ValueObject as Entity ID, EntityTypeConfiguration Sample

markdown 問題：https://stackoverflow.com/questions/53328201/ef-core-non-primitive-type-value-object-as-primary-key 參考來源：https://github.com/dotnet/efcore/issues/13669 ``` public class User { public UserId Id { get; set; } public Credentials Credentials { get; set; } } public class UserId { private UserId() { } private UserId(long id) { Id = id; } public long Id { get; private set; } public static implicit operator long(UserId beaconId) { return beaconId.Id; } public static implicit operator UserId(long id) { return new UserId(id); } public override bool Equals(object obj) { if (obj == null) { return false; } var userId = (UserId) obj; return this.Id == userId.Id; } public override int GetHashCode() { return Id.GetHashCode(); } } public class TestDbContext: DbContext { public TestDbContext(DbContextOptions options): base(options) { } public DbSet Users { get; set; } protected override void OnModelCreating(ModelBuilder modelBuilder) { var userModelBuilder = modelBuilder.Entity(); userModelBuilder.Property(x => x.Id).HasConversion(x => x.Id, value => new UserId(value)).HasColumnName("Id").IsRequired(); userModelBuilder.OwnsOne(x => x.Credentials, c => { c.Property(x => x.Email); c.Property(x => x.Password); }); } } ```

dotnet core get k8s self POD name

markdown k8s 中的 dotnet core 應用取得 POD name 三種方式取得的結果相同 ``` class Program { static async Task Main(string[] args) { Console.WriteLine("MachineName:"+Environment.MachineName); Console.WriteLine("HostName:"+ System.Net.Dns.GetHostName()); Console.WriteLine("ENV K8S_POD_NAME:"+Environment.GetEnvironmentVariable("K8S_POD_NAME")); await Task.Run(() =〉 Thread.Sleep(Timeout.Infinite)); } } ``` result on dotnet 3.1.11-alpine3.12 ``` MachineName:mqsend-7d9579cc47-kld6v HostName:mqsend-7d9579cc47-kld6v ENV K8S_POD_NAME:mqsend-7d9579cc47-kld6v ``` ENV需要在deployment時額外加入參考 ``` spec: containers: - env: - name: K8S_POD_NAME valueFrom: fieldRef: fieldPath: metadata.name ``` ref - https://kubernetes.io/docs/tasks/inject-data-application/environment-variable-expose-pod-information/#use-container-fields-as-values-for-environment-variablesƒ

Adding Git-Bash to the new Windows Terminal

markdown 在 Terminal 按下 `ctrl` + `,`，會開啟 `settings.json` ``` { "$schema": "https://aka.ms/terminal-profiles-schema", "defaultProfile": "{00000000-0000-0000-ba54-000000000001}", "profiles": { "defaults": { // Put settings here that you want to apply to all profiles }, "list": [ // put one of the configuration below right here ] } } ``` 在 list 的區段中加入，依據正確git安裝路徑取消`commandline`和`icon`的註解 ``` { "guid": "{00000000-0000-0000-ba54-000000000002}", //"commandline": "%PROGRAMFILES%/git/usr/bin/bash.exe -i -l", //"commandline": "%USERPROFILE%/AppData/Local/Programs/Git/git-bash.exe -l -i", "commandline": "%USERPROFILE%/AppData/Local/Programs/Git/bin/sh.exe --login", //"commandline": "%USERPROFILE%/AppData/Local/Programs/Git/bin/bash.exe -l -i", //"commandline": "%USERPROFILE%/scoop/apps/git/current/usr/bin/bash.exe -l -i", //"icon": "%PROGRAMFILES%/Git/mingw64/share/git/git-for-windows.ico", "icon": "%USERPROFILE%/AppData/Local/Programs/Git/mingw64/share/git/git-for-windows.ico", // "icon": "%USERPROFILE%/apps/git/current/usr/share/git/git-for-windows.ico", "name": "Bash", "startingDirectory": "%USERPROFILE%" } ``` # Reference # [Adding Git-Bash to the new Windows Terminal](https://stackoverflow.com/questions/56839307/adding-git-bash-to-the-new-windows-terminal)

