electronic heartbreak. Posts

electronic heartbreak.

•Created by electronic heartbreak. on 8/23/2024 in #help

Azurite to run in VS or Docker

As the title suggests I wonder if there are any tradeoffs whether I should use Azurite through the built-in Visual Studio method or to implement it through Docker? The project is already configured in Docker, so maybe that's a hint it should be used through Docker too?

1 replies

CC#

•Created by electronic heartbreak. on 7/18/2024 in #help

Using IFormFile in Web API project results in network failure.

Hello everyone reading this thread, As the title suggests, I am trying to upload an image using the IFormFile interface in a property. When I upload the image, the system 'crashes' and I get a network failure with the following message:

Undocumented
Failed to fetch.
Possible Reasons:

CORS
Network Failure
URL scheme must be "http" or "https" for CORS request.

Undocumented
Failed to fetch.
Possible Reasons:

CORS
Network Failure
URL scheme must be "http" or "https" for CORS request.

This is the only code I have added to a default ASP .NET Web API project: Controller:

c#
[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{ 
    private readonly ILogger<WeatherForecastController> _logger;

    public WeatherForecastController(ILogger<WeatherForecastController> logger)
    {
        _logger = logger;
    }

    [HttpPost("simplepost")]
    [Consumes("multipart/form-data")]
    public async Task<IActionResult> Create(IFormFile file)
    {
        Debug.WriteLine(file.FileName);

        return Ok(file.FileName);
    }

    [HttpPost("uploadfile")]
    [Consumes("multipart/form-data")]
    public async Task<IActionResult> UploadFile([FromForm] DtoImage model)
    {
        try
        {
            _logger.LogInformation("UploadFile called.");

            if (model.File == null || model.File.Length == 0)
            {
                _logger.LogWarning("No file uploaded.");
                return BadRequest("No file uploaded.");
            }

            if (string.IsNullOrEmpty(model.Name))
       {
                _logger.LogWarning("No name provided.");
                return BadRequest("No name provided.");
            }

            var uploadsDirectory = Path.Combine(Directory.GetCurrentDirectory(), "uploads");
            _logger.LogInformation("Uploads directory: {UploadsDirectory}", uploadsDirectory);
            return Ok();
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Internal server error.");
            return StatusCode(500, $"Internal server error: {ex.Message}");
        }}}

c#
[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{ 
    private readonly ILogger<WeatherForecastController> _logger;

    public WeatherForecastController(ILogger<WeatherForecastController> logger)
    {
        _logger = logger;
    }

    [HttpPost("simplepost")]
    [Consumes("multipart/form-data")]
    public async Task<IActionResult> Create(IFormFile file)
    {
        Debug.WriteLine(file.FileName);

        return Ok(file.FileName);
    }

    [HttpPost("uploadfile")]
    [Consumes("multipart/form-data")]
    public async Task<IActionResult> UploadFile([FromForm] DtoImage model)
    {
        try
        {
            _logger.LogInformation("UploadFile called.");

            if (model.File == null || model.File.Length == 0)
            {
                _logger.LogWarning("No file uploaded.");
                return BadRequest("No file uploaded.");
            }

            if (string.IsNullOrEmpty(model.Name))
       {
                _logger.LogWarning("No name provided.");
                return BadRequest("No name provided.");
            }

            var uploadsDirectory = Path.Combine(Directory.GetCurrentDirectory(), "uploads");
            _logger.LogInformation("Uploads directory: {UploadsDirectory}", uploadsDirectory);
            return Ok();
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Internal server error.");
            return StatusCode(500, $"Internal server error: {ex.Message}");
        }}}

6 replies

CC#

•Created by electronic heartbreak. on 7/13/2024 in #help

How is Modelstate.IsValid triggered?

Hello! I am reading this tutorial on how DTO's can be implemented with API's: https://dev.to/moe23/net-6-automapper-data-transfer-objects-dtos-49e The process in this tutorial seems normal and you can easily follow along. There are only 2 things I have my questions about: 1. The Driver class in this tutorial has no DataAnnotations (see first codeblock). How come the Modelstate.IsValid can be triggered in codeblock 2?

namespace SampleMapper.Models;

public class Driver
{
    public Guid Id { get; set; }
    public string FirstName { get; set; } = "";
    public string LastName { get; set; } = "";
    public int DriverNumber { get; set; }
    public DateTime DateAdded { get; set; }
    public DateTime DateUpdated { get; set; }
    public int Status { get; set; }
    public int WorldChampionships { get; set; }
}

namespace SampleMapper.Models;

public class Driver
{
    public Guid Id { get; set; }
    public string FirstName { get; set; } = "";
    public string LastName { get; set; } = "";
    public int DriverNumber { get; set; }
    public DateTime DateAdded { get; set; }
    public DateTime DateUpdated { get; set; }
    public int Status { get; set; }
    public int WorldChampionships { get; set; }
}

