[ASP.NET]利用 DotNetZip 或 SharpZip 一次下載多個檔案

利用 DotNetZip or SharpZip 這兩個壓縮的Lib 可以將檔案壓縮起來

就像RAR那樣可以打包多個檔案為一個壓縮檔

這樣的功能,在web就可以達到一次下載多個檔案了

小弟就用一個實例來說明如何達到此功能

首先準備好要使用的DotNetZip 和 SharpZip dll,到下列網址下載

DotNetZip Url：
http://www.codeplex.com/DotNetZip

SharpZip Url：
http://www.icsharpcode.net/OpenSource/SharpZipLib/

此範例主要是先列出目錄底下所有檔案的清單,然後

1.可針對單一檔案下載(點HyperLink)

2.可勾選多個檔案,使用DotNetZip 或 SharpZip 壓縮為一個檔案輸出下載

MultiFileDownload.aspx

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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="MultiFileDownload.aspx.cs" 

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    Inherits="MultiFileDownload" %> 

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 

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<html xmlns="http://www.w3.org/1999/xhtml"> 

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<head runat="server"> 

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    <title>MultiFileDownload</title> 

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</head> 

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<body> 

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    <form id="form1" runat="server"> 

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    <div> 

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        <asp:Button ID="btnDotNetZip" runat="server" Text="利用DotNetZip下載" Width="200px" OnClick="btnDotNetZip_Click" /> 

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        <br /> 

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        <asp:Button ID="btnSharpZip" runat="server" Text="利用SharpZip下載" Width="200px" OnClick="btnSharpZip_Click" /> 

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        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" Width="200px"> 

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            <Columns> 

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                <asp:TemplateField HeaderText="Selected"> 

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                    <ItemTemplate> 

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                        <asp:CheckBox ID="CheckBox1" runat="server" /> 

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                    </ItemTemplate> 

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                    <ItemStyle HorizontalAlign="Center" /> 

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                </asp:TemplateField> 

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                <asp:TemplateField HeaderText="File Name"> 

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                    <ItemTemplate> 

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                        <asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='<%# "zip/"+Eval("Name") %>' 

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                            Text='<%# Eval("Name") %>'></asp:HyperLink> 

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                    </ItemTemplate> 

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                </asp:TemplateField> 

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            </Columns> 

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        </asp:GridView> 

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    </div> 

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    </form> 

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</body> 

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</html>

MultiFileDownload.aspx.cs

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using System; 

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using System.Collections.Generic; 

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using System.Web; 

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using System.Web.UI; 

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using System.Web.UI.WebControls; 

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using System.IO; 

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//DotNetZip,加入Ionic.Zip.Partial.dll 

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using DotNetZip = Ionic.Zip; 

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//SharpZip,加入ICSharpCode.SharpZipLib.dll 

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using SharpZip = ICSharpCode.SharpZipLib.Zip; 

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public partial class MultiFileDownload : System.Web.UI.Page 

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{ 

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    protected void Page_Load(object sender, EventArgs e) 

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    { 

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        if (!IsPostBack) 

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        { 

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            this.GridView1.DataSource = GetFiles(); 

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            this.GridView1.DataBind(); 

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        } 

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    } 

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    private List<FileInfo> GetFiles() 

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    { 

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        List<FileInfo> lstFileInfo = new List<FileInfo>(); 

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        string dir = Server.MapPath("zip"); 

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        FileInfo info; 

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        string[] files; 

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        files = Directory.GetFiles(dir); 

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        foreach (string item in files) 

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        { 

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            info = new FileInfo(item); 

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            lstFileInfo.Add(info); 

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        } 

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        return lstFileInfo; 

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    } 

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    private List<FileInfo> GetSelectFile() 

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    { 

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        List<FileInfo> lstSelected = new List<FileInfo>(); 

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        foreach (GridViewRow item in this.GridView1.Rows) 

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        { 

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            //找出勾選的檔案 

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            if (((CheckBox)item.Cells[0].Controls[1]).Checked) 

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            { 

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                //記錄勾選的檔案 

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                lstSelected.Add(GetFiles().Find(delegate(FileInfo f) { return f.Name == ((HyperLink)item.Cells[1].Controls[1]).Text; })); 

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            } 

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        } 

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        return lstSelected; 

