Uploadify 3.2上传文件，限制类型，大小，传递参数等

来源：互联网发布：新生入学调查问卷知乎编辑：程序博客网时间：2024/05/22 20:45

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<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="upload.aspx.cs" Inherits="PDF2016.upload" %>  
  
<!DOCTYPE html>  
  
<html xmlns="http://www.w3.org/1999/xhtml">  
<head runat="server">  
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
    <title>uploadify3.2上传文件</title>  
    <script src="js/jquery-1.10.2.min.js"></script>  
    <link href="js/uploadify3.2/uploadify.css" rel="stylesheet" />  
    <script src="js/uploadify3.2/jquery.uploadify.min.js"></script>  
    <script type="text/javascript">  
        $(function () {  
            /*************setting***************/  
            var definedData = [];  
            definedData.auth = "@(Request.Cookies[FormsAuthentication.FormsCookieName]==null ? string.Empty : Request.Cookies[FormsAuthentication.FormsCookieName].Value)";  
            definedData.ASPSESSID = "@Session.SessionID";  
            definedData.fileTypeExts = "*.doc;*.docx;*.xls;*.xlsx;*.pdf;*.ppt;*.txt;*.rar;*.zip;*.exe";    //上传类型  
            definedData.uploader = "/UploadHandler.ashx";    //后台处理路径  
            definedData.fileSizeLimit = "2MB";  //上传大小  
            definedData.fileObjName = "file_upload";    //控件名  
            definedData.queueSizeLimit = 1;      //允许上传个数文件  
            var data = { 'ASPSESSID': definedData.ASPSESSID, 'AUTHID': definedData.auth };    //firefox用swf上传丢失session  
  
            var errorData = [];  
            errorData.err100 = "文件个数超出系统限制，只允许上传" + definedData.queueSizeLimit + "个文件！";  
            errorData.err110 = "文件超出系统限制的大小，限制文件大小" + definedData.fileSizeLimit + "！";  
            errorData.err120 = "文件大小异常！";  
            errorData.err130 = "文件类型不正确，只允许上传后缀名" + definedData.fileTypeExts + "！";  
            /*************setting***************/  
            $("#file_upload").uploadify({  
                'buttonText': '选择资源',  
                'swf': '/js/uploadify3.2/uploadify.swf',  
                'uploader': definedData.uploader,  
                'auto': false, //当文件被添加到队列时，自动上传  
                'formData': data, //上传时传递数据  
                'fileObjName': definedData.fileObjName,  
                'queueSizeLimit': definedData.queueSizeLimit,  
                'fileTypeExts': definedData.fileTypeExts,  
                'fileSizeLimit': definedData.fileSizeLimit,  
                'onUploadSuccess': function(file, data, response) {  
                    $('#file_upload').uploadify('cancel', '*'); //隐藏进度条</span>  
                    var dataJson = JSON.parse(data);  
                    if (dataJson.Status) {  
                        //上传成功  
                        alert(dataJson.Message);  
                    } else {  
                        //上传失败  
                        alert(dataJson.Message);  
                    }  
                },  
                //返回一个错误，选择文件的时候触发  
                'onSelectError': function (file, errorCode, errorMsg) {  
                    switch (errorCode) {  
                        case -100:  
                            alert(errorData.err100);  
                            break;  
                        case -110:  
                            alert(errorData.err110);  
                            break;  
                        case -120:  
                            alert(errorData.err120);  
                            break;  
                        case -130:  
                            alert(errorData.err130);  
                            break;  
                    }  
                },  
                //检测FLASH失败调用    
                'onFallback': function () {  
                    alert("您未安装FLASH控件，无法上传！请安装FLASH控件后再试。");  
                }  
            });  
        });  
    </script>  
</head>  
<body>  
    <form id="form1" runat="server">  
        <div>  
            <p><input type="file" name="file_upload" id="file_upload" /></p>  
            <p>  
                <img src="js/uploadify3.2/upload.jpg" style="cursor: pointer;" onclick="javascript:$('#file_upload').uploadify('upload')" />  
            </p>  
        </div>  
    </form>  
</body>  
</html>  

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using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Web;  
using System.IO;  
using Newtonsoft.Json;  
  
namespace PDF2016  
{  
    /// <summary>  
    /// UploadHandler 的摘要说明  
    /// </summary>  
    public class UploadHandler : IHttpHandler  
    {  
  
        public void ProcessRequest(HttpContext context)  
        {  
            context.Response.ContentType = "text/plain";  
            context.Response.Charset = "utf-8";  
  
            UploadResult result = new UploadResult();  
            HttpPostedFile file = context.Request.Files["file_upload"];  
            string folder = context.Server.MapPath("~/upload/");  
            if (file != null && file.ContentLength > 0)  
            {  
                if (!Directory.Exists(folder))  
                {  
                    Directory.CreateDirectory(folder);  
                }  
                file.SaveAs(Path.Combine(folder, file.FileName));  
                result.Status = true;  
                result.Message =  file.FileName;  
            }  
            else  
            {  
                result.Status = false;  
                result.Message = "请选择上传文件";  
            }  
            string json = JsonConvert.SerializeObject(result, Formatting.Indented);  
            context.Response.Write(json);  
        }  
  
  
        public class UploadResult  
        {  
            public bool Status;  
            public string Message;  
        }  
  
        public bool IsReusable  
        {  
            get { return false; }  
        }  
    }  
}  

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//在Global.asax中添加如下代码  
//using System.Web.Security;  
protected void Application_BeginRequest(object sender, EventArgs e)  
{  
    try  
    {  
        string session_param_name = "ASPSESSID";  
        string session_cookie_name = "ASP.NET_SESSIONID";  
  
        if (HttpContext.Current.Request.Form[session_param_name] != null)  
        {  
            UpdateCookie(session_cookie_name, HttpContext.Current.Request.Form[session_param_name]);  
        }  
        else if (HttpContext.Current.Request.QueryString[session_param_name] != null)  
        {  
            UpdateCookie(session_cookie_name, HttpContext.Current.Request.QueryString[session_param_name]);  
        }  
    }  
    catch (Exception)  
    {  
    }  
  
    try  
    {  
        string auth_param_name = "AUTHID";  
        string auth_cookie_name = FormsAuthentication.FormsCookieName;  
  
        if (HttpContext.Current.Request.Form[auth_param_name] != null)  
        {  
            UpdateCookie(auth_cookie_name, HttpContext.Current.Request.Form[auth_param_name]);  
        }  
        else if (HttpContext.Current.Request.QueryString[auth_param_name] != null)  
        {  
            UpdateCookie(auth_cookie_name, HttpContext.Current.Request.QueryString[auth_param_name]);  
        }  
  
    }  
    catch (Exception)  
    {  
    }  
  
  
}  
void UpdateCookie(string cookie_name, string cookie_value)  
{  
    HttpCookie cookie = HttpContext.Current.Request.Cookies.Get(cookie_name);  
    if (cookie == null)  
    {  
        HttpCookie cookie1 = new HttpCookie(cookie_name, cookie_value);  
        Response.Cookies.Add(cookie1);  
    }  
    else  
    {  
        cookie.Value = cookie_value;  
        HttpContext.Current.Request.Cookies.Set(cookie);  
    }  
}

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