小编use*_*369的帖子

我使用Wix,并有一个customAction和一个anb installSequence:

 <CustomAction Id='PreInstallAction' BinaryKey='PreInstallBinary' DllEntry='MyCustomAction1' Execute='immediate'
                  Return='check'/>
      <Binary Id='PreInstallBinary' SourceFile='E:\...\MyCustomAction\bin\Release\MyCustomAction.CA.dll'/>

      <InstallExecuteSequence>
         <Custom Action='PreInstallAction' Before='InstallInitialize'/>
      </InstallExecuteSequence>

问题是我的自定义操作被调用了两次 - (在自定义操作中,我将东西打印到日志文件中,我看到它们两次)

我试着评论这条线:

 <MajorUpgrade AllowDowngrades="no" AllowSameVersionUpgrades="yes" DowngradeErrorMessage="Can't downgrade from newer version"  />

它解决了这个问题.但我需要主要更新,所以我尝试取消注释上面的行并为customAction添加一个条件:

<InstallExecuteSequence>
         <Custom Action='PreInstallAction' Before='InstallInitialize'>
            NOT Installed AND NOT PATCH
         </Custom>
      </InstallExecuteSequence>

但现在ny customAction再次被调用两次......我的情况有什么问题吗？我有其他解决方案吗？