在项目实施中,遇到了将多个文件一起打包后,提供给用户下载。如:在一个ASP.NET的开发项目中,通过一个GridView选中对应行数据的CheckBox,就可以实现对选中文件的打包下载了。

   在对多文件打包中用到了 DotNetZip 的方法来实现对多文件压缩打包。需要到http://dotnetzip.codeplex.com/处下载该文件,然后引用即可。

   下面就来看看吧,首先看下效果图:

ASP.NET多文件批量打包下载 (这个好)
Default.aspx:

<%@ Page Language="C#"   CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!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>图片打包下载</title>
</head>
<body>
<form > </Columns>
</asp:GridView>
</form>
</body>
</html>

Default.aspx.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using Ionic.Zip;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            BindFilesList();
        }
    }

    void BindFilesList()
    {
        List<System.IO.FileInfo> lstFI = new List<System.IO.FileInfo>();
        string[] files = System.IO.Directory.GetFiles("d:\\webroot");
        foreach (var s in files)
        {
            lstFI.Add(new System.IO.FileInfo(s));
        }

        GridView1.DataSource = lstFI;
        GridView1.DataBind();
    }

    protected void PackDown_Click(object sender, EventArgs e)
    {
        Response.Clear();
        Response.ContentType = "application/zip";
        Response.AddHeader("content-disposition", "filename=DotNetZip.zip");
        using (ZipFile zip = new ZipFile(System.Text.Encoding.Default))//解决中文乱码问题
        {
            foreach (GridViewRow gvr in GridView1.Rows)
            {
                if (((CheckBox)gvr.Cells[0].Controls[1]).Checked)
                {
                    zip.AddFile("d:\\webroot\\" + (gvr.Cells[1].Controls[1] as Label).Text, "");
                }
            }

            zip.Save(Response.OutputStream);
        }

        Response.End();
    }
}

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