如何添加项目转换VS2012 . projmsbuild文件

Question

基于描述将图像文件从jpg转换为png的项转换的答案，我进行了将。docx文件转换为。pdf的项转换。当我从项目名中调用它时。我得到这个错误信息:

Error   1   The condition " '%(Extension)' == '.docx' " on the
"WordToPdf" target has a reference to item metadata. References to item 
metadata are not allowed in target conditions unless they are part of an item
transform. [project path].buildWordToPdf.Tasks.target 7   9

我怎样才能使它工作?

这是我的目标:

    <?xml version="1.0" encoding="utf-8" ?>
    <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
      <!-- $Id$ -->
      <Target Name="WordToPdf"
            Inputs="@(Content)"
            Outputs="@(Content -> '%(RootDir)%(Directory)%(Filename).pdf' )"
            Condition=" '%(Extension)' == '.docx' ">
        <ItemGroup>
          <Sublist Include="@(Content)" Condition=" '%(Extension)' == '.docx' " />
        </ItemGroup>
        <PropertyGroup>
          <PowerShellExe Condition=" '$(PowerShellExe)'=='' ">%WINDIR%System32WindowsPowerShellv1.0powershell.exe</PowerShellExe>
          <ScriptLocation Condition=" '$(ScriptLocation)'=='' ">.WordToPdf.ps1</ScriptLocation>
        </PropertyGroup>
        <Exec Command="$(PowerShellExe) -NonInteractive -executionpolicy Unrestricted -command &quot;&amp; {&amp;&apos;$(ScriptLocation)&apos; -WordFilename &apos;/Input:%(Sublist.FullPath)&apos; }&quot;" />
        <Content Remove="@(Sublist)" />
        <Content Include="@(Sublist -> '%(RootDir)%(Directory)%(Filename).pdf' )" />
      </Target>
    </Project>

从我的projectname调用它。项目文件从BeforeBuild目标，如下所示:

  <Import Project="$(MSBuildTasksPath)WordToPdf.Tasks.target" />
  ....
  <Target Name="BeforeBuild">
    <CallTarget Targets="WordToPdf" />
  </Target>

除了让转换工作之外，这个目标还有更多的错误。为了将来参考，下面是最终的工作代码:

<?xml version="1.0" encoding="utf-8" ?>
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <!-- $Id$ -->
  <Target Name="WordToPdf"
      Inputs="@(ContentFiltered)"
      Outputs="@(ContentFiltered -> '%(RootDir)%(Directory)%(Filename).pdf' )"
      DependsOnTargets="FilterContent">
    <PropertyGroup>
      <PowerShellExe Condition=" '$(PowerShellExe)'=='' ">%WINDIR%System32WindowsPowerShellv1.0powershell.exe</PowerShellExe>
      <ScriptLocation Condition=" '$(ScriptLocation)'=='' ">.WordToPdf.ps1</ScriptLocation>
    </PropertyGroup>
    <Exec Command="$(PowerShellExe) -NonInteractive -executionpolicy Unrestricted -command &quot;&amp; {&amp;&apos;$(ScriptLocation)&apos; -WordFilename &apos;%(ContentFiltered.FullPath)&apos; }&quot;" />
    <ItemGroup>
      <Content Remove="@(ContentFiltered)" />
      <Content Include="@(ContentFiltered -> '%(RootDir)%(Directory)%(Filename).pdf' )" />
    </ItemGroup>
  </Target>
  <!-- New target to pre-filter list -->
  <Target Name="FilterContent">
    <ItemGroup>
      <ContentFiltered Include="@(Content)" Condition="'%(Extension)' == '.docx'" />
    </ItemGroup>
  </Target>
</Project>

并且，对于任何在这里搜索"msbuild word to pdf item transform"的人下面是powershell脚本:

Param(
  [string]$WordFilename
)
$Word = New-Object -comobject Word.Application
$Doc=$Word.Documents.Open($WordFilename)
$Doc.saveas([ref](($WordFilename).replace("docx","pdf")), [ref]17)
$Doc.close()

将。docx文件添加到您的项目中，作为内容-复制较新的文件，如果docx文件较新，则将创建pdf文件，然后将pdf文件复制到其输出位置

Answer 1

您可以通过创建单独的目标来解决这个问题，该目标根据您的条件预过滤项目-实际上是创建新列表。

下面是示例-注意新的DependsOnTargets标签和更改的ContentFiltered名称:

  <Target Name="WordToPdf"
        Inputs="@(ContentFiltered)"
        Outputs="@(ContentFiltered -> '%(RootDir)%(Directory)%(Filename).pdf' )"
        DependsOnTargets="FilterContent">
    <!-- 
      ...
      your actual target body here 
      ...
      -->
  </Target>
  <!-- New target to pre-filter list -->
  <Target Name="FilterContent">
    <ItemGroup>
      <ContentFiltered Include="@(Content)" Condition="'%(Extension)' == '.docx'" />
    </ItemGroup>
  </Target>