C# WiX：卸载时正确删除非空临时文件和文件夹

在我开始之前，让我注意到，我在这里讨论了所有相关问题，但没有找到解决方案。因此，这个问题的目的与许多人以前的问题相同：

当应用程序使用WiX工具工作时，如何正确删除正在创建的临时文件夹和杂项文件

到目前为止，我想出了以下方法：

使用CustomAction（例如，用C#编写）可以简单地删除所有文件和文件夹（这非常有效，但在我看来，这种解决方法无效，因为不支持从MSI端回滚）

使用util:RemoveFolderEx标记从wixutileExtension移除。我做不到

在卸载之前，使用将填充MSI DB表（目录和移除文件）的自定义操作（同样用C#编写）。这将迫使MSI通过RemoveFiles默认操作以自己的方式正确卸载所有枚举文件和文件夹（理论上它应该这样做）

我已将重点放在第三种方式上，并在此向您寻求一些帮助。

关于应用程序布局的几点注意事项 我构建的MSI可以很好地处理程序文件、快捷方式、注册表和所有这些东西。但在安装过程中，我将一些配置文件放入

C:\ProgramData\MyApp\

文件夹（它们也将被删除，没有任何问题）

但是，当应用程序运行时，它会在

C:\ProgramData\MyApp\

中生成额外的文件和目录，用于在新版本可用时更新应用程序。让我们假设用户在更新过程中间关闭应用程序，并希望卸载应用程序。下面是我们目前在

C:\ProgramData\MyApp

文件夹中的内容：

C:\ProgramData\MyApp\
C:\ProgramData\MyApp\Temp\
C:\ProgramData\MyApp\Temp\tool.exe
C:\ProgramData\MyApp\Temp\somelib.dll
C:\ProgramData\MyApp\Temp\\someliba.dll

---

C:\ProgramData\MyApp\Temp\据我所知，您没有正确填充RemoveFile表。如果您记录了确切的SQL插入字符串以查看真正的内容，这会有所帮助。我认为您得到了错误2727，因为插入中的第四件事应该是一个目录属性，它引用MSI文件中的目录表。它不是一个真正的目录名——它应该是MSI文件目录表中的一个键——从代码中我可以看出，它是一个实际的目录，而不是目录表中的一个值

是的，你说得对。我确实在RemoveFile表中放入了一个真实的（不是目录标识符）。我也认为这是错误的，但是如果我不知道目录的名称，也不能更新目录表，那么如何为目录设置有效的ID（而不是路径）？我不会假设您需要更新目录表。我猜那里已经有一个目录，与要删除的文件的位置相关。或者它是一个标准的Windows文件夹，比如AppDataFolder，您可以添加目录表而不会引起任何问题。让我澄清一下。我在目录表中有

C:\ProgramData\MyApp

和

C:\ProgramData\MyApp\Temp

项。但是如何为以下文件夹添加条目：

C:\ProgramData\MyApp\Temp\6889D79E-EA63-42C8-A81D-7AF62A2B1E4F

？在新的更新过程开始之前，我不知道它的名称——它将只在运行时才被知道。稍后我需要删除该目录中的所有文件。我是否缺少smth？不，目录表中没有它们：）目录表中有一个引用它们的条目。插入字符串中的DirProperty必须引用该目录键。类似地，我假设AddConfigurationFilesFolder实际上是组件表中的一个组件条目。您的意思是，包含-

