Ubuntu 22.04.3下Rider 2023搭配dotnet-8.0无法运行项目求助

之前安装了.NET SDK 7.0，所有功能运行正常。昨日通过命令sudo apt remove 'dotnet*' 'aspnet*' 'netstandard*'卸载了系统中现有.NET包，再从微软软件仓库安装了.NET SDK 8.0，现在Rider无法运行项目。

系统信息 #

Ubuntu 22.04.3 LTS

dotnet --info输出 #

.NET SDK:
 Version:           8.0.100
 Commit:            57efcf1350
 Workload version:  8.0.100-manifests.6c33ef20

Runtime Environment:
 OS Name:     ubuntu
 OS Version:  22.04
 OS Platform: Linux
 RID:         linux-x64
 Base Path:   /usr/share/dotnet/sdk/8.0.100/

.NET workloads installed:
 Workload version: 8.0.100-manifests.6c33ef20
There are no installed workloads to display.

Host:
  Version:      8.0.0
  Architecture: x64
  Commit:       5535e31a71

.NET SDKs installed:
  8.0.100 [/usr/share/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 8.0.0 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 8.0.0 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
  None

Environment variables:
  Not set

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download

工具集与构建配置 #

Rider错误信息 #

/.../Project/src/Xxx.GraphQl/bin/Debug/net8.0/DataGateway.GraphQl
You must install .NET to run this application.

App: /.../Project/src/Xxx.GraphQl/bin/Debug/net8.0/DataGateway.GraphQl
Architecture: x64
App host version: 8.0.0
.NET location: Not found

Learn more:
https://aka.ms/dotnet/app-launch-failed

Download the .NET runtime:
https://aka.ms/dotnet-core-applaunch?missing_runtime=true&arch=x64&rid=linux-x64&os=ubuntu.22.04&apphost_version=8.0.0

Process finished with exit code 131.

解决思路 #

• 检查Rider的.NET SDK配置：打开Rider设置（File > Settings），进入Build, Execution, Deployment > Toolset and Build，确认已选中已安装的.NET 8.0 SDK；同时右键项目选择Properties > Application，确认目标框架设置为net8.0。
• 验证命令行运行：在项目根目录执行dotnet run --project src/Xxx.GraphQl，若命令行可正常运行，说明问题出在Rider配置；若同样报错，继续排查安装问题。
• 配置环境变量：检查DOTNET_ROOT是否指向/usr/share/dotnet，终端执行echo $DOTNET_ROOT查看。若未设置，将export DOTNET_ROOT=/usr/share/dotnet添加到~/.bashrc或~/.zshrc，然后执行source ~/.bashrc（或对应配置文件）生效。
• 重新安装.NET SDK：执行sudo apt-get install --reinstall dotnet-sdk-8.0，确保SDK组件完整。
• 清理项目缓存：删除项目的bin和obj目录，在Rider中执行Clean Solution后再Rebuild Solution。
• 升级Rider版本：确保Rider版本为2023.2及以上（该版本开始支持.NET 8），若版本过低，升级Rider。

内容的提问来源于stack exchange，提问作者Andriy