blocks|key|1818103|text|我也遇到了同样的问题，但是当我试图用VS2017打开一个在VS2019中创建的项目时，我在我的项目中更改了这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1818104|转到:项目->属性->通用->平台工具集，并更改为您的VS的当前版本。|1818105|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I had the same problem, but when trying to open a project made in VS2019 with VS2017, so I changed this in my project:
Go to: Project-&gt;Properties-&gt;General-&gt;Platform Toolset and change to the current version of your VS.

blocks|key|3928280|text|底线是您需要安装Visual+Studio2019才能访问v142工具。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3928281|随着Visual+Studio的不同版本(VS2015，VS2017，VS2019)，微软还发布了不同的构建工具版本，因为它们不断改进编译器，提供额外的功能，并满足更新的语言标准(C%2B%2B，C%2B%2B11，C%2B%2B17等)。请参阅Visual+Studio+2015+not+detecting+v141+(2017)+Build+tools|offset|length|3928282|另请参阅这篇微软博客文章，内容是关于VS2017的构建工具和从VS2015，Visual+Studio+Build+Tools+now+include+the+VS2017+and+VS2015+MSVC+Toolsets访问旧版v140。|3928283|3928284|你们中的许多人已经告诉我们，你们仍然需要Visual+Studio2015中的v140工具集来继续构建旧的代码库。我们已经更新了Visual+Studio构建工具，以包括Visual+Studio+2015更新3中的v140工具集，包括最新的服务版本。您可能会注意到，编译器工具集内部版本可能与完整VS+2015安装中的版本不匹配，即使它们是相同的编译器。这是因为我们在不同的分支中构建完整的Visual+Studio和Visual+Studio构建工具，这些分支可能是在不同的日期构建的。|blockquote|3928285|3928286|默认情况下，Visual+Studio+build+tools中的Visual+C%2B%2B+Build+Tools工作负载将从VS2017安装最新的v141工具集。VS2015的v140工具集将与v141工具集并行安装。要安装它们，只需选择“Optional”部分底部的“VC%2B%2B+2015.3+v140+toolset+for+desktop+(x86，x64)”即可。|3928287|3928288|在您的例子中，V142构建工具是随VS2019一起发布的。对于VS2017，v142似乎不可用。最新的VS2017构建工具似乎是v141。|3928289|您可以使用Visual+Studio安装程序通过在列表中添加或删除来修改可用的生成工具。这篇文章描述了一个类似的问题，但VS2015+Visual+Studio安装中缺少v140。MSbuild+Error:+The+builds+tools+for+v140+(Platform+Toolset+=+'v140')+cannot+be+found|3928290|但是，如果Microsoft没有为您正在使用的Visual+Studio发布特定的构建工具版本，那么它将不会显示在可用工具集的列表中。|3928291|看起来从VS2015开始，微软正在提供一个标准的Visual+Studio引擎，该引擎在VS+2015，VS2017和VS2019之间共享，构建工具和各种组件正在更新，以提供新的特性和功能以及新的语言标准兼容性。Visual+Studio版本与Visual+Studio版本可以使用的构建工具和组件之间存在依赖关系，例如，VS2017不能使用v142，这很可能是为了激励人们购买较新的产品。|3928292|在安装VS2019之后安装VS2017时的|3928293|顺便说一句，在对这个问题进行一些探索时，我发现了一些文章，这些文章指出，如果您安装了最新的Visual+Studio，然后安装了Visual+Studio的早期版本，则默认的目标构建工具也可以更改为早期安装的构建工具。|style|BOLD|3928294|换句话说，如果您已经安装了默认目标为v142的VS2019，然后安装了VS2017，则默认目标将更改为v141，要求您在使用VS2019时将构建目标实际设置为v142。|3928295|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/44046355/visual-studio-2015-not-detecting-v141-2017-build-tools|1|https://devblogs.microsoft.com/cppblog/visual-studio-build-tools-now-include-the-vs2017-and-vs2015-msvc-toolsets/|2|https://stackoverflow.com/questions/33154696/msbuild-error-the-builds-tools-for-v140-platform-toolset-v140-cannot-be-f^0|0|33|1K|0|0|12|21|1|0|0|0|0|0|0|0|2I|2C|2|0|0|0|0|0|31|0|0|2C|0^^$0|@$1|2|3|4|5|6|7|1H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1I|8|@]|9|@$D|1J|E|1K|1|1L]]|A|$]]|$1|F|3|G|5|6|7|1M|8|@]|9|@$D|1N|E|1O|1|1P]]|A|$]]|$1|H|3|-4|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|1R|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|1S|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1T|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|1U|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1V|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1W|8|@]|9|@$D|1X|E|1Y|1|1Z]]|A|$]]|$1|T|3|U|5|6|7|20|8|@]|9|@]|A|$]]|$1|V|3|W|5|6|7|21|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|22|8|@]|9|@]|A|$]]|$1|Z|3|10|5|6|7|23|8|@$D|24|E|25|11|12]]|9|@]|A|$]]|$1|13|3|14|5|6|7|26|8|@$D|27|E|28|11|12]]|9|@]|A|$]]|$1|15|3|-4|5|6|7|29|8|@]|9|@]|A|$]]]|16|$17|$5|18|19|1A|A|$1B|1C]]|1D|$5|18|19|1A|A|$1B|1E]]|1F|$5|18|19|1A|A|$1B|1G]]]]

