iskander Posts - Answer Overflow

iskander

•Created by iskander on 12/28/2024 in #help

✅ how should I deal with common/similar data types between the backend and front?

so i have two projects, one for my backend and the other for the front. now i have this ShopItemDTO in the backend and a very similar ShopItem class for the front. how

C#
namespace BuyMe.ServiceAPI.Models
{
    public class ShopItemDTO
    {
        public string? Title { get; set; }
        public float Rating { get; set; }
        public int Price { get; set; }
        public int Id { get; set; }
        public bool IsOnSale { get; set; }

        public ShopItemDTO() { }
        //ShopItem is unique to the ServiceAPI
        //it has the GUID of the seller that we dont want to share
        public ShopItemDTO(ShopItem ShopItem) =>
        (Title, Rating, Price, Id, IsOnSale) = (ShopItem.Title, ShopItem.Rating, ShopItem.Price, ShopItem.Id, ShopItem.IsOnSale);
    }
}

C#
namespace BuyMe.ServiceAPI.Models
{
    public class ShopItemDTO
    {
        public string? Title { get; set; }
        public float Rating { get; set; }
        public int Price { get; set; }
        public int Id { get; set; }
        public bool IsOnSale { get; set; }

        public ShopItemDTO() { }
        //ShopItem is unique to the ServiceAPI
        //it has the GUID of the seller that we dont want to share
        public ShopItemDTO(ShopItem ShopItem) =>
        (Title, Rating, Price, Id, IsOnSale) = (ShopItem.Title, ShopItem.Rating, ShopItem.Price, ShopItem.Id, ShopItem.IsOnSale);
    }
}

C#

namespace BuyMe.Models;

public class ShopItem_Front()
{
    public string? Title { get; set; }
    public float Rating {get; set;}
    public int Price { get; set; }
    public int Id { get; set; }
    public bool IsOnSale { get; set; }
};

C#

namespace BuyMe.Models;

public class ShopItem_Front()
{
    public string? Title { get; set; }
    public float Rating {get; set;}
    public int Price { get; set; }
    public int Id { get; set; }
    public bool IsOnSale { get; set; }
};

now im still early in the project so the class will probably have stuff added/removed from it and it be tedious to just reflect the changes from both classes. i was thinking i could maybe make the ShopItemDTO shared between the front and backend? but not sure if that would result in any security concerns? or some other problem that i dont know of 😅

12 replies

CC#

•Created by iskander on 12/26/2024 in #help

best approach to handle a nested Scrolling views

1 replies

CC#

•Created by iskander on 1/19/2024 in #help

✅ (Avalonia) i dont get data binding

so im following the official tutorial on how to make a simple to-do app with avalonia. everything is fine and dandy but for whatever reason, trying to add a data context doesnt display my hardcoded values i set!

//MainWindow.axaml
<Window         //boiler plate stuff
        x:DataType="vm:MainWindowViewModel"
        x:Class="testAvaloniaApplication1.Views.MainWindow"
        Title="Iskander's great and grand TO-DO list">
    
    <Views:ToDoListView DataContext="{Binding ToDoList}"/>
    
</Window>

//MainWindow.axaml
<Window         //boiler plate stuff
        x:DataType="vm:MainWindowViewModel"
        x:Class="testAvaloniaApplication1.Views.MainWindow"
        Title="Iskander's great and grand TO-DO list">
    
    <Views:ToDoListView DataContext="{Binding ToDoList}"/>
    
</Window>

7 replies

CC#

•Created by iskander on 11/16/2023 in #help

adding an element to a VerticalStackLayout in c# doesnt work as expected

hi! so i wanted to add a visual element (in my case a ContentView) to a VerticalStackLayout that i declared in the xaml file and exposed it via x:Name="Stack" i tried doing Stack.Add(MyView) in the cs file, it did add it, i checked the "count" variable in the stack and it did increment but it is not visible. when i resize the window the elements pops into existence. obviously i'd love it if it did render without needing to resize 😅

2 replies

CC#

•Created by iskander on 8/8/2023 in #help

✅ TcpClient is connected to TcpListener but TcpListener isn't connected...

so this is how i accept clients which passes through with no issues. i've made to sure to catch any errors that could result from function and none is thrown...

public static async Task<bool> AcceptClient(CancellationToken Token)
    {
        if (!IsServer())
        {
            return false;
        }
        Server.Start();
        TcpClient JoinedClient = await Server.AcceptTcpClientAsync(Token);
        Server.Stop(); 

        if (JoinedClient != null)
        {
            Clients.Add(JoinedClient);
            return true;
        }
        else
        {
            return false;
        }
    }

public static async Task<bool> AcceptClient(CancellationToken Token)
    {
        if (!IsServer())
        {
            return false;
        }
        Server.Start();
        TcpClient JoinedClient = await Server.AcceptTcpClientAsync(Token);
        Server.Stop(); 

        if (JoinedClient != null)
        {
            Clients.Add(JoinedClient);
            return true;
        }
        else
        {
            return false;
        }
    }

this is how the client attempts to connect to the server. this result in a successful connection.

public static async Task<bool> JoinServer(string IpAddress)
    {
        Client = new TcpClient();
        
        if (IPEndPoint.TryParse(IpAddress, out IPEndPoint Result))
        {
            Result.Port = Port;
            await Client.ConnectAsync(Result);
            return true;
        }
        else
        {
            Client = null;
            return false;
        }
    }

public static async Task<bool> JoinServer(string IpAddress)
    {
        Client = new TcpClient();
        
        if (IPEndPoint.TryParse(IpAddress, out IPEndPoint Result))
        {
            Result.Port = Port;
            await Client.ConnectAsync(Result);
            return true;
        }
        else
        {
            Client = null;
            return false;
        }
    }

my pc is the server while my phone is the client. they're in the same network but i havent touched the firewall settings in my pc yet but i assume that wont cause this issue...

26 replies

CC#

•Created by iskander on 8/7/2023 in #help

❔ ✅ (SOLVED) TcpListener.AcceptTcpClientAsync does not get cancelled

CancellationTokenSource cancel = new(400);

TcpClient JoinedClient = await Server.AcceptTcpClientAsync(cancel.Token);

CancellationTokenSource cancel = new(400);

TcpClient JoinedClient = await Server.AcceptTcpClientAsync(cancel.Token);

so i expect this code to accept any tcp clients and if a 400ms period pass it will cancel but for whatever reason AcceptTcpClientAsync keeps halting my execution! i could probably run my own wait timer and if the timer finishes then i will call TcpListener.Stop() but i can see how that workaround would cause issues for in the future. and one odd thing is when a tcp client successfully connects to the server the function doesnt finish execution oddly

16 replies

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