DotNetZip - ASP.NET Example in C#
ASP.NET Example in C#
Here's an Example ASP.NET page, using C#, that dynamically creates a zip file and saves it to Response.OutStream. From the browser, the user will be prompted with the familiar download dialog box, allowing Open, Save, or Cancel of the generated zip file.
CopyASP.NET example in C#1<%@ Page 2 Language="C#" 3 Debug="true" %> 4 5<%@ Import Namespace="System.Text" %> 6<%@ Import Namespace="System.IO" %> 7<%@ Import Namespace="Ionic.Zip" %> 8<%@ Import Namespace="System.Collections.Generic" %> 9 10<script language="C#" runat="server"> 11 12// ZipExample.aspx 13// 14// This .aspx page demonstrates how to use the DotNetZip library from within ASP.NET. 15// 16// To run it, 17// 1. drop the Ionic.Zip.dll into the \bin directory of your ASP.NET app 18// 2. create a subdirectory called "fodder" in your web app directory. 19// 3. copy into that directory a variety of random files. 20// 4. insure your web.config is properly set up (See below) 21// 22// 23// notes: 24// This requies the .NET Framework 3.5 - because it uses the ListView control that is 25// new for ASP.NET in the .NET Framework v3.5. 26// 27// To use this control, you must add the new web controls. Also, you must use the v3.5 compiler. 28// IF you build your app in Visual Studio, this is all done for you. If you don't use VS2008, 29// here's an example web.config that works with this aspx file: 30// 31// <configuration> 32// <system.web> 33// <trust level="Medium" /> 34// <compilation defaultLanguage="c#" /> 35// <pages> 36// <controls> 37// <add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> 38// </controls> 39// </pages> 40// </system.web> 41// <system.codedom> 42// <compilers> 43// <compiler language="c#;cs;csharp" extension=".cs" warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"> 44// <providerOption name="CompilerVersion" value="v3.5" /> 45// <providerOption name="WarnAsError" value="false" /> 46// </compiler> 47// </compilers> 48// </system.codedom> 49// </configuration> 50// 51// 52// 53 54 55public String width = "100%"; 56 57public void Page_Load (Object sender, EventArgs e) 58{ 59 try 60 { 61 if ( !Page.IsPostBack ) { 62 // populate the dropdownlist 63 // must have a directory called "fodder" in the web app 64 String homeDir = Server.MapPath("."); 65 String sMappedPath= Server.MapPath("fodder"); 66 67 var fqFilenames= new List<String>(System.IO.Directory.GetFiles(sMappedPath)); 68 var filenames= fqFilenames.ConvertAll((s) => { return s.Replace(sMappedPath+"\\", ""); }); 69 70 ErrorMessage.InnerHtml = ""; 71 72 FileListView.DataSource = filenames; 73 FileListView.DataBind(); 74 } 75 76 } 77 catch (Exception) 78 { 79 // Ignored 80 } 81} 82 83 84public void btnGo_Click (Object sender, EventArgs e) 85{ 86 ErrorMessage.InnerHtml =""; // debugging only 87 var filesToInclude= new System.Collections.Generic.List<String>(); 88 String sMappedPath= Server.MapPath("fodder"); 89 var source= FileListView.DataKeys as DataKeyArray ; 90 91 foreach (var item in FileListView.Items) 92 { 93 CheckBox chkbox= item.FindControl("include") as CheckBox ; 94 Label lbl= item.FindControl("label") as Label ; 95 96 if (chkbox!=null && lbl != null) 97 { 98 if (chkbox.Checked) 99 { 100 ErrorMessage.InnerHtml += String.Format("adding file: {0}<br/>\n", lbl.Text); 101 102 filesToInclude.Add(System.IO.Path.Combine(sMappedPath,lbl.Text)); 103 } 104 } 105 } 106 107 if (filesToInclude.Count==0) 108 { 109 ErrorMessage.InnerHtml += "You did not select any files?<br/>\n"; 110 111 } 112 else 113 { 114 Response.Clear(); 115 116 System.Web.HttpContext c= System.Web.HttpContext.Current; 117 String ReadmeText= String.Format("README.TXT\n\nHello!\n\n"+ 118 "This is a zip file that was dynamically generated at {0}\n"+ 119 "by an ASP.NET Page running on the machine named '{1}'.\n"+ 120 "The server type is: {2}\n", 121 System.DateTime.Now.ToString("G"), 122 System.Environment.MachineName, 123 c.Request.ServerVariables["SERVER_SOFTWARE"] 124 ); 125 string archiveName= String.Format("archive-{0}.zip", DateTime.Now.ToString("yyyy-MMM-dd-HHmmss")); 126 Response.ContentType = "application/zip"; 127 Response.AddHeader("content-disposition", "filename=" + archiveName); 128 129 using (ZipFile zip = new ZipFile()) 130 { 131 foreach (var f in filesToInclude) 132 { 133 zip.AddFile(f, "files"); 134 } 135 zip.AddEntry("Readme.txt", ReadmeText); 136 zip.Save(Response.OutputStream); 137 } 138 Response.Close(); 139 } 140 141} 142 143</script> 144 145 146 147<html> 148 <head> 149 <link rel="stylesheet" href="style/basic.css"> 150 </head> 151 152 <body> 153 154 <form id="Form" runat="server"> 155 156 <h3> <span id="Title" runat="server" />Zip Files from ASP.NET </h3> 157 158 <p>This page uses the .NET Zip library 159 (see <a href="http://www.codeplex/com/DotNetZip">http://www.codeplex/com/DotNetZip</a>) 160 to dynamically create a zip archive, and then download it to the browser through Response.OutputStream</p> 161 162 <span class="SampleTitle"><b>Check the boxes to select the files, then click the button to zip them up.</b></span> 163 <br/> 164 <br/> 165 <asp:Button id="btnGo" Text="Zip checked files" AutoPostBack OnClick="btnGo_Click" runat="server"/> 166 167 <br/> 168 <br/> 169 <span style="color:red" id="ErrorMessage" runat="server"/> 170 <br/> 171 172 <asp:ListView ID="FileListView" runat="server"> 173 174 <LayoutTemplate> 175 <table> 176 <tr ID="itemPlaceholder" runat="server" /> 177 </table> 178 </LayoutTemplate> 179 180 <ItemTemplate> 181 <tr> 182 <td><asp:Checkbox ID="include" runat="server"/></td> 183 <td><asp:Label id="label" runat="server" Text="<%# Container.DataItem %>" /></td> 184 </tr> 185 </ItemTemplate> 186 187 <EmptyDataTemplate> 188 <div>Nothing to see here...</div> 189 </EmptyDataTemplate> 190 191 </asp:ListView> 192 193 194 </form> 195 196 </body> 197 198</html>