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    } 

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    #region DotNetZip 

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    //參考網址：http://blog.miniasp.com/?tag=/dotnetzip 

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    protected void btnDotNetZip_Click(object sender, EventArgs e) 

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    { 

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        //利用DotNetZip壓縮輸出檔案 

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        List<FileInfo> lstSelected = GetSelectFile(); 

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        if (lstSelected.Count > 0) 

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        { 

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            Response.Clear(); 

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            Response.ContentType = "application/zip"; 

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            Response.AddHeader("content-disposition", "filename=" + "DotNetZip.zip"); 

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            using (DotNetZip.ZipFile zip = new DotNetZip.ZipFile(System.Text.Encoding.Default))//解決中文亂碼問題 

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            { 

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                foreach (FileInfo file in lstSelected) 

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                { 

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                    zip.AddFile(file.FullName, ""); 

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                } 

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                zip.Save(Response.OutputStream); 

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            } 

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            Response.End(); 

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        } 

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    } 

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    #endregion 

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    #region SharpZip 

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    //參考網址：http://richielin-programer.blogspot.com/2008/04/c-sharpzip.html 

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    protected void btnSharpZip_Click(object sender, EventArgs e) 

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    { 

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        //利用SharpZip壓縮輸出檔案 

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        List<FileInfo> lstSelected = GetSelectFile(); 

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        if (lstSelected.Count > 0) 

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        { 

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            Response.Clear(); 

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            Response.ContentType = "application/zip"; 

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            Response.AddHeader("content-disposition", "filename=" + "SharpZip.zip"); 

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            using (SharpZip.ZipOutputStream zip = new SharpZip.ZipOutputStream(Response.OutputStream)) 

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            { 

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                foreach (FileInfo file in lstSelected) 

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                { 

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                    AddZipEntry(zip, "", file.FullName); 

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                } 

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                zip.Finish(); 

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                zip.IsStreamOwner = false;// 避免 stream 被 zip 物件關閉 

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            } 

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            Response.End(); 

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        } 

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    } 

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    //參考網址：http://richielin-programer.blogspot.com/2008/04/c-sharpzip.html 

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    private static void AddZipEntry(SharpZip.ZipOutputStream zip, string folder, string filename) 

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    { 

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        if (System.IO.Directory.Exists(filename) == true) 

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        { 

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            // Folder 

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            System.IO.DirectoryInfo di = new System.IO.DirectoryInfo(filename); 

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            string folder_ = folder + di.Name + "/"; 

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            SharpZip.ZipEntry zFolder = new SharpZip.ZipEntry(folder_); 

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            zip.PutNextEntry(zFolder); 

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            foreach (System.IO.DirectoryInfo d in di.GetDirectories()) 

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                AddZipEntry(zip, folder_, d.FullName); 

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            foreach (System.IO.FileInfo f in di.GetFiles()) 

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                AddZipEntry(zip, folder_, f.FullName); 

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        } 

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        else if (System.IO.File.Exists(filename) == true) 

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        { 

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            // File 

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            zip.SetLevel(9); 

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            using (System.IO.FileStream fs = System.IO.File.OpenRead(filename)) 

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            { 

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                byte[] b = new byte[fs.Length]; 

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                fs.Read(b, 0, b.Length); 

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                SharpZip.ZipEntry z = new SharpZip.ZipEntry(folder + new System.IO.FileInfo(filename).Name); 

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                zip.PutNextEntry(z); 

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                zip.Write(b, 0, b.Length); 

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            } 

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        } 

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    } 

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    #endregion 

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}

執行結果：

參考網址：

http://blog.miniasp.com/?tag=/dotnetzip
http://cheeso.members.winisp.net/DotNetZipHelp/Examples.htm
http://www.dotblogs.com.tw/chhuang/archive/2009/02/10/7102.aspx
http://www.dotblogs.com.tw/fatty0860/archive/2009/02/09/7084.aspx
http://richielin-programer.blogspot.com/2008/04/c-sharpzip.html
http://blog.csdn.net/cityhunter172/archive/2005/01/25/267150.aspx

posted @ 2010-08-27 09:23 peterlee 阅读(776) 评论(0) 收藏举报

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[ASP.NET]利用 DotNetZip 或 SharpZip 一次下載多個檔案

[ASP.NET]利用 DotNetZip 或 SharpZip 一次下載多個檔案

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