The bottom line is that you need to install Visual Studio 2019 to access the v142 tools.
Along with different versions of Visual Studio (VS2015, VS2017, VS2019), Microsoft also releases different build tool versions as they continue to improve the compiler and provide additional capabilities and to meet updated language standards (C++, C++11, C++17, etc.). See <a href="https://stackoverflow.com/questions/44046355/visual-studio-2015-not-detecting-v141-2017-build-tools">Visual Studio 2015 not detecting v141 (2017) Build tools</a>
See as well this Microsoft blog posting about build tools for VS2017 and accessing the older v140 from VS2015, <a href="https://devblogs.microsoft.com/cppblog/visual-studio-build-tools-now-include-the-vs2017-and-vs2015-msvc-toolsets/" rel="noreferrer">Visual Studio Build Tools now include the VS2017 and VS2015 MSVC Toolsets</a>.
<blockquote>
Many of you have told us that you still need the MSVC v140 toolset
from Visual Studio 2015 to continue building older codebases. We’ve
updated the Visual Studio Build Tools to include the v140 toolset from
Visual Studio 2015 Update 3 including the most recent servicing
release. You might notice that the compiler toolset build version may
not match the version in a full VS 2015 install, even though they are
the same compilers. That happens because we build the full Visual
Studio and the Visual Studio Build Tools in separate branches that may
be built on different days.
The Visual C++ build tools workload in the Visual Studio Build Tools
will install the latest v141 toolset from VS2017 by default. The v140
toolset from VS2015 will install side-by-side with the v141 toolset.
To install them just select the “VC++ 2015.3 v140 toolset for desktop
(x86,x64)” at the bottom of the “Optional” section.
</blockquote>
In your case, V142 build tools was released with VS2019. It does not appear that v142 is available for VS2017. The most recent build tools for VS2017 looks to be v141.
You can use the Visual Studio installer to modify the build tools available by adding or removing from the list. This SO posting describes a similar problem but with v140 missing in a VS2015 Visual Studio installation. <a href="https://stackoverflow.com/questions/33154696/msbuild-error-the-builds-tools-for-v140-platform-toolset-v140-cannot-be-f">MSbuild Error: The builds tools for v140 (Platform Toolset = &#39;v140&#39;) cannot be found</a>
However if Microsoft has not released a particular Build Tools version for the Visual Studio you are using then it will not show in the list of available toolsets.
It looks like beginning with VS2015, Microsoft is providing a standard Visual Studio engine that is shared among VS 2015, VS2017, and VS2019 with build tools and various components being updated to provide new features and functionality and new language standards compliance. There are dependencies between the Visual Studio version and what build tools and components can be used with the Visual Studio version, e.g. v142 is not available for VS2017, most probably to provide an incentive for purchasing the newer product.
On installing VS2017 after installing VS2019
As a side note, while doing a bit of discovery on this question, I have found some articles that indicate that if you have a recent Visual Studio installed and then install an earlier version of Visual Studio, the default target build tools can also change to the build tools for the earlier install.
In other words, if you have VS2019 with a default target of v142 already installed and then install VS2017, the default target will change to v141 requiring you to actually set the build target to v142 when using VS2019.

