Javascript與asp.net多檔案無重新整理上傳
Javascript與asp.net 實現Ajax多檔案無重新整理上傳這幾天在等著上班，閑來無事，就寫了一個無重新整理的上傳功能，這個上傳只是實現局部重新整理，我已經把方法都整理好，可以隨意添加多個上傳控制項，只要調用一個方法就可以了，為了便於閱讀我沒有把JS獨立出來，以後真正用到項目上的時候再提出來，我在每個方法上面都寫了注視，具體可以看代碼部分，現在一直在用JQuery，它提供的方法太好用的，剩了很多事。
此方法主要是通過iFrame調用上傳頁的控制項來實現的，具體請看下面的代碼。
無重新整理上傳主要的HTML代碼（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: 宋體, 黑體,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: 微軟雅黑,黑體,宋體,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");
};
//是否顯示上傳後的圖片
var isshowpic = true;
var uploadshowpic = function(el){
isshowpic = !(isshowpic);
if(isshowpic)
{
el.html("圖片顯示關閉");
}
else
{
el.html("圖片顯示開啟");
}
};
//載入中的GIF動畫
var loadingUrl = "images/ajax-loader.gif";
//選擇檔案後的事件,iframe裡面調用的
var uploading = function(imgsrc,itemid){
var el = $("#uploading"+itemid);
$("#ifUpload"+itemid).fadeOut("fast");
el.fadeIn("fast");
el.html("<img src='"+loadingUrl+"' align='absmiddle' /> 上傳中");
return el;
};
//重新上傳方法
var uploadinit = function(itemid){
currentItemID ++;
$("#uploading"+itemid).fadeOut("fast",function(){
$("#ifUpload"+itemid).fadeIn("fast");
$("#panelViewPic"+itemid).fadeOut("fast");
});
};
//上傳時程式發生錯誤時，給提示，並返回上傳狀態
var uploaderror = function(itemid){
alert("程式異常，"+itemid+"項上傳未成功。");
uploadinit();
};
//上傳成功後的處理
var uploadsuccess = function(newpath,itemid){
$("#uploading"+itemid).html("檔案上傳成功. <a href='javascript:void(0);' onclick='uploadinit("+itemid+");'>[重新上傳]</a>");
if(isshowpic)
{
$("#panelViewPic"+itemid).html("<a href='"+newpath+"' title='點擊查看大圖' target='_blank'><img src='"+newpath+"' alt='' style='width:300px;' /></a>");
$("#panelViewPic"+itemid).fadeIn("fast");
}
};
var currentItemID = 0; //用於存放共有多少個上傳控制項了
//建立一個上傳控制項
var uploadcreate = function(el,itemid){
currentItemID ++;
if(itemid == null)
{
itemid = currentItemID;
}
var strContent = "<div class='uploadcontrol'><iframe src=\"upload.aspx?id="+itemid+"\" id=\"ifUpload"+itemid+"\" frameborder=\"no\" scrolling=\"no\" style=\"width:400px; height:28px;\"></iframe>";
strContent += "<div class=\"uploading\" id=\"uploading"+itemid+"\" style=\"display:none;\" ></div>";
strContent += "<div class=\"image\" id=\"panelViewPic"+itemid+"\" style=\"display:none;\"></div></div>";
el.append(strContent);
};
</script>
</head>
<body>
<div id="tipbox" class="box tooltip">
<a href="#" onclick="hideDiv('tipbox');">[關閉]</a>
<div class="content">
<h1>AjaxUpload - 多檔案無重新整理上傳原始碼 v1.0</h1>
<p>作者:李華順 <a href="http://huacn.cnblogs.com" target="_blank">http://huacn.cnblogs.com</a></p>
</div>
</div>
<div id="toolbox" class="tooltip box">
<a href="#" onclick="uploadcreate($('#uploadbox'));">添加一個新上傳控制項</a> <a href="#" onclick="uploadshowpic($(this));">圖片顯示關閉</a>
</div>
<div id="uploadbox" class="box">
</div>
</body>
</html>上傳功能的頁面代碼（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>上傳</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>上傳功能的服務端代碼（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>");
}
}基本上就是這些，重點請看第一部份的代碼，主要是JS控制項顯示，還有一個重點是upload.aspx調用父級頁面的方法這些實現。
Javascript無重新整理上傳示範地址:http://www.wathon.com/opensource/js/ajaxuploadv1/upload.html
原始碼：http://www.wathon.com/opensource/js/ajaxuploadv1/ajaxupload_src.zip
無重新整理上傳在編輯框中的應用示範:http://files.cnblogs.com/huacn/ajaxupload_example.zip
Javascript與asp.net多檔案無重新整理上傳 - Huacn的日誌 - 部落格園
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