多附件上传方法1 uploadify

方法一

使用uploadify控件，引用：http://www.cnblogs.com/oec2003/archive/2010/01/06/1640027.html

可以一次选择多个，使用uploadHander.ashx处理后台。可以自动上传，也可以手动

前台代码:要引用一些js

    <link href="../JS/jquery.uploadify-v2.1.0/example/css/default.css" rel="stylesheet"
        type="text/css" />
    <link href="../JS/jquery.uploadify-v2.1.0/uploadify.css" rel="stylesheet" type="text/css" />
    <script type="text/javascript" src="../JS/jquery.uploadify-v2.1.0/jquery-1.3.2.min.js"></script>
    <script type="text/javascript" src="../JS/jquery.uploadify-v2.1.0/swfobject.js"></script>
    <script type="text/javascript" src="../JS/jquery.uploadify-v2.1.0/jquery.uploadify.v2.1.0.min.js"></script>
    <script type="text/javascript">
        $(document).ready(function () {

            $("#uploadify").uploadify({

                'uploader': '../JS/jquery.uploadify-v2.1.0/uploadify.swf',
                'script': '../UploadHandlerStore.ashx',
                'scriptData': { billNum: $("#hdBillNum").val() },
                'cancelImg': '../JS/jquery.uploadify-v2.1.0/cancel.png',
                'folder': '../UploadFiles/store/',
                'queueID': 'fileQueue',
                'auto': false,
                'multi': true, //多选
                'width': '100',
                'height': '27',
                'buttonImg': '../JS/jquery.uploadify-v2.1.0/fj.gif',
                'queueSizeLimit': 15, //允许上传的最大个数
                'simUploadLimit': 15//同时上传的个数
            });
        });

//【上传】
        function btnUploadOnClientClick() {
        
            $('#uploadify').uploadifyUpload();
        }
    </script>

 前台html

  <table class="TableBorder" id="tabAttachment">
        <tr>
            <td align="right">
                附件:
            </td>
            <td>
                <input type="file" name="uploadify" id="uploadify" />
            </td>
        </tr>
        <tr>
            <td align="right">
                 
            </td>
            <td align="left">
                <div id="fileQueue">
                </div>
                <br />
            </td>
        </tr>
        <tr>
            <td align="right">
                
            </td>
            <td align="left">
            <asp:Button ID="btnUpload" runat="server"  CssClass="btntNoColor" OnClick="btnUpload_Click" OnClientClick="btnUploadOnClientClick()" Text="上传附件"/>
            
                
            </td>
            </tr>
            <tr>
                <td class="tdstyle1">
                </td>
            <td>
                <asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
                    <ContentTemplate>
                        <asp:GridView ID="GVattachment" runat="server" SkinID="GridViewDefault" DataKeyNames="id"
                            AutoGenerateColumns="false" Width="80%">
                            <Columns>
                                <asp:TemplateField HeaderText="附件名称">
                                    <ItemTemplate>
                                        <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="false" CommandArgument='<%# Eval("saveAddress") %>'
                                            OnClick="LinkButton1_Click" Text='<%# Eval("FileTitle") %>'></asp:LinkButton>
                                    </ItemTemplate>
                                </asp:TemplateField>
                                <asp:TemplateField HeaderText="删除">
                                    <ItemTemplate>
                                        <asp:ImageButton ID="ImageButton1" runat="server" CommandArgument='<%# Eval("saveAddress") %>'
                                            ImageUrl="~/images/delete.gif" OnClick="ImageButton1_Click" OnClientClick="javascript:return confirm('您确认删除吗')" />
                                    </ItemTemplate>
                                </asp:TemplateField>
                            </Columns>
                        </asp:GridView>
                    </ContentTemplate>
                    <Triggers>
                        <asp:AsyncPostBackTrigger ControlID="btnUpload" />
                    </Triggers>
                </asp:UpdatePanel>
            </td>
        </tr>
    </table>

 上传按钮也可以用input，我这里是为了刷新后台下面的GridView。把按钮放设置为异步，可以上传文件同时刷新附件列表。

后台:

<%@ WebHandler Language="C#" Class="UploadHandlerStore" %>

using System;
using System.Web;
using MDGL.DBUtility;
using System.Data;
using System.IO;
public class UploadHandlerStore : IHttpHandler {

    public void ProcessRequest(HttpContext context)
    {
        context.Response.ContentType = "text/plain";
        context.Response.Charset = "utf-8";
        HttpPostedFile file = context.Request.Files["Filedata"];
        string uploadPath = HttpContext.Current.Server.MapPath(@context.Request["folder"]);//UploadFilespropertyManage
 
        string billNum = context.Request["billNum"];
        
        MDGL.DAL.propertyManage.lesseeApply Dal = new MDGL.DAL.propertyManage.lesseeApply();
        if (billNum == null)
        {
            return;
        }

        string sql;
        string newFileName;
        string fileType;
        string saveAddress;
        if (file != null)
        {
            if (!Directory.Exists(uploadPath))
            {
                Directory.CreateDirectory(uploadPath);
            }
            //文件重命名然后上传，插入
            fileType = file.FileName.Substring(file.FileName.IndexOf("."));//.docx
            PageClass pg = new PageClass();
            newFileName = pg.GetFileName() + fileType;// 年月日分秒毫秒+8位随机数   
            file.SaveAs(uploadPath + newFileName);
            saveAddress = context.Request["folder"] + newFileName;//地址+文件新名称
            //插入数据库
            sql = @"Insert into storeApprovalAttachment(billNum,fileType,fileTitle,saveAddress)
                                             values('" + billNum + "','" + fileType + "','" + file.FileName + "','" + saveAddress + "')";
            SQLServerHelper.ExecuteNonQuery(CommandType.Text, sql);

            context.Response.Write("1"); //下面这句代码缺少的话，上传成功后上传队列的显示不会自动消失 
        }
        else
        {
            context.Response.Write("0");
        }
    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }

}

 //备注。上传成功后若队列扔显示，点击【添加附件】没反应，所以context.Response.Write("1"); //下面这句代码缺少的话，上传成功后上传队列的显示不会自动消失最好注释掉。