\Temp

和

\Temp\{GUID}

的顶级目录？是的，我有一个条目（

SETTINGSINSTALLFOLDER

）。我试图为每个子目录指向该条目，但没有成功

AddConfigurationFilesFolder

实际上是一个在

SETTINGSINSTALLFOLDER

文件夹中定义的组件ID，它的条目位于组件表中。

<Product Id=...>
  ...
  <!-- Defines a DLL contains the RemoveUpdatesAction function -->
  <Binary Id="RemoveUpdatesAction.CA.dll" src="RemoveUpdatesAction.CA.dll" />
  <CustomAction Id="RemoveUpdatesAction" 
                Return="check" 
                Execute="immediate" 
                BinaryKey="RemoveUpdatesAction.CA.dll" 
                DllEntry="RemoveUpdatesAction" />
  ...
  <InstallExecuteSequence>
    <!-- Perform custom CleanUp only on 'UnInstall' action - see condition -->
    <Custom Action='RemoveUpdatesAction' Before='RemoveFiles'>
        (NOT UPGRADINGPRODUCTCODE) AND (REMOVE="ALL")    
    </Custom>
  </InstallExecuteSequence>
  ...
</Product>

<Fragment>
  <Directory Id="TARGETDIR" Name="SourceDir">
    ....
    <!-- ...\Program Files\MyApp\ -->
    <Directory Id="ProgramFilesFolder">
      <Directory Id="APPINSTALLFOLDER" Name="MyApp" />
    </Directory>

    ....

    <!-- This is it! ...\ProgramData\MyApp\ -->
    <Directory Id="CommonAppDataFolder">
      <Directory Id="SETTINGSINSTALLFOLDER" Name="MyApp" />
    </Directory>
    ....
  </Directory>
</Fragment>

... a lot of different stuff here ...

<Fragment>
  <Component Id="AddConfigurationFilesFolder" ...>
  ...
  <!-- This component just serves as a bound point - see below -->
  ...
</Fragment>

public class CustomActions
{
    [CustomAction]
    public static ActionResult RemoveUpdatesAction(Session session)
    {
        try
        {
            // Provide unique IDs
            int indexFile = 1;
            int indexDir = 1;

            // Begin work
            session.Log("Begin RemoveUpdatesAction");

            // Bind to the component that for sure will be uninstalled during UnInstall action
            // You can see this component mentioned above
            const string componentId = "AddConfigurationFilesFolder";

            // Get '..\{ProgramData}\MyApp' folder
            // This property (SETTINGSINSTALLFOLDER) is mentioned too
            string appDataFolder = session["SETTINGSINSTALLFOLDER"];

            // Populate RemoveFile table in MSI database with all files 
            // created in '..\{ProgramData}\MyApp\*.*' folder - pls see notes at the beginning
            if (!Directory.Exists(appDataFolder))
            {
              session.Log("End RemoveUpdatesAction");
              return ActionResult.Success;
            }

            foreach (var directory in Directory.GetDirectories(appDataFolder, "*", SearchOption.AllDirectories))
            {
                session.Log("Processing Subdirectory {0}", directory);
                foreach (var file in Directory.EnumerateFiles(directory))
                {
                    session.Log("Processing file {0}", file);

                    string keyFile = string.Format("CLEANFILE_{0}", indexFile);

                    // Set values for columns in RemoveFile table:
                    // {1}: FileKey => just unique ID for the row
                    // {2}: Component_ => reference to a component existed in Component table
                    //      In our case it is already mentioned 'AddConfigurationFilesFolder' 
                    // {3}: FileName => localizable name of the file to be removed (with ext.)
                    // {4}: DirProperty => reference to a full dir path
                    // {5}: InstallMode => 3 means remove on Install/Remove stage
                    var fieldsForFiles = new object[] { keyFile, componentId, Path.GetFileName(file), directory, 3 };

                    // The following files will be processed:
                    // 1. '..\ProgramData\MyApp\Temp\tool.exe'
                    // 2. '..\ProgramData\MyApp\Temp\somelib.dll'
                    // 3. '..\ProgramData\MyApp\Temp\<UniqueFolderNameBasedOnGUID>\someliba.dll'
                    // 4. '..\ProgramData\MyApp\Temp\<UniqueFolderNameBasedOnGUID>\somelibb.dll'
                    InsertRecord(session, "RemoveFile", fieldsForFiles);

                    indexFile++;
                }

                string keyDir = string.Format("CLEANDIR_{0}", indexDir);

