打开使用 System.IO.Compression 创建的 ZipArchive 时，C# .NET 缺少方法异常

Question

我有一个 C# WinForms .NET 应用程序，我在其中尝试写入 zip 存档并使用 System.IO.Compression 从中读取。

现在我创建了 ziarchive:

    public void SaveStdV20ZipProject(string strfilepath, clsProjectInfo GameInfo)
    {
        using (var ms = new MemoryStream())
        {
            using (var archive = new ZipArchive(ms, ZipArchiveMode.Create, true))
            {
                string strProjectData = String.Empty;
                StringBuilder sb = new StringBuilder();

                // First, we add the Game Info data...
                sb.AppendLine(GameInfo.strGameVersion);
                sb.AppendLine(GameInfo.strProjectType);
                sb.AppendLine(GameInfo.strGameTitle);
                sb.AppendLine(GameInfo.strAuthor);
                sb.AppendLine(GameInfo.strCreationDate);
                sb.AppendLine(GameInfo.blTSImagePresent.ToString());
                sb.AppendLine(GameInfo.blTSAudioPresent.ToString());
                sb.AppendLine(GameInfo.blTSVideoPresent.ToString());
                sb.AppendLine(GameInfo.blFSSImagePresent.ToString());
                sb.AppendLine(GameInfo.blFSSAudioPresent.ToString());
                sb.AppendLine(GameInfo.blFSSVideoPresent.ToString());
                sb.AppendLine(GameInfo.intTotalQuestions.ToString());
                sb.AppendLine(GameInfo.intTotalMediaItems.ToString());
                sb.AppendLine(GameInfo.intTotalCategories.ToString());
                sb.AppendLine(GameInfo.blTiebreakerPresent.ToString());

                // Next, create an archive entry for the Game Data string...
                strProjectData = sb.ToString();

                var ProjectData = archive.CreateEntry("ProjectData.txt");

                using (var entryStream = ProjectData.Open())
                using (var streamWriter = new StreamWriter(entryStream))
                {
                    streamWriter.Write(strProjectData);
                }

                // We're done writing all the data for this project. Now let's write it to the file...
                using (var fileStream = new FileStream(@strfilepath, FileMode.Create))
                {
                    ms.Seek(0, SeekOrigin.Begin);
                    ms.CopyTo(fileStream);
                }
            }
        }
    }

这是我打开它的方式:

    public void OpenStdV20ZipProject(string strfilepath)
    {
        string zipPath = strfilepath;
        string extractPath = Path.GetTempFileName();

        using (ZipArchive archive = ZipFile.OpenRead(zipPath))
        {
            foreach (ZipArchiveEntry entry in archive.Entries)
            {
                if (entry.FullName.EndsWith(".txt", StringComparison.OrdinalIgnoreCase))
                {
                    using (StreamReader sr = new StreamReader(extractPath))
                    {
                        clsProjInfo.strGameVersion = (string)sr.ReadLine();
                        clsProjInfo.strProjectType = (string)sr.ReadLine();
                        clsProjInfo.strGameTitle = (string)sr.ReadLine();
                        clsProjInfo.strAuthor = (string)sr.ReadLine();
                        clsProjInfo.strCreationDate = (string)sr.ReadLine();
                        clsProjInfo.blTSImagePresent = Convert.ToBoolean(sr.ReadLine());
                        clsProjInfo.blTSAudioPresent = Convert.ToBoolean(sr.ReadLine());
                        clsProjInfo.blTSVideoPresent = Convert.ToBoolean(sr.ReadLine());
                        clsProjInfo.blFSSImagePresent = Convert.ToBoolean(sr.ReadLine());
                        clsProjInfo.blFSSAudioPresent = Convert.ToBoolean(sr.ReadLine());
                        clsProjInfo.blFSSVideoPresent = Convert.ToBoolean(sr.ReadLine());
                        clsProjInfo.intTotalQuestions = Convert.ToInt32(sr.ReadLine());
                        clsProjInfo.intTotalMediaItems = Convert.ToInt32(sr.ReadLine());
                        clsProjInfo.intTotalCategories = Convert.ToInt32(sr.ReadLine());
                        clsProjInfo.blTiebreakerPresent = Convert.ToBoolean(sr.ReadLine());
                    }
                }
            }
        }
    }         // <-THIS IS LINE 1320

它抛出一个 Missing Method Exception，我在 Internet 上四处寻找修复方法。这是堆栈跟踪:

System.MissingMethodException occurred
  HResult=0x80131513
  Message=Method not found: 'System.IO.Compression.ZipArchive       System.IO.Compression.ZipFile.OpenRead(System.String)'.
  Source=TASv20ClsLib
  StackTrace:
   at TASv20ClsLib.clsOpenStandardProject.OpenStdV20ZipProject(String strfilepath) in C:\Users\Reuben\Documents\Visual Studio 2017\Projects\C# Projects\TRIVIA AUTHOR SUITE V20 PROJECTS 2\TAS v20 Zip Test Jun14 2\TASv20ClsLib\Class1.cs:line 1320
   at Trivia_Author_v20.frmMain.openV20ProjectToolStripMenuItem_Click(Object sender, EventArgs e) in C:\Users\Reuben\Documents\Visual Studio 2017\Projects\C# Projects\TRIVIA AUTHOR SUITE V20 PROJECTS 2\TAS v20 Zip Test Jun14 2\Trivia Author v10 New Approach\frmMain.cs:line 1627
   at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
   at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
   at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e,     ToolStripItemEventType met)
   at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
   at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ToolStrip.WndProc(Message& m)
   at System.Windows.Forms.ToolStripDropDown.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
   at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.Run(Form mainForm)
   at Trivia_Author_v20.Program.Main(String[] args) in C:\Users\Reuben\Documents\Visual Studio 2017\Projects\C# Projects\TRIVIA AUTHOR SUITE V20 PROJECTS 2\TAS v20 Zip Test Jun14 2\Trivia Author v10 New Approach\Program.cs:line 126

Answer 1

ZipFile.OpenRead(string) 方法仅在 .NET 4.5 中添加。它在以前的版本中不存在。

您的问题不清楚您的项目针对哪个版本的 .NET，也不清楚您尝试运行它的地方安装了哪个版本的 .NET，但毫无疑问，您的目标是 .NET 4.5 或更高版本，但正在尝试运行仅安装了旧版本 .NET 的代码。

要解决此问题，请确保在要运行代码的计算机上安装了 .NET 4.5，或者使用较旧的 API。例如，您可以轻松编写自己的 OpenRead(string) 方法:

ZipArchive OpenRead(string filename)
{
    return new ZipArchive(File.OpenRead(filename), ZipArchiveMode.Read);
}
}