C# .NET Blazor MAUI Xamarin Research: MVP2021

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2021年7月26日星期一

ASP.NET Core 應該具備知識 - 日誌記錄

ASP.NET Core 應該具備知識

ASP.NET Core 應用程式啟動與 Startup 類別

ASP.NET Core 靜態檔案 UseStaticFiles

ASP.NET Core 相依性注入設計模式 Dependency Injection

ASP.NET Core 中介軟體 Middleware

ASP.NET Core 設定 Configuration

ASP.NET Core 選項模式 IOptions

ASP.NET Core 日誌記錄 Logger

ASP.NET Core 從空白專案建立 Blazor 應用

建立一個 ASP.NET Core MVC 專案

開啟 Visual Studio 2019
在 [Visual Studio 2019] 對話窗中，點選右下方的 [建立新的專案] 選項
在 [建立新專案] 對話窗中，在中間上方的專案範本過濾條件中
1. 設定程式語言為 [C#]
2. 設定專案範本為 [Web]
3. 選擇專案範本項目清單，點選 [ASP.NET Core Web API] 這個專案範本項目
  用於建立 ASP.NET Core 應用程式的專案範本，附有 RESTful HTTP 服務的控制器範例。此範本也可用於 ASP.NET Core MVC 的檢視及控制器。
4. 點選右下方的 [下一步] 按鈕
在 [設定新的專案] 對話窗出現後
在 [專案名稱] 內，輸入 AC07
點選右下角的 [下一步] 按鈕
在 [其他資訊] 對話窗出現後，確認 [目標 Framework] 的下拉選單要選擇 [.NET 5.0 (目前)]
點選右下角的 [建立] 按鈕

建立服務類別與介面

滑鼠右擊專案節點
從彈出功能表來選取 [加入] > [類別]
當出現 [新增項目 - AC07] 對話窗
在下方 [名稱] 欄位輸入 [UnhandledExceptionMiddleware.cs]
在右下方點選 [新增] 按鈕
使用底下的程式碼替換掉這個檔案原先內容

using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using System;
using System.Threading.Tasks;

namespace AC07
{
    public class UnhandledExceptionMiddleware
    {
        private readonly ILogger logger;
        private readonly RequestDelegate next;

        public UnhandledExceptionMiddleware(ILogger<UnhandledExceptionMiddleware> logger, RequestDelegate next)
        {
            this.logger = logger;
            this.next = next;
        }

        public async Task Invoke(HttpContext context)
        {
            try
            {
                await next(context);
                if(IsSuccessStatusCode(context.Response))
                {
                    logger.LogDebug($"HTTP 回應成功 {context.Response.StatusCode}");
                }
                else
                {
                    logger.LogWarning($"HTTP 回應不是成功代碼 {context.Response.StatusCode}");
                }
            }
            catch (Exception exception)
            {
                logger.LogError(exception,
                    $"Request {context.Request?.Method}: {context.Request?.Path.Value} failed");
            }
        }
        public bool IsSuccessStatusCode(HttpResponse response)
        {
            return response.StatusCode >= 200 && response.StatusCode <= 299;
        }
    }
}

設計新的 API 控制器

滑鼠右擊 [Controllers] 資料夾
從彈出功能表清單中點選 [加入] > [控制器]
當 [新增 Scaffold 項目] 對話窗出現之後
依序點選 [已安裝] > [通用] > [API] > [API 控制器 - 空白]
點選右下角的 [加入] 按鈕
現在將會看到 [新增項目 - AC07] 對話窗
在下方的 [名稱] 欄位中輸入 WebLogController
點選右下方 [新增] 按鈕
使用底下的程式碼替換這個檔案內容

using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using System;
using System.Diagnostics;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

namespace AC07.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class WebLogController : ControllerBase
    {
        public WebLogController(ILogger<WebLogController> logger)
        {
            Logger = logger;
        }

        public ILogger<WebLogController> Logger { get; }

        [HttpGet]
        public async Task<string> Get()
        {
            StringBuilder result = new StringBuilder();

            var client = new HttpClient();

            try
            {
                Stopwatch stopwatch = new Stopwatch();
                stopwatch.Start();
                
                Logger.LogDebug($"開始讀取 Google 網頁資料");
                string message = await client.GetStringAsync("http://www.google.com");
                Logger.LogInformation($"完成讀取 Google 網頁資料");
                stopwatch.Stop();
                result.Append($"讀取 google 資料共花費 {stopwatch.ElapsedMilliseconds} ms" + Environment.NewLine);
                