blocks|key|5345941|text|我也有同样的问题，但我想保留Visual+Studio+2017、Visual+Studio+2019和Visual+Studio+2022对构建相同项目的支持。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5345942|我所做的是编辑我的.vcxproj，它是一个MSBuild格式的文件，如下所示：|offset|length|style|CODE|5345943|之前(工具集1.42，仅在Visual+Studio+2019中可用，在Visual+Studio+2017和2022中失败)：|5345944|...
++<PropertyGroup+Condition="'$(Configuration)%7C$(Platform)'=='Debug%7CWin32'"+Label="Configuration">
++++...
++++<PlatformToolset>v142</PlatformToolset>
++++...
++</PropertyGroup>
...|code-block|syntax|javascript|5345945|之后，每个Visual+Studio版本都使用自己的工具集版本：|5345946|...
++<PropertyGroup+Condition="'$(Configuration)%7C$(Platform)'=='Debug%7CWin32'"+Label="Configuration">
++++...
++++<PlatformToolset+Condition="'$(VisualStudioVersion)'+==+'15.0'">v141</PlatformToolset>
++++<PlatformToolset+Condition="'$(VisualStudioVersion)'+==+'16.0'">v142</PlatformToolset>
++++<PlatformToolset+Condition="'$(VisualStudioVersion)'+==+'17.0'">v143</PlatformToolset>
++++...
++</PropertyGroup>
...|5345947|entityMap^0|0|9|8|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@$D|W|E|X|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|Z|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|R|5|L|7|11|8|@]|9|@]|A|$M|N]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

I had the same problem but I wanted to keep both Visual Studio 2017, Visual Studio 2019 and Visual Studio 2022 support for building the same project.
What I did is edited my <code>.vcxproj</code>, which is an MSBuild-format file, like this:
Before (toolset 1.42, only available with Visual Studio 2019, fails with Visual Studio 2017 and 2022):
<pre><code>...
 &lt;PropertyGroup Condition=&quot;'$(Configuration)|$(Platform)'=='Debug|Win32'&quot; Label=&quot;Configuration&quot;&gt;
 ...
 &lt;PlatformToolset&gt;v142&lt;/PlatformToolset&gt;
 ...
 &lt;/PropertyGroup&gt;
...
</code></pre>
After, each Visual Studio Version uses its own toolset version:
<pre><code>...
 &lt;PropertyGroup Condition=&quot;'$(Configuration)|$(Platform)'=='Debug|Win32'&quot; Label=&quot;Configuration&quot;&gt;
 ...
 &lt;PlatformToolset Condition=&quot;'$(VisualStudioVersion)' == '15.0'&quot;&gt;v141&lt;/PlatformToolset&gt;
 &lt;PlatformToolset Condition=&quot;'$(VisualStudioVersion)' == '16.0'&quot;&gt;v142&lt;/PlatformToolset&gt;
 &lt;PlatformToolset Condition=&quot;'$(VisualStudioVersion)' == '17.0'&quot;&gt;v143&lt;/PlatformToolset&gt;
 ...
 &lt;/PropertyGroup&gt;
...
</code></pre>

blocks|key|1818250|text|我在两台不同的计算机上同时使用Visual+studio+2017和visual+studio+2019，并且经常遇到平台工具集的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1818251|在VS+2019上，当打开使用VS2017创建的解决方案/项目时，我通常只需转到顶部菜单栏中的“项目”，然后选择“重定目标解决方案”(这可能会将平台设置为V142)。|1818252|相反，在VS+2017上，当打开使用VS2019+(platform+toolset+v142)创建的解决方案/项目时，为了让它能够工作，我需要将其“降级”到platform+v141。为此，我在项目(而不是解决方案)上右循环，选择属性，然后选择“常规”并查找我设置为"Visual+studio+2017+(v141)“的”平台工具集“，然后我可以再次编译，而不会出现错误。|1818253|​|1818254|📷|atomic|offset|length|1818255|1818256|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/ea0ef214fe9c64be4df47f284a51f5f2.png|imageAlt^0|0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|Z|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|10|8|@]|9|@$K|11|L|12|1|13]]|A|$]]|$1|M|3|G|5|6|7|14|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|U|V|-4]]]]

I'm using both Visual studio 2017 and visual studio 2019 on two different computers and regularly have problems with the platform toolset.
On VS 2019, when opening a solution/project created with VS2017, i usually simply go to &quot;projects&quot; in the menu bar on the top and choose &quot;retarget solution&quot; (this probably sets the platform to V142).
on the contrary, on VS 2017, when opening the solution/project created with VS2019 (platform toolset v142),to allow it to work, I need to &quot;downgrade&quot; it to the platform v141. To do that, I right clic on the project (not the solution) and choose properties, then &quot;general&quot; and look for &quot;platform toolset&quot; that i set to &quot;Visual studio 2017 (v141)&quot; and then i can compile again without errors.
<a href="https://i.stack.imgur.com/OdUE1.png" rel="noreferrer"><img src="https://i.stack.imgur.com/OdUE1.png" alt="the property panel to set the correct platform toolset" /></a>

blocks|key|1818274|text|这对我很有效:进入ProjectName.vcxproj文件，删除v142构建脚本，并替换为与您正在使用的Microsoft+Visual+Studio版本相对应的构建脚本，或者如果它是升级的MVSC，则删除该脚本并重新定位您的项目。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1818275|entityMap^0|9|J|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

