Programming on Martin‘s Physics Club

I Built a Simple Optical Simulation Tool

Fri, 28 Aug 2026 03:39:45 +0000

LightDraw began with a simple goal: make optics easier to teach, explore, and understand. I built this lightweight 2D simulator around real classroom needs, then extended it to visualize electrostatic and magnetostatic fields alongside optics.

Built with .NET, Avalonia, and SkiaSharp, LightDraw makes abstract physics easier to see and explore.

Try LightDraw

Best experience: Download the desktop client from the Microsoft Store.
Quick preview: Run LightDraw in your browser.
Source code: Explore LightDraw on GitHub.

About the online version: It runs in Avalonia’s WebAssembly (WASM) mode, where performance is significantly limited. Please use it for an initial evaluation or when you urgently need access. For regular use and the best experience, choose the desktop client.

I choose WPF as my first Windows-based App Framework in 2025

Thu, 20 Mar 2025 14:04:23 +0000

Windows Presentation Foundation (WPF) was born in November 21, 2006. At that time i was a “child” who only know use VB.NET to creat old fashion GUI Application. At that time I prefer find a app than creat one by my-996-self.Not crazy about coding.

The Beginning

The meaningful time is about 2016.Microsoft released Universal Windows Platform(UWP) Framework,coder can code one sample to publish in Windows 10 destop/Windows 10 mobile/XBoxOne. I was so attracted to learn UWP by Channel 9’s video.I learned how to use XAML to design an interface/space and studied .NET syntax. From compiling a simple calculator to run on my Windows 10 PC and my Lumia phone, to flashing Windows 10 IoT on a Raspberry Pi and running my self-built local network media server—those were wonderful times.Back then, in China, platforms like NetEase Cloud Music were among the first to support the UWP framework, bringing countless surprises to users. Unfortunately, we, the 1%, still lost in market.

Troubleshooting Property Update Issues in WPF DataGridCheckBoxColumn Bindings

Tue, 03 Sep 2024 10:46:36 +0000

Why does the CheckBox state change in WPF DataGridCheckBoxColumn not automatically update the bound property?

Situation：

My code has correctly implemented the binding relationship using the MVVM library, but I am unable to filter data using the checkbox in the DataGrid.

//model
public class SpectralPeakDataItem
{
 public bool IsUserFor { get; set; }

 public double Wavelength { get; set; }

 public int PixelPosition { get; set; }

 public double InstensityPercentage { get; set; }
}

//ViewModel
[ObservableProperty]
private ObservableCollection<SpectralPeakDataItem> _mercuryArgonSpectralPeakDataItems = [];

<ui:DataGrid
 Grid.Column="0"
 Margin="5"
 AutoGenerateColumns="False"
 ItemsSource="{Binding MercuryArgonSpectralPeakDataItems, Mode=TwoWay}">
 <DataGrid.Columns>
 <DataGridCheckBoxColumn Binding="{Binding IsUserFor, Mode=TwoWay}" Header="IsUserFor" />
 <DataGridTextColumn Binding="{Binding Wavelength, Mode=TwoWay}" Header="Wavelength" />
 <DataGridTextColumn Binding="{Binding PixelPosition, Mode=TwoWay}" Header="PixelPosition" />
 <DataGridTextColumn Binding="{Binding InstensityPercentage, Mode=TwoWay}" Header="Percentage" />
 </DataGrid.Columns>
</ui:DataGrid>

However, in the usual event-driven code design, it works fine.So, I think this is an issue with MVVM’s data binding, as it doesn’t seem to achieve data synchronization.So next, I discovered that:In a WPF DataGridCheckBoxColumn, the reason why changes in the CheckBox’s checked state do not automatically trigger property updates is primarily because the DataGridCheckBoxColumn uses a binding context that may not directly reflect changes in the CheckBox state. This often involves the following issues:

使用.Net搭配EF Core记录你城市的天气

Fri, 08 Dec 2023 21:09:08 +0000

项目简述

这个项目是我在学习.Net Core编程的时候用到的简单例子，整体就是通过Get请求获取某地区的天气信息，经过json反向序列化后写入到数据库中存储起来。通过.net6的EntityFramework我们可以很优雅地为这个小项目进行CodeFirst的设计（沿用杨中科老师的一个观点：“关系型数据库对程序员来讲只是一个存放数据模型的媒介，理想状态下程序员不用关心数据库的操作。”）这个项目将会用EntityFramework进行数据库的CURD操作，任务目标：