                Logger.LogInformation($"開始讀取 m1cr050ft 網頁資料");
                message = await client.GetStringAsync("http://www.m1cr050ft.com");
                Logger.LogInformation($"完成讀取 m1cr050ft 網頁資料");
                result.Append($"讀取 micr0s0ft 資料共花費 {stopwatch.ElapsedMilliseconds} ms" + Environment.NewLine);
            }
            catch (Exception ex)
            {
                Logger.LogError(ex, $"使用 HttpClient 發生了問題");
            }

            return result.ToString();
        }
    }
}

執行這個專案

請按下 [F5] 按鍵，開始執行這個專案
瀏覽器的畫面如下
請在瀏覽器上輸入 https://localhost:5001/api/WebLog 網址
將會看到底下的畫面
切換到執行這個專案的 [命令提示字元視窗] 下
將會看到底下的內容

info: AC07.Controllers.WebLogController[0]
      完成讀取 Google 網頁資料
info: AC07.Controllers.WebLogController[0]
      開始讀取 m1cr050ft 網頁資料
fail: AC07.Controllers.WebLogController[0]
      使用 HttpClient 發生了問題
      System.Net.Http.HttpRequestException: Response status code does not indicate success: 403 (Forbidden).
         at System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode()
         at System.Net.Http.HttpClient.GetStringAsyncCore(HttpRequestMessage request, CancellationToken cancellationToken)
         at AC07.Controllers.WebLogController.Get() in D:\Vulcan\GitHub\Blazor-Xamarin-Full-Stack-HOL\Examples\AC07\AC07\Controllers\WebLogController.cs:line 41
warn: AC07.UnhandledExceptionMiddleware[0]
      HTTP 回應不是成功代碼 404

在這個 public async Task<string> Get() 方法內，看到原本對於有呼叫 Logger.LogDebug($"開始讀取 Google 網頁資料"); 方法，要把這段文字內容寫入到日誌提供者內，可是卻沒有看到；而其他有使用到 [Logger] 物件所產出的日誌輸出，都可以在 [命令提示字元視窗] 下看到。

對於呼叫 await client.GetStringAsync("http://www.m1cr050ft.com"); 方法之後，因為該網址不存在，所以，會拋出例外異常，這裡也會被 try {...} catch{...} 敘述捕捉起來，並且透過 Logger.LogError(ex, $"使用 HttpClient 發生了問題"); 敘述將這個例外異常訊息寫入到日誌提供者內。

修正那些日誌資訊可以看得到

現在要來解決為什麼執行 Logger.LogDebug($"開始讀取 Google 網頁資料"); 敘述，但是在 [命令提示字元視窗] 內沒有出現；要理解這個問題，要先來看看 [appsettings.json]這個檔案的內。

底下為 [appsettings.json] 檔案內的內容

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*"
}

在第一個 [Logging] 屬性是用來設定日誌輸出設定
從 [LogLevel] > [Default] 的屬性值看到，這個日誌提供者僅會針對 [Information] 以上等級的日誌才會寫入輸出
若此時變更 [LogLevel] > [Default] 屬性值為 [Trace]
按下 [Ctrl] + [F5] 按鈕，停止這個專案執行
請按下 [F5] 按鍵，開始執行這個專案
請在瀏覽器上輸入 https://localhost:5001/api/WebLog 網址
切換到執行這個專案的 [命令提示字元視窗] 下
將會看到底下的內容

info: AC07.Controllers.WebLogController[0]
      完成讀取 Google 網頁資料
info: AC07.Controllers.WebLogController[0]
      開始讀取 m1cr050ft 網頁資料
fail: AC07.Controllers.WebLogController[0]
      使用 HttpClient 發生了問題
      System.Net.Http.HttpRequestException: Response status code does not indicate success: 403 (Forbidden).
         at System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode()
         at System.Net.Http.HttpClient.GetStringAsyncCore(HttpRequestMessage request, CancellationToken cancellationToken)
         at AC07.Controllers.WebLogController.Get() in D:\Vulcan\GitHub\Blazor-Xamarin-Full-Stack-HOL\Examples\AC07\AC07\Controllers\WebLogController.cs:line 41
warn: AC07.UnhandledExceptionMiddleware[0]
      HTTP 回應不是成功代碼 404

不過，還是沒有看到 Logger.LogDebug($"開始讀取 Google 網頁資料"); 這個日誌的輸出
這是因為對於 [ASP.NET Core 設定] 功能
對於在開發除錯模式下
當要讀取設定屬性值，會先讀取 [appsettings.json] 內的設定屬性值
底下為 [appsettings.Development.json] 檔案內的內容

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  }
}

接著，會來讀取 [appsettings.Development.json] 內的設定屬性值，並且會優先使用這個檔案內的屬性值

因此，雖然在 [appsettings.json] 內變更 [LogLevel] > [Default] 屬性值為 [Trace]，不過在 [appsettings.Development.json] 內的 [LogLevel] > [Default] 屬性值為 [Information]，所以，還是排除掉了 [Debug] 這個等級的日誌訊息。

