我提前为冗长的回答道歉：
我建议将您的网站和内容保留在两个单独的功能中，然后让它们选择通过 UI 或命令行参数提供安装所需的任何变量。如果您使用"Remember Property" pattern，那么您可以回忆在更改或升级安装时使用的变量（通读最后的 cmets，有一种稍微简单的方法）。
这允许安装产品的人使用给定变量设置所有内容，或自行设置 IIS 网站并仅安装网站内容。
这也与 MajorUpgrades 配合得很好。我目前在您提供的代码中没有看到升级信息，因此您应该查看MajorUpgrades vs patches（主要升级更容易）
<MajorUpgrade AllowDowngrades="no" AllowSameVersionUpgrades="yes" Schedule="afterInstallInitialize" DowngradeErrorMessage="A later version of of this product is already installed. Setup will now exit."/>
请记住，通过 $(var.name) 访问的变量在 MSI 编译时使用，而通过括号 [MY_VARIABLE] 访问的公共变量在安装时使用。公共变量可以通过 MSI UI 公开，或通过命令行提供给 msiexec（我将其用于静默安装和/或指定日志文件）
以下是以下示例的摘要：
-
Configuration.wxi - 该文件实现了“记住”的属性
-
Product.wxs - 与您的大部分相似，但也包括 MajorUpgrades、网站和内容的单独功能以及包含 UiFlow
-
IISConfiguration.wxs - 包含 IIS 网站、AppPool 和 AppPool 用户的片段，使用安装时提供的变量
-
UIFlow.wxs - 定义要使用的 UI 流程，它使用 WixUI FeatureTree 插件，您的 UI 可能需要其他东西
-
UIDialogs.wxs - 这是安装中使用的变量暴露给 UI 的地方
Configuration.wxi：
<?xml version="1.0" encoding="utf-8" ?>
<Include xmlns="http://schemas.microsoft.com/wix/2006/wi" xmlns:iis="http://schemas.microsoft.com/wix/IIsExtension"
xmlns:util="http://schemas.microsoft.com/wix/UtilExtension" xmlns:netfx="http://schemas.microsoft.com/wix/NetFxExtension">
<!-- The RegistrySearch elements will populate these properties with values from the registry IF they exist there, otherwise the default values will be used -->
<Property Id="REG_WEBSITE_NAME" Value="WebsiteName" >
<RegistrySearch Id="WEB_WEBSITE_NAME_Remembered" Root="HKLM" Key="SOFTWARE\PRODUCT_NAME" Name="Website_Name" Type="raw" />
</Property>
<Property Id="REG_WEB_APP_POOL_NAME" Value="PoolName" >
<RegistrySearch Id="WEB_APP_POOL_NAME_Remembered" Root="HKLM" Key="SOFTWARE\PRODUCT_NAME" Name="WebApp_PoolName" Type="raw" />
</Property>
<Property Id="REG_WEB_APP_POOL_IDENTITY_DOMAIN">
<RegistrySearch Id="WEB_APP_POOL_IDENTITY_DOMAIN_Remembered" Root="HKLM" Key="SOFTWARE\PRODUCT_NAME" Name="WebApp_PoolIdentityDomain" Type="raw" />
</Property>
<Property Id="REG_WEB_APP_POOL_IDENTITY_USERNAME" Value="NetworkService" >
<RegistrySearch Id="WEB_APP_POOL_IDENTITY_USERNAME_Remembered" Root="HKLM" Key="SOFTWARE\PRODUCT_NAME" Name="WebApp_PoolIdentityUsername" Type="raw" />
</Property>
<!-- Notice that the password is NOT stored in the registry and is hidden so it's not shown in logs -->
<Property Id="WEB_APP_POOL_IDENTITY_PWD" Hidden="yes" />
<!-- This is the compnent that actually writes the values to the registry on install -->
<Component Id="C_RegistryEntries" Directory="INSTALLLOCATION">
<RegistryValue Root="HKLM" Key="SOFTWARE\ProviderWebsites" Name="Website_Name" Type="string" Value="[WEBSITE_NAME]"/>
<RegistryValue Root="HKLM" Key="SOFTWARE\ProviderWebsites" Name="WebApp_PoolName" Type="string" Value="[WEB_APP_POOL_NAME]"/>
<RegistryValue Root="HKLM" Key="SOFTWARE\ProviderWebsites" Name="WebApp_PoolIdentityDomain" Type="string" Value="[WEB_APP_POOL_IDENTITY_DOMAIN]"/>
<RegistryValue Root="HKLM" Key="SOFTWARE\ProviderWebsites" Name="WebApp_PoolIdentityUsername" Type="string" Value="[WEB_APP_POOL_IDENTITY_USERNAME]"/>
</Component>
<!-- These CustomActions set the property that are used for the install from the registry values (These actions are only run under the conditions in the sequences below) -->
<CustomAction Id='SetWebAppName' Property='WEBSITE_NAME' Value='[REG_WEBSITE_NAME]'/>
