为什么 SevenZipSharp.Interop NuGet 在尝试提取单个文件时会提取多个文件？
Why would the SevenZipSharp.Interop NuGet extract more than one file when trying to extract a single file?
可能只是我自己做错了什么，或者这可能是 class 的 预期结果 ，但我觉得有些地方不对劲...
我做了如下测试存档（文件夹里也有文件，但应该与本题无关）：
我使用follow方法提取单个文件(New Text Document.txt)...
#region SevenZipExtractor events
private void SevenZipExtractor_Extracting(object sender, ProgressEventArgs e)
{
System.Diagnostics.Debug.WriteLine("SevenZipExtractor_Extracting -- " + e.PercentDone + "%");
m_progress.UpdateProcessingStatus(e.PercentDone);
}
private void SevenZipExtractor_FileExtractionFinished(object sender, FileInfoEventArgs e)
{
System.Diagnostics.Debug.WriteLine("SevenZipExtractor_FileExtractionFinished -- " + e.PercentDone + "% Filename:" + e.FileInfo.FileName);
}
private void SevenZipExtractor_FileExtractionStarted(object sender, FileInfoEventArgs e)
{
System.Diagnostics.Debug.WriteLine("SevenZipExtractor_FileExtractionStarted -- " + e.PercentDone + "% Filename:" + e.FileInfo.FileName);
}
#endregion
private void DecompressThread()
{
using (SevenZipExtractor extractor = new SevenZipExtractor(inStream))
{
extractor.Extracting += SevenZipExtractor_Extracting;
extractor.FileExtractionStarted += SevenZipExtractor_FileExtractionStarted;
extractor.FileExtractionFinished += SevenZipExtractor_FileExtractionFinished;
using (FileStream file = new FileStream("C:\Sandbox\Z-Test\New Text Document.txt", FileMode.Create, FileAccess.Write))
{
extractor.ExtractFile(4, file);
}
extractor.Extracting -= SevenZipExtractor_Extracting;
extractor.FileExtractionStarted -= SevenZipExtractor_FileExtractionStarted;
extractor.FileExtractionFinished -= SevenZipExtractor_FileExtractionFinished;
}
}
然后使用事件 Extracting、FileExtractionStarted 和 FileExtractionFinished 我会 EXPECT 得到以下结果...
SevenZipExtractor_FileExtractionStarted -- 100% Filename:New Text Document.txt
SevenZipExtractor_Extracting -- 100%
SevenZipExtractor_FileExtractionFinished -- 100% Filename:New Text Document.txt
但是，我得到以下结果...
SevenZipExtractor_Extracting -- 100%
SevenZipExtractor_Extracting -- 100%
SevenZipExtractor_FileExtractionStarted -- 20% Filename:Test Folder 1
SevenZipExtractor_FileExtractionFinished -- 20% Filename:Test Folder 1
SevenZipExtractor_FileExtractionStarted -- 40% Filename:Test Folder 2
SevenZipExtractor_FileExtractionFinished -- 40% Filename:Test Folder 2
SevenZipExtractor_FileExtractionStarted -- 60% Filename:Microsoft - Visual Studio 6 MSDN Library.iso
SevenZipExtractor_Extracting -- 1%
SevenZipExtractor_Extracting -- 2%
SevenZipExtractor_Extracting -- 3%
SevenZipExtractor_Extracting -- 4%
SevenZipExtractor_Extracting -- 5%
SevenZipExtractor_Extracting -- 6%
SevenZipExtractor_Extracting -- 7%
SevenZipExtractor_Extracting -- 8%
SevenZipExtractor_Extracting -- 9%
SevenZipExtractor_Extracting -- 10%
SevenZipExtractor_Extracting -- 11%
SevenZipExtractor_Extracting -- 12%
SevenZipExtractor_Extracting -- 13%
SevenZipExtractor_Extracting -- 14%
SevenZipExtractor_Extracting -- 15%
SevenZipExtractor_Extracting -- 16%
SevenZipExtractor_Extracting -- 17%
SevenZipExtractor_Extracting -- 18%