新的 Windows Terminal 視窗分割

markdown # New Windows Terminal Windows 終端機是一種現代化、快速、高效、功能強大且具生產力的終端應用程式，適合命令列工具和 Shell (像是命令提示字元、PowerShell 和 WSL) 的使用者。主要功能包括多個索引標籤、窗格、Unicode 和 UTF-8 字元支援、GPU 加速的文字呈現引擎，以及自訂主題、樣式和設定。 可以直接在 Window 10 的 Microsoft Store 下載。 * 下載安裝[Windows Terminal](https://www.microsoft.com/zh-tw/p/windows-terminal/9n0dx20hk701?activetab=pivot:overviewtab) * [Source Code](https://github.com/microsoft/terminal) # 視窗分割 * 自動分割視窗：Alt + Shift + D * 建立一個新的水平分割：Alt + Shift + -(英文鍵上排的減號) * 建立一個新的垂直分割：Alt + Shift + +(英文鍵上排的加號) * 移動遊標至其它視窗：Alt + Left, Alt + Right, Alt + Up, Alt + Down * 調整遊標所在視窗的大小：Alt + Shift + Left, Alt + Shift + Right, Alt + Shift + Up, Alt + Shift + Down ## 或是 Ctrl + Shift + P 開啟輸入命令名稱的快捷輸入框 1. 選擇 Split Pane... 2. 選擇要開啟的Shell環境「Azure Cloud Shell、Windows PowerShell、命令提示字元、或是自己安裝的 WSL 子系統(Linux)」 3. 選擇要分割的視窗方向，「自動，水平、垂直」 * 自動：依視窗大小自動做水平或垂直分割 * 水平：分割成上和下 * 垂直：分割成左和右 # 關閉分割 * 將遊標所在的視窗關閉：Ctrl + Shift + W # 透過指令啟動一個視窗，裡面已經分割成三個 ``` wt -p "Command Prompt" `; split-pane -p "Windows PowerShell" `; split-pane -H wsl.exe ``` # 參考 * [Using command-line arguments for Windows Terminal](https://github.com/MicrosoftDocs/terminal/blob/master/TerminalDocs/command-line-arguments.md) * [The New Windows Terminal Is Ready; Here’s Why It’s Amazing](https://www.howtogeek.com/673729/heres-why-the-new-windows-10-terminal-is-amazing/) - Chris Hoffman, May 19, 2020

查 Windows Port 被哪一個程式使用

markdown 查 Windows Port 被哪一個程式使用 ``` netstat -ano | findstr "0.0.0.0:443" ``` ``` tasklist|findstr "4836" ```

VMware Workstation and Hyper-V are not compatible.

markdown 當 Windows 作業系統啟用 Hyper-V 時，會無法使用 VMware Workstation。所以會出現以下的訊息 > VMware Workstation and Hyper-V are not compatible. Remove the Hyper-V role from the system before running VMware Workstation. Disable Hyper-V 1. Open cmd in admin mode 2. bcdedit /set hypervisorlaunchtype off 3. restart!? To enable the Hyper-V role again use the following command: 1. Open cmd in admin mode 2. bcdedit /set hypervisorlaunchtype auto 3. restart!?

Jupyter Notebooks 使用 .NET C# 進行交互開發

markdown # 安裝步驟 * 安裝好 .NET Core 3.1 SDK * 安裝好 Python 3 (預設已裝 pip) * 安裝 Jupyter ``` pip install jupyter ``` * 確認 Jupyter 安裝是否正確 ``` jupyter kernelspec list ``` * 安裝 .NET Interactive 方法1. ``` dotnet tool install -g --add-source "https://dotnet.myget.org/F/dotnet-try/api/v3/index.json" Microsoft.dotnet-interactive dotnet interactive jupyter install ``` 方法2. >請注意：如果此前已經安裝了dotnet try全局工具，需要先卸載舊版本的軟體再安裝。 ``` dotnet tool install --global dotnet-try ``` 在Anaconda提示符下通過命令安裝.NET內核： ``` dotnet try jupyter install ``` * 再次使用 `jupyter kernelspec list` 命令檢查安裝好的 .NET 版本 Jupyter 支援 顯示結果 ``` .net-csharp ~\jupyter\kernels\.net-csharp .net-fsharp ~\jupyter\kernels\.net-fsharp .net-powershell ~\jupyter\kernels\.net-powershell python3 ~\jupyter\kernels\python3 ``` # 使用 Jupyter Notebooks ``` mkdir yourapp cd yourapp jupyter notebook ``` 然後就可以在瀏覽器使用 jupyter 了。 開啟 jupyter 的右側可以新增 「NET(C#)、NET (F#)、NET (PowerShell)、Python 3」 ## 功能介紹 ### HTML解析和輸出 ``` display(HTML("Hello, alger!")); ``` ### 使用 JavaScript ``` Javascript(@"alert(""Hello, Alger!"")"); ``` ### 使用 pocketView ``` display( span( img[src:"https://www.google.com/favicon.ico",style:"height:4.5em"], a[href: @"http://www.google.com", target: "blank", style: "color:green"](b("諸事不宜")) ) ); ``` ### 使用 markdown ``` %%markdown * 一 * 二 * 三 | one | two | |-----|-----| | 一 | 二 | | 臺 | 貮 | ``` ### 類庫導入 可以支持對 C# 類庫的導入，使用 #r語法，從 nuget 導入程式庫 ``` #r "nuget:[,]" ``` 例如： ``` #r "nuget:System.Reactive.Linq, 4.1.5" ``` 導入程式庫時需要等待。 ### 對像格式化 情況下，.NET Notebook使用戶能夠以表格式顯示有關對象的有用信息。比如對一個Ienumerable對象display顯示如下： ``` display(new[]{"hello", "world"}); Enumerable.Range(1,5); ``` ### Formatter API ### 繪圖 .net notebook的繪圖功能都使用XPlot.Plotly 可視化包。 ``` //Install XPlot package #r "nuget:XPlot.Plotly" //Plotting functionalities using XPlot.Plotly; var chart = Chart.Plot( new Graph.Scattergl() { x = housingData["logitude"], y = housingData["latitude"], mode = "markers", marker = new Graph.Marker() { color = housingData["median_house_value"], colorscale = "Jet" } } ); chart.Width = 600; chart.Height = 600; display(chart); ``` NET (F#)、NET (PowerShell)、Python 3」