifUpload”+itemid).fadeIn(“fast”);
(“#panelViewPic”+itemid).fadeOut(“fast”);
});

};

//上传时程序发生错误时，给提示，并返回上传状态
var uploaderror = function(itemid){
alert(“程序异常，”+itemid+”项上传未成功。”);
uploadinit();
};

//上传成功后的处理
var uploadsuccess = function(newpath,itemid){
(“#uploading”+itemid).html(“文件上传成功. <a href=’javascript：void(0);’ onclick=’uploadinit(“+itemid+”);’>[重新上传]</a>”);
if(isshowpic)
{
(“#panelViewPic”+itemid).html(“<a href=’”+newpath+”‘ title=’点击查看大图’ target=’_blank’><img src=’”+newpath+”‘ alt=” style=’width:300px;’ /></a>”);
(“#panelViewPic”+itemid).fadeIn(“fast”);
}
};

var currentItemID = 0; //用于存放共有多少个上传控件了
//创建一个上传控件
var uploadcreate = function(el,itemid){
currentItemID ++;
if(itemid == null)
{
itemid = currentItemID;
}
var strContent = “<div class=’uploadcontrol’><iframe src=\\”upload.aspx?id=”+itemid+”\\” id=\\”ifUpload”+itemid+”\\” frameborder=\\”no\\” scrolling=\\”no\\” style=\\”width:400px; height:28px;\\”></iframe>”;
strContent += “<div class=\\”uploading\\” id=\\”uploading”+itemid+”\\” style=\\”display:none;\\” ></div>”;
strContent += “<div class=\\”image\\” id=\\”panelViewPic”+itemid+”\\” style=\\”display:none;\\”></div></div>”;
el.append(strContent);
};

</script>

</head>

<body>

<div id=”tipbox” class=”box tooltip”>
<a href=”#” onclick=”hideDiv(‘tipbox’);”>[关闭]</a>
<div class=”content”>
<h1>AjaxUpload – 多文件无刷新上传源代码 v1.0</h1>
<p>作者:李华顺 <a href=”http://huacn.cnblogs.com” target=”_blank”>http://huacn.cnblogs.com</a></p>
</div>
</div>
<div id=”toolbox” class=”tooltip box”>
<a href=”#” onclick=”uploadcreate((‘#uploadbox’));”>添加一个新上传控件</a> <a href=”#” onclick=”uploadshowpic((this));”>图片显示关闭</a>
</div>
<div id=”uploadbox” class=”box”>

</div>

</body>

</html>

上传功能的页面代码（upload.aspx）：

<%@ Page Language=”C#” AutoEventWireup=”true” CodeFile=”upload.aspx.cs” Inherits=”upload” %>

<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>

<html xmlns=”http://www.w3.org/1999/xhtml” >
<head runat=”server”>
<title>上传</title>
<meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″ />
<script type=”text/javascript” src=”scripts/jquery.js”></script>
<script type=”text/javascript” src=”scripts/interface.js”></script>
<style type=”text/css”>
*{ margin:0; padding:0; }

</style>
<script type=”text/javascript”>

var uploadSelect = function(el){
el.fadeOut(“show”);
parent.uploading(document.getElementById(“<%=file1.ClientID %>”).value,’<%=itemID %>’);
(“#<%=frmUpload.ClientID %>”).submit();
};

</script>
</head>
<body>
<form runat=”server” id=”frmUpload” method=”post” enctype=”multipart/form-data”>
<input type=”file” runat=”server” id=”file1″ size=”40″ onchange=”uploadSelect((this));” />
</form>
</body>
</html>

上传功能的服务端代码（upload.aspx.cs）

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 upload : System.Web.UI.Page
{
string picPath = “”;
string picServer = “/upload”;
protected string itemID = “”;
protected void Page_Load(object sender, EventArgs e)
{

if (Request.QueryString["id"] != null)
{
itemID = Request.QueryString["id"];
}

if (IsPostBack)
{
picPath = Server.MapPath(“\\\\upload”);
doUpload();
}
}

protected void doUpload()
{
try
{
HttpPostedFile file = file1.PostedFile;
string strNewPath = GetSaveFilePath() + GetExtension(file.FileName);
file.SaveAs(picPath+strNewPath);
string urlPath = picServer + strNewPath;
urlPath = urlPath.Replace(“\\\\”, “/”);
WriteJs(“parent.uploadsuccess(‘” + urlPath + “‘,’” + itemID + “‘); “);

}
catch (Exception ex)
{
WriteJs(“parent.uploaderror();”);
}
}

private string GetExtension(string fileName)
{
try
{
int startPos = fileName.LastIndexOf(“.”);
string ext = fileName.Substring(startPos, fileName.Length – startPos);
return ext;
}
catch (Exception ex)
{
WriteJs(“parent.uploaderror(‘” + itemID + “‘);”);
return string.Empty;
}
}

private string GetSaveFilePath()
{
try
{
DateTime dateTime = DateTime.Now;
string yearStr = dateTime.Year.ToString(); ;
string monthStr = dateTime.Month.ToString();
string dayStr = dateTime.Day.ToString();
string hourStr = dateTime.Hour.ToString();
string minuteStr = dateTime.Minute.ToString();
string dir = dateTime.ToString(@”\\\\yyyyMMdd”);
if (!Directory.Exists(picPath + dir))
{
Directory.CreateDirectory(picPath + dir);
}
return dir + dateTime.ToString(“\\\\\\\\yyyyMMddhhmmssffff”);
}
catch (Exception ex)
{
WriteJs(“parent.uploaderror();”);
return string.Empty;
}
}

protected void WriteJs(string jsContent)
{
this.Page.RegisterStartupScript(“writejs”,”<script type=’text/javascript’>”+ jsContent+”</script>”);
}

}

基本上就是这些，重点请看第一部份的代码，主要是JS控件显示，还有一个重点是upload.aspx调用父级页面的方法这些实现。

Javascript无刷新上传演示地址:http://www.wathon.com/opensource/js/ajaxuploadv1/upload.html
源代码下载地址：http://www.wathon.com/opensource/js/ajaxuploadv1/ajaxupload_src.zip
无刷新上传在编辑框中的应用演示:http://www.cnblogs.com/Files/huacn/ajaxupload_example.zip

来源：huacn的cnblogs