未找到框架“Microsoft.AspNetCore.App"，版本“3.1.3" [英] The framework 'Microsoft.AspNetCore.App', version '3.1.3' was not found

问题描述

在另一台开发人员机器上将我的网络应用程序的 targetFramework 从 dotnet-core-2.2 升级到 dotnet-core-3.1.2 后，我们收到以下错误

After upgrading targetFramework for my web app from dotnet-core-2.2 to dotnet-core-3.1.2 on another developer machine we are getting following error

It was not possible to find any compatible framework version
The framework 'Microsoft.AspNetCore.App', version '3.1.3' was not found.
  - No frameworks were found.

You can resolve the problem by installing the specified framework and/or SDK.

The specified framework can be found at:
  - https://aka.ms/dotnet-core-applaunch?framework=Microsoft.AspNetCore.App&framework_version=3.1.3&arch=x64&rid=win10-x64

我们尝试了几种方法来解决这个问题

We have tried several approaches to solve the issue

• 从指定链接下载并安装 dotnet 内核出错
• 从链接下载运行时 https://dotnet.microsoft.com/download/dotnet-core/3.1
• 卸载了 3.1.2 或 3.1.3 以外的其他 dotnet 核心框架版本

我们仍然面临同样的问题，请指导我解决此问题.

still we are facing the same issue, please guide me to troubleshoot this issue.

推荐答案

我在 上发布了同样的问题github dotnet 问题页面，用户 vitek karas 向我提供了 x64 运行时 C:ProgramFilesdotnetsharedMicrosoft.AspNetCore.App3.1.3 文件夹丢失的线索.

I have posted same question on github dotnet issues page, the user vitek karas provided me the lead that x64 runtime C:ProgramFilesdotnetsharedMicrosoft.AspNetCore.App3.1.3 folder was missing.

然后我尝试重新安装 SDK 3.1.201 仍然缺少文件夹.

Then I tried reinstalling SDK 3.1.201 still folder was missing.

我也试过安装 aspnetcore-runtime-3.1.3 X64 仍然缺少文件夹.

I also tried install aspnetcore-runtime-3.1.3 X64 still folder was missing.

最后我下载了 dotnet-sdk-3.1.201-win-x64.zip 并从 zip 手动复制 Microsoft.AspNetCore.App3.1.3 文件夹文件到 C:ProgramFilesdotnetsharedMicrosoft.AspNetCore.App3.1.3 然后我的 asp.net 核心应用程序开始工作.

finally I have downloaded dotnet-sdk-3.1.201-win-x64.zip and copied Microsoft.AspNetCore.App3.1.3 folder manually from the zip file to C:ProgramFilesdotnetsharedMicrosoft.AspNetCore.App3.1.3 then my asp.net core application started working .

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