{"id":1463,"date":"2013-05-01T10:33:44","date_gmt":"2013-05-01T09:33:44","guid":{"rendered":"http:\/\/www.stuartroberts.net\/?p=1463"},"modified":"2013-10-19T17:27:34","modified_gmt":"2013-10-19T16:27:34","slug":"quick-tip-17","status":"publish","type":"post","link":"https:\/\/www.stuartroberts.net\/index.php\/2013\/05\/01\/quick-tip-17\/","title":{"rendered":"Create Zip File"},"content":{"rendered":"

SharePoint Short #17<\/strong><\/p>\n

Not so much a SharePoint post, but can be used in a SharePoint project, so counts for me \ud83d\ude42<\/p>\n

Using the WindowsBase assembly provides access to the System.IO.Packaging namespace and the PackagePart<\/a> class.<\/p>\n

Using this class to create an in memory zip file containing one or more files is pretty straight forward:<\/p>\n

\r\npublic byte[] GetZipData()\r\n{\r\n    byte[] data;\r\n    using (MemoryStream stream = new MemoryStream())\r\n    {\r\n        using (Package package = ZipPackage.Open(stream, FileMode.Create, FileAccess.ReadWrite))\r\n        {\r\n            \/\/ Wrap the rest of the using block in a for loop to iterate over files you want to\r\n            \/\/ include in the package, this example only adds a single file.\r\n            \r\n            \/\/ Create the file to include in the zip\r\n            Uri uri = PackUriHelper.CreatePartUri(new Uri(\"FileToIncludeInZip.txt\", UriKind.Relative));\r\n            PackagePart packagePart = package.CreatePart(uri, MediaTypeNames.Application.Octet, CompressionOption.Normal);\r\n            \r\n            using (Stream packagePartStream = packagePart.GetStream())\r\n            {\r\n                \/\/ Get content for file as byte array.\r\n                byte[] packagePartData = Encoding.UTF8.GetBytes(\"content to write to FileToIncludeInZip.txt file\");\r\n                \/\/ Commit to package\r\n                packagePartStream.Write(packagePartData, 0, packagePartData.Length);\r\n            }\r\n        }\r\n\r\n        \/\/ Write stream content to data byte array\r\n        data = new byte[stream.Length];\r\n        stream.Position = 0;\r\n        stream.Read(data, 0, Convert.ToInt32(stream.Length));\r\n    }\r\n\r\n    return data;\r\n}\r\n\r\n\/\/ Code in you aspx page, WebPart, control, etc. :\r\n\r\nbyte[] data = GetZipData();\r\n\r\nPage.Response.Buffer = true;\r\nPage.Response.ClearHeaders();\r\nPage.Response.ClearContent();\r\nPage.Response.AddHeader(\"Content-Length\", data.Length.ToString());\r\nPage.Response.ContentType = \"application\/zip\";\r\nPage.Response.AppendHeader(\"Content-Disposition\", \"attachment;filename=DownloadableZipFile.zip\");\r\nPage.Response.BinaryWrite(data);\r\nPage.Response.Flush();\r\nPage.Response.Close();\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
SharePoint Short #17 Not so much a SharePoint post, but can be used in a SharePoint project, so counts for me \ud83d\ude42 Using the WindowsBase assembly provides access to the System.IO.Packaging namespace and the PackagePart class. Using this class to … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[44],"tags":[45],"class_list":["post-1463","post","type-post","status-publish","format-standard","hentry","category-shorts","tag-sharepoint-short"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t