如何在C#中提取rar文件？

Question

我想使用 cmd shell 提取 .rar 文件，所以我编写了以下代码：

string commandLine = @"c:\progra~1\winrar\winrar e  c:\download\TestedU.rar c:\download";
ProcessStartInfo PSI = new ProcessStartInfo("cmd.exe");
PSI.RedirectStandardInput = true;
PSI.RedirectStandardOutput = true;
PSI.RedirectStandardError = true;
PSI.UseShellExecute = false;
Process p = Process.Start(PSI);
StreamWriter SW = p.StandardInput;
StreamReader SR = p.StandardOutput;
SW.WriteLine(commandLine);
SW.Close(); 

第一次运行正常，第二次则什么也不显示。

Answer 1

使用 SevenZipSharp 因为它比使用某些 .exe 更好。

private ReadOnlyCollection<string> ExtractArchive(string varPathToFile, string varDestinationDirectory) {
        ReadOnlyCollection<string> readOnlyArchiveFilenames;
        ReadOnlyCollection<string> readOnlyVolumeFilenames;
        varExtractionFinished = false;
        varExtractionFailed = false;
        SevenZipExtractor.SetLibraryPath(sevenZipDll);
        string fileName = "";
        string directory = "";
        Invoke(new SetNoArgsDelegate(() => {
                                         fileName = varPathToFile;
                                         directory = varDestinationDirectory;
                                     }));
        using (SevenZipExtractor extr = new SevenZipExtractor(fileName)) {
            //string[] test = extr.ArchiveFileNames.

            readOnlyArchiveFilenames = extr.ArchiveFileNames;
            readOnlyVolumeFilenames = extr.VolumeFileNames;
            //foreach (string dinosaur in readOnlyDinosaurs) {
            //MessageBox.Show(dinosaur);
            // }
            //foreach (string dinosaur in readOnlyDinosaurs1) {
            // // MessageBox.Show(dinosaur);
            // }
            try {
            extr.Extracting += extr_Extracting;
            extr.FileExtractionStarted += extr_FileExtractionStarted;
            extr.FileExists += extr_FileExists;
            extr.ExtractionFinished += extr_ExtractionFinished;

                extr.ExtractArchive(directory);
            } catch (FileNotFoundException error) {
                if (varExtractionCancel) {
                    LogBoxTextAdd("[EXTRACTION WAS CANCELED]");
                } else {
                    MessageBox.Show(error.ToString(), "Error with extraction");
                    varExtractionFailed = true;
                }
            }
        }
        varExtractionFinished = true;
        return readOnlyVolumeFilenames;
    }

  private void extr_FileExists(object sender, FileOverwriteEventArgs e) {
        listViewLogFile.Invoke(new SetOverwriteDelegate((args) => LogBoxTextAdd(String.Format("Warning: \"{0}\" already exists; overwritten\r\n", args.FileName))), e);
    }
    private void extr_FileExtractionStarted(object sender, FileInfoEventArgs e) {
        listViewLogFile.Invoke(new SetInfoDelegate((args) => LogBoxTextAdd(String.Format("Extracting \"{0}\"", args.FileInfo.FileName))), e);
    }
    private void extr_Extracting(object sender, ProgressEventArgs e) {
        progressBarCurrentExtract.Invoke(new SetProgressDelegate((args) => progressBarCurrentExtract.Increment(args.PercentDelta)), e);
    }
    private void extr_ExtractionFinished(object sender, EventArgs e) {
        Invoke(new SetNoArgsDelegate(() => {
                                         //pb_ExtractWork.Style = ProgressBarStyle.Blocks;
                                         progressBarCurrentExtract.Value = 0;
                                         varExtractionFinished = true;
                                         //l_ExtractProgress.Text = "Finished";
                                     }));
    }

当然，你需要稍微调整一下，并使用一些你自己的东西。但为了举例，我添加了一些额外的方法。

Answer 2

您可以跳过中间步骤并直接使用参数调用 winrar.exe，而不是首先实例化 cmd.exe

另外，您也可以查看 7-zip SDK

Answer 3

UnRar("C:\\Download\\sampleextractfolder\\", filepath2);

private static void UnRar(string WorkingDirectory, string filepath)
{

    // Microsoft.Win32 and System.Diagnostics namespaces are imported

    //Dim objRegKey As RegistryKey
    RegistryKey objRegKey;
    objRegKey = Registry.ClassesRoot.OpenSubKey("WinRAR\\Shell\\Open\\Command");
    // Windows 7 Registry entry for WinRAR Open Command

