Jquery和BigFileUpload实现大文件上传及进度条显示

<script src="../../common/js/jquery-1.2.6.pack.js" type="text/javascript"></script> 
<script src="../../common/jqControl/packed/ui.core.packed.js" type="text/javascript"></script> 
<!--FORM--> 
<script src="../../common/jqControl/ajax/jquery.form.js" type="text/javascript"></script> 
<!--上传文件--> 
<script src="../../common/jqControl/upLoad/jquery.MultiFile.pack.js" type="text/javascript"></script> 
<!--进度条--> 
<script src="../../common/jqControl/packed/ui.progressbar.packed.js" type="text/javascript"></script> 
<!--对话框--> 
<!--我的JS --> 
<link href="../../common/Css/jquery-ui-themeroller.css" rel="stylesheet" type="text/css" /> 
<script src="../gadget/JS/uploadfile.js" type="text/javascript"> 

$(function() 
{ 
var info = '<div style="display:none" id="uploadinfo">'; 
info += '<p>正在上传: <span id="uploadfilename"></span></p>'; 
info += '<p>上传速度: <span id="uploadrate"></span> </p>'; 
info += '<p>状态: <span id="uploadtitle"></span></p>'; 
info += '<p>预计剩余时间: <span id="uploadlefttime"></span></p>'; 
info += '<p>上传文件大小: <span id="uploadtotal"></span></p>'; 
info += '<p>已上传大小: <span id="uploadcurrent"></span></p>'; 
info += '<p><div id="uploadprogressbar"></div></p>'; 
info += '</div><div id="dialogsucc" > '; 
$("body").append(info); 
//进度条 
$("#uploadprogressbar").progressbar(); 
//上传 
$('#fileupload').MultiFile(); 
$('#btshow').click(function() 
{ 
alert($("body").html()); 
}); 
//提交 
$('#btnsubmit').click(function() 
{ 
$("#uploadForm").ajaxSubmit( 
{ 
dataType: 'text', 
beforeSubmit: function(a,f,o) 
{ 
startProgress(); 
}, 
async:false, 
success: function(data) 
{ 
//$("#dialogsucc").text(data); 
//stopProgress(); 
if(data.succ==1) 
{ 
/* $("#dialogsucc").show(); 
$("#dialogsucc").dialog( 
{ 
modal: true, 
overlay: 
{ 
opacity: 0.5, 
background: "black" 
} 
}); */ 
} 
}, 
error:function(err) 
{ 
alert(err); 
} 
}); 
}); 
}); 
function getProgress(){ 
$.ajax({ 
type: "post", 
dataType:"json", 
url: "uploadProgress.aspx", 
data: "UploadID=" + $("#UploadID").val(), 
success: function(data){ 
$("#uploadprogressbar").progressbar("progress", data.percent); 
$("#uploadfilename").html(data.filename); 
$("#uploadrate").html(data.rate); 
$("#uploadtitle").html(data.info); 
$("#uploadlefttime").html(data.lefttime); 
$("#uploadtotal").html(data.total); 
$("#uploadcurrent").html(data.current); 
if(data.succ==-1){ 
alert(data.errmsg); 
} 
if (data.succ==0){ 
setTimeout("getProgress()", 1000); 
} 
if (data.succ==1){ 
return; 
} 
}, 
error:function(msg) 
{ 
alert(msg); 
} 
}); 
} 
function startProgress(){ 
$("#uploadinfo").show(); 
setTimeout("getProgress()", 500); 
} 
function stopProgress() 
{ 
$("#uploadinfo").hide(); 
} 

protected void Page_Load(object sender, EventArgs e) 
{ 
try 
{ 
string s = "{"; 
UploadContext upload = UploadContextFactory.GetUploadContext(Request["UploadID"]); 
//初始化 
if (upload.Status == uploadStatus.Initializing) 
{ 
s += responeJSON(upload, "0", ""); 
} 
if (upload.Status == uploadStatus.Uploading) 
{ 
s += responeJSON(upload, "0", ""); 
} 
if (upload.Status == uploadStatus.Complete) 
{ 
s += responeJSON(upload, "1", ""); 
} 
if (upload.Status == uploadStatus.HasError) 
{ 
s += responeJSON(upload, "-1", ""); 
} 
s += "}"; 
Response.Write(s); 
} 
catch (Exception err) 
{ 
//throw err; 
Response.Write("{'info':'" + err.Message.Replace("'", "") + "','succ':-1}"); 
} 
} 
private string responeJSON(UploadContext upload, string succ,string errmsg) 
{ 
string s = ""; 
s += "'info':'" + upload.FormatStatus + "'" ; 
s += ",'percent':'" + Convert.ToInt32((upload.Readedlength * 100.0 / upload.TotalLength)).ToString() + "'"; 
s += ",'current':'" + (upload.Readedlength/1024).ToString() + "KB'"; 
s += ",'total':'" + (upload.TotalLength/1024).ToString() + "KB'"; 
s += ",'rate':'" + upload.FormatRatio + "'"; 
s += ",'filename':'" + upload.CurrentFile + "'"; 
s += ",'cancel_upload':" + 0 ; 
s += ",'lefttime':'" + upload.LeftTime + "'"; 
s += ",'succ':" + succ; 
s += ",'errmsg':'" + errmsg +"'"; 
return s; 
}