This worked for me: Go into the <code>ProjectName.vcxproj</code> file and remove the v142 build script and replace with the build script that corresponds to the Microsoft Visual Studio version you are using or remove the script and Retarget your project if it is an upgraded MVSC.

blocks|key|1818307|text|在安装了VS2019的最新升级版本后，我遇到了与原始帖子完全相同的问题，即error+MSB8020+re:+building+apps+in+VS2017。我使用了本系列中最简单的没有构建的应用程序(都有上面的错误)，并使用了“重定目标解决方案”，选择了Windows+SDK版本10.0.17763.0。在那之后，我做了一个重建，应用程序构建得很好。我检查了解决方案中每个项目的属性，Windows+SDK版本如您所料已更改为10.0.17763.0。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1818308|然后，当我打开其他VS2017应用程序时，它们也都构建得很好，没有做任何更改(这些应用程序之前都失败了)。然而，他们的项目属性仍然引用SDK版本10.0.14393.0，该版本可能是VS2019版本。所有的应用程序现在都“神奇”地将它们的工具集显示为Visual+Studio2017+(v141)。HTH，即使不能解释它为什么工作。|1818309|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

After installing the latest upgrade of VS2019, I had exactly the same problem as the original poster i.e. error MSB8020 re: building apps in VS2017. I used the simplest app in the series that were not building (all with the error above), and used 'Retarget solution', selecting Windows SDK version 10.0.17763.0. After that I did a rebuild and the app built fine. I checked the properties for each project in the solution, and the Windows SDK version had changed to 10.0.17763.0 as you would expect.
When I then opened other VS2017 apps, they all built fine too without making any changes (these apps all failed before). However, their project properties still refer an SDK version 10.0.14393.0 which presumably is the VS2019 one. All the apps now 'magically' show their toolset as Visual Studio 2017 (v141). HTH, even if not explaining why it works.

blocks|key|1526864|text|打开Visual+Studio，我正在使用(版本17.1.0)。下载所需的文件并进行安装。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1526865|​|1526866|📷|atomic|offset|length|1526867|1526868|1526869|1526870|1526871|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/a59e4909f853783a4da4a4575882998e.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/ba44e33ce408c90cafc2670588c210f3.png^0|0|0|0|1|0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Z|8|@]|9|@$G|10|H|11|1|12]]|A|$]]|$1|I|3|C|5|6|7|13|8|@]|9|@]|A|$]]|$1|J|3|C|5|6|7|14|8|@]|9|@]|A|$]]|$1|K|3|E|5|F|7|15|8|@]|9|@$G|16|H|17|1|18]]|A|$]]|$1|L|3|C|5|6|7|19|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T|U|-4]]|V|$5|P|Q|R|A|$S|W|U|-4]]]]

Open Visual Studio, I'm using (Version 17.1.0).
Download the required file and install it.
<a href="https://i.stack.imgur.com/0xXu8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0xXu8.png" alt="Go to Tools&gt;Get tools and features" /></a>
<a href="https://i.stack.imgur.com/zhx8B.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/zhx8B.png" alt="Go to Installation details&gt;Desktop Development with c++ (for windows)" /></a>

As I am trying to build something in visual studio then visual studio show me some warning and then If i ignored it and build then error occurs.

<pre><code> error MSB8020: The build tools for v142 (Platform Toolset = 'v142') 
 cannot be found. To build using the v142 build tools, please install 
 v142 build tools.
</code></pre>

It will also show me an Alternate option I also tried it but not works.

<pre><code> Alternatively, you may upgrade to the current 
 Visual Studio tools by selecting the Project menu or right-click the 
 solution, and then selecting "Retarget solution".
</code></pre>

How to install (v142) Build tools in Visual studio

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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当我试图在visual studio中构建一些东西时，visual studio会显示一些警告，然后如果我忽略了它并进行构建，那么就会发生错误。    error MSB8020: The build tools for v142 (Platform Toolset = 'v142')     cannot be fo...

问如何在Visual studio中安装(v142)生成工具
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问如何在Visual studio中安装(v142)生成工具EN