SevenZipExtractor_Extracting -- 19%
SevenZipExtractor_Extracting -- 20%
SevenZipExtractor_Extracting -- 21%
SevenZipExtractor_Extracting -- 22%
SevenZipExtractor_Extracting -- 23%
SevenZipExtractor_Extracting -- 24%
SevenZipExtractor_Extracting -- 25%
SevenZipExtractor_Extracting -- 26%
SevenZipExtractor_Extracting -- 27%
SevenZipExtractor_Extracting -- 28%
SevenZipExtractor_Extracting -- 29%
SevenZipExtractor_Extracting -- 30%
SevenZipExtractor_Extracting -- 31%
SevenZipExtractor_Extracting -- 32%
SevenZipExtractor_Extracting -- 33%
SevenZipExtractor_Extracting -- 34%
SevenZipExtractor_Extracting -- 35%
SevenZipExtractor_Extracting -- 36%
SevenZipExtractor_Extracting -- 37%
SevenZipExtractor_Extracting -- 38%
SevenZipExtractor_Extracting -- 39%
SevenZipExtractor_Extracting -- 40%
SevenZipExtractor_Extracting -- 41%
SevenZipExtractor_Extracting -- 42%
SevenZipExtractor_Extracting -- 43%
SevenZipExtractor_Extracting -- 44%
SevenZipExtractor_Extracting -- 45%
SevenZipExtractor_Extracting -- 46%
SevenZipExtractor_Extracting -- 47%
SevenZipExtractor_Extracting -- 48%
SevenZipExtractor_Extracting -- 49%
SevenZipExtractor_Extracting -- 50%
SevenZipExtractor_Extracting -- 51%
SevenZipExtractor_Extracting -- 52%
SevenZipExtractor_Extracting -- 53%
SevenZipExtractor_Extracting -- 54%
SevenZipExtractor_Extracting -- 55%
SevenZipExtractor_Extracting -- 56%
SevenZipExtractor_Extracting -- 57%
SevenZipExtractor_Extracting -- 58%
SevenZipExtractor_Extracting -- 59%
SevenZipExtractor_Extracting -- 60%
SevenZipExtractor_Extracting -- 61%
SevenZipExtractor_Extracting -- 62%
SevenZipExtractor_Extracting -- 63%
SevenZipExtractor_Extracting -- 64%
SevenZipExtractor_Extracting -- 65%
SevenZipExtractor_Extracting -- 66%
SevenZipExtractor_Extracting -- 67%
SevenZipExtractor_Extracting -- 68%
SevenZipExtractor_Extracting -- 69%
SevenZipExtractor_Extracting -- 70%
SevenZipExtractor_Extracting -- 71%
SevenZipExtractor_Extracting -- 72%
SevenZipExtractor_Extracting -- 73%
SevenZipExtractor_Extracting -- 74%
SevenZipExtractor_Extracting -- 75%
SevenZipExtractor_Extracting -- 76%
SevenZipExtractor_Extracting -- 77%
SevenZipExtractor_Extracting -- 78%
SevenZipExtractor_Extracting -- 79%
SevenZipExtractor_Extracting -- 80%
SevenZipExtractor_Extracting -- 81%
SevenZipExtractor_Extracting -- 82%
SevenZipExtractor_Extracting -- 83%
SevenZipExtractor_Extracting -- 84%
SevenZipExtractor_Extracting -- 85%
SevenZipExtractor_Extracting -- 86%
SevenZipExtractor_Extracting -- 87%
SevenZipExtractor_Extracting -- 88%
SevenZipExtractor_Extracting -- 89%
SevenZipExtractor_Extracting -- 90%
SevenZipExtractor_Extracting -- 91%
SevenZipExtractor_Extracting -- 92%
SevenZipExtractor_Extracting -- 93%
SevenZipExtractor_Extracting -- 94%
SevenZipExtractor_Extracting -- 95%
SevenZipExtractor_Extracting -- 96%
SevenZipExtractor_Extracting -- 97%
SevenZipExtractor_Extracting -- 98%
SevenZipExtractor_Extracting -- 99%
SevenZipExtractor_FileExtractionFinished -- 60% Filename:Microsoft - Visual Studio 6 MSDN Library.iso
SevenZipExtractor_FileExtractionStarted -- 80% Filename:New Microsoft Excel Worksheet.xlsx
