在安装时检测目录的存在 [英] Detecting the presence of a directory at install time

问题描述

在WiX中，DirectorySearch可用于确定目标计算机上是否存在特定目录.但是我不知道是否有一致的方法来确定目录不存在.

In WiX DirectorySearch can be used to determine if a specific directory exists on the target computer. But I don't understand if there's a consistent way to determine that a directory does not exist.

例如:

<Property Id="INSTALLDIR" Secure="yes">
  <RegistrySearch Id='InstallDir' Type='directory'
    Root='HKLM' Key='Software\Company\Product\Install' Name='InstallPath'/>
</Property>
<Property Id='IS_INSTALLED' Secure='yes'>
  <DirectorySearch Id='IsInstalled' Path='[INSTALLDIR]' />
</Property>

当注册表项和目录同时存在时，将IS_INSTALLED属性设置为DirectorySearch返回的路径.

When both the registry key and the directory exist, the IS_INSTALLED property is set to the path returned by DirectorySearch.

当目录不存在时，IS_INSTALLED似乎设置为"C:\".

When the directory does not exist, IS_INSTALLED appears to be set to "C:\".

是类似这样的情况:

<Condition>NOT (IS_INSTALLED = "C:\")</Condition>

检测目录是否已找到的可靠方法?有更好的方法吗?

a reliable way to detect that the directory was found? Is there a better way?

答案:这是基于我接受的 mrnxs答案的WiX代码

Answer: Here is WiX code based on mrnxs answer that I accepted

<Property Id="PRODUCT_IS_INSTALLED" Secure="yes">
  <RegistrySearch Id='RegistrySearch1' Type='directory'
    Root='HKLM' Key='Software\Company\Product\Version\Install' Name='Path'>
    <DirectorySearch Id='DirectorySearch1' Path='[PRODUCT_IS_INSTALLED]'/>
  </RegistrySearch>
</Property>

<CustomAction Id='SET_INSTALLDIR'
              Property='INSTALLDIR'
              Value='[PRODUCT_IS_INSTALLED]'/>

<InstallExecuteSequence>
  <Custom Action='SET_INSTALLDIR' After='AppSearch'></Custom>
</InstallExecuteSequence>

推荐答案

通常，当该属性用作基于属性的文件夹时，会发生这种情况.在这种情况下，CostFinalize操作会自动将属性设置为有效路径(例如"C:\")，以便Windows Installer可以使用该文件夹.

Usually this happens when the property is used as a property-based folder. In this case the CostFinalize action automatically sets the property to a valid path (for example "C:\") so the folder can be used by Windows Installer.

由于此路径是自动生成的，因此您不能确定在所有客户端计算机上该路径都将是"C:\"，因此您不应在情况中使用此值.相反，您可以尝试以下方法:

Since this path is generated automatically, you cannot be sure that it will be "C:\" on all your client machines, so you shouldn't use this value in your condition. Instead, you can try this:

• 为文件夹使用自定义属性
• 使用类型 51个自定义操作 (使用格式文本设置的属性)将此属性设置为有效的默认路径(例如"[ProgramFilesFolder] MyCompany \ MyProduct")
• 使用其他属性进行搜索
• 使用其他类型51自定义操作将folder属性设置为您的搜索属性

• use a custom property for your folder
• use a type 51 custom action (property set with formatted text) to set this property to a valid default path (for example "[ProgramFilesFolder]MyCompany\MyProduct")
• use another property for the search
• use another type 51 custom action to set the folder property to your search property

例如，如果搜索为IS_INSTALLED，则文件夹可以使用IS_INSTALLED_PATH.可以将IS_INSTALLED_PATH设置为默认路径，并且在AppSearch操作之后，如果搜索发现某些内容，则可以将其设置为IS_INSTALLED.

For example, if your search is IS_INSTALLED your folder can use IS_INSTALLED_PATH. IS_INSTALLED_PATH can be set to a default path and after AppSearch action you can set it to IS_INSTALLED if the search found something.

您可以通过这种方式进行调节:

This way you can use for conditioning:

IS_INSTALLED

或

NOT IS_INSTALLED

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