msbuild中的双循环？

我正在为msbuild编写一个脚本，该脚本应在一个步骤中生成两个批处理。
示例：2个项目组

<ItemGroup>
 <GroupOne Include="1" />
 <GroupOne Include="2" />
</ItemGroup>

<ItemGroup>
 <GroupTwo Include="A" />
 <GroupTwo Include="B" />
</ItemGroup>

结果。
但那没有发生。相反，它返回了以下无用的垃圾：

1  
2  
  A  
  B  

按照下面链接中的博客建议的方式（使用本地propertygroup）进行操作，如

有什么提示吗？我快发疯了-(

PS：这里有一篇关于这个主题的博客文章——不幸的是，它没有像上面所说的那样起作用：

---

尝试使用组1中的标识创建新项目组，并从组2的标识（或任何其他元数据）将元数据分配给新项目组。然后使用批处理在新组上迭代

<CreateItem Include="@(GroupOne)" AdditionalMetadata="Option1=%(GroupTwo.Identity)">
    <Output ItemName="_Group_Merged" TaskParameter="Include"/>
</CreateItem>

<Message Text="%(_Group_Merged.Identity)-%(_Group_Merged.Option1)" />

如果您有两个以上的组，则可以添加CreateItem条目以将第三个组合并到_group_Merged中，然后迭代该组合组

<CreateItem Include="@(_Group_Merged)" AdditionalMetadata="Option2=%(GroupThree.Identity)">
    <Output ItemName="_Group_Merged2" TaskParameter="Include"/>
</CreateItem>

<Message Text="%(_Group_Merged2.Identity)-%(_Group_Merged2.Option1)-%(_Group_Merged2.Option2)" />

---

这是一个简单得多的解决方案

<Target Name="Default">
    <ItemGroup>
        <Combined Include="@(GroupOne)">
            <GroupTwo>%(GroupTwo.Identity)</GroupTwo>
        </Combined>
    </ItemGroup>

    <Message Text="%(Combined.Identity) %(Combined.GroupTwo) " />
</Target>

---

还可以使用的技术制作三重嵌套循环

%（2.身份）
%（3.身份）

对于两个嵌套循环，此操作有效：

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

    <ItemGroup>
        <GroupOne Include="1" />
        <GroupOne Include="2" />
    </ItemGroup>

    <ItemGroup>
        <GroupTwo Include="A" />
        <GroupTwo Include="B" />
    </ItemGroup>

    <Target Name="Exec"
        Outputs="%(GroupOne.Identity)">
        <Message Text="Building @(GroupOne->'%(Identity)') %(GroupTwo.Identity)"/>
    </Target>  

</Project>

---

谢谢你的回答。终于成功了。在我的例子中，“组合”项目组不在任何目标内（在所有其他项目组定义之后）在这种情况下，结果只是第一个ItemGroup内容。有人知道这是为什么吗？@DogEars如何根据Name=One和GroupOne.Identity=GroupTwo.Identity筛选GroupOne以避免交叉乘积？

<CreateItem Include="@(GroupOne)" AdditionalMetadata="Option1=%(GroupTwo.Identity)">
    <Output ItemName="_Group_Merged" TaskParameter="Include"/>
</CreateItem>

<Message Text="%(_Group_Merged.Identity)-%(_Group_Merged.Option1)" />

<CreateItem Include="@(_Group_Merged)" AdditionalMetadata="Option2=%(GroupThree.Identity)">
    <Output ItemName="_Group_Merged2" TaskParameter="Include"/>
</CreateItem>

<Message Text="%(_Group_Merged2.Identity)-%(_Group_Merged2.Option1)-%(_Group_Merged2.Option2)" />

<Target Name="Default">
    <ItemGroup>
        <Combined Include="@(GroupOne)">
            <GroupTwo>%(GroupTwo.Identity)</GroupTwo>
        </Combined>
    </ItemGroup>

    <Message Text="%(Combined.Identity) %(Combined.GroupTwo) " />
</Target>

<ItemGroup>
    <GroupOne Include="1">
        <Name>One</Name>
    </GroupOne>
    <GroupOne Include="2">
        <Name>Two</Name>
    </GroupOne>
</ItemGroup>

<ItemGroup>
    <GroupTwo Include="A">
        <Name>Andrew</Name>
    </GroupTwo>
    <GroupTwo Include="B">
        <Name>Bob</Name>
    </GroupTwo>
</ItemGroup>

<Target Name="Default">
    <ItemGroup>
        <Combined Include="@(GroupOne)">
            <GroupTwo>%(GroupTwo.Identity)</GroupTwo>
            <GroupTwoName>%(GroupTwo.Name)</GroupTwoName>
        </Combined>
    </ItemGroup>

    <Message Text="%(Combined.Identity) %(Combined.Name) %(Combined.GroupTwoName) %(Combined.GroupTwo) " />
</Target>

  <Target Name="Test">
    <ItemGroup>
      <Loop1 Include="L11" />
      <Loop1 Include="L12" />
      <Loop2 Include="L21" />
      <Loop2 Include="L22" />
      <Loop3 Include="L31" />
      <Loop3 Include="L32" />
      <Loop12 Include="@(Loop1)">
        <!-- Combine Loop1 and Loop2: Inherit each meta data of Loop1 and add some of Loop2. -->
        <Loop2Identity>%(Loop2.Identity)</Loop2Identity>
      </Loop12>
      <Loop123 Include="@(Loop12)">
        <!-- Combine Loop12 and Loop3: Inherit each meta data of Loop12 and add some of Loop3. -->
        <Loop3Identity>%(Loop3.Identity)</Loop3Identity>
      </Loop123>
    </ItemGroup>
    <!-- Show all entries of Loop1 and Loop2 combined -->
    <Message Text="Loop12.Identity=%(Loop12.Identity), Loop12.Value1=%(Loop12.Value1), Loop12.Loop2Identity=%(Loop12.Loop2Identity)"/>
    <!-- Show all entries of Loop1, Loop2 and Loop3 combined -->
    <Message Text="Loop123.Identity=%(Loop123.Identity), Loop123.Loop2Identity=%(Loop123.Loop2Identity) Loop123.Loop2Identity=%(Loop123.Loop3Identity)"/>
  </Target>

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

    <ItemGroup>
        <GroupOne Include="1" />
        <GroupOne Include="2" />
    </ItemGroup>

    <ItemGroup>
        <GroupTwo Include="A" />
        <GroupTwo Include="B" />
    </ItemGroup>

    <Target Name="Exec"
        Outputs="%(GroupOne.Identity)">
        <Message Text="Building @(GroupOne->'%(Identity)') %(GroupTwo.Identity)"/>
    </Target>  

</Project>

Project "D:\tmp\msbuildtest\test.xml" on node 0 (default targets).
  Building 1 A
  Building 1 B
Exec:
  Building 2 A
  Building 2 B
Done Building Project "D:\tmp\msbuildtest\test.xml" (default targets).