Import "google/api/annotations.proto" was not found or had errors

[rabejens]

I followed the three steps in your blog but I am getting above error.

What else do I have to do to make the dependencies available?

[JamesNK]

You need to have a copies of a couple of proto files in your project. I've updated the instructions: http://james.newtonking.com/archive/2020/03/31/introducing-grpc-http-api

[mfc19]

@JamesNK I followed the instructions and in my .Net project I still have build errors:

Error Import "google/api/annotations.proto" was not found or had errors.

I have the google files in a google\api directory in my project

[dennisroche]

I found in VS 2019 Preview and in the gRPC HTTP API sample that I needed to include the google *.proto files into the project.

The most effective way I've found to do this is:

    <Protobuf Include="..\Proto\google\api\*.proto">
      <Link>Protos\google\api\%(Filename)%(Extension)</Link>
    </Protobuf>

[Pao-lino]

@mfc19 I've have the same issue, did you find a solution ?
EDIT: solved by this
#167 (comment)

[sailingKieler]

Hi, I just wanna add my two cents in here, it might help others in future.

I'm new to building a gRPC client within an ASP.NET backend app (using net8.0), and I got the Protobuf definitions supplied by another party, requiring google/api/annotations.proto and others beyond the Protobuf Well-known Types. Here's how I solved it:

• There's the NuGet package Google.Api.CommonProtos that contains annotations.proto and many more, and which I imported as follows. Note the setting of GeneratePathProperty="true".

<PackageReference Include="Google.Api.CommonProtos" Version="2.15.0" GeneratePathProperty="true" />
<PackageReference Include="Google.Protobuf" Version="3.27.3" />
<PackageReference Include="Grpc.Tools" Version="2.65.0" PrivateAssets="All" />

• After dotnet restore you will find the google/**/*.protos in <userHome>/.nuget/packages/google.api.commonprotos/2.15.0/content/protos/
• I then registered my proto files including an additional setting of AdditionalImportDirs like this

<Protobuf ProtoRoot="Proto" Include="Proto/**/*.proto" GrpcServices="Client" AdditionalImportDirs="$(PkgGoogle_Api_CommonProtos)/content/protos"/>

• run dotnet build

Et voilà! 🎉