2. How does Modelstate.IsValid get triggered when a Dto is passed but it gets mapped to an entity?

[HttpPost]
    public IActionResult CreateDriver(DriverCreationDto data)
    {
        var _driver = _mapper.Map<Driver>(data);

        if(ModelState.IsValid)
        {
            drivers.Add(_driver);

            return CreatedAtAction("GetDriver", new {_driver.Id}, data);
        }

        return new JsonResult("Something went wrong") {StatusCode = 500};
    }

[HttpPost]
    public IActionResult CreateDriver(DriverCreationDto data)
    {
        var _driver = _mapper.Map<Driver>(data);

        if(ModelState.IsValid)
        {
            drivers.Add(_driver);

            return CreatedAtAction("GetDriver", new {_driver.Id}, data);
        }

        return new JsonResult("Something went wrong") {StatusCode = 500};
    }

91 replies

CC#

•Created by electronic heartbreak. on 7/11/2024 in #help

ASP.NET Core Web API byte[] issues

Hello there, I am trying to accept a byte array in my API request:

class X {
    public byte[] Test { get; set; }
}

class X {
    public byte[] Test { get; set; }
}

Swagger is used to test the API. When I launch the project and open it in my browser I see that this property accepts a string instead of a byte[]. Googling this issue did not gave much information besides this SO-thread https://stackoverflow.com/questions/77233543/call-an-api-with-byte-array-in-net-6 My question is if this is good enough or has anyone else faced similar issues?

15 replies

CC#

•Created by electronic heartbreak. on 7/8/2024 in #help

✅ Expandability of the ASP.NET WEB API - Mongo tutorial code

Hello there, I am currently following this tutorial: https://learn.microsoft.com/en-us/aspnet/core/tutorials/first-mongo-app?view=aspnetcore-8.0&tabs=visual-studio This tutorial explores the integration of mongo and c#. What in this tutorial is done is that they set collection, database and connection in the env-like file. This means that when you have multiple collections you need to add them here and expend all the setting classes. Another issue I see with this is that https://learn.microsoft.com/en-us/aspnet/core/tutorials/first-mongo-app?view=aspnetcore-8.0&tabs=visual-studio#add-a-crud-operations-service is not maintainable in the long run, becuase of this line:

_booksCollection = mongoDatabase.GetCollection<Book>(
            bookStoreDatabaseSettings.Value.BooksCollectionName);

_booksCollection = mongoDatabase.GetCollection<Book>(
            bookStoreDatabaseSettings.Value.BooksCollectionName);

Would an EF-like approach be more suitable? So you have a MongoDBContext class that holds the collections and DI this Context class into the Service classes?

152 replies

CC#

•Created by electronic heartbreak. on 6/30/2024 in #help

✅ Folder selector can not select folder from phone

18 replies

CC#

•Created by electronic heartbreak. on 6/22/2023 in #help

❔ reduce these magic number code smells

18 replies

CC#

•Created by electronic heartbreak. on 6/12/2023 in #help

❔ Possibilities in simplifying these loops?

I have these 5 loops, however, they look all quite similar, is there a method in simplifying these?

string[] sudokuStrings = filecontent.Split("\r\n");

            //First sudoku (top left) min x = 0, min y = 0, max x = 8, max y = 8
            for (int y = 0; y < 9; y++)
            {
                for (int x = 0; x < 9; x++)
                {
                    int index = y * 9 + x;
                    int value = int.Parse(sudokuStrings[0][index].ToString());
                    //Console.WriteLine($"Cell ({x}, {y}): {value}");
                }
            }

            //Second sudoku (top right) min x = 18, min y = 0, max x = 26, max y = 8
            for (int y = 0; y < 9; y++)
            {
                for (int x = 0; x < 9; x++)
                {
                    int index = y * 9 + x;
                    int value = int.Parse(sudokuStrings[1][index].ToString());
                   // Console.WriteLine($"Cell ({18+x}, {18+y}): {value}");
                }
            }

            //Third sudoku (center) min x = 9, min y = 9, max x = 17, max y = 17
            for (int y = 0; y < 9; y++)
            {
                for (int x = 0; x < 9; x++)
                {
                    int index = y * 9 + x;
                    int value = int.Parse(sudokuStrings[2][index].ToString());
                    //Console.WriteLine($"Cell ({9 + x}, {9 + y}): {value}");
                }
            }

            //Fourth sudoku (bottom left) min x = 0, min y = 18, max x = 8, max y = 26
            for (int y = 0; y < 9; y++)
            {
                for (int x = 0; x < 9; x++)
                {
                    int index = y * 9 + x;
                    int value = int.Parse(sudokuStrings[3][index].ToString());
                    //Console.WriteLine($"Cell ({x}, {18 + y