No Dockerfile could be found. Please make sure you have a Dockerfile called 'Dockerfile' adjacent to the project file

Question

I have moved the docker file from *.csproj folder to .sln folder i.e., one level up. When I try to docker build using visual studio 2019, I get bellow error but same project docker build works from command prompt. Not sure what is causing visual studio 2019 to throw this error. Any help to solve this error would be helpful.

Error: No Dockerfile could be found. Please make sure you have a Dockerfile called 'Dockerfile' adjacent to the project file.

Docker build works from commands prompt :

Answer 1

You can specify the path to the Dockerfile using the DockerfileFile property.

1. Start Visual Studio 2019 as Admin (necessary in my case)
2. Edit targeted .csproj
3. Add the DockerfileFile attribute with the relative path (parent folder in my case)
4. Keep the DockerfileContext as is.

Example csproj configuration:

<PropertyGroup>
    <TargetFramework>netcoreapp3.0</TargetFramework>
    <UserSecretsId>secretstuff</UserSecretsId>
    <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
    <DockerfileContext>.</DockerfileContext>
    <DockerfileFile>..\Dockerfile</DockerfileFile>    
    <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
</PropertyGroup>

5. Start the project in Debug mode with Docker (F5).