現在修正 [appsettings.Development.json] 內的 [LogLevel] > [Default] 屬性值為 [Trace]
按下 [Ctrl] + [F5] 按鈕，停止這個專案執行
請按下 [F5] 按鍵，開始執行這個專案
請在瀏覽器上輸入 https://localhost:5001/api/WebLog 網址
切換到執行這個專案的 [命令提示字元視窗] 下
將會看到底下的內容

dbug: AC07.UnhandledExceptionMiddleware[0]
      HTTP 回應成功 200
dbug: AC07.UnhandledExceptionMiddleware[0]
      HTTP 回應成功 200
dbug: AC07.Controllers.WebLogController[0]
      開始讀取 Google 網頁資料
info: AC07.Controllers.WebLogController[0]
      完成讀取 Google 網頁資料
info: AC07.Controllers.WebLogController[0]
      開始讀取 m1cr050ft 網頁資料
fail: AC07.Controllers.WebLogController[0]
      使用 HttpClient 發生了問題
      System.Net.Http.HttpRequestException: Response status code does not indicate success: 403 (Forbidden).
         at System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode()
         at System.Net.Http.HttpClient.GetStringAsyncCore(HttpRequestMessage request, CancellationToken cancellationToken)
         at AC07.Controllers.WebLogController.Get() in D:\Vulcan\GitHub\Blazor-Xamarin-Full-Stack-HOL\Examples\AC07\AC07\Controllers\WebLogController.cs:line 41
dbug: AC07.UnhandledExceptionMiddleware[0]
      HTTP 回應成功 200
warn: AC07.UnhandledExceptionMiddleware[0]

HTTP 回應不是成功代碼 404

2021年7月24日星期六

.NET 6 Preview 5 MAUI App 體驗使用經驗 1

2021 年 6 月 17 日，微軟發表的 .NET 6 Preview 5 ， Announcing .NET 6 Preview 5 ，所以，這篇文章將會來驗看看有那些新功能與不錯的特色推出。

為了要能夠輕鬆的進行使用 .NET 6 Preview 5 這個系統，特別重新安裝作業系統到最新的 Windows Updates，接著安裝 Visual Studio 2019 Preview 工具，並使用 Download .NET 6.0 文章來進行安裝最新的 .NET 6.0 Preview 5 相關軟體。

為了要能夠順利建立專案等環境，這裡還需要安裝兩個 Visual Studio 擴充功能 Project Reunion (Preview) 與 Single-project MSIX Packaging Tools ，這裡將會安裝 Windows UI Library (WinUI) 開發環境到 Visual Studio 內。

以上的準備工作若都完成後，將會根據 Announcing .NET MAUI Preview 5 與 .NET Multi-platform App UI documentation 文章來進行 Maui 的安裝與設定

安裝與檢查 Maui 是否完整

為了要驗證 Maui 開發環境是否完整，可以透過底下的程序來進行檢查是否欠缺甚麼元件尚未安裝，或者需要進行升級。

首先安裝 maui-check 這個工具，這裡可以透過底下的指令來完成，請在命令提示字元視窗內執行這個指令

dotnet tool install -g redth.net.maui.check

一旦安裝完成之後，就可以執行 [maui-check] 指令，請在命令提示字元視窗內執行這個指令

maui-check

在作者本身的環境為全新安裝的 Windows 10 作業系統，並且升級到最新 Windows Update，接著安裝 Visual Studio 2019 Preview 版本，並選取了需要用到的 [工作負載]；而當執行了 maui-check 指令之後，會出現文章最後面所列出的相關內容，不過，在這裡檢查出底下的問題，這些問題應該是安裝好工具之後，尚未做相關的初始化設定所導致的，不過，因為 maui-check 的幫忙，可以順利修正這些問題

? Recommendation: Install OpenJDK11
在這裡將會發現預設 Android SDK 安裝好之後，沒有使用 [Microsoft OpenJDK]，因此，將會詢問是否要更換使用 [OpenJDK] 呢？在這裡將會回答 Yes，使用 [OpenJDK] 來替換

! Attempt to fix? [y/n] (y): y
? Attempting to fix: OpenJDK 11.0
  Installing Download and Install Microsoft OpenJDK 11...
  Installed Download and Install Microsoft OpenJDK 11.