                // Empty quotes mean we we want to delete the folder itself
                var fieldsForDir = new object[] { keyDir, componentId, "", directory, 3 };

                // The following paths will be processed:
                // 1. '..\ProgramData\MyApp\Temp\'
                // 2. '..\ProgramData\MyApp\Temp\<UniqueFolderNameBasedOnGUID>\'
                InsertRecord(session, "RemoveFile", fieldsForDir);

                indexDir++;
            }

            session.Log("End RemoveUpdatesAction");
            return ActionResult.Success;
        }
        catch (Exception exception)
        {
            session.Log("RemoveUpdatesAction EXCEPTION:" + exception.Message);
            return ActionResult.Failure;
        }
    }

    // Took completely from another SO question, but is accoring to MSDN docs
    private static void InsertRecord(Session session, string tableName, Object[] objects)
    {
        Database db = session.Database;
        string sqlInsertSring = db.Tables[tableName].SqlInsertString + " TEMPORARY";
        View view = db.OpenView(sqlInsertSring);
        view.Execute(new Record(objects));
        view.Close();
    }
}

MSI (s) (B4:28) [05:28:39:427]: Doing action: RemoveUpdatesAction
....
MSI (s) (B4:4C) [05:28:39:450]: Invoking remote custom action. DLL: C:\WINDOWS\Installer\MSI7643.tmp,    Entrypoint:     RemoveUpdatesAction
....  
Action start 5:28:39: RemoveUpdatesAction.  
SFXCA: Extracting custom action to temporary directory: C:\WINDOWS\Installer\MSI7643.tmp-\  
SFXCA: Binding to CLR version v4.0.30319  
Calling custom action RemoveUpdatesAction!RemoveUpdatesAction.CustomActions.RemoveUpdatesAction  
Begin RemoveUpdatesAction  
Processing Subdirectory C:\ProgramData\MyApp\Temp  
Processing file C:\ProgramData\MyApp\Temp\somelib.dll  
Processing file C:\ProgramData\MyApp\Temp\tool.exe  
Processing Subdirectory C:\ProgramData\MyApp\Temp\48574917-4351-4d4c-a36c-381f3ceb2e56  
Processing file C:\ProgramData\MyApp\Temp\48574917-4351-4d4c-a36c-381f3ceb2e56\someliba.dll  
Processing file C:\ProgramData\MyApp\Temp\48574917-4351-4d4c-a36c-381f3ceb2e56\somelibb.dll  
End RemoveUpdatesAction  
MSI (s) (B4:28) [05:28:39:602]: Doing action: RemoveFiles  
MSI (s) (B4:28) [05:28:39:602]: Note: 1: 2205 2:  3: ActionText   
Action ended 5:28:39: RemoveUpdatesAction. Return value 1.  
Action start 5:28:39: RemoveFiles.  
MSI (s) (B4:28) [05:28:39:607]: Note: 1: 2727 2: C:\ProgramData\MyApp\Temp   
MSI (s) (B4:28) [05:28:39:607]: Note: 1: 2727 2: C:\ProgramData\MyApp\Temp\48574917-4351-4d4c-a36c-381f3ceb2e56   
MSI (s) (B4:28) [05:28:39:607]: Counted 2 foreign folders to be removed.  
MSI (s) (B4:28) [05:28:39:607]: Removing foreign folder: C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Compass Mobile\  
MSI (s) (B4:28) [05:28:39:607]: Removing foreign folder: C:\ProgramData\MyApp\  
MSI (s) (B4:28) [05:28:39:607]: Doing action: RemoveFolders  
MSI (s) (B4:28) [05:28:39:607]: Note: 1: 2205 2:  3: ActionText   
Action ended 5:28:39: RemoveFiles. Return value 1.  
Action start 5:28:39: RemoveFolders.