<CustomAction Id='SetWebAppPoolName' Property='WEB_APP_POOL_NAME' Value='[REG_WEB_APP_POOL_NAME]'/>
<CustomAction Id='SetWebAppPoolIdentityDomain' Property='WEB_APP_POOL_IDENTITY_DOMAIN' Value='[REG_WEB_APP_POOL_IDENTITY_DOMAIN]'/>
<CustomAction Id='SetWebAppPoolIdentityUsername' Property='WEB_APP_POOL_IDENTITY_USERNAME' Value='[REG_WEB_APP_POOL_IDENTITY_USERNAME]'/>
<!-- The CustomActions above that set the variables used in the installation are only run if they were not supplied by the command line -->
<InstallUISequence>
<Custom Action='SetWebAppName' After='AppSearch'>REG_WEBSITE_NAME AND (NOT WEBSITE_NAME)</Custom>
<Custom Action='SetWebAppPoolName' After='AppSearch'>REG_WEB_APP_POOL_NAME AND (NOT WEB_APP_POOL_NAME)</Custom>
<Custom Action='SetWebAppPoolIdentityDomain' After='AppSearch'>REG_WEB_APP_POOL_IDENTITY_DOMAIN AND (NOT WEB_APP_POOL_IDENTITY_DOMAIN)</Custom>
<Custom Action='SetWebAppPoolIdentityUsername' After='AppSearch'>REG_WEB_APP_POOL_IDENTITY_USERNAME AND (NOT WEB_APP_POOL_IDENTITY_USERNAME)</Custom>
</InstallUISequence>
<InstallExecuteSequence>
<!-- After='RemoveExistingProducts' is used under this sequence because of the use of MajorUpgrades -->
<Custom Action='SetWebAppName' After='RemoveExistingProducts'>REG_WEBSITE_NAME AND (NOT WEBSITE_NAME)</Custom>
<Custom Action='SetWebAppPoolName' After='RemoveExistingProducts'>REG_WEB_APP_POOL_NAME AND (NOT WEB_APP_POOL_NAME)</Custom>
<Custom Action='SetWebAppPoolIdentityDomain' After='RemoveExistingProducts'>REG_WEB_APP_POOL_IDENTITY_DOMAIN AND (NOT WEB_APP_POOL_IDENTITY_DOMAIN)</Custom>
<Custom Action='SetWebAppPoolIdentityUsername' After='RemoveExistingProducts'>REG_WEB_APP_POOL_IDENTITY_USERNAME AND (NOT WEB_APP_POOL_IDENTITY_USERNAME)</Custom>
</InstallExecuteSequence>
</Include>
产品.wxs：
<?xml version="1.0" encoding="UTF-8"?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi" xmlns:iis="http://schemas.microsoft.com/wix/IIsExtension"
xmlns:util="http://schemas.microsoft.com/wix/UtilExtension" xmlns:netfx="http://schemas.microsoft.com/wix/NetFxExtension">
<!--NEVER EVER EVER EVER CHANGE THE UPGRADE CODE!!!!!!!!!!!!!!! -->
<?define UpgradeCode="PUT-GUID-HERE" ?>
<Product Id="*" Name="ProductName" Language="1033" Version="X.X.X.X" Manufacturer="XYZ" UpgradeCode="$(var.UpgradeCode)">
<Package InstallerVersion="200" Compressed="yes" />
<!-- This includes our properties that implement the "Remember Property" pattern -->
<?include Configuration.wxi ?>
<Media Id="1" Cabinet="media.cab" EmbedCab="yes" />
<MajorUpgrade AllowDowngrades="no" AllowSameVersionUpgrades="yes" Schedule="afterInstallInitialize"
DowngradeErrorMessage="A later version of this product is already installed. Setup will now exit."/>
<!-- Creating default directory structure (INSTALLLOCATION be override by user, but it starts in Program Files) -->
<Directory Id="TARGETDIR" Name="SourceDir">
<Directory Id='ProgramFilesFolder' Name='PFiles'>
<Directory Id="INSTALLLOCATION" Name="TheDefaultInstallFolderName">
</Directory>
</Directory>
</Directory>
<Feature Id="F_Content" Title="Content" Level="1" Description="The website content" ConfigurableDirectory="INSTALLLOCATION">
<ComponentRef Id="C_RegistryEntries"/>