    // Dim obj As Object = objRegKey.GetValue("");
    Object obj = objRegKey.GetValue("");

    //Dim objRarPath As String = obj.ToString()
    string objRarPath = obj.ToString();
    objRarPath = objRarPath.Substring(1, objRarPath.Length - 7);

    objRegKey.Close();

    //Dim objArguments As String
    string objArguments;
    // in the following format
    // " X G:\Downloads\samplefile.rar G:\Downloads\sampleextractfolder\"
    objArguments = " X " + " " + filepath + " " + " " + WorkingDirectory;

    // Dim objStartInfo As New ProcessStartInfo()
    ProcessStartInfo objStartInfo = new ProcessStartInfo();

    // Set the UseShellExecute property of StartInfo object to FALSE
    //Otherwise the we can get the following error message
    //The Process object must have the UseShellExecute property set to false in order to use environment variables.
    objStartInfo.UseShellExecute = false;
    objStartInfo.FileName = objRarPath;
    objStartInfo.Arguments = objArguments;
    objStartInfo.WindowStyle = ProcessWindowStyle.Hidden;
    objStartInfo.WorkingDirectory = WorkingDirectory + "\\";

    //   Dim objProcess As New Process()
    Process objProcess = new Process();
    objProcess.StartInfo = objStartInfo;
    objProcess.Start();
    objProcess.WaitForExit();


    try
    {
        FileInfo file = new FileInfo(filepath);
        file.Delete();
    }
    catch (FileNotFoundException e)
    {
        throw e;
    }



}

Answer 4

您忘记添加读取错误的流。如果 WINRAR 运行正常，当您添加流来读取它时，您会发现错误输出。

Answer 5

我得到了答案。
试试这个：

 System.Diagnostics.Process proc = new System.Diagnostics.Process();
 //Put the path of installed winrar.exe
 proc.StartInfo.FileName = @"C:\Program Files\WinRAR\unrar.exe";
 proc.StartInfo.CreateNoWindow = true;
 proc.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
 proc.EnableRaisingEvents = true;

 //PWD: Password if the file has any
 //SRC: The path of your rar file. e.g: c:\temp\abc.rar
 //DES: The path you want it to be extracted. e.g: d:\extracted

 //ATTENTION: DESTINATION FOLDER MUST EXIST!

 proc.StartInfo.Arguments = String.Format("x -p{0} {1} {2}", PWD, SRC, DES);


 proc.Start();

Answer 6

正如 Kjartan 所建议的，根据您的用途，使用 7-Zip SDK 可能比生成外部可执行文件更好：

7-Zip SDK 是一个 C/C++ 库，但 http://sevenzipsharp.codeplex.com/ 有一个围绕 7-Zip SDK 的 .Net 库，这使得在 .NET 中使用更容易。

Answer 7

我们也可以用这个，

string SourceFile = @"G:\SourceFolder\125.rar";
string DestinationPath = @"G:\Destination\";
System.Diagnostics.Process process = new System.Diagnostics.Process();
process.StartInfo.FileName = @"G:\Software\WinRAR.exe";
process.StartInfo.CreateNoWindow = true;
process.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
process.EnableRaisingEvents = false;            
process.StartInfo.Arguments = string.Format("x -o+ \"{0}\" \"{1}\"", SourceFile, DestinationPath);
process.Start();

Answer 8

9 个答案，只有 sam mousavi 直接回答你的问题，但没有人告诉你出了什么问题。引用WinRAR手册：

...命令：WinRAR x Fonts *.ttf NewFonts\
将从存档 Fonts 中提取 *.ttf 文件到 NewFonts 文件夹
您需要使用尾部反斜杠（如上例所示）来表示目标文件夹。

而这正是 c:\download 中缺少的内容。现在，它尝试将存档内的文件 c:\download 提取到当前目录。它第一次如何运作仍然是个谜。

Answer 9

您可以直接使用此库： http://sevenziplib.codeplex.com/

SevenZipLib 是 7-zip 库的轻量级、易于使用的托管接口。