Wix:如何在自定义安装位置中执行DirectorySearch [英] Wix: How to do a DirectorySearch in a custom installation location

问题描述

我想检测用户在GUI中选择的自定义安装位置中是否已经存在目录.我尝试了以下方法:

I would like to detect if a directory already exists in a custom installation location selected by the user in the GUI. I tried the following:

<Property Id="DIRECTORY_PATH">
  <DirectorySearch Id="DirectorySearch" Path="[INSTALLDIR]\MyDirectory" />
</Property>

但是这不起作用，因为DirectorySearch发生在AppSearch期间.当稍后在InstallDirDlg中设置INSTALLDIR时.由于未为AppSearch及时设置INSTALLDIR，因此DIRECTORY_PATH错误地设置为"\ MyDirectory".

But this doesn't work because the DirectorySearch is happening during AppSearch. While INSTALLDIR is set later during InstallDirDlg. Since INSTALLDIR is not set in time for AppSearch, DIRECTORY_PATH is incorrectly set to "\MyDirectory".

当尝试通过InstallUISequence和InstallExecuteSequence进行AppSearch时，我尝试进行更改，但它只会让AppSearch在CostInitialize之前出现，而不是以后.

I tried to change when AppSearch happens with InstallUISequence and InstallExecuteSequence, but it will only let AppSearch come before CostInitialize, no later.

那么如何在用户选择的INSTALLDIR位置进行目录搜索?

So how do I do a directory search at the user selected INSTALLDIR location?

推荐答案

如果只需要等待用户的选择来验证该目录，则DirectorySearch不会为您完成这项工作.您必须在用户选择INSTALLDIR之后，例如在Next单击InstallDirDlg时立即编写设置属性"自定义操作.

If you only have to wait for the user's choice to verify that directory, then DirectorySearch won't do the job for you. You'll have to author a "set property" custom action right after the user chooses INSTALLDIR, for instance, on a Next click of InstallDirDlg.

更新.所以，我的意思基本上是:

UPDATE. So, I mean basically the following:

• 当用户进入设置的InstallDirDlg时，他/她将选择目录，该目录将置于INSTALLDIR属性中
• 然后对话框InstallDirDlg应该在下一步"按钮上触发自定义操作
• 此自定义操作应获取INSTALLDIR属性的值，并进行简单的文件系统检查INSTALLDIR是否包含MyDirectory
• 如果是，则将DIRECTORY_PATH属性设置为必要的值，例如session["DIRECTORY_PATH"] = session[INSTALLDIR] + "\MyDirectory";
• 否则，未设置DIRECTORY_PATH(您可以在任何条件下通过检查NOT DIRECTORY_PATH来使用此事实)

• when the user gets to the InstallDirDlg of your setup, he/she selects the directory, which is put to the INSTALLDIR property
• the dialog InstallDirDlg should then trigger a custom action on Next button
• this custom action should get the value of INSTALLDIR property, and do a simple file system check whether INSTALLDIR contains MyDirectory
• if it does, the DIRECTORY_PATH property is set to the necessary value, e.g. session["DIRECTORY_PATH"] = session[INSTALLDIR] + "\MyDirectory";
• otherwise, DIRECTORY_PATH is not set (and you can use this fact in any condition by checking NOT DIRECTORY_PATH)

希望它变得更清晰

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