Monotouch - ICSharpCode.SharpZipLib 出现错误

Question

大家好，

我正在尝试使用 ICSharpCode.SharpZipLib 库生成 Zip 文件，但它抛出了一个非常奇怪的错误。

代码：

public static void ZipFiles(string inputFolderPath, string outputPathAndFile, string password)       
{
        ArrayList ar = GenerateFileList(inputFolderPath); // generate file list
        int TrimLength = (Directory.GetParent(inputFolderPath)).ToString().Length;

        TrimLength += 1; //remove '\'
        FileStream ostream;
        byte[] obuffer;

        ZipOutputStream oZipStream = new ZipOutputStream(File.Create(outputPathAndFile)); // create zip stream
        if (password != null && password != String.Empty)
            oZipStream.Password = password;
        oZipStream.SetLevel(9); // maximum compression
        ZipEntry oZipEntry;
        foreach (string Fil in ar) // for each file, generate a zipentry
        {
            oZipEntry = new ZipEntry(Fil.Remove(0, TrimLength));
            oZipStream.PutNextEntry(oZipEntry);

            if (!Fil.EndsWith(@"/")) // if a file ends with '/' its a directory
            {
                ostream = File.OpenRead(Fil);
                obuffer = new byte[ostream.Length];
                ostream.Read(obuffer, 0, obuffer.Length);
                oZipStream.Write(obuffer, 0, obuffer.Length);
            }
        }
        oZipStream.Finish();
        oZipStream.Close();
}


private static ArrayList GenerateFileList(string Dir)
{
        ArrayList fils = new ArrayList();
        bool Empty = true;
        foreach (string file in Directory.GetFiles(Dir,"*.xml")) // add each file in directory
        {
            fils.Add(file);
            Empty = false;
        }

        if (Empty)
        {
            if (Directory.GetDirectories(Dir).Length == 0)
                // if directory is completely empty, add it
            {
                fils.Add(Dir + @"/");
            }
        }

        foreach (string dirs in Directory.GetDirectories(Dir)) // recursive
        {
            foreach (object obj in GenerateFileList(dirs))
            {
                fils.Add(obj);
            }
        }
        return fils; // return file list
}

错误：

Unhandled Exception: System.NotSupportedException: CodePage 437 not supported
  at System.Text.Encoding.GetEncoding (Int32 codepage) [0x00000] in <filename unknown>:0 
  at ICSharpCode.SharpZipLib.Zip.ZipConstants.ConvertToArray (System.String str) [0x00000] in <filename unknown>:0 
  at ICSharpCode.SharpZipLib.Zip.ZipConstants.ConvertToArray (Int32 flags, System.String str) [0x00000] in <filename unknown>:0 
  at ICSharpCode.SharpZipLib.Zip.ZipOutputStream.PutNextEntry (ICSharpCode.SharpZipLib.Zip.ZipEntry entry) [0x00000] in <filename unknown>:0 
  at WpfPrototype1.MainInvoicesView.ZipFiles (System.String inputFolderPath, System.String outputPathAndFile, System.String password) [0x00000] in <filename unknown>:0 
  at WpfPrototype1.MainInvoicesView.<ViewDidLoad>m__6 (System.Object , System.EventArgs ) [0x00000] in <filename unknown>:0 
  at MonoTouch.UIKit.UIControlEventProxy.Activated () [0x00000] in <filename unknown>:0 
  at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr)
  at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x00000] in <filename unknown>:0 
  at MonoTouch.UIKit.UIApplication.Main (System.String[] args) [0x00000] in <filename unknown>:0 
  at WpfPrototype1.Application.Main (System.String[] args) [0x00000] in <filename unknown>:0 

如何使此代码支持 CodePage 437？

问候，
克劳迪奥

Answer 1

MonoTouch 删除了它无法静态确定您需要的 I18N 代码页。在这种情况下，您可以通过以下两种方式之一强制 monotouch 保留所需的代码页集合（West）：

1. 单击 Project->[ProjectName] Options
2. 选择 iPhone Build
3. 此时您有两个选项
   一个。从 I18n 程序集列表中选择“west”
   b.将“-i18n=west”添加到“额外参数”中

注意：您需要对每个配置和平台组合执行步骤 #3。

Answer 2

我知道这是一个旧线程，但我刚刚花了一个下午尝试用 monodroid 4.6 修复这个问题。在以前的版本中，技巧是手动添加对 I18N 和 I18N.WEST 库的引用，但现在从版本 4.6 开始，它不再起作用了。 :(

所以我对 SharpZipLib 的 ZipConstants.cs 文件进行了修复：

从：

static int defaultCodePage = Thread.CurrentThread.CurrentCulture.TextInfo.OEMCodePage;

到：

static int defaultCodePage = System.Text.Encoding.UTF8.CodePage;