SevenZipExtractor_FileExtractionFinished -- 80% Filename:New Microsoft Excel Worksheet.xlsx
SevenZipExtractor_FileExtractionStarted -- 100% Filename:New Text Document.txt
SevenZipExtractor_Extracting -- 100%
SevenZipExtractor_FileExtractionFinished -- 100% Filename:New Text Document.txt
似乎即使我正在尝试提取单个文件，它也会处理到目前为止的所有文件。当我尝试更大规模地使用它时（提取整个文件而不仅仅是一个文件），我将在根目录中有一个包含一个大文件和一堆小文件文件夹的存档，并在尝试时看到巨大的影响处理每个小文件（提取每个小文件所需的时间与提取存档根目录下的大文件所需的时间一样长。
用户是否期望在内存流中设置搜索点或其他内容？我怎样才能使提取一个小文本文件的时间不那么长？
我已经提交了 issue to the GitHub repo。在这一点上，我认为它要么是一个过去没有解决的错误，要么一次提取单个文件并不是提取整个档案的预期方法。在我的问题示例中，我的目标是尝试从存档中提取单个文件而不 class 处理整个文件（即使它最后只提取单个文件）。
在宏伟的计划中，我试图提取整个存档，一次处理一个文件（主要是因为我从引用的事件中获得的消息没有给我可靠的结果，例如一次只处理一个文件时间）手动。这可能不是提取存档的预期方法（可能只是另一种得到相同结果但从未使用过的方法，因此从不抱怨）。
我最终尝试使用以下方法成功提取整个档案。从上述事件中获取非常可靠的消息。我还向这个示例添加了更多内容（然后是我的问题），以使其成为完全可用的代码。我错误地遗漏了问题中的 inStream 参考。
#region SevenZipExtractor events
private void SevenZip_Processing(object sender, ProgressEventArgs e)
{
System.Diagnostics.Debug.WriteLine("SevenZip_Processing -- " + e.PercentDone + "%");
m_progress.UpdateProcessingStatus(e.PercentDone);
}
private void SevenZipExtractor_FileExtractionFinished(object sender, FileInfoEventArgs e)
{
System.Diagnostics.Debug.WriteLine("SevenZipExtractor_FileExtractionFinished -- " + e.PercentDone + "% Filename:" + e.FileInfo.FileName);
}
private void SevenZipExtractor_FileExtractionStarted(object sender, FileInfoEventArgs e)
{
System.Diagnostics.Debug.WriteLine("SevenZipExtractor_FileExtractionStarted -- " + e.PercentDone + "% Filename:" + e.FileInfo.FileName);
}
#endregion
private void DecompressThread(string archiveFilePath)
{
byte[] fileInBytes = File.ReadAllBytes(archiveFilePath);
using (MemoryStream inStream = new MemoryStream(fileInBytes))
{
using (SevenZipExtractor extractor = new SevenZipExtractor(inStream))
{
extractor.Extracting += SevenZip_Processing;
extractor.FileExtractionStarted += SevenZipExtractor_FileExtractionStarted;
extractor.FileExtractionFinished += SevenZipExtractor_FileExtractionFinished;
extractor.ExtractArchive("C:\Sandbox\Z-Test");
extractor.Extracting -= SevenZip_Processing;
extractor.FileExtractionStarted -= SevenZipExtractor_FileExtractionStarted;
extractor.FileExtractionFinished -= SevenZipExtractor_FileExtractionFinished;
}
}
}
结果是……
SevenZipExtractor_FileExtractionStarted -- 11% Filename:Test Folder 1
SevenZipExtractor_FileExtractionFinished -- 11% Filename:Test Folder 1
SevenZipExtractor_FileExtractionStarted -- 22% Filename:Test Folder 2
SevenZipExtractor_FileExtractionFinished -- 22% Filename:Test Folder 2
SevenZipExtractor_FileExtractionStarted -- 33% Filename:Microsoft - Visual Studio 6 MSDN Library.iso
SevenZip_Processing -- 20%
SevenZip_Processing -- 40%
SevenZip_Processing -- 60%
SevenZip_Processing -- 80%
SevenZipExtractor_FileExtractionFinished -- 33% Filename:Microsoft - Visual Studio 6 MSDN Library.iso
SevenZipExtractor_FileExtractionStarted -- 44% Filename:New Microsoft Excel Worksheet.xlsx
SevenZipExtractor_FileExtractionFinished -- 44% Filename:New Microsoft Excel Worksheet.xlsx