? Recommendation: Install or Update Android SDK packages
接下來則是發現到 Android SDK 預設安裝後，並不是最新的版本，因此將會建議來更新到最新版本，或者安裝尚未發現到的 SDK 軟體，在這裡回答 Yes

Your Android SDK has missing or outdated packages.
You can use the Android SDK Manager to install / update them.
For more information see: https://aka.ms/dotnet-androidsdk-help

! Attempt to fix? [y/n] (y): y

? Recommendation: Install Missing SDK Workloads
在預設安裝 Visual Studio 的環境內發現到欠缺一些 SDK 工作負載，因此，回答 Yes 來進行安裝

! Attempt to fix? [y/n] (y): y

? Recommendation: Install Missing SDK Packs
最後發現到有些 SDK Pack 沒有安裝，因此，回答 Yes 來進行安裝

! Attempt to fix? [y/n] (y): y

這裡將會是已經更新到最新狀態的結果

      _   _   _____   _____     __  __      _      _   _   ___
     | \ | | | ____| |_   _|   |  \/  |    / \    | | | | |_ _|
     |  \| | |  _|     | |     | |\/| |   / _ \   | | | |  | |
  _  | |\  | | |___    | |     | |  | |  / ___ \  | |_| |  | |
 (_) |_| \_| |_____|   |_|     |_|  |_| /_/   \_\  \___/  |___|

? .NET MAUI Check v0.5.6.0 ?
────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
This tool will attempt to evaluate your .NET MAUI development environment.
If problems are detected, this tool may offer the option to try and fix them for you, or suggest a way to fix them
yourself.

Thanks for choosing .NET MAUI!
────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
? Synchronizing configuration... ok
? Scheduling appointments... ok

? OpenJDK 11.0 Checkup...
  – 11.0.10 (C:\Program Files\Microsoft\jdk-11.0.10.9-hotspot\bin\..)
  – 1.8.0-25 (C:\Program Files\Android\Jdk\microsoft_dist_openjdk_1.8.0.25)

? Visual Studio 16.10.0 Checkup...
  – 16.11.0-pre.2.0 - C:\Program Files (x86)\Microsoft Visual Studio\2019\Preview

? Android SDK Checkup...
  – emulator (30.6.5)
  – build-tools;30.0.2 (30.0.2)
  – platforms;android-30 (3)
  – system-images;android-30;google_apis;x86 (9)
  – platform-tools (30.0.4)

? Android Emulator Checkup...
  ! Unable to find any Android Emulators.  You can use Visual Studio to create one if necessary:
https://docs.microsoft.com/xamarin/android/get-started/installation/android-emulator/device-manager

? .NET SDK Checkup...
  – 5.0.400-preview.21277.10 - C:\Program Files\dotnet\sdk\5.0.400-preview.21277.10
  – 6.0.100-preview.5.21302.13 - C:\Program Files\dotnet\sdk\6.0.100-preview.5.21302.13

? .NET SDK - Workload Deduplication Checkup...

? .NET SDK - EnableWorkloadResolver.sentinel Checkup...
  – C:\Program Files (x86)\Microsoft Visual
Studio\2019\Preview\MSBuild\Current\Bin\SdkResolvers\Microsoft.DotNet.MSBuildSdkResolver\EnableWorkloadResolver.sentinel
exists.

? .NET SDK - Workloads (6.0.100-preview.5.21302.13) Checkup...
  – microsoft-android-sdk-full (Microsoft.NET.Sdk.Android.Manifest-6.0.100 : 30.0.100-preview.5.28) installed.
  – microsoft-ios-sdk-full (Microsoft.NET.Sdk.iOS.Manifest-6.0.100 : 14.5.100-preview.5.894) installed.
  – microsoft-maccatalyst-sdk-full (Microsoft.NET.Sdk.MacCatalyst.Manifest-6.0.100 : 14.5.100-preview.5.894) installed.
  – microsoft-tvos-sdk-full (Microsoft.NET.Sdk.tvOS.Manifest-6.0.100 : 14.5.100-preview.5.894) installed.
  – microsoft-macos-sdk-full (Microsoft.NET.Sdk.macOS.Manifest-6.0.100 : 11.3.100-preview.5.894) installed.

? .NET SDK - Packs (6.0.100-preview.5.21302.13) Checkup...
  – Microsoft.Maui.Templates (6.0.100-preview.5.794) installed.
  – Microsoft.Android.Sdk (30.0.100-preview.5.28) installed.
  – Microsoft.Android.Sdk.BundleTool (30.0.100-preview.5.28) installed.
  – Microsoft.Android.Ref (30.0.100-preview.5.28) installed.
  – Microsoft.Android.Templates (30.0.100-preview.5.28) installed.
  – Microsoft.iOS.Sdk (14.5.100-preview.5.894) installed.
  – Microsoft.iOS.Windows.Sdk (14.5.100-preview.5.894) installed.
  – Microsoft.iOS.Ref (14.5.100-preview.5.894) installed.
  – Microsoft.iOS.Templates (14.5.100-preview.5.894) installed.
  – Microsoft.MacCatalyst.Sdk (14.5.100-preview.5.894) installed.
  – Microsoft.MacCatalyst.Ref (14.5.100-preview.5.894) installed.
  – Microsoft.MacCatalyst.Templates (14.5.100-preview.5.894) installed.
  – Microsoft.tvOS.Sdk (14.5.100-preview.5.894) installed.
  – Microsoft.tvOS.Ref (14.5.100-preview.5.894) installed.
  – Microsoft.tvOS.Templates (14.5.100-preview.5.894) installed.
  – Microsoft.macOS.Sdk (11.3.100-preview.5.894) installed.
  – Microsoft.macOS.Ref (11.3.100-preview.5.894) installed.
  – Microsoft.macOS.Templates (11.3.100-preview.5.894) installed.
────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────



