jquery图片上传新思路
本文主要针对于上传多张图片时，要显示进度条但是表单窗口不够显示的情形。其解决方案如下：
1、在表单窗口添加能够显示上传成功图片的input 和上传图片按钮
2、点击图片上传按钮弹出div窗口；
3、div窗口iframe一个图片上传的页面，此页面采用html5对多张图片上传预览、显示上传进度等效果。
4、在图片接受后台代码中将上传成功的图片文件名或者图片服务器URL地址串写入到session;
5、在表单窗口中添加div窗口关闭方法，在此方法中实现通过ajax调用GetSerrion.ashx，
6、将返回的结果显示在input中。
表单页面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" dir="ltr"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Jquery教程演示:JavaScript弹出窗口DIV层效果代码--代码吾爱 </title> <link rel="stylesheet" href="general.css" type="text/css" media="screen" /> <script src="../js/JScript.js" type="text/javascript"></script> <script src="popup.js" type="text/javascript"></script> </head> <body> <center> <div id="button"><input type="submit" value="点击这里查看效果" /></div> </center> <div id="popupContact"> <a id="popupContactClose">x</a> <h1>图片上传窗口</h1> <iframe src="../MainPage/login.aspx" height="90%" width="100%" ></iframe> </div> <div id="backgroundPopup"></div> </body> </html>
表单js代码：
/***************************/
//@Author: Adrian "yEnS" Mato Gondelle
//@website: www.yensdesign.com
//@email: yensamg@gmail.com
//@license: Feel free to use it, but keep this credits please!
/***************************/
//SETTING UP OUR POPUP
//0 means disabled; 1 means enabled;
var popupStatus = 0;
//loading popup with jQuery magic!
function loadPopup(){
//loads popup only if it is disabled
if(popupStatus==0){
$("#backgroundPopup").css({
"opacity": "0.7"
});
$("#backgroundPopup").fadeIn("slow");
$("#popupContact").fadeIn("slow");
popupStatus = 1;
}
}
//disabling popup with jQuery magic!
function disablePopup(){
//disables popup only if it is enabled
if(popupStatus==1){
$("#backgroundPopup").fadeOut("slow");
$("#popupContact").fadeOut("slow");
popupStatus = 0;
$.ajax({
url:"GetSession.ashx?key=tupian",
async:false,
cache:false,
success:function(data){
alert(data);
},
error:function(data){
alert(data);
}
});
//alert("关闭了");
}
}
//centering popup
function centerPopup(){
//request data for centering
var windowWidth = document.documentElement.clientWidth;
var windowHeight = document.documentElement.clientHeight;
var popupHeight = $("#popupContact").height();
var popupWidth = $("#popupContact").width();
//centering
$("#popupContact").css({
"position": "absolute",
"top": windowHeight/2-popupHeight/2,
"left": windowWidth/2-popupWidth/2
});
//only need force for IE6
$("#backgroundPopup").css({
"height": windowHeight
});
}
//CONTROLLING EVENTS IN jQuery
$(document).ready(function(){
//LOADING POPUP
//Click the button event!
$("#button").click(function(){
//centering with css
centerPopup();
//load popup
loadPopup();
});
//CLOSING POPUP
//Click the x event!
$("#popupContactClose").click(function(){
disablePopup();
});
//Click out event!
$("#backgroundPopup").click(function(){
disablePopup();
});
//Press Escape event!
$(document).keypress(function(e){
if(e.keyCode==27 && popupStatus==1){
disablePopup();
}
});
});
接受图片后台代码：
<%@ WebHandler Language="C#" Class="Handler" %> using System; using System.Web; using System.Web.SessionState; public class Handler : IHttpHandler,IRequiresSessionState { public void ProcessRequest (HttpContext context) { context.Session["tupian"] = "1111"; } public bool IsReusable { get { return false; } } }
通过ajax读取图片信息：
<%@ WebHandler Language="C#" Class="GetSession" %> using System; using System.Web; using System.Web.SessionState; public class GetSession : IHttpHandler,IRequiresSessionState { public void ProcessRequest (HttpContext context) { context.Response.ContentType = "text/plain"; string value = ""; //context.Response.Write("Hello World"); if(context.Request.QueryString["key"]!=null) { string key=context.Request.QueryString["key"].ToString(); value= context.Session[key].ToString(); } context.Response.Write(value); } public bool IsReusable { get { return false; } } }