SevenZipExtractor_FileExtractionStarted -- 56% Filename:New Text Document.txt
SevenZipExtractor_FileExtractionFinished -- 56% Filename:New Text Document.txt
SevenZipExtractor_FileExtractionStarted -- 67% Filename:Test Folder 1\New Text Document In TF1 - Copy.txt
SevenZipExtractor_FileExtractionFinished -- 67% Filename:Test Folder 1\New Text Document In TF1 - Copy.txt
SevenZipExtractor_FileExtractionStarted -- 78% Filename:Test Folder 1\New Text Document In TF1.txt
SevenZipExtractor_FileExtractionFinished -- 78% Filename:Test Folder 1\New Text Document In TF1.txt
SevenZipExtractor_FileExtractionStarted -- 89% Filename:Test Folder 2\New Text Document In TF2 - Copy.txt
SevenZipExtractor_FileExtractionFinished -- 89% Filename:Test Folder 2\New Text Document In TF2 - Copy.txt
SevenZipExtractor_FileExtractionStarted -- 100% Filename:Test Folder 2\New Text Document In TF2.txt
SevenZip_Processing -- 100%
SevenZipExtractor_FileExtractionFinished -- 100% Filename:Test Folder 2\New Text Document In TF2.txt
我是另一个 SevenZipSharp 叉子的作者，终于有时间看看你的 issue. The reason you're getting so many file extraction events when just trying to extract one file is due to the fact that 7z archives are created using solid compression。
当您尝试从固定存档中提取单个文件时，解压缩会从文件的开头开始并遍历它，直到找到您要查找的文件。您的存档是最坏的情况，您要查找的文件位于存档的末尾（您的结果显示最后提取“新文本 Document.txt”）。
你的问题的解决方案取决于你最终需要实现什么，以及你对创建档案有多大的权力。如果您只需要提取一个文件，并且可以更改存档格式，我会瞄准一些不使用固体压缩的格式（例如 zip）。如果您被迫使用 7z 文件，并且需要使用其中的几个文件，最好的办法可能是将它们全部解压缩到一个临时目录并在那里进行处理。
可能只是我自己做错了什么，或者这可能是 class 的 预期结果 ，但我觉得有些地方不对劲...
我做了如下测试存档（文件夹里也有文件，但应该与本题无关）：
我使用follow方法提取单个文件(New Text Document.txt)...
#region SevenZipExtractor events
private void SevenZipExtractor_Extracting(object sender, ProgressEventArgs e)
{
System.Diagnostics.Debug.WriteLine("SevenZipExtractor_Extracting -- " + e.PercentDone + "%");
m_progress.UpdateProcessingStatus(e.PercentDone);
}
private void SevenZipExtractor_FileExtractionFinished(object sender, FileInfoEventArgs e)
{
System.Diagnostics.Debug.WriteLine("SevenZipExtractor_FileExtractionFinished -- " + e.PercentDone + "% Filename:" + e.FileInfo.FileName);
}
private void SevenZipExtractor_FileExtractionStarted(object sender, FileInfoEventArgs e)
{
System.Diagnostics.Debug.WriteLine("SevenZipExtractor_FileExtractionStarted -- " + e.PercentDone + "% Filename:" + e.FileInfo.FileName);
}
#endregion
private void DecompressThread()
{
using (SevenZipExtractor extractor = new SevenZipExtractor(inStream))
{
extractor.Extracting += SevenZipExtractor_Extracting;
extractor.FileExtractionStarted += SevenZipExtractor_FileExtractionStarted;
extractor.FileExtractionFinished += SevenZipExtractor_FileExtractionFinished;
using (FileStream file = new FileStream("C:\Sandbox\Z-Test\New Text Document.txt", FileMode.Create, FileAccess.Write))
{
extractor.ExtractFile(4, file);
}
extractor.Extracting -= SevenZipExtractor_Extracting;
extractor.FileExtractionStarted -= SevenZipExtractor_FileExtractionStarted;
extractor.FileExtractionFinished -= SevenZipExtractor_FileExtractionFinished;
}
}
然后使用事件 Extracting、FileExtractionStarted 和 FileExtractionFinished 我会 EXPECT 得到以下结果...
