能否将Visual Studio 2017社区版工作负载迁移至专业版？

Great question! Let's break down how you can reuse your existing Visual Studio 2017 Community components in the Professional edition while minimizing data usage, especially since you're on limited mobile data.

First, a core fact: Visual Studio 2017 Community and Professional editions share the same component cache architecture. The default cache folder C:\ProgramData\Microsoft\VisualStudio\Packages stores all downloaded components for any VS2017 edition. The catch is your Community version is v15.0, while Professional is v15.7.1—so some component versions may not match directly. But we can work around this to avoid full downloads.

Option 1: Upgrade Community to v15.7.1 first, then switch to Professional (Best for Minimal Data) #

If you haven't uninstalled your Community edition yet, this is the most efficient approach:

• Keep your cache intact: Don't delete the C:\ProgramData\Microsoft\VisualStudio\Packages folder—it's your goldmine of already downloaded components.
• Upgrade Community to v15.7.1 offline:
  Grab the VS2017 Community installer for v15.7.1 (you can download this via mobile browser from Microsoft's archived VS versions page). Run the installer with the --noWeb flag to force it to use your local cache:

  vs_community.exe --noWeb --installPath "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community"
  

  The installer will only download the minimal files needed to update your existing v15.0 components to v15.7.1, instead of re-downloading everything.
• Switch to Professional Edition:
  Once upgraded, open VS2017 Community, go to Tools > Get Tools and Features. Click the Account tab, enter your Professional edition product key. The IDE will instantly convert to Professional mode—no downloads required, and all your existing workloads (VSTO, .NET Desktop, etc.) will remain intact.

Option 2: Install Professional v15.7.1 using existing Community cache (If Community is already uninstalled) #

If you've already removed Community edition but kept the cache folder:

• Get the Professional v15.7.1 installer: Download the matching version installer via mobile (look for archived VS2017 releases).
• Run the installer with offline mode:
  Use the --noWeb flag to prioritize local cache files:

  vs_professional.exe --noWeb --installPath "C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional"
  

• Select workloads carefully:
  In the installation interface, check the workloads you need (VSTO, .NET Desktop, etc.). The installer will use cached components where possible. If some components are missing (due to v15.0 vs v15.7.1 version differences), it will throw an error. For missing components, you can uncheck them temporarily to complete the base installation, then add them later when you have stable internet.

Key Notes #

• Never delete the cache folder: C:\ProgramData\Microsoft\VisualStudio\Packages is shared across all VS2017 editions—guard it closely to avoid re-downloads.
• Match installer versions: Always use the installer for the exact version you want (v15.7.1) to ensure compatibility with cached components.
• --noWeb is critical: This flag prevents the installer from trying to download files, saving your mobile data.

内容的提问来源于stack exchange，提问作者badDevH