! Things look almost great, except some pesky warning(s) which may or may not be a problem, but at least if they are,
you'll know where to start searching!

Press enter to exit...

建立 Maui 的專案

現在可以開啟 Visual Studio
建立一個新的專案
在 [建立新專案] 對話窗內切換選擇 [所有專案類型] 下拉選單控制項內的清單項目為 [MAUI]

在中間的清單內點選 [.NET MAUI App] 項目
點選 [下一步] 按鈕
在 [設定新的專案] 對話窗內，點選 [建立] 按鈕
稍微等候將會建立這個 [.NET MAUI App] 專案
一旦專案建立之後，依據底下截圖，切換使用 [Android] 平台來執行這個專案
底下截圖將會執行後的結果
現在來查看 [方案總管] 視窗，為 [Maui] 專案的結構
其中，將會看到 [MainPage.xaml] 檔案，將會是這個頁面的設計內容

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="MauiApp1.MainPage"
             BackgroundColor="{DynamicResource PageBackgroundColor}">

    <ScrollView Padding="{OnPlatform iOS='30,60,30,30', Default='30'}">
        <StackLayout>
            <Grid RowSpacing="25" RowDefinitions="Auto,Auto,Auto,Auto,*">
            
                <Label Text="Hello, World!"
                    Grid.Row="0"
                    SemanticProperties.HeadingLevel="Level1"
                    FontSize="32"
                    HorizontalOptions="CenterAndExpand" />

                <Label Text="Welcome to .NET Multi-platform App UI"
                    Grid.Row="1"
                    SemanticProperties.Hint="Counts the number of times you click" 
                    FontSize="16"
                    HorizontalOptions="CenterAndExpand" />

                <Label Text="Current count: 0"
                    Grid.Row="2"
                    SemanticProperties.Hint="Counts the number of times you click"
                    FontSize="18"
                    FontAttributes="Bold"
                    x:Name="CounterLabel"
                    HorizontalOptions="Center" />

                <Button Text="Click me"
                    Grid.Row="3"
                    SemanticProperties.Hint="Counts the number of times you click"
                    Clicked="OnCounterClicked"
                    HorizontalOptions="Center" />

                <Image Grid.Row="4"
                    Source="dotnet_bot.png"
                    SemanticProperties.Description="Cute dotnet bot waving hi to you!"
                    WidthRequest="300"
                    HorizontalOptions="Center" />

            </Grid>
        </StackLayout>
    </ScrollView>
</ContentPage>

使用 WinUI 的方式來執行

切換到 MauiApp1.WinUI 專案為預設起始專案
執行這個 WinUI 專案，將會看到底下的執行結果

執行 maui-check 的執行結果

      _   _   _____   _____     __  __      _      _   _   ___
     | \ | | | ____| |_   _|   |  \/  |    / \    | | | | |_ _|
     |  \| | |  _|     | |     | |\/| |   / _ \   | | | |  | |
  _  | |\  | | |___    | |     | |  | |  / ___ \  | |_| |  | |
 (_) |_| \_| |_____|   |_|     |_|  |_| /_/   \_\  \___/  |___|

? .NET MAUI Check v0.5.6.0 ?
────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
This tool will attempt to evaluate your .NET MAUI development environment.
If problems are detected, this tool may offer the option to try and fix them for you, or suggest a way to fix them
yourself.

Thanks for choosing .NET MAUI!
────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
? Synchronizing configuration... ok
? Scheduling appointments... ok

? OpenJDK 11.0 Checkup...
  – 1.8.0-25 (C:\Program Files\Android\Jdk\microsoft_dist_openjdk_1.8.0.25)

────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
? Recommendation: Install OpenJDK11
────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────

! Attempt to fix? [y/n] (y): y
? Attempting to fix: OpenJDK 11.0
  Installing Download and Install Microsoft OpenJDK 11...
  Installed Download and Install Microsoft OpenJDK 11.
Fix applied.  Checking again...