<!-- The C_WebAppContent can either be generated by the WiX tool "heat", or a hand-crafted set of content, this component is not included in this example -->
<ComponentGroupRef Id="C_WebAppContent" />
</Feature>
<Feature Id="F_IISWebsite" Title="IIS Website" Description="The IIS website and application pool" Level="1">
<ComponentRef Id="C_IISWebsite" />
</Feature>
<InstallExecuteSequence>
</InstallExecuteSequence>
<!-- Specify UI -->
<UIRef Id="UIFlow" />
</Product>
</Wix>
IISConfiguration.wxs：
<?xml version="1.0" encoding="utf-8" ?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi" xmlns:iis="http://schemas.microsoft.com/wix/IIsExtension"
xmlns:util="http://schemas.microsoft.com/wix/UtilExtension">
<Fragment>
<DirectoryRef Id="INSTALLLOCATION">
<Component Id="C_IISWebsite" Guid="{PUT-GUID-HERE}" KeyPath="yes">
<!-- This does not create a user, it's just an object that's referenced by the WebAppPool component -->
<util:User Id="WebAppPoolUser" CreateUser="no" Name="[WEB_APP_POOL_IDENTITY_USERNAME]"
Password="[WEB_APP_POOL_IDENTITY_PWD]" Domain="[WEB_APP_POOL_IDENTITY_DOMAIN]"/>
<!-- The "Identity" attritbute below needs to be set to "other" to use the util:User defined above -->
<iis:WebAppPool Id="WebAppPool" Name="[WEB_APP_POOL_NAME]" Identity="other" User="WebAppPoolUser"/>
<iis:WebSite Id="DefaultWebSite" Description="[WEBSITE_NAME]" Directory="INSTALLLOCATION" >
<iis:WebAddress Id="AllUnassigned" Port="80"/>
</iis:WebSite>
<iis:WebVirtualDir Id="My.VirtualDir" Alias="App" Directory="INSTALLLOCATION" WebSite="DefaultWebSite">
<iis:WebApplication Id="Application" Name="App" WebAppPool="WebAppPool"/>
</iis:WebVirtualDir>
</Component>
</DirectoryRef>
</Fragment>
</Wix>
UIFlow.wxs：
<?xml version="1.0" encoding="utf-8" ?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi">
<Fragment>
<UI Id="UIFlow">
<!-- This uses the WixUI plugin -->
<UIRef Id="WixUI_FeatureTree" />
<UIRef Id="WixUI_ErrorProgressText" />
<!-- Injection of custom UI. -->
<DialogRef Id="IisSetupDlg" />
<Publish Dialog="LicenseAgreementDlg" Control="Next" Event="NewDialog" Value="IisSetupDlg" Order="3">LicenseAccepted = "1"</Publish>
<Publish Dialog="CustomizeDlg" Control="Back" Event="NewDialog" Value="PoolSettingsDlg">1</Publish>
</UI>
</Fragment>
</Wix>
UIDialogs.wxs：
<?xml version="1.0" encoding="utf-8" ?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi">
<Fragment>
<UI>
<Dialog Id="IisSetupDlg" Width="370" Height="270" Title="IIS Settings - [ProductName]" NoMinimize="yes">
<!-- Web App details prompt -->
<Control Id="WebsiteNameLabel" Type="Text" X="45" Y="53" Width="100" Height="15" TabSkip="no" Text="&Website Name:" />
<Control Id="WebsiteNameEdit" Type="Edit" X="45" Y="65" Width="220" Height="18" Property="WEBSITE_NAME" Text="{80}" />
<!-- Back button -->
<Control Id="Back" Type="PushButton" X="180" Y="243" Width="56" Height="17" Text="&Back">
<Publish Event="NewDialog" Value="LicenseAgreementDlg">1</Publish>
</Control>
<Control Id="Next" Type="PushButton" X="236" Y="243" Width="56" Height="17" Default="yes" Text="&Next">
<Publish Event="NewDialog" Value="PoolSettingsDlg">
<!--if settings are correct, allow next dialog-->
<![CDATA[WEBSITE_NAME <> ""]]>
</Publish>
</Control>
<Control Id="Cancel" Type="PushButton" X="304" Y="243" Width="56" Height="17" Cancel="yes" Text="Cancel">
