Category: "Announcements [B]"
Charting Tool for WPF
Recently, we have been buying a WPF application. That is a budget management application. That is talking about money. Of course, charts need to play an important role. I have looked into various charting libraries. Some of them need to be paid. However, one is entirely open and completed under an MIT license. That does not require access to their AP. Charting is done locally. It supports everything, such as MAUI, Wpf, Winforms, and ASP.net. In addition, the documentation is alright. That is Live Charts.
Solution for WPF Combo Box binding with a object type value
I found that the ComboBox WPF binding in WPF does not work correctly if the binding value is of an object type. Even when I set SelectedValuePath="Id", the binding fails to set the value. When a different value in the ComboBox is selected, the new selected value should be set in the ViewModel too. However, this does not happen this way.
I got a solution for this issue, which is to set the SelectedValue to be the CategoryId:
<ComboBox Grid.Row="3" Grid.Column="1" ItemsSource="{Binding CategoryList}" DisplayMemberPath="Name" SelectedItem="CategoryId" SelectedValue="{Binding CategoryId, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" SelectedValuePath="Id" Margin="5"/>
Inside the ViewModel:
public int CategoryId { get => _selectedCategoryId; set { if (_selectedCategoryId != value) { //_selectedCategory = value; _item.CategoryId = value; _item.Category = CategoryList.FirstOrDefault(c => c.Id == value); OnPropertyChanged(); } } }
Then it will work!
ChatGPT to be my code generator
As a developer, you're constantly writing code. Creating a new model class, implementing a repository, or configuring a database context are all essential steps in building a software application. However, these tasks can be time-consuming and repetitive, taking away from the time you could be spending on more critical tasks.
Fortunately, code generation offers a remedy. You may automate the writing of code by using code generators, which will save you time and lower the possibility of mistakes. And what's even more impressive is how accurately current language models like GPT-3 can generate code. GPT-4 is even better.
For instance, you have to construct a brand-new Author model class, a realted repository, and a database context. You could give the ChatGPT with some fundamental information about the entity (such the names of the properties and the data types), and the ChatGPT would handle the rest.
Using ChatGPT, a large language model based on GPT-3, we can generate code for the Author entity in just a few simple steps:
- Provide the essential details for the Author class, such as the property names and data types:
class Author
{
public int Id { get; set; }
public string Name { get; set; }
public string Email { get; set; }
public string Phone { get; set; }
}
- Ask ChatGPT to generate the repository interface and Implementation for the Author class:
// Interface for the repository
interface IAuthorRepository
{
Task<Author> GetAuthorById(int id);
Task<IEnumerable<Author>> GetAllAuthors();
Task AddAuthor(Author author);
Task UpdateAuthor(Author author);
Task DeleteAuthor(Author author);
}
//Implementation for the repository
class AuthorRepository : IAuthorRepository
{
private readonly MyDbContext _dbContext;
public AuthorRepository(MyDbContext dbContext)
{
_dbContext = dbContext;
}
public async Task<Author> GetAuthorById(int id)
{
return await _dbContext.Authors.FindAsync(id);
}
public async Task<IEnumerable<Author>> GetAllAuthors()
{
return await _dbContext.Authors.ToListAsync();
}
public async Task AddAuthor(Author author)
{
await _dbContext.Authors.AddAsync(author);
await _dbContext.SaveChangesAsync();
}
public async Task UpdateAuthor(Author author)
{
_dbContext.Entry(author).State = EntityState.Modified;
await _dbContext.SaveChangesAsync();
}
public async Task DeleteAuthor(Author author)
{
_dbContext.Authors.Remove(author);
await _dbContext.SaveChangesAsync();
}
}
- Ask ChatGPT to generate the database context for the Author class:
<pre><code>class MyDbContext : DbContext
{
public MyDbContext(DbContextOptions<MyDbContext> options)
: base(options)
{
}
public DbSet<Author> Authors { get; set; }
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<Author>()
.HasKey(a => a.Id);
modelBuilder.Entity<Author>()
.Property(a => a.Name)
.IsRequired();
modelBuilder.Entity<Author>()
.Property(a => a.Email)
.IsRequired();
modelBuilder.Entity<Author>()
.Property(a => a.Phone)
.IsRequired();
}
}
Additionally, ChatGPT can create code with astounding precision because it is based on a substantial language model. This lowers the possibility of errors in your application since the generated code is more likely to be accurate.
Overall, developers can benefit greatly from employing code generation tools like ChatGPT. Developers may concentrate their time and effort on more important duties, including planning and creating new features for their apps, by automating repetitive and time-consuming operations.
Microservices need to make it right
Last month, I went to Brisbane .Net User Group. One of the talks was about Microservice. The key point is we need to make the Microservice right, rather than pretending to have Microservice. I totally agree with that. Because the main key part of Microservice, in my understanding, is self-contained. The microservice won't need to require any external resources and the tasks will be carried out by a microservice is very small. Thus, that is very hard for architects.
HDMI and DVI cannot convert to the Display Port
I felt I am very silly. I got a work laptop, personal business PC and Mac Mini. Then my monitor got three sockets, two HDMI ports and a Display Port. I used two HDMI ports for my work laptop and personal business PC. So there is only a display port for my Mac Mini, but my Mac Mini got a HDMI port out. I do not want to waste it. At the end, I bought a HDMI to display port cable. I found that is not working, because the cable is only support only one direction, that is from Display Port Out (Computer) to the monitor with HDMI. We cannot do it another way. Then I found a forum post suggested to have a Display Port to DVI converter, then use the HDMI to DVI cable, to connect your computer to the adapter. Then I found it won't work too. The Display port to DVI adapter is one direction only too. That is to connect the display port out in the computer side. Then I finally admited I cannot convert HDMI to display port montior