asp.net使用jQuery Uploadify上传附件示例

Uploadify是JQuery的一个上传插件，实现的效果非常不错，带进度显示。Uploadify官方网址：http://www.uploadify.com/，在MVC中使用的方法可以参考 jQuery Uploadify在ASP.NET MVC3中的使用和 Asp.net Mvc中使用uploadify实现图片缩放保存。

本文是一个简单的介绍Demo，主要是动态传递参数方法：通过formdata 向处理程序传递额外的表单数据：
复制代码代码如下:
<！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></title>
    <link href="uploadify/uploadify.css" type="text/css" rel="Stylesheet" />
    <script type="text/javascript" src="uploadify/jquery-1.7.2.min.js"></script>
    <script type="text/javascript" src="uploadify/swfobject.js"></script>
    <script type="text/javascript" src="uploadify/jquery.uploadify.min.js"></script>
    <script type="text/javascript">

        $（function （） {
            var taskId = "<%= TaskID %>";
            var activityId = "<%= ActivityId %>";
            var userId = "<%= GetCurrentLoginUser（）.ID %>";

            $（"#<%=FileUpload1.ClientID %>"）.uploadify（
            {
                "swf": "uploadify/uploadify.swf",
                "uploader": "UploadHandler.aspx",
                "auto": false,
                "method": "post",
                "multi": true,
                "buttonText": "浏览",
                "buttonImg": "uploadify/browse.jpg",
                "folder": "../uploadfile",
                "fileDesc": "附件",
                "onUploadStart": function （event, data） { //this is where you will send the form //data, but remember to get if from post in the .ashx file, by contex.Request["gallaryId"]
                    $（"#<%=FileUpload1.ClientID %>"）.uploadify（"settings", "formData",
                          { "taskId": taskId, "activityId": activityId, "userId": userId, "secInfo": $（"#<%=ddlsecInfo.ClientID %>"）.val（）} //note hiddenGallaryId would //have the gallaryId which im sending through post , make sure it is rendered in your page（ //i.e.not concealed by a multiview control e.t.c）
             ）;
                }

            }）;
        }）;
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <asp:FileUpload ID="FileUpload1" runat="server" />
    <asp:DropDownList ID="ddlsecInfo" runat="server">
        <asp:ListItem Text="公开" Value="1"> </asp:ListItem>
        <asp:ListItem Text="普通" Value="2"> </asp:ListItem>
        <asp:ListItem Text="机密" Value="3"> </asp:ListItem>
    </asp:DropDownList>
    <a href="javascript: $（"#<%=FileUpload1.ClientID %>"）.uploadify（"upload","*"）">上传</a>
    <a href="javascript:$（"#<%=FileUpload1.ClientID %>"）.uploadify（"cancel","*"）">取消上传</a>
    </form>
</body>
</html>