? OpenJDK 11.0 Checkup...
  – 11.0.10 (C:\Program Files\Microsoft\jdk-11.0.10.9-hotspot\bin\..)
  – Set Environemnt Variable: JAVA_HOME=C:\Program Files\Microsoft\jdk-11.0.10.9-hotspot
  – 1.8.0-25 (C:\Program Files\Android\Jdk\microsoft_dist_openjdk_1.8.0.25)

? Visual Studio 16.10.0 Checkup...
  – 16.11.0-pre.2.0 - C:\Program Files (x86)\Microsoft Visual Studio\2019\Preview

? Android SDK Checkup...
  × emulator (30.4.5) missing.
  – build-tools;30.0.2 (30.0.2)
  – platforms;android-30 (3)
  × system-images;android-30;google_apis;x86 (9) missing.
  – platform-tools (30.0.4)

────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
? Recommendation: Install or Update Android SDK packages
Your Android SDK has missing or outdated packages.
You can use the Android SDK Manager to install / update them.
For more information see: https://aka.ms/dotnet-androidsdk-help
────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────

! Attempt to fix? [y/n] (y): y
? Attempting to fix: Android SDK
  – Downloading https://dl.google.com/android/repository/sys-img/google_apis/x86-30_r09.zip ...
  – Downloading https://dl.google.com/android/repository/3534162-studio.sdk-patcher.zip ...
  – Downloading https://dl.google.com/android/repository/emulator-windows_x64-7324830.zip ...
  – Downloaded 10% of 3534162-studio.sdk-patcher.zip ...
  – Downloaded 20% of 3534162-studio.sdk-patcher.zip ...
  – Downloaded 30% of 3534162-studio.sdk-patcher.zip ...
  – Downloaded 40% of 3534162-studio.sdk-patcher.zip ...
  – Downloaded 50% of 3534162-studio.sdk-patcher.zip ...
  – Downloaded 61% of 3534162-studio.sdk-patcher.zip ...
  – Downloaded 72% of 3534162-studio.sdk-patcher.zip ...
  – Downloaded 82% of 3534162-studio.sdk-patcher.zip ...
  – Downloaded 93% of 3534162-studio.sdk-patcher.zip ...
  – Wrote 'https://dl.google.com/android/repository/3534162-studio.sdk-patcher.zip' to
'C:\Users\vulcan\AppData\Local\Temp\tmp9F13.tmp'.
  – Downloaded 10% of emulator-windows_x64-7324830.zip ...
  – Downloaded 20% of emulator-windows_x64-7324830.zip ...
  – Downloaded 30% of emulator-windows_x64-7324830.zip ...
  – Downloaded 40% of emulator-windows_x64-7324830.zip ...
  – Downloaded 50% of emulator-windows_x64-7324830.zip ...
  – Downloaded 10% of x86-30_r09.zip ...
  – Downloaded 60% of emulator-windows_x64-7324830.zip ...
  – Downloaded 70% of emulator-windows_x64-7324830.zip ...
  – Downloaded 80% of emulator-windows_x64-7324830.zip ...
  – Downloaded 90% of emulator-windows_x64-7324830.zip ...
  – Wrote 'https://dl.google.com/android/repository/emulator-windows_x64-7324830.zip' to
'C:\Users\vulcan\AppData\Local\Temp\tmp9F12.tmp'.
  – Downloaded 20% of x86-30_r09.zip ...
  – Downloaded 30% of x86-30_r09.zip ...
  – Downloaded 40% of x86-30_r09.zip ...
  – Downloaded 50% of x86-30_r09.zip ...
  – Downloaded 60% of x86-30_r09.zip ...
  – Downloaded 70% of x86-30_r09.zip ...
  – Downloaded 80% of x86-30_r09.zip ...
  – Downloaded 90% of x86-30_r09.zip ...
  – Wrote 'https://dl.google.com/android/repository/sys-img/google_apis/x86-30_r09.zip' to
'C:\Users\vulcan\AppData\Local\Temp\tmp9F14.tmp'.
Fix applied.  Checking again...

? Android SDK Checkup...
  – emulator (30.6.5)
  – build-tools;30.0.2 (30.0.2)
  – platforms;android-30 (3)
  – system-images;android-30;google_apis;x86 (9)
  – platform-tools (30.0.4)

? Android Emulator Checkup...
  ! Unable to find any Android Emulators.  You can use Visual Studio to create one if necessary:
https://docs.microsoft.com/xamarin/android/get-started/installation/android-emulator/device-manager

? .NET SDK Checkup...
  – 5.0.400-preview.21277.10 - C:\Program Files\dotnet\sdk\5.0.400-preview.21277.10
  – 6.0.100-preview.5.21302.13 - C:\Program Files\dotnet\sdk\6.0.100-preview.5.21302.13

? .NET SDK - Workload Deduplication Checkup...