<Publish Event="SpawnDialog" Value="CancelDlg">1</Publish>
</Control>
<Control Id="BannerBitmap" Type="Bitmap" X="0" Y="0" Width="370" Height="44" TabSkip="no" Text="WixUI_Bmp_Banner" />
<Control Id="Description" Type="Text" X="25" Y="23" Width="280" Height="15" Transparent="yes" NoPrefix="yes">
<Text>Please enter IIS Configuration</Text>
</Control>
<Control Id="BottomLine" Type="Line" X="0" Y="234" Width="370" Height="0" />
<Control Id="Title" Type="Text" X="15" Y="6" Width="200" Height="15" Transparent="yes" NoPrefix="yes">
<Text>{\WixUI_Font_Title}IIS Settings</Text>
</Control>
<Control Id="BannerLine" Type="Line" X="0" Y="44" Width="370" Height="0" />
</Dialog>
<Dialog Id="PoolSettingsDlg" Width="370" Height="300" Title="Application Pool Settings - [ProductName]" NoMinimize="yes">
<!-- name of the application pool -->
<Control Id="PoolNameLabel" Type="Text" X="45" Y="53" Width="100" Height="15" TabSkip="no" Text="&Pool name:" />
<Control Id="PoolNameEdit" Type="Edit" X="45" Y="65" Width="220" Height="18" Property="WEB_APP_POOL_NAME" Text="{80}" />
<!-- domain -->
<Control Id="DomainPoolLabel" Type="Text" X="45" Y="85" Width="100" Height="15" TabSkip="no" Text="&Domain for AppPool:" />
<Control Id="DomainPoolEdit" Type="Edit" X="45" Y="97" Width="220" Height="18" Property="WEB_APP_POOL_IDENTITY_DOMAIN" Text="{80}" />
<!-- Login -->
<Control Id="LoginPoolLabel" Type="Text" X="45" Y="117" Width="100" Height="15" TabSkip="no" Text="&Login for AppPool:" />
<Control Id="LoginPoolEdit" Type="Edit" X="45" Y="129" Width="220" Height="18" Property="WEB_APP_POOL_IDENTITY_USERNAME" Text="{80}" />
<!-- Password -->
<Control Id="PasswordPoolLabel" Type="Text" X="45" Y="149" Width="100" Height="15" TabSkip="no" Text="&Password for AppPool:" />
<Control Id="PasswordPoolEdit" Type="Edit" X="45" Y="161" Width="220" Height="18" Property="WEB_APP_POOL_IDENTITY_PWD" Text="{80}" Password="yes" />
<!-- Back button -->
<Control Id="Back" Type="PushButton" X="180" Y="264" Width="56" Height="17" Text="&Back">
<Publish Event="NewDialog" Value="IisSetupDlg">1</Publish>
</Control>
<Control Id="Next" Type="PushButton" X="236" Y="264" Width="56" Height="17" Default="yes" Text="&Next">
<Publish Event="NewDialog" Value="CustomizeDlg">
<!--if settings are correct, allow next dialog-->
<![CDATA[WEB_APP_POOL_NAME <> ""
or WEB_APP_POOL_IDENTITY_DOMAIN <> ""
or WEB_APP_POOL_IDENTITY_USERNAME <> ""
or WEB_APP_POOL_IDENTITY_PWD <> ""]]>
</Publish>
</Control>
<Control Id="Cancel" Type="PushButton" X="304" Y="264" Width="56" Height="17" Cancel="yes" Text="Cancel">
<Publish Event="SpawnDialog" Value="CancelDlg">1</Publish>
</Control>
<Control Id="BannerBitmap" Type="Bitmap" X="0" Y="0" Width="370" Height="44" TabSkip="no" Text="WixUI_Bmp_Banner" />
<Control Id="Description" Type="Text" X="25" Y="23" Width="280" Height="15" Transparent="yes" NoPrefix="yes">
<Text>Please enter AppPool Configuration for IIS</Text>
</Control>
<Control Id="BottomLine" Type="Line" X="0" Y="255" Width="370" Height="0" />
<Control Id="Title" Type="Text" X="15" Y="6" Width="200" Height="15" Transparent="yes" NoPrefix="yes">
<Text>{\WixUI_Font_Title}Application Pool Settings</Text>
</Control>
<Control Id="BannerLine" Type="Line" X="0" Y="44" Width="370" Height="0" />
</Dialog>
</UI>
</Fragment>
</Wix>