Asp.Net Core Web MVC 调用Grpc，采用依赖注入

1、新建Asp.net Core Web Mvc项目

 2、Nuget包下载安装

Grpc.Net.Client
Google.ProtoBuf
Grpc.Tools

3、新建Protos文件夹，复制之前文章Grpc服务器的greet.proto文件

syntax = "proto3";

option csharp_namespace = "MyGrpcWeb";

package MyGrpc;

// The greeting service definition.
service TestGrpc {
  // Sends a greeting
  rpc TestSay (TestRequest) returns (TestReply);

  rpc StreamingFromServer(ExampleRequest) returns (stream ExampleResponse);

  rpc StreamingFromClient(stream ExampleRequest) returns (ExampleResponse);

  rpc StreamingBothWays(stream ExampleRequest) returns (stream ExampleResponse);
}

// The request message containing the user's name.
message TestRequest {
  string name = 1;
}

// The response message containing the greetings.
message TestReply {
  string message = 1;
}

message ExampleRequest{
int32 pageIndex=1;
int32 pageSize=2;
bool isDescending=3;
}

message ExampleResponse{
string name=1;
string sex=2;
}

4、修改WebApplication1.csproj 文件，添加以下内容

  <ItemGroup>
    <Protobuf Include="Protosgreet.proto" GrpcServices="Client" />
  </ItemGroup>

5、添加GrpcService文件夹，添加GrpcServer.cs

    public class GrpcServer
    {
        private readonly TestGrpc.TestGrpcClient _testGrpcClient;
        private readonly GrpcChannel _channel;

        public TestGrpc.TestGrpcClient MyGrpcClient
        {
            get { return _testGrpcClient; }
        }
        public GrpcServer()
        {
            _channel = GrpcChannel.ForAddress("http://localhost:5000");
            _testGrpcClient = new TestGrpc.TestGrpcClient(_channel);
        }

    }

6、修改 Startup.cs

 public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllersWithViews();
            services.AddSingleton<GrpcServer>(new GrpcServer());
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }
            app.UseHttpsRedirection();
            app.UseStaticFiles();
            
            app.UseRouting();

            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller=Home}/{action=Index}/{id?}");
            });
        }
    }

7、修改 Program.cs

public class Program
    {
        public static void Main(string[] args)
        {
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
            
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                    webBuilder.UseUrls("http://localhost:5003");
                });
    }

8、修改 HomeController.cs

 public class HomeController : Controller
    {
        private readonly ILogger<HomeController> _logger;
        private readonly GrpcServer _grpcServer;

        public HomeController(ILogger<HomeController> logger,GrpcServer grpcServer)
        {
            _logger = logger;
            _grpcServer = grpcServer;
        }

        public IActionResult Index()
        {
            var ret = _grpcServer.MyGrpcClient.TestSay(new TestRequest { Name = "MyAspNetCoreMvc" });
            string msg = ret.Message;
            ViewData["GrpcMsg"] = msg;
            return View();
        }

        public IActionResult Privacy()
        {
            return View();
        }

        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
        }
    }

9、修改Index.cshtml

@{
    ViewData["Title"] = "Home Page";
}

<div class="text-center">
    <h1 class="display-4">Welcome</h1>
    <h2>发送消息的用户：@ViewData["GrpcMsg"] </h2>
    <p>Learn about <a href="https://docs.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p>
</div>

 10、浏览器输入http://localhost:5003