C#•5mo ago

How to update UI easily on variable change in MAUI

I need to update a lot of text and it is desirable to link the update to a change in variables, I tried to use binding, but as I understood it, it does not suit me

25 Replies

sibber•5mo ago

why doesnt it suit you? its the standard way of doing it

Sergey5588OP•5mo ago

I Googled and did not understand how to do this, as I understood, you can only bind two properties of different objects

sibber•5mo ago

idk what you mean different objects but you can bind any dependency property which is almost anything you need to bind i recommend reading up about the basics of mvvm first and taking this slower

sibber•5mo ago

https://learn.microsoft.com/en-us/dotnet/maui/xaml/fundamentals/mvvm?view=net-maui-8.0

Data binding and MVVM - .NET MAUI

The Model-View-ViewModel (MVVM) pattern enforces a separation between three software layers — the XAML user interface, called the view, the underlying data, called the model, and an intermediary between the view and the model, called the viewmodel.

Sergey5588OP•5mo ago

I will look

Sergey5588OP•5mo ago

https://youtu.be/sxSk4sOszzs?feature=shared i found this but i need a static class and static vars

Devs School

YouTube

NET MAUI: How to bind a static property to a xaml control?

Get the full .NET MAUI Course: https://courses.devs.school/courses/net-maui In this video, I am going to show you a way to use a static property on a control in your .NET MAUI projects.

sibber•5mo ago

you don't like i said take this slow and learn everything from the beginning did you read the article i sent? do you understand what INotifyPropertyChanged is?

Sergey5588OP•5mo ago

a bit yes

sibber•5mo ago

what is it?

Sergey5588OP•5mo ago

it notifies it is used to make the user interface understand when it is being updated

sibber•5mo ago

yeah it sends a notification with the name of the property that was changed notification in the form of an event and things like the ui can subscribe to the event and it can know what properties in a class that implements INPC change and when so all you need to do is bind to a property that sends a notification when its changed thats all there is to it

Sergey5588OP•5mo ago

can you give an example of code

sibber•5mo ago

there are lots of examples here

Sergey5588OP•5mo ago

i see but how to use static vars like i have a class with game logic and i have a static vars to use them anywhere

sibber•5mo ago

you dont you make an instance of the class representing the game state

Sergey5588OP•5mo ago

nooo i dont whant to and how do i make it

sibber•5mo ago

you make it not static and create an instance then you can implement INPC and bind

Sergey5588OP•5mo ago

but how do i make it unique and accessable from other classes

sibber•5mo ago

you pass the instance you created to the other classes usually when constructing them but since you mentioned this is a game, then a singleton might be fine or so ive heard about game dev

Sergey5588OP•5mo ago

what can you give me some articles or something

sibber•5mo ago

there aren't any official docs its pretty easy to look up

Sergey5588OP•5mo ago

i found only dependency injection oh i found yeah i made a singleton

using PropertyChanged;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;

namespace IdleLight
{
    [AddINotifyPropertyChangedInterface]
    public partial class MainGame
    {
        

        private static MainGame _instance;
        private MainGame() { }

        public static MainGame GetInstance()
        {
            if(_instance == null)
            {
                _instance = new MainGame();
            }
            
            
            return _instance;
            
        }






        public int light { get; set; } = 0;
        public int lightPerTick { get; set; } = 1;

        
        
    }
    

 
    
}

using PropertyChanged;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;

namespace IdleLight
{
    [AddINotifyPropertyChangedInterface]
    public partial class MainGame
    {
        

        private static MainGame _instance;
        private MainGame() { }

        public static MainGame GetInstance()
        {
            if(_instance == null)
            {
                _instance = new MainGame();
            }
            
            
            return _instance;
            
        }






        public int light { get; set; } = 0;
        public int lightPerTick { get; set; } = 1;

        
        
    }
    

 
    
}

sibber•5mo ago

do you know what an interface is?

Sergey5588OP•4mo ago

i made it like check this private void BindText() {
Binding bind = new Binding(); bind.Source = MainGame.GetInstance(); bind.Path = "light"; lightText.SetBinding(Label.TextProperty, bind); } and its working ye

sibber•4mo ago

i really recommend learning the fundementals of c# on its own and then learning gui

Gaming

Programming

How to update UI easily on variable change in MAUI