private const string ServerAdderss = "https://localhost:5001"; //服务端的地址 protected void GetEmployeeById() { Response1 = string.Empty; //清空前台显示 var metaData = new Metadata //元数据都是一些 key-value对 { { "myKey", "myValue" } //随便假装一点 key-value对 }; if (int.TryParse(Request1, out var id)) { //*****************************主要是这里******************************** using var channel = GrpcChannel.ForAddress(ServerAdderss, new GrpcChannelOptions { HttpClient = _httpClient }); //创建通道 var client = new EmployeeService.EmployeeServiceClient(channel); try { var response = client.GetEmployeeById( new GetEmployeeByIdRequest { Id = id } //参数一:request参数(员工Id) , metaData); //参数二:用户自定义的元数据 Response1 = response.ToString(); //将响应信息输出前台显示 } catch (Exception e) { MessageBox.Show(e.Message); } //********************************************************************* return; } MessageBox.Show("request is unValid"); }