除了在C＃中提取Zip文件

本文介绍了除了在C＃中提取Zip文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我在提取码工作，解压缩zip文件，在WinRT中使用C＃

I am working on Extraction Code to Extract Zip file, Using C# in winrt.

我收到来自本地驱动器这里文件：

I am getting File from Local Drive here:

StorageFile file = await KnownFolders.PicturesLibrary.GetFileAsync("dostoyevsky-poor-folk.zip"); Stream zipMemoryStream = await file.OpenStreamForReadAsync(); var folder = ApplicationData.Current.LocalFolder; // Create zip archive to access compressed files in memory stream using (ZipArchive zipArchive = new ZipArchive(zipMemoryStream, ZipArchiveMode.Read)) { // For each compressed file... foreach (ZipArchiveEntry entry in zipArchive.Entries) { if (entry.Name == "") { // Folder await CreateRecursiveFolder(folder, entry); } else { // File await ExtractFile(folder, entry); } } }

我提取对于文件夹位置

I am Extracting For folder here:

private async Task CreateRecursiveFolder(StorageFolder folder, ZipArchiveEntry entry) { var steps = entry.FullName.Split('/').ToList(); steps.RemoveAt(steps.Count() - 1); foreach (var i in steps) { await folder.CreateFolderAsync(i, CreationCollisionOption.OpenIfExists); folder = await folder.GetFolderAsync(i); } }

我提取对于文件位置：

I am Extracting For File Here:

private async Task ExtractFile(StorageFolder folder, ZipArchiveEntry entry) { var steps = entry.FullName.Split('/').ToList(); steps.RemoveAt(steps.Count() - 1); foreach (var i in steps) { folder = await folder.GetFolderAsync(i); } using (Stream fileData = entry.Open()) { StorageFile outputFile = await folder.CreateFileAsync(entry.Name, CreationCollisionOption.ReplaceExisting); using (Stream outputFileStream = await outputFile.OpenStreamForWriteAsync()) { await fileData.CopyToAsync(outputFileStream); await outputFileStream.FlushAsync(); } } }

当我尝试使用此我得到这个异常：System.NullReferenceException。 除外越来越线是等待outputFileStream.FlushAsync（）的最后一行;

When I try to use this I get this exception: 'System.NullReferenceException' . The Exception getting line is the Last line of await outputFileStream.FlushAsync();

有些时候，我得到相同的异常，当我尝试从本地驱动器挑文件。 之前获得异常等待outputFileStream.FlushAsync（）这样看。

Some times I am getting same exception when I try to pick file from Local Drive. Before Getting Exception the Debugger value of await outputFileStream.FlushAsync() looking like this.

您可以帮我出这一点。

感谢

推荐答案

最后，这是为我工作。为什么？因为我得到空值，而因为我要去的地方解压缩文件包的提取。 我相信这是提取使用的C＃Windows Store应用程序的Zip文件的完美解决方案。 谢谢

Finally, It is Worked for me. Why because I am getting Null value while extraction Because of the package where I am going to extract files. I am sure this is the perfect solution to Extract Zip file for windows store apps using c#. Thanks