Uploadify在asp.net下使用Demo

浏览数：45 / 时间：2015年06月09日

为了使自己以后不再去网上搜索，特记录下来

从uploadify官网http://www.uploadify.com/上下载文件

必要的文件：

1、jquery的js文件

2、jquery.uploadify.min.js

3、uploadify.css

4、uploadify.swf

页面的完整代码：

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script src="scripts/jquery.min.js" type="text/javascript"></script>
    <script src="scripts/uploadify/jquery.uploadify.min.js" type="text/javascript"></script>
    <link rel="stylesheet" type="text/css" href="scripts/uploadify/uploadify.css">
    <style type="text/css">
    body {
	    font: 13px Arial, Helvetica, Sans-serif;
    }
    .uploadify-button {
            background-color: transparent;
            border: none;
            padding: 0;
        }
    .uploadify:hover .uploadify-button {
        background-color: transparent;
    }
    </style>
</head>

<body>
	<h1>Uploadify在asp.net下使用Demo</h1>
	<form>
		<div id="queue"></div>
		<input id="file_upload" name="file_upload" type="file" multiple="true">
	</form>

	<script type="text/javascript">
		$(function() {
		    $(‘#file_upload‘).uploadify({
		        ‘buttonText‘: ‘选择文件‘,
		        ‘buttonImage‘: ‘scripts/uploadify/browse-btn.png‘,  //按钮使用图片
		        //‘buttonClass‘:‘custom-class‘,
                //‘height‘:20,
                //‘width‘:20,
		        //‘formData‘: { ‘submitType‘: ‘image‘, ‘studentId‘: studentId, ‘taskId‘: taskId },
		        ‘removeTimeout‘: 1, //进度条消失秒数
		        ‘fileTypeDesc‘: ‘图片文件‘,
		        ‘fileTypeExts‘: ‘*.jpg; *.jpeg; *.png; *.gif,*.bmp‘,
                ‘onUploadSuccess‘: function (file, data, response) { //上传成功回调方法
                    data = eval("("+data+")");
                    if (data.error == 0) {
                        alert("上传成功" + data.filename);
                    } else {
                        alert(data.message);
                        return;
                    }
                },
				‘swf‘      : ‘scripts/uploadify/uploadify.swf‘,
				‘uploader‘: ‘scripts/uploadify/UploadHandler.ashx‘
			});
		});
    </script>
</body>
</html>

　　我的站点目录结构：

技术分享

UploadHandler.ashx是处理上传的文件的一般处理程序：

public class UploadHandler : IHttpHandler
    {
        private HttpContext context;

        public void ProcessRequest(HttpContext context)
        {
            //文件保存路径
            String savePath = context.Server.MapPath("~/UploadFiles/");

            if (!Directory.Exists(savePath))   //如果这个路径不存在，则先创建
            {
                Directory.CreateDirectory(savePath);
            }

            //定义允许上传的文件扩展名
            Hashtable extTable = new Hashtable();
            extTable.Add("image", "gif,jpg,jpeg,png,bmp");
            
            //最大文件大小
            int maxSize = 1000000;
            this.context = context;

            HttpPostedFile file = context.Request.Files["Filedata"];
            if (file == null)
            {
                showError("请选择文件。");
            }

            if (file.InputStream == null || file.InputStream.Length > maxSize)
            {
                showError("上传文件大小超过限制。");
            }

            String fileName = file.FileName;   //文件名
            String fileExt = Path.GetExtension(fileName).ToLower();  //扩展名 如 .jpg

            if (String.IsNullOrEmpty(fileExt) || Array.IndexOf(((String)extTable["image"]).Split(‘,‘), fileExt.Substring(1).ToLower()) == -1)
            {
                showError("上传文件扩展名是不允许的扩展名。\n只允许" + ((String)extTable["image"]) + "格式。");
            }

            String newFileName = DateTime.Now.ToString("yyyyMMddHHmmss_ffff", DateTimeFormatInfo.InvariantInfo) + fileExt;
            String filePath = savePath + newFileName;

            file.SaveAs(filePath);

            //将保存了的新的文件名返回给前端
            Hashtable hash = new Hashtable();
            hash["error"] = 0;
            hash["filename"] = newFileName;
            context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
            context.Response.Write(JsonConvert.SerializeObject(hash));
            context.Response.End();
        }

        private void showError(string message)
        {
            Hashtable hash = new Hashtable();
            hash["error"] = 1;
            hash["message"] = message;
            context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
            context.Response.Write(JsonConvert.SerializeObject(hash));
            context.Response.End();
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }

　　技术分享