protoc-gen-grpc 文件名、目录名或卷标语法不正确

Question

Hi I'm tring to build a C# program which uses protobuf. When I do it on my computer everything is fine. But I copied the project to another computer and try to rebuild the program and that error comes out.

protoc-gen-grpc The filename, directory name, or volume label syntax is incorrect

I'm using VisualStudio 2019 and on indication about where or what line causes the problem. There are countless lins of code so I don't know what to show. I've serched the google but usually finds answers for this error

The filename, directory name, or volume label syntax is incorrect

or

protoc-gen-grpc: The system cannot find the file specified

this error.

Answer 1

It's confusing.

TL;DR protoc-gen-grpc is a plugin for the protoc compiler that enables it to generate gRPC sources for one of the supported languages eg C#

The compiler ( protoc ) converts protocol buffers files to language-specific sources. gRPC extends protocol buffers. In order to generate source code from gRPC protos you often need 2 plugins for each language. One to generate the proto messages and another (in your case protoc-gen-grpc ) to compile the services/rpcs.

C# is additionally confusing because you've .NET Framework and .NET Core and, it appears, there's a new implementation.

I recommend you view the gRPC for .NET content on gRPC and The future of gRPC in C# belongs to grpc-dotnet