问题
I have a C# WinForms .NET app in which I'm trying to write to a zip archive and read from it using System.IO.Compression.
Here's now I create the ziparchive:
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);
}
}
}
}
And here's how I open it:
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
It throws a Missing Method Exception and I've looked high and low in the Internet for a fix. Here's the stack trace:
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
回答1:
The ZipFile.OpenRead(string) method was added only in .NET 4.5. It does not exist in previous versions.
Your question is not clear about which version of .NET your project targets, nor which version of .NET is installed where you are trying to run it, but undoubtedly, you have targeted .NET 4.5 or higher, but are trying to run the code on which only an older version of .NET is installed.
To fix this, either make sure .NET 4.5 is installed on the machine where you want to run the code, or use the older API. For example, you can write your own OpenRead(string) method without much difficulty:
ZipArchive OpenRead(string filename)
{
return new ZipArchive(File.OpenRead(filename), ZipArchiveMode.Read);
}
}
回答2:
This is part of a whole host of binding issues introduced in 4.6x versions of .Net Framework. It may work somewhere, but not other places.
Most of this is related binding redirect issues that they have had between 4.6.1 and 4.7.1. Fixed in 4.7.2. These issues usually manifest themselves when working in the Framework and referencing .Net Standard packages
It is addressed in this framework issue: https://github.com/dotnet/corefx/issues/7702
Your best bet is to use binding redirects in your .Config file, or upgrade to .Net Framework 4.7.2 or later
回答3:
Here i used Ionic and its working good, You can use
You need to import Ionic.zip to your project.
using (var zip = Ionic.Zip.ZipFile.Read("YourFilePAth")) { enter code here };
来源：https://stackoverflow.com/questions/44556298/c-sharp-net-missing-method-exception-when-opening-ziparchive-created-with-syste