.NET Core类库的条件编译符号 [英] Conditional compilation symbol for a .NET Core class library

问题描述

我已经创建了一个.NET Core R2类库，并且具有一些用于多个不同平台的通用代码。

其中一些代码无效.NET Core平台，因此我希望将其包装在条件编译符号中。首先，我在互联网上搜索了是否可以找到内置符号（例如SILVERLIGHT表示

请注意，我在 NET_CORE 值中添加了有条件的编译符号，但是当我在代码中使用它时，代码不会被忽略。

1. 是否有内置的NET Core平台（我正在使用R2）的符号？




2. 如果没有，我创建自己的符号会出错吗？ p>

.xproj文件：

 <？xml version = 1.0 encoding = utf-8？> 
< Project ToolsVersion = 14.0 DefaultTargets = Build xmlns = http://schemas.microsoft.com/developer/msbuild/2003> 
< PropertyGroup> 
< VisualStudioVersion Condition ='$（VisualStudioVersion）'==‘’> 14.0< / VisualStudioVersion> 
< VSToolsPath Condition ='$（VSToolsPath）'==‘’> $（MSBuildExtensionsPath32）\Microsoft\VisualStudio\v $（VisualStudioVersion）< / VSToolsPath> 
< / PropertyGroup> 
<导入项目= $（VSToolsPath）\DotNet\Microsoft.DotNet.Props Condition ='$（VSToolsPath）'！=’ /> 
< PropertyGroup Label = Globals> 
< ProjectGuid> 253184d7-9b42-4233-a871-8cfa3ee9e83e< / ProjectGuid> 
< RootNamespace> Linq2Db.NetCore< / RootNamespace> 
< BaseIntermediateOutputPath Condition =’$（BaseIntermediateOutputPath）’==’’> .\obj< / BaseIntermediateOutputPath> 
< OutputPath Condition =’$（OutputPath）’==’> .\bin\< / OutputPath> 
< TargetFrameworkVersion> v4.6.1< / TargetFrameworkVersion> 
< SccProjectName> SAK< / SccProjectName> 
< SccProvider> SAK< / SccProvider> 
< SccAuxPath> SAK< / SccAuxPath> 
< SccLocalPath> SAK< / SccLocalPath> 
< / PropertyGroup> 
< PropertyGroup> 
< SchemaVersion> 2.0< / SchemaVersion> 
< / PropertyGroup> 
<导入项目= $（VSToolsPath）\DotNet\Microsoft.DotNet.targets Condition ='$（VSToolsPath）'！=’ /> 
< / Project> 
  

---

更新：我能够使用提供的答案中的链接解决此问题。这里是详细信息...

最初 project.json 文件看起来像这样...

  {
 dependencies：{
 NETStandard.Library： 1.5.0-rc2-24027 
}，
 frameworks：{
 netstandard1.5：{
 imports： dnxcore50 
} 
}，
 buildOptions：{
 defines：[ NET_CORE] 
} 
} 
  

我通过将其更改为以下内容来解决了这个问题...

  {
  frameworks：{
 netstandard1.5：{
 imports： dnxcore50，
 dependencies：{
 NETStandard.Library： 1.5。 0-rc2-24027 
}，
 buildOptions：{
 define：[ NET_CORE] 
} 
} 
} 
} 
  

解决方案

应在您的应用中定义条件变量RC2的project.json文件，我在这里有一个示例项目，

.NET中的端口#SNMP RC1到RC2的核心

但是本文中还有一些预定义的

使用跨平台工具开发图书馆

I have created a .NET Core R2 class library and have some common code that I use for several different platforms.

Some of the code is not valid in the .NET Core platform and so I wish to wrap it around a conditional compilation symbol. I first searched the Internet to see if I could find a built-in symbol (like SILVERLIGHT for Silverlight applications and WINFX_CORE for Windows 8 applications), but I was not able to find any information, so I decided to create my own symbol. This also does not seem to work.

From everything I read, adding and using a symbol should be easy. Just add a value to the conditional compilation symbols in the project properties → Build tab. I did that, but it does not seem to work. Here are a couple of screenshots...

Notice that I added a NET_CORE value in the conditional compilation symbol, but when I use it in code the code is not being ignored.

1. Is there is a built-in symbol for the .NET Core platform (I am using R2)?

2. If there is not one, what am I doing wrong creating my own symbol?

The .xproj file:

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0</VisualStudioVersion>
    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
  </PropertyGroup>
  <Import Project="$(VSToolsPath)\DotNet\Microsoft.DotNet.Props" Condition="'$(VSToolsPath)' != ''" />
  <PropertyGroup Label="Globals">
    <ProjectGuid>253184d7-9b42-4233-a871-8cfa3ee9e83e</ProjectGuid>
    <RootNamespace>Linq2Db.NetCore</RootNamespace>
    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">.\obj</BaseIntermediateOutputPath>
    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
    <SccProjectName>SAK</SccProjectName>
    <SccProvider>SAK</SccProvider>
    <SccAuxPath>SAK</SccAuxPath>
    <SccLocalPath>SAK</SccLocalPath>
  </PropertyGroup>
  <PropertyGroup>
    <SchemaVersion>2.0</SchemaVersion>
  </PropertyGroup>
  <Import Project="$(VSToolsPath)\DotNet\Microsoft.DotNet.targets" Condition="'$(VSToolsPath)' != ''" />
</Project>

---

UPDATE: I was able to resolve this using the link in the provided answer. Here are the details...

Originally the project.json file looked like this...

{
  "dependencies": {
        "NETStandard.Library": "1.5.0-rc2-24027"
  },
  "frameworks": {
    "netstandard1.5": {
      "imports": "dnxcore50"
    }
  },
  "buildOptions": {
    "defines": [ "NET_CORE" ]
  }
}

I resolved the issue by changing it to this...

{
  "frameworks": {
    "netstandard1.5": {
      "imports": "dnxcore50",
      "dependencies": {
        "NETStandard.Library": "1.5.0-rc2-24027"
      },
      "buildOptions": {
        "define": [ "NET_CORE" ]
      }
    }
  }
}

解决方案

Conditional variables should be defined in your project.json file for RC2, and I have a sample project here,

Port #SNMP from .NET Core RC1 to RC2

But there are also predefined ones from this article,

Developing Libraries with Cross Platform Tools

这篇关于.NET Core类库的条件编译符号的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！