public Employee GetEmployee() { //传入元数据 var md = new Metadata { { "username", "jack" }, { "role", "admin" } }; using var channel = GrpcChannel.ForAddress("http://localhost:6001"); var client = new EmployeeService.EmployeeServiceClient(channel); return(client.GetByNo(new GetByNoRequest { No = 1994 }, md).Employee); }