SevenZipExtractor_FileExtractionStarted -- 100% Filename:New Text Document.txt
SevenZipExtractor_Extracting -- 100%
SevenZipExtractor_FileExtractionFinished -- 100% Filename:New Text Document.txt
但是，我得到以下结果...
SevenZipExtractor_Extracting -- 100%
SevenZipExtractor_Extracting -- 100%
SevenZipExtractor_FileExtractionStarted -- 20% Filename:Test Folder 1
SevenZipExtractor_FileExtractionFinished -- 20% Filename:Test Folder 1
SevenZipExtractor_FileExtractionStarted -- 40% Filename:Test Folder 2
SevenZipExtractor_FileExtractionFinished -- 40% Filename:Test Folder 2
SevenZipExtractor_FileExtractionStarted -- 60% Filename:Microsoft - Visual Studio 6 MSDN Library.iso
SevenZipExtractor_Extracting -- 1%
SevenZipExtractor_Extracting -- 2%
SevenZipExtractor_Extracting -- 3%
SevenZipExtractor_Extracting -- 4%
SevenZipExtractor_Extracting -- 5%
SevenZipExtractor_Extracting -- 6%
SevenZipExtractor_Extracting -- 7%
SevenZipExtractor_Extracting -- 8%
SevenZipExtractor_Extracting -- 9%
SevenZipExtractor_Extracting -- 10%
SevenZipExtractor_Extracting -- 11%
SevenZipExtractor_Extracting -- 12%
SevenZipExtractor_Extracting -- 13%
SevenZipExtractor_Extracting -- 14%
SevenZipExtractor_Extracting -- 15%
SevenZipExtractor_Extracting -- 16%
SevenZipExtractor_Extracting -- 17%
SevenZipExtractor_Extracting -- 18%
SevenZipExtractor_Extracting -- 19%
SevenZipExtractor_Extracting -- 20%
SevenZipExtractor_Extracting -- 21%
SevenZipExtractor_Extracting -- 22%
SevenZipExtractor_Extracting -- 23%
SevenZipExtractor_Extracting -- 24%
SevenZipExtractor_Extracting -- 25%
SevenZipExtractor_Extracting -- 26%
SevenZipExtractor_Extracting -- 27%
SevenZipExtractor_Extracting -- 28%
SevenZipExtractor_Extracting -- 29%
SevenZipExtractor_Extracting -- 30%
SevenZipExtractor_Extracting -- 31%
SevenZipExtractor_Extracting -- 32%
SevenZipExtractor_Extracting -- 33%
SevenZipExtractor_Extracting -- 34%
SevenZipExtractor_Extracting -- 35%
SevenZipExtractor_Extracting -- 36%
SevenZipExtractor_Extracting -- 37%
SevenZipExtractor_Extracting -- 38%
SevenZipExtractor_Extracting -- 39%
SevenZipExtractor_Extracting -- 40%
SevenZipExtractor_Extracting -- 41%
SevenZipExtractor_Extracting -- 42%
SevenZipExtractor_Extracting -- 43%
SevenZipExtractor_Extracting -- 44%
SevenZipExtractor_Extracting -- 45%
SevenZipExtractor_Extracting -- 46%
SevenZipExtractor_Extracting -- 47%
SevenZipExtractor_Extracting -- 48%
SevenZipExtractor_Extracting -- 49%
SevenZipExtractor_Extracting -- 50%
SevenZipExtractor_Extracting -- 51%
SevenZipExtractor_Extracting -- 52%
SevenZipExtractor_Extracting -- 53%
SevenZipExtractor_Extracting -- 54%
SevenZipExtractor_Extracting -- 55%
SevenZipExtractor_Extracting -- 56%
SevenZipExtractor_Extracting -- 57%
SevenZipExtractor_Extracting -- 58%
SevenZipExtractor_Extracting -- 59%
SevenZipExtractor_Extracting -- 60%
SevenZipExtractor_Extracting -- 61%
SevenZipExtractor_Extracting -- 62%
SevenZipExtractor_Extracting -- 63%
SevenZipExtractor_Extracting -- 64%
