add a csharp sdk-examples #48

sdk-examples/csharp/nacos-csharp-01/.gitignore

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+bin/
+obj/
+.idea/

sdk-examples/csharp/nacos-csharp-01/Biz/AppFooConfig.cs

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+namespace nacos_csharp_01.Biz;
+
+public class AppFooConfig
+{
+    public string? Name { get; set; }
+    public int? Value { get; set; }
+    public string? Remark { get; set; }
+}

sdk-examples/csharp/nacos-csharp-01/Biz/AppFooListener.cs

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+using System.Text.Json;
+using Nacos.V2;
+
+namespace nacos_csharp_01.Biz;
+
+public class AppFooListener: IListener
+{
+    private readonly ILogger<AppFooListener> _logger;
+
+    private AppFooConfig? _config;
+
+    private readonly INacosConfigService _nacosConfigService;
+
+    public AppFooConfig? GetAppFooConfig()
+    {
+        return _config;
+    }
+
+    public AppFooListener(ILogger<AppFooListener> logger, INacosConfigService nacosConfigService)
+    {
+        this._logger = logger;
+        this._nacosConfigService = nacosConfigService;
+    }
+
+    public async Task AsyncInit()
+    {
+        try
+        {
+            _logger.LogInformation("AppFooListener is starting.");
+            await _nacosConfigService.AddListener("foo_config.json", "DEFAULT_GROUP", this);
+            string configInfo = await _nacosConfigService.GetConfig("foo_config.json","DEFAULT_GROUP",5000);
+            ReceiveConfigInfo(configInfo);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "AppFooListener is starting failed.");
+        }
+    }
+
+    public void ReceiveConfigInfo(string configInfo)
+    {
+        _logger.LogInformation($"Received config info: {configInfo}");
+        try
+        {
+            this._config = JsonSerializer.Deserialize<AppFooConfig>(configInfo);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError($"Failed to parse config info: {configInfo}", ex);
+        }
+    }
+}

sdk-examples/csharp/nacos-csharp-01/Biz/MyHostedService.cs

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+namespace nacos_csharp_01.Biz;
+
+public class MyHostedService: IHostedService
+{
+    private readonly ILogger<MyHostedService> _logger;
+    private readonly AppFooListener _appFooListener;
+
+    public MyHostedService(ILogger<MyHostedService> logger, AppFooListener appFooListener)
+    {
+        this._appFooListener = appFooListener;
+        this._logger = logger;
+    }
+
+    public async Task StartAsync(CancellationToken cancellationToken)
+    {
+        _logger.LogInformation("MyHostedService is starting.");
+        await _appFooListener.AsyncInit();
+    }
+
+    public Task StopAsync(CancellationToken cancellationToken)
+    {
+        _logger.LogInformation("MyHostedService is stopping.");
+        return Task.CompletedTask;
+    }
+}

sdk-examples/csharp/nacos-csharp-01/Controllers/ConfigController.cs

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+using Microsoft.AspNetCore.Mvc;
+using nacos_csharp_01.Biz;
+using Nacos.V2;
+
+namespace nacos_csharp_01.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+public class ConfigController
+{
+    private readonly ILogger<ConfigController> _logger;
+    private readonly AppFooListener _appFooListener;
+    private readonly INacosConfigService _nacosConfigService;
+
+    public ConfigController(AppFooListener appFooListener, INacosConfigService nacosConfigService,
+        ILogger<ConfigController> logger)
+    {
+        this._logger = logger;
+        this._appFooListener = appFooListener;
+        this._nacosConfigService = nacosConfigService;
+    }
+
+    [HttpGet("get")]
+    public async Task<String> Get(String key)
+    {
+        _logger.LogInformation("Get config:"+key);
+        var res = await _nacosConfigService.GetConfig(key,"DEFAULT_GROUP",3000).ConfigureAwait(false);
+        return res ?? "[empty config]";
+    }
+
+    [HttpGet("set")]
+    public async Task<String> Set(String key)
+    {
+        _logger.LogInformation("Publish config:"+key);
+        var res = await _nacosConfigService.PublishConfig(key,"DEFAULT_GROUP",new System.Random().Next(1,999999).ToString()).ConfigureAwait(false);
+        return "Publish ok,"+res;
+    }
+
+    [HttpGet("get_config_name")]
+    public String GetConfigName()
+    {
+        var res = _appFooListener.GetAppFooConfig()?.Name;
+        return res ?? "[empty foo config]";
+    }
+}

sdk-examples/csharp/nacos-csharp-01/Program.cs

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+using nacos_csharp_01.Biz;
+using Nacos.AspNetCore.V2;
+using Nacos.V2.DependencyInjection;
+
+var builder = WebApplication.CreateBuilder(args);
+
+builder.Services.AddNacosV2Naming(builder.Configuration);
+builder.Services.AddNacosV2Config(builder.Configuration);
+builder.Services.AddNacosAspNet(builder.Configuration);
+
+builder.Services.AddControllers();
+builder.Services.AddSingleton<AppFooListener>();
+builder.Services.AddHostedService<MyHostedService>();
+
+var app = builder.Build();
+
+app.MapGet("/", () => "Hello World!");
+app.MapControllers();
+
+app.Run();

sdk-examples/csharp/nacos-csharp-01/Properties/launchSettings.json

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+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:65406",
+      "sslPort": 44347
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "http://localhost:5142",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "https://localhost:7166;http://localhost:5142",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

sdk-examples/csharp/nacos-csharp-01/README.md

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+# nacos-csharp 说明
+
+配置中心使用样例
+
+## 使用方式
+
+1. 启动r-nacos  
+2. 运行应用, 在本项目目录运行: `dotnet run --urls 'http://*:5215'`
+3. 访问应用接口:
+    + 设置配置 `curl -i 'http://127.0.0.1:5215/api/config/set?key=abc'`
+    + 获取配置 `curl -i 'http://127.0.0.1:5215/api/config/set?key=abc'`
+    + 获取指定应用配置 `curl -i 'http://127.0.0.1:5215/api/config/get_config_name`
+4. 验证动态修改配置能力，在r-nacos控制台中修改第3步对应的配置内容再查询配置内容信息会更新;
+
+
+

sdk-examples/csharp/nacos-csharp-01/appsettings.Development.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

sdk-examples/csharp/nacos-csharp-01/appsettings.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "nacos": {
+    "EndPoint": "",
+    "ServerAddresses": [ "http://localhost:8848" ],
+    "DefaultTimeOut": 15000,
+    "Namespace": "net-test",
+    "ListenInterval": 1000,
+    "ServiceName": "App2",
+    "GroupName": "DEFAULT_GROUP",
+    "ClusterName": "DEFAULT",
+    "Ip": "",
+    "PreferredNetworks": "",
+    "Port": 0,
+    "Weight": 100,
+    "RegisterEnabled": true,
+    "InstanceEnabled": true,
+    "Ephemeral": true,
+    "Secure": false,
+    "AccessKey": "",
+    "SecretKey": "",
+    "UserName": "",
+    "Password": "",
+    "ConfigUseRpc": true,
+    "NamingUseRpc": true,
+    "NamingLoadCacheAtStart": "",
+    "Metadata": {
+      "preserved.register.source": "Test",
+      "aa": "bb",
+      "cc": "dd"
+    }
+  },
+  "AllowedHosts": "*"
+}

sdk-examples/csharp/nacos-csharp-01/nacos-csharp-01.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <RootNamespace>nacos_csharp_01</RootNamespace>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="nacos-sdk-csharp" Version="1.3.10" />
+    <PackageReference Include="nacos-sdk-csharp.AspNetCore" Version="1.3.10" />
+  </ItemGroup>
+
+</Project>