? .NET SDK - EnableWorkloadResolver.sentinel Checkup...
  – C:\Program Files (x86)\Microsoft Visual
Studio\2019\Preview\MSBuild\Current\Bin\SdkResolvers\Microsoft.DotNet.MSBuildSdkResolver\EnableWorkloadResolver.sentinel
exists.

? .NET SDK - Workloads (6.0.100-preview.5.21302.13) Checkup...
  × microsoft-android-sdk-full (Microsoft.NET.Sdk.Android.Manifest-6.0.100 : 30.0.100-preview.5.28) not installed.
  × microsoft-ios-sdk-full (Microsoft.NET.Sdk.iOS.Manifest-6.0.100 : 14.5.100-preview.5.894) not installed.
  × microsoft-maccatalyst-sdk-full (Microsoft.NET.Sdk.MacCatalyst.Manifest-6.0.100 : 14.5.100-preview.5.894) not
installed.
  × microsoft-tvos-sdk-full (Microsoft.NET.Sdk.tvOS.Manifest-6.0.100 : 14.5.100-preview.5.894) not installed.
  × microsoft-macos-sdk-full (Microsoft.NET.Sdk.macOS.Manifest-6.0.100 : 11.3.100-preview.5.894) not installed.

────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
? Recommendation: Install Missing SDK Workloads
────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────

! Attempt to fix? [y/n] (y): y
? Attempting to fix: .NET SDK - Workloads (6.0.100-preview.5.21302.13)
  Installing Workload: microsoft-android-sdk-full...
  Installed Workload: microsoft-android-sdk-full.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Workloads (6.0.100-preview.5.21302.13)
  Installing Workload: microsoft-ios-sdk-full...
  Installed Workload: microsoft-ios-sdk-full.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Workloads (6.0.100-preview.5.21302.13)
  Installing Workload: microsoft-maccatalyst-sdk-full...
  Installed Workload: microsoft-maccatalyst-sdk-full.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Workloads (6.0.100-preview.5.21302.13)
  Installing Workload: microsoft-tvos-sdk-full...
  Installed Workload: microsoft-tvos-sdk-full.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Workloads (6.0.100-preview.5.21302.13)
  Installing Workload: microsoft-macos-sdk-full...
  Installed Workload: microsoft-macos-sdk-full.
Fix applied.  Checking again...

? .NET SDK - Workloads (6.0.100-preview.5.21302.13) Checkup...
  – microsoft-android-sdk-full (Microsoft.NET.Sdk.Android.Manifest-6.0.100 : 30.0.100-preview.5.28) installed.
  – microsoft-ios-sdk-full (Microsoft.NET.Sdk.iOS.Manifest-6.0.100 : 14.5.100-preview.5.894) installed.
  – microsoft-maccatalyst-sdk-full (Microsoft.NET.Sdk.MacCatalyst.Manifest-6.0.100 : 14.5.100-preview.5.894) installed.
  – microsoft-tvos-sdk-full (Microsoft.NET.Sdk.tvOS.Manifest-6.0.100 : 14.5.100-preview.5.894) installed.
  – microsoft-macos-sdk-full (Microsoft.NET.Sdk.macOS.Manifest-6.0.100 : 11.3.100-preview.5.894) installed.

? .NET SDK - Packs (6.0.100-preview.5.21302.13) Checkup...
  ! Microsoft.Maui.Templates (6.0.100-preview.5.794) not installed.
  ! Microsoft.Android.Sdk (30.0.100-preview.5.28) not installed.
  ! Microsoft.Android.Sdk.BundleTool (30.0.100-preview.5.28) not installed.
  ! Microsoft.Android.Ref (30.0.100-preview.5.28) not installed.
  ! Microsoft.Android.Templates (30.0.100-preview.5.28) not installed.
  ! Microsoft.iOS.Sdk (14.5.100-preview.5.894) not installed.
  ! Microsoft.iOS.Windows.Sdk (14.5.100-preview.5.894) not installed.
  ! Microsoft.iOS.Ref (14.5.100-preview.5.894) not installed.
  ! Microsoft.iOS.Templates (14.5.100-preview.5.894) not installed.
  ! Microsoft.MacCatalyst.Sdk (14.5.100-preview.5.894) not installed.
  ! Microsoft.MacCatalyst.Ref (14.5.100-preview.5.894) not installed.
  ! Microsoft.MacCatalyst.Templates (14.5.100-preview.5.894) not installed.
  ! Microsoft.tvOS.Sdk (14.5.100-preview.5.894) not installed.
  ! Microsoft.tvOS.Ref (14.5.100-preview.5.894) not installed.
  ! Microsoft.tvOS.Templates (14.5.100-preview.5.894) not installed.
  ! Microsoft.macOS.Sdk (11.3.100-preview.5.894) not installed.
  ! Microsoft.macOS.Ref (11.3.100-preview.5.894) not installed.
  ! Microsoft.macOS.Templates (11.3.100-preview.5.894) not installed.

