无法将 WiX 属性设置为等于属性文件中的属性

我可能患有“有时会得病”，但我可以发誓，上次我涉足 WiX 时，建议有一个单独的文件来设置属性，以便以后引用（如果这些属性中的任何一个不是本意的）是静态的。基本上，在构建序列开始之前根据需要更新它们。

所以基本上，我正在尝试：

1. 将属性文件加载到 WiX 项目中（完成）
2. 创建一个 WiX 属性，该属性等于该属性文件中的属性之一（已阻止）
3. 在根据需要安装的过程中引用该值（被阻止程序阻止，但this https://stackoverflow.com/questions/30668723/wix-toolset-how-to-set-a-property如果我被#3 阻止，一旦#2 被解除阻止，也许可以帮助我)

现在，由于尝试错误地引用变量而出现错误，我无法构建，Undefined preprocessor variable '$(var.FOO)'.当不尝试时它构建得很好。我尝试过使用sys and env代替var也。我也尝试使用[FOO]但这似乎是按字面意思处理的，就像在检查构建日志时一样，TESTVAR等于[FOO]代替Bar。我不明白为什么$(var.FOO)没工作。我想我误解了this http://wixtoolset.org/documentation/manual/v3/overview/preprocessor.html文档。

所以我不确定我做错了什么，甚至不知道如何寻找正确的方法来做到这一点。我曾经跑过一些问题 https://stackoverflow.com/questions/12052457/wix-property-from-a-custom-action-into-a-wix-variable这可能会带来有用的答案，但它们与阻碍潜在答案的不可能性有关，例如在安装开始时尝试使用不可变的 WiX 属性作为可变属性。

它与默认模板 WiX 4 项目没什么区别，但我在下面包含了所有源文件：

变量属性

<?xml version="1.0" encoding="utf-8"?>
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
  <PropertyGroup>
    <FOO>Bar</FOO>
  </PropertyGroup>
</Project>

新安装测试.wixproj

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" DefaultTargets="Build" InitialTargets="EnsureWixToolsetInstalled" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <Import Project="vars.properties" />
  <PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">x86</Platform>
    <ProductVersion>3.9</ProductVersion>
    <ProjectGuid>75fa9a4b-ddfe-44a6-8b03-2f26612b3339</ProjectGuid>
    <SchemaVersion>2.0</SchemaVersion>
    <OutputName>NewSetupTest</OutputName>
    <OutputType>Package</OutputType>
    <WixTargetsPath Condition=" '$(WixTargetsPath)' == '' ">$(MSBuildExtensionsPath)\WiX Toolset\v4\wix.targets</WixTargetsPath>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x86' ">
    <OutputPath>bin\$(Configuration)\</OutputPath>
    <IntermediateOutputPath>obj\$(Configuration)\</IntermediateOutputPath>
    <DefineConstants>Debug</DefineConstants>
    <VerboseOutput>False</VerboseOutput>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x86' ">
    <OutputPath>bin\$(Configuration)\</OutputPath>
    <IntermediateOutputPath>obj\$(Configuration)\</IntermediateOutputPath>
  </PropertyGroup>
  <ItemGroup>
    <Compile Include="Product.wxs" />
  </ItemGroup>
  <ItemGroup>
    <Content Include="vars.properties" />
  </ItemGroup>
  <Import Project="$(WixTargetsPath)" Condition=" Exists('$(WixTargetsPath)') " />
  <Target Name="EnsureWixToolsetInstalled" Condition=" !Exists('$(WixTargetsPath)') ">
    <Error Text="The WiX Toolset v4 build tools must be installed to build this project. To download the WiX Toolset v4, see http://wixtoolset.org/releases/" />
  </Target>
  <!--
    To modify your build process, add your task inside one of the targets below and uncomment it.
    Other similar extension points exist, see Wix.targets.
    <Target Name="BeforeBuild">
    </Target>
    <Target Name="AfterBuild">
    </Target>
    -->
</Project>

产品.wxs

<?xml version="1.0" encoding="UTF-8"?>
<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
    <Product Id="7E5959E4-664D-4D24-9B45-BA2697CA303B"
            Name="NewSetupTest"
            Language="1033"
            Version="1.0.0.3"
            Manufacturer="ACME"
            UpgradeCode="A38ABDBE-2D5F-450D-97EE-19C5A018101B">
        <Package InstallerVersion="200"
              Compressed="yes"
              InstallScope="perMachine" Platform="x64" />

        <MajorUpgrade DowngradeErrorMessage="A newer version of [ProductName] is already installed." AllowSameVersionUpgrades="yes"/>
        <MediaTemplate />

        <Feature Id="ProductFeature"
              Title="NewSetupTest"
              Level="1">
            <ComponentGroupRef Id="ProductComponents" />
        </Feature>
    </Product>

    <Fragment>
        <Directory Id="TARGETDIR"
                Name="SourceDir">
            <Directory Id="ProgramFilesFolder64">
                <Directory Id="INSTALLFOLDER"
                    Name="NewSetupTest" />
            </Directory>
        </Directory>
    </Fragment>

    <Fragment>
    <Property Id="TESTVAR" Secure="yes" Value="$(var.FOO)" />
        <ComponentGroup Id="ProductComponents"
                      Directory="INSTALLFOLDER">
            <!-- TODO: Remove the comments around this Component element and the ComponentRef below in order to add resources to this installer. -->
            <!-- <Component Id="ProductComponent"> -->
                <!-- TODO: Insert files, registry keys, and other resources here. -->
            <!-- </Component> -->
        </ComponentGroup>
    <InstallExecuteSequence>
      <ScheduleReboot After="InstallFinalize">NOT (TESTVAR = "Bar")</ScheduleReboot>
    </InstallExecuteSequence>
    </Fragment>
</Wix>

除了设置 msbuild 属性（您的 vars.properties）之外，您还必须在 .wixproj 下分配 Candle 预处理器变量<DefineConstants>以便它们可以在您的 wix 项目中使用。 这应该可以解决你的问题Undefined preprocessor variable '$(var.FOO)'

<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x86' ">
    <OutputPath>bin\$(Configuration)\</OutputPath>
    <IntermediateOutputPath>obj\$(Configuration)\</IntermediateOutputPath>
    <DefineConstants>Debug;FOO=$(FOO)</DefineConstants>
    <VerboseOutput>False</VerboseOutput>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x86' ">
    <OutputPath>bin\$(Configuration)\</OutputPath>
    <IntermediateOutputPath>obj\$(Configuration)\</IntermediateOutputPath>
    <DefineConstants>FOO=$(FOO)</DefineConstants>
</PropertyGroup>