我想在.NET 4.5（System.IO.Compression）中从一系列字节数组中创建Zip文件。例如，从我使用的API中，我得到一个List<Attachment>，每个Attachment都有一个名为Body的属性，该属性是一个byte[]。 我该如何遍历该列表并创建包含每个附件的zip文件？
目前我认为我必须将每个附件写入磁盘并从那里创建zip文件。
//This is great if I had the files on disk
ZipFile.CreateFromDirectory(startPath, zipPath);
//How can I create it from a series of byte arrays?
在更多的尝试和阅读后，我成功地解决了这个问题。以下是创建一个包含多个文件的 zip 文件（归档文件）而不需要将任何临时数据写入磁盘的方法：
using (var compressedFileStream = new MemoryStream())
{
//Create an archive and store the stream in memory.
using (var zipArchive = new ZipArchive(compressedFileStream, ZipArchiveMode.Create, false)) {
foreach (var caseAttachmentModel in caseAttachmentModels) {
//Create a zip entry for each attachment
var zipEntry = zipArchive.CreateEntry(caseAttachmentModel.Name);
//Get the stream of the attachment
using (var originalFileStream = new MemoryStream(caseAttachmentModel.Body))
using (var zipEntryStream = zipEntry.Open()) {
//Copy the attachment stream to the zip entry stream
originalFileStream.CopyTo(zipEntryStream);
}
}
}
return new FileContentResult(compressedFileStream.ToArray(), "application/zip") { FileDownloadName = "Filename.zip" };
}
zipArchive关闭之后才有返回语句。通过移除嵌套，现在将返回语句放置在zipArchive的using语句内部。由于没有处理，归档文件无效。 - Zeph这是由发帖者发布的一个广受欢迎的答案的变形。然而，这是针对WebForms而不是MVC的。 我假定caseAttachmentModel.Body是一个byte[]。
基本上一切都相同，只是多了一个将zip作为响应发送的方法。
using (var compressedFileStream = new MemoryStream()) {
//Create an archive and store the stream in memory.
using (var zipArchive = new ZipArchive(compressedFileStream, ZipArchiveMode.Update, false)) {
foreach (var caseAttachmentModel in caseAttachmentModels) {
//Create a zip entry for each attachment
var zipEntry = zipArchive.CreateEntry(caseAttachmentModel.Name);
//Get the stream of the attachment
using (var originalFileStream = new MemoryStream(caseAttachmentModel.Body)) {
using (var zipEntryStream = zipEntry.Open()) {
//Copy the attachment stream to the zip entry stream
originalFileStream.CopyTo(zipEntryStream);
}
}
}
}
sendOutZIP(compressedFileStream.ToArray(), "FileName.zip");
}
private void sendOutZIP(byte[] zippedFiles, string filename)
{
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.ContentType = "application/x-compressed";
Response.Charset = string.Empty;
Response.Cache.SetCacheability(System.Web.HttpCacheability.Public);
Response.AddHeader("Content-Disposition", "attachment; filename=" + filename);
Response.BinaryWrite(zippedFiles);
Response.OutputStream.Flush();
Response.OutputStream.Close();
Response.End();
}