SevenZipExtractor_Extracting -- 65%
SevenZipExtractor_Extracting -- 66%
SevenZipExtractor_Extracting -- 67%
SevenZipExtractor_Extracting -- 68%
SevenZipExtractor_Extracting -- 69%
SevenZipExtractor_Extracting -- 70%
SevenZipExtractor_Extracting -- 71%
SevenZipExtractor_Extracting -- 72%
SevenZipExtractor_Extracting -- 73%
SevenZipExtractor_Extracting -- 74%
SevenZipExtractor_Extracting -- 75%
SevenZipExtractor_Extracting -- 76%
SevenZipExtractor_Extracting -- 77%
SevenZipExtractor_Extracting -- 78%
SevenZipExtractor_Extracting -- 79%
SevenZipExtractor_Extracting -- 80%
SevenZipExtractor_Extracting -- 81%
SevenZipExtractor_Extracting -- 82%
SevenZipExtractor_Extracting -- 83%
SevenZipExtractor_Extracting -- 84%
SevenZipExtractor_Extracting -- 85%
SevenZipExtractor_Extracting -- 86%
SevenZipExtractor_Extracting -- 87%
SevenZipExtractor_Extracting -- 88%
SevenZipExtractor_Extracting -- 89%
SevenZipExtractor_Extracting -- 90%
SevenZipExtractor_Extracting -- 91%
SevenZipExtractor_Extracting -- 92%
SevenZipExtractor_Extracting -- 93%
SevenZipExtractor_Extracting -- 94%
SevenZipExtractor_Extracting -- 95%
SevenZipExtractor_Extracting -- 96%
SevenZipExtractor_Extracting -- 97%
SevenZipExtractor_Extracting -- 98%
SevenZipExtractor_Extracting -- 99%
SevenZipExtractor_FileExtractionFinished -- 60% Filename:Microsoft - Visual Studio 6 MSDN Library.iso
SevenZipExtractor_FileExtractionStarted -- 80% Filename:New Microsoft Excel Worksheet.xlsx
SevenZipExtractor_FileExtractionFinished -- 80% Filename:New Microsoft Excel Worksheet.xlsx
SevenZipExtractor_FileExtractionStarted -- 100% Filename:New Text Document.txt
SevenZipExtractor_Extracting -- 100%
SevenZipExtractor_FileExtractionFinished -- 100% Filename:New Text Document.txt
似乎即使我正在尝试提取单个文件，它也会处理到目前为止的所有文件。当我尝试更大规模地使用它时（提取整个文件而不仅仅是一个文件），我将在根目录中有一个包含一个大文件和一堆小文件文件夹的存档，并在尝试时看到巨大的影响处理每个小文件（提取每个小文件所需的时间与提取存档根目录下的大文件所需的时间一样长。
用户是否期望在内存流中设置搜索点或其他内容？我怎样才能使提取一个小文本文件的时间不那么长？
我已经提交了 issue to the GitHub repo。在这一点上，我认为它要么是一个过去没有解决的错误，要么一次提取单个文件并不是提取整个档案的预期方法。在我的问题示例中，我的目标是尝试从存档中提取单个文件而不 class 处理整个文件（即使它最后只提取单个文件）。
在宏伟的计划中，我试图提取整个存档，一次处理一个文件（主要是因为我从引用的事件中获得的消息没有给我可靠的结果，例如一次只处理一个文件时间）手动。这可能不是提取存档的预期方法（可能只是另一种得到相同结果但从未使用过的方法，因此从不抱怨）。
我最终尝试使用以下方法成功提取整个档案。从上述事件中获取非常可靠的消息。我还向这个示例添加了更多内容（然后是我的问题），以使其成为完全可用的代码。我错误地遗漏了问题中的 inStream 参考。
#region SevenZipExtractor events
private void SevenZip_Processing(object sender, ProgressEventArgs e)
{
System.Diagnostics.Debug.WriteLine("SevenZip_Processing -- " + e.PercentDone + "%");
m_progress.UpdateProcessingStatus(e.PercentDone);
}
private void SevenZipExtractor_FileExtractionFinished(object sender, FileInfoEventArgs e)
{
System.Diagnostics.Debug.WriteLine("SevenZipExtractor_FileExtractionFinished -- " + e.PercentDone + "% Filename:" + e.FileInfo.FileName);
}
private void SevenZipExtractor_FileExtractionStarted(object sender, FileInfoEventArgs e)
{
System.Diagnostics.Debug.WriteLine("SevenZipExtractor_FileExtractionStarted -- " + e.PercentDone + "% Filename:" + e.FileInfo.FileName);
