ASP.NET MVC and Ionic.Zip
I wanted to stream a dynamically generated Zip file in a ASP.NET MVC site. Ionic.Zip looked like the best option for Zip library. The Create a downloadable zip within ASP.NET example looked pretty close to what I needed, but I wanted to have a suitable ActionResult class to use in my controller. Here is what I came up with:
/// <summary> /// A content result which can accepts a DotNetZip ZipFile object to write to the output stream /// </summary> public class ZipFileResult : ActionResult { public ZipFile zip {get;set;} public string filename {get; set;} public ZipFileResult(ZipFile zip) { this.zip = zip; this.filename = null; } public ZipFileResult(ZipFile zip, string filename) { this.zip = zip; this.filename = filename; } public override void ExecuteResult(ControllerContext context) { var Response = context.HttpContext.Response; Response.ContentType = "application/zip"; Response.AddHeader("Content-Disposition", "attachment;" + (string.IsNullOrEmpty(filename) ? "" : "filename=" + filename)); zip.Save(Response.OutputStream); Response.End(); } }
The example noted above becomes:
public class MyZipFileController : Controller { public ActionResult Index() { string ReadmeText= "This is a zip file dynamically generated at " + System.DateTime.Now.ToString("G"); string filename = System.IO.Path.GetFileName(ListOfFiles.SelectedItem.Text) + ".zip"; ZipFile zip = new ZipFile(); zip.AddFile(ListOfFiles.SelectedItem.Text, "files"); zip.AddEntry("Readme.txt", "", ReadmeText); return new ZipFileResult(zip, filename); } }