[英]Hello World dotnet core example not working
我正在运行 Visual Studio 并尝试了 dotnet 核心的 Hello World 控制台示例。
PS d:\test> dotnet nuget list source
Registered Sources:
1. Microsoft Visual Studio Offline Packages [Enabled]
C:\Program Files (x86)\Microsoft SDKs\NuGetPackages\
3. Package source 1 [Enabled]
C:\Program Files\dotnet\packs
4. Package source 2 [Enabled]
C:\Program Files\dotnet\sdk\NuGetFallbackFolder
PS d:\test> dotnet --info
.NET Core SDK (reflecting any global.json):
Version: 3.1.300
Commit: b2475c1295
Runtime Environment:
OS Name: Windows
OS Version: 10.0.18362
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\3.1.300\
Host (useful for support):
Version: 3.1.4
Commit: 0c2e69caa6
.NET Core SDKs installed:
2.1.514 [C:\Program Files\dotnet\sdk]
3.1.300 [C:\Program Files\dotnet\sdk]
.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.18 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.18 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.18 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download
该示例给出了 package not found 错误:
PS d:\test> dotnet new console --force
The template "Console Application" was created successfully.
Processing post-creation actions...
Running 'dotnet restore' on d:\test\test.csproj...
Determining projects to restore...
d:\test\test.csproj : error NU1101: Unable to find package Microsoft.AspNetCore.App.Ref. No packages exist with this id in source(s): Microsoft Visual Studio Offline Packages, Package source, Package source 1, Package source 2
Failed to restore d:\test\test.csproj (in 402 ms).
package 位于:C:\Program Files\dotnet\packs\Microsoft.AspNetCore.App.Ref\3.1.3 另外,如果我尝试将目标框架更改为 2.1,一切正常。
由 dotnet 命令行创建的 Default.csproj 文件。
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>netcoreapp3.1</TargetFramework>
</PropertyGroup>
</Project>
有什么我错过的吗?
编辑:运行干净后的 Output
PS d:\test> dotnet clean Microsoft (R) Build Engine 版本 16.6.0
+5ff7b0c9e for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.
Build started 5/30/2020 6:01:58 PM.
Build succeeded.
0 Warning(s)
0 Error(s)
Time Elapsed 00:00:01.71
PS d:\test> dotnet run
d:\test\test.csproj : error NU1101: Unable to find package Microsoft.AspNetCore.App.Ref. No packages exist with this id in source(s): Microsoft Visual Studio Offline Packages, Package source, Package source 1, Package source 2
The build failed. Fix the build errors and run again.
如果我只是更改 'netcore3.1' => 'netcore2.1' 并且一切正常。
感谢所有的建议。
我想通了这个问题。 我的 nuget 源列表没有关注,因此该工具从未尝试在线获取软件包。
https://api.nuget.org/v3/index.json
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