}
#endregion
private void DecompressThread(string archiveFilePath)
{
byte[] fileInBytes = File.ReadAllBytes(archiveFilePath);
using (MemoryStream inStream = new MemoryStream(fileInBytes))
{
using (SevenZipExtractor extractor = new SevenZipExtractor(inStream))
{
extractor.Extracting += SevenZip_Processing;
extractor.FileExtractionStarted += SevenZipExtractor_FileExtractionStarted;
extractor.FileExtractionFinished += SevenZipExtractor_FileExtractionFinished;
extractor.ExtractArchive("C:\Sandbox\Z-Test");
extractor.Extracting -= SevenZip_Processing;
extractor.FileExtractionStarted -= SevenZipExtractor_FileExtractionStarted;
extractor.FileExtractionFinished -= SevenZipExtractor_FileExtractionFinished;
}
}
}
结果是……
SevenZipExtractor_FileExtractionStarted -- 11% Filename:Test Folder 1
SevenZipExtractor_FileExtractionFinished -- 11% Filename:Test Folder 1
SevenZipExtractor_FileExtractionStarted -- 22% Filename:Test Folder 2
SevenZipExtractor_FileExtractionFinished -- 22% Filename:Test Folder 2
SevenZipExtractor_FileExtractionStarted -- 33% Filename:Microsoft - Visual Studio 6 MSDN Library.iso
SevenZip_Processing -- 20%
SevenZip_Processing -- 40%
SevenZip_Processing -- 60%
SevenZip_Processing -- 80%
SevenZipExtractor_FileExtractionFinished -- 33% Filename:Microsoft - Visual Studio 6 MSDN Library.iso
SevenZipExtractor_FileExtractionStarted -- 44% Filename:New Microsoft Excel Worksheet.xlsx
SevenZipExtractor_FileExtractionFinished -- 44% Filename:New Microsoft Excel Worksheet.xlsx
SevenZipExtractor_FileExtractionStarted -- 56% Filename:New Text Document.txt
SevenZipExtractor_FileExtractionFinished -- 56% Filename:New Text Document.txt
SevenZipExtractor_FileExtractionStarted -- 67% Filename:Test Folder 1\New Text Document In TF1 - Copy.txt
SevenZipExtractor_FileExtractionFinished -- 67% Filename:Test Folder 1\New Text Document In TF1 - Copy.txt
SevenZipExtractor_FileExtractionStarted -- 78% Filename:Test Folder 1\New Text Document In TF1.txt
SevenZipExtractor_FileExtractionFinished -- 78% Filename:Test Folder 1\New Text Document In TF1.txt
SevenZipExtractor_FileExtractionStarted -- 89% Filename:Test Folder 2\New Text Document In TF2 - Copy.txt
SevenZipExtractor_FileExtractionFinished -- 89% Filename:Test Folder 2\New Text Document In TF2 - Copy.txt
SevenZipExtractor_FileExtractionStarted -- 100% Filename:Test Folder 2\New Text Document In TF2.txt
SevenZip_Processing -- 100%
SevenZipExtractor_FileExtractionFinished -- 100% Filename:Test Folder 2\New Text Document In TF2.txt
我是另一个 SevenZipSharp 叉子的作者，终于有时间看看你的 issue. The reason you're getting so many file extraction events when just trying to extract one file is due to the fact that 7z archives are created using solid compression。
当您尝试从固定存档中提取单个文件时，解压缩会从文件的开头开始并遍历它，直到找到您要查找的文件。您的存档是最坏的情况，您要查找的文件位于存档的末尾（您的结果显示最后提取“新文本 Document.txt”）。
你的问题的解决方案取决于你最终需要实现什么，以及你对创建档案有多大的权力。如果您只需要提取一个文件，并且可以更改存档格式，我会瞄准一些不使用固体压缩的格式（例如 zip）。如果您被迫使用 7z 文件，并且需要使用其中的几个文件，最好的办法可能是将它们全部解压缩到一个临时目录并在那里进行处理。