威克斯 - 删除旧的程序文件夹之前安装(wix - remove old program folde

我需要安装程序来删除旧的安装目录（如果存在的话），就在安装程序开始复制新文件。此文件夹包含了一些文件和程序的使用过程中产生的子文件夹，它们不包括在安装程序。正因为如此，我已经创建自定义操作来做到这一点。

因此，一些代码。首先，自定义操作代码（没有什么特别的存在）：

[CustomAction]
        public static ActionResult RemoveOldDatabase(Session session)
        {

            bool removeDatabase = session.CustomActionData["RemoveDatabase"] == "true";
            string installDir = session.CustomActionData["InstallDir"];

            if (removeDatabase)
            {
                try
                {
                    Directory.Delete(installDir, true);
                }
                catch (Exception ex)
                {
                    session.Log(ex.StackTrace);
                }
            }

            return ActionResult.Success;
        }

和威克斯代码（它定义自定义操作调用）：

<CustomAction Id="actionCheckServerName" BinaryKey="actionBinary" DllEntry="CheckServerName" Execute="immediate" Return="check" />
        <CustomAction Id="actionInstall" BinaryKey="actionBinary" DllEntry="Install" Execute="deferred" HideTarget="no" Impersonate ="no" Return="check"/>
        <CustomAction Id="actionUninstall" BinaryKey="actionBinary" DllEntry="Uninstall" Execute="deferred" HideTarget="no" Impersonate ="no" Return="check"/>

        <CustomAction Id="actionRemoveOldDatabase" BinaryKey="actionBinary" DllEntry="RemoveOldDatabase" Execute="deferred" HideTarget="no" Impersonate ="no" Return="ignore"/>


        <CustomAction Id="actionGetNetworkComputers" BinaryKey="actionBinary" DllEntry="GetNetworkComputers" Execute="immediate" Return="check"/>

        <CustomAction Id="SetInstallParameters" Return="check" Property="actionInstall" Value="InstallDir=[INSTALLDIR];ServerName=[SERVER_LIST];InstallMode=[SETUP_MODE];Single=[single];RemoveDatabase=[REMOVE_DATABASE]" />
        <CustomAction Id="SetUninstallParameters" Return="check" Property="actionUninstsall" Value="UnInstallDir=[INSTALLDIR];ServerName=[SERVER_LIST];UnInstallMode=[INSTALL_MODE]" />

        <CustomAction Id="SetRemoveOldDatabaseParameters" Return="check" Property="actionRemoveOldDatabase" Value="InstallDir=[INSTALLDIR];RemoveDatabase=[REMOVE_DATABASE]" />


        <InstallExecuteSequence>
            <Custom Action='AlreadyUpdated' After='FindRelatedProducts'>SELFFOUND</Custom>
            <Custom Action='NoDowngrade' After='FindRelatedProducts'>NEWERFOUND</Custom>

            <Custom Action="SetRemoveOldDatabaseParameters" Before="ProcessComponents"/>
            <Custom Action="actionRemoveOldDatabase" After="SetRemoveOldDatabaseParameters">NOT Installed AND NOT UPGRADINGPRODUCTCODE</Custom>

            <Custom Action="SetInstallParameters" Before="actionInstall"/>
            <Custom Action="SetUninstallParameters" Before="RemoveFiles">Installed AND NOT REINSTALL AND NOT UPGRADINGPRODUCTCODE</Custom>
            <Custom Action="actionInstall" Before="InstallFinalize">NOT Installed AND NOT UPGRADINGPRODUCTCODE</Custom>
            <Custom Action="actionUninstall" After="SetUninstallParameters">Installed AND NOT REINSTALL AND NOT UPGRADINGPRODUCTCODE</Custom>
        </InstallExecuteSequence>

有什么问题？正如你所看到的，actionRemoveOldDatabase应该安装程序开始复制新文件（已经SetRemoveOldDatabaseParameters设置paremeters）之前trigerred。所以-只有旧文件应删除-但是这不会发生。如果我这样做事，行动actionRemoveOldDatabase，安装目录将被安装后复制新文件将其删除。所以- 由安装程序复制所有的新文件将被删除 。

我不为什么已了解？如何删除旧的只有已经存在的文件夹，为什么我的自定义操作将删除所有文件复制？

[编辑]看来我已经知道原因。在这种情况下，安装目录正在使用中（可能是Windows安装程序将其锁定），安装结束后，它的释放。自定义操作会等到文件夹被释放，然后删除它。可惜的是，为时已晚 - 文件夹中已包含新文件。

你知道有什么解决方法吗？

该RemoveFile元素是专门做正是这一点。您可以使用此教MSI删除它没有安装应用程序数据。其优点是回滚该文件将在地方被放回时。

您也可以使用RemoveFolder元素删除整个目录。一般的概念是*的文件删除，还可以指定文件夹。所以你需要为可能得到也创造任何子目录做到这一点，这是不是递归。

编写自定义的行动只是重新发明轮子，并增加安装的脆弱性。当子目录不能事先知道它应该只被使用。在这种情况下理想的故事是使用临时行的MSI对行动态地排放到MSI在安装时，让MSI手柄西娅实际删除。这使得回滚功能仍然正常。

这里是什么看起来像一个非常简单的版本。它可以通过使其从定制表格，而不是为ComponentID以及DirectoryID常量字符串数据驱动得到改善。

 public class RecursiveDeleteCustomAction
    {

        [CustomAction]
        public static ActionResult RecursiveDeleteCosting(Session session)
        {
            // SOMECOMPONENTID is the Id attribute of a component in your install that you want to use to trigger this happening
            const string ComponentID = "SOMECOMPONENTID";
            // SOMEDIRECTORYID would likely be INSTALLDIR or INSTALLLOCATION depending on your MSI
            const string DirectoryID = "SOMEDIRECTORYID";

            var result = ActionResult.Success;
            int index = 1;

            try
            {
                string installLocation = session[DirectoryID];
                session.Log("Directory to clean is {0}", installLocation);

                // Author rows for root directory
                // * means all files
                // null means the directory itself
                var fields = new object[] { "CLEANROOTFILES", ComponentID, "*", DirectoryID, 3 };
                InsertRecord(session, "RemoveFile", fields);
                fields = new object[] { "CLEANROOTDIRECTORY", ComponentID, "", DirectoryID, 3 };
                InsertRecord(session, "RemoveFile", fields);

                if( Directory.Exists(installLocation))
                {
                    foreach (string directory in Directory.GetDirectories(installLocation, "*", SearchOption.AllDirectories))
                    {
                        session.Log("Processing Subdirectory {0}", directory);
                        string key = string.Format("CLEANSUBFILES{0}", index);
                        string key2 = string.Format("CLEANSUBDIRECTORY{0}", index);
                        session[key] = directory;

                        fields = new object[] { key, ComponentID, "*", key, 3 };
                        InsertRecord(session, "RemoveFile", fields);

                        fields = new object[] { key2, ComponentID, "", key, 3 };
                        InsertRecord(session, "RemoveFile", fields);

                        index++;     
                    }
                }
            }
            catch (Exception ex)
            {
                session.Log(ex.Message);
                result = ActionResult.Failure;
            }

            return result;
        }
        private static void InsertRecord(Session session, string tableName, Object[] objects)
        {
            Database db = session.Database; 
            string sqlInsertSring = db.Tables[tableName].SqlInsertString + " TEMPORARY";
            session.Log("SqlInsertString is {0}", sqlInsertSring);
            View view = db.OpenView(sqlInsertSring); 
            view.Execute(new Record(objects)); 
            view.Close(); 
        }
    }