────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
? Recommendation: Install Missing SDK Packs
────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────

! Attempt to fix? [y/n] (y): y
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.Maui.Templates...
  Installed Pack: Microsoft.Maui.Templates.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.Android.Sdk...
  Installed Pack: Microsoft.Android.Sdk.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.Android.Sdk.BundleTool...
  Installed Pack: Microsoft.Android.Sdk.BundleTool.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.Android.Ref...
  Installed Pack: Microsoft.Android.Ref.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.Android.Templates...
  Installed Pack: Microsoft.Android.Templates.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.iOS.Sdk...
  Installed Pack: Microsoft.iOS.Sdk.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.iOS.Windows.Sdk...
  Installed Pack: Microsoft.iOS.Windows.Sdk.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.iOS.Ref...
  Installed Pack: Microsoft.iOS.Ref.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.iOS.Templates...
  Installed Pack: Microsoft.iOS.Templates.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.MacCatalyst.Sdk...
  Installed Pack: Microsoft.MacCatalyst.Sdk.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.MacCatalyst.Ref...
  Installed Pack: Microsoft.MacCatalyst.Ref.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.MacCatalyst.Templates...
  Installed Pack: Microsoft.MacCatalyst.Templates.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.tvOS.Sdk...
  Installed Pack: Microsoft.tvOS.Sdk.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.tvOS.Ref...
  Installed Pack: Microsoft.tvOS.Ref.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.tvOS.Templates...
  Installed Pack: Microsoft.tvOS.Templates.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.macOS.Sdk...
  Installed Pack: Microsoft.macOS.Sdk.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.macOS.Ref...
  Installed Pack: Microsoft.macOS.Ref.
Fix applied.  Checking again...
? Attempting to fix: .NET SDK - Packs (6.0.100-preview.5.21302.13)
  Installing Pack: Microsoft.macOS.Templates...
  Installed Pack: Microsoft.macOS.Templates.
Fix applied.  Checking again...

? .NET SDK - Packs (6.0.100-preview.5.21302.13) Checkup...
  – Microsoft.Maui.Templates (6.0.100-preview.5.794) installed.
  – Microsoft.Android.Sdk (30.0.100-preview.5.28) installed.
  – Microsoft.Android.Sdk.BundleTool (30.0.100-preview.5.28) installed.
  – Microsoft.Android.Ref (30.0.100-preview.5.28) installed.
  – Microsoft.Android.Templates (30.0.100-preview.5.28) installed.
  – Microsoft.iOS.Sdk (14.5.100-preview.5.894) installed.
  – Microsoft.iOS.Windows.Sdk (14.5.100-preview.5.894) installed.
  – Microsoft.iOS.Ref (14.5.100-preview.5.894) installed.
  – Microsoft.iOS.Templates (14.5.100-preview.5.894) installed.
  – Microsoft.MacCatalyst.Sdk (14.5.100-preview.5.894) installed.
  – Microsoft.MacCatalyst.Ref (14.5.100-preview.5.894) installed.
  – Microsoft.MacCatalyst.Templates (14.5.100-preview.5.894) installed.
  – Microsoft.tvOS.Sdk (14.5.100-preview.5.894) installed.
  – Microsoft.tvOS.Ref (14.5.100-preview.5.894) installed.
  – Microsoft.tvOS.Templates (14.5.100-preview.5.894) installed.
  – Microsoft.macOS.Sdk (11.3.100-preview.5.894) installed.
  – Microsoft.macOS.Ref (11.3.100-preview.5.894) installed.
  – Microsoft.macOS.Templates (11.3.100-preview.5.894) installed.
────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────



! Things look almost great, except some pesky warning(s) which may or may not be a problem, but at least if they are,
you'll know where to start searching!

Press enter to exit...

Announcing .NET 6 Preview 5

Announcing .NET MAUI Preview 5

Download .NET 6.0

.NET Multi-platform App UI documentation

訂閱：文章 (Atom)

2021年7月26日 星期一

ASP.NET Core 應該具備知識 - 日誌記錄

ASP.NET Core 應該具備知識 - 日誌記錄

ASP.NET Core 應該具備知識

建立一個 ASP.NET Core MVC 專案

建立服務類別與介面

設計新的 API 控制器

執行這個專案

修正那些日誌資訊可以看得到

2021年7月24日 星期六

.NET 6 Preview 5 MAUI App 體驗使用經驗 1

.NET 6 Preview 5 MAUI App 體驗使用經驗 1

安裝與檢查 Maui 是否完整

建立 Maui 的專案

使用 WinUI 的方式來執行

執行 maui-check 的執行結果

2021年7月26日星期一

2021年7月24日星期六