Question

我的项目中有一项要求我需要解压缩一些zip文件夹。我用google搜索并且在不使用外部库的情况下开始知道我无法实现此功能，或者使用GzipStream类我们可以解压缩.gz个文件。

有没有办法在不使用任何外部库的情况下解压缩？

PS：我只需要使用脚本任务组件，而.Net框架是3.0。

提前致谢。

Answer 1

A）将变量FileName声明为字符串数据类型

B）使用ForEach循环遍历文件夹中的文件并将文件名映射到FileName变量

C）使用执行流程任务压缩/解压缩到单个文件

D）执行包

对于steb by step短指南，请参阅http://sqlserversolutions.blogspot.com/2008/10/zip-and-unzip-files-in-folder.html

您可能还想查看此http://gallery.technet.microsoft.com/Unzipping-with-SSIS-Script-6b055183

Answer 2

我不想使用7zip方法或外部库，因为这使得部署SSIS包稍微复杂一些。所以我对@StackTrace引用的Gallery Script以及documented here和here采用了类似的方法。我已经有一个脚本任务执行其他逻辑，所以我只需要C＃代码来执行它。我发现脚本任务正在MTA线程上执行，但Shell32代码需要使用STA线程执行，所以我最终得到了这段代码。希望能帮助别人：

/// <summary>
/// Ugh! SSIS runs script tasks on MTA threads but Shell32 only wants to 
/// run on STA thread. So start a new STA thread to call UnZip, block 
/// till it's done, then return. 
/// We use Shell32 since .net 2 doesn't have ZipFile and we prefer not to 
/// ship other dlls as they normally need to be deployed to the GAC. So this 
/// is easiest, although not very pretty.
/// </summary>
/// <param name="zipFile">File to unzip</param>
/// <param name="folderPath">Folder to put the unzipped files</param>
public static void UnZipFromMTAThread(string zipFile, string folderPath)
{
    object[] args = new object[] { zipFile, folderPath };
    if (Thread.CurrentThread.GetApartmentState() == ApartmentState.STA)
    {
        UnZip(args);
    }
    else
    {
        Thread staThread = new Thread(new ParameterizedThreadStart(UnZip));
        staThread.SetApartmentState(ApartmentState.STA);
        staThread.Start(args);
        staThread.Join();
    }
}

/// <summary>
/// From http://www.fluxbytes.com/csharp/unzipping-files-using-shell32-in-c/ but with 
/// args packed in object array so can be called from new STA Thread in UnZipFromMTAThread().
/// </summary>
/// <param name="param">object array containing: [string zipFile, string destinationFolderPath]</param>
public static void UnZip(object param)
{
    object[] args = (object[]) param;
    string zipFile = (string)args[0];
    string folderPath = (string)args[1];


    if (!File.Exists(zipFile))
        throw new FileNotFoundException();

    if (!Directory.Exists(folderPath))
        Directory.CreateDirectory(folderPath);

    Shell32.Shell objShell = new Shell32.Shell();
    Shell32.Folder destinationFolder = objShell.NameSpace(folderPath);
    Shell32.Folder sourceFile = objShell.NameSpace(zipFile);

    foreach (var file in sourceFile.Items())
    {
        // Flags are: No progress displayed, Respond with 'Yes to All' for any dialog, no UI on error
        // I added 1024 too although not sure it's relevant with Zip files. 
        // See https://msdn.microsoft.com/en-us/library/windows/desktop/bb787866%28v=vs.85%29.aspx?f=255&MSPPError=-2147217396
        destinationFolder.CopyHere(file, 4 | 16 | 1024); 
    }
}

然后你可以从脚本任务的其他地方调用它，如下所示：

string zipFilename = "C:\\temp\\awesome-zip-file.zip";
string targetDirectory = "C:\\temp\\my-output-folder";
UnZipFromMTAThread(zipFilename, targetDirectory);

如何使用SSIS脚本任务C＃2005或2008解压缩包含多个文件的文件夹？

2 个答案: