`.NET Core` 2.2 升級 3.1
===

嚴重性	程式碼	說明	專案	檔案	行	隱藏項目狀態
警告	CS0618	'CompatibilityVersion.Version_2_2' 已經過時: 'This CompatibilityVersion value is obsolete. The recommended alternatives are Version_3_0 or later.'	TLDE.Frontend.Host	C:\Azure\TLDE.Service\TLDE.Frontend.Host\Startup.cs	43	作用中

`services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);`
改成

services.AddControllers();

嚴重性	程式碼	說明	專案	檔案	行	隱藏項目狀態
警告	CS0618	'IHostingEnvironment' 已經過時: 'This type is obsolete and will be removed in a future version. The recommended alternative is Microsoft.AspNetCore.Hosting.IWebHostEnvironment.'	TLDE.Frontend.Host	C:\Azure\TLDE.Service\TLDE.Frontend.Host\Startup.cs	46	作用中

`IHostingEnvironment` 改成 `IWebHostEnvironment`

[參考 - 從 ASP.NET Core 2.2 遷移至 3.0](https://docs.microsoft.com/zh-tw/aspnet/core/migration/22-to-30?view=aspnetcore-3.1&tabs=visual-studio)

移除 `Microsoft.AspNetCore.App` 與 `Microsoft.AspNetCore.Razor.Design`

warning MVC1005: Using 'UseMvc' to configure MVC is not supported while using Endpoint Routing. To continue using 'UseMvc', please set 'MvcOptions.EnableEndpointRouting = false' inside 'ConfigureServices'.

`app.UseMvc();`
改成

app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
    endpoints.MapControllers();
});

[](https://stackoverflow.com/questions/53675850/how-to-fix-the-cors-protocol-does-not-allow-specifying-a-wildcard-any-origin)

The CORS protocol does not allow specifying a wildcard (any) origin and credentials at the same time. Configure the CORS policy by listing individual origins if credentials needs to be supported.

刪除程式碼

app.UseCors(
                builder => builder
                .AllowAnyOrigin()
                .AllowAnyMethod()
                .AllowAnyHeader()
                .AllowCredentials());


System.InvalidOperationException: Synchronous operations are disallowed. Call ReadAsync or set AllowSynchronousIO to true instead.
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpRequestStream.Read(Byte[] buffer, Int32 offset, Int32 count)
   at System.IO.StreamReader.ReadBuffer()
   at System.IO.StreamReader.ReadToEnd()
   at CArk.Host.DotNetCore.CArkHostDotNetCore.ProcessRequest(HttpContext context, Func`1 next)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

新增程式碼

public void ConfigureServices(IServiceCollection services)
{
    services.AddControllers();

    services.AddCors(options =>
    {
        options.AddPolicy("CorsPolicy",
            builder => builder
            .AllowAnyOrigin()
            .AllowAnyMethod()
            .AllowAnyHeader());
    });
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    app.UseDeveloperExceptionPage();

    app.UseCors("CorsPolicy");

    app.UseCArkSDK(new CArkBaseServicesHost("TLDE", ConfMgr.Instance._config,
        new Assembly[] {
            typeof(Service_Echo).Assembly, // Health Check
            typeof(ContractRequest_Echo).Assembly, // Health Check
            typeof(Service_Room_RoomCategoryListALL).Assembly,
            typeof(CReq_RoomCategory_ListALL).Assembly
        }));
}

[參考 - .Net Core 3 preview: Synchronous operations are disallowed
](https://stackoverflow.com/questions/55052319/net-core-3-preview-synchronous-operations-are-disallowed)

public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllers();

            services.AddCors(options =>
            {
                options.AddPolicy("CorsPolicy",
                    builder => builder
                    .AllowAnyOrigin()
                    .AllowAnyMethod()
                    .AllowAnyHeader());
            });
        }

改成

public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllers();

            services.AddCors(options =>
            {
                options.AddPolicy("CorsPolicy",
                    builder => builder
                    .AllowAnyOrigin()
                    .AllowAnyMethod()
                    .AllowAnyHeader());
            });
            services.Configure<KestrelServerOptions>(options =>
            {
                options.AllowSynchronousIO = true;
            });
            services.Configure<IISServerOptions>(options =>
            {
                options.AllowSynchronousIO = true;
            });
        }

`FolderProfileDebug.pubxml` 檔案裡的

<TargetFramework>netcoreapp3.1</TargetFramework>

記得改成 3.1 發布才能正常編譯
還有所有原本是 `netstandard2.0`

<TargetFramework>netstandard2.0</TargetFramework>

要改成 `netstandard2.1`

<TargetFramework>netstandard2.1</TargetFramework>

記得是因為 3.0 之後就只支援 netstandard2.1
不然發布時也會編譯不過

###### tags: `.NET Core` `工作紀錄`