将文件添加到Wix安装程序(如果存在) [英] Add file to Wix installer if it exists

问题描述

我正在这样尝试在我的主要wxs文件中向安装程序添加文件.

I am trying to add a file to the installer like this in my main wxs file.

    <ComponentGroup Id="Files" Directory="Bin">
        <?if $(var.FILE_EXISTS) = "true"?>
            <Component>
                <Condition>$(var.FILE_EXISTS) = "true"</Condition>
                <File Source="$(var.SourceDir)/file.txt"/>
            </Component>
    </ComponentGroup>

我正在通过带有-d选项的Candle.exe传递FILE_EXISTS

I'm passing FILE_EXISTS through candle.exe with the -d option

但是它没有生效.它没有被添加.当我没有条件(仅File元素)时，它可以工作.有什么想法吗?

But its not taking effect. Its not getting added. It works when I don't have the conditions (just the File element). Any ideas?

推荐答案

据我了解，您所讨论的条件是构建时条件.基本上，您希望控制相关文件是否进入MSI包中.

As far as I understand, the condition you are talking about is a build-time condition. Basically, you would like to control whether the file in question gets into the MSI package.

如果正确，则一个错误是< Component> 下的< Condition> 元素.这是安装时的条件，只会影响安装文件的时间.

If that's correct, then one mistake is the <Condition> element under <Component>. That's install-time condition, and only influences then the file is installed.

另一个是纯语法问题.<?if?> 指令必须具有结束元素.

The other one is a pure syntax issue. The <?if?> directive must have the closing element.

考虑到上述情况，您的代码段可能看起来像这样:

Taking the above into account, your snippet might look like this:

<ComponentGroup Id="Files" Directory="Bin">
  <?if $(var.FILE_EXISTS) = "true"?>
  <Component>
    <File Source="$(var.SourceDir)/file.txt"/>
  </Component>
  <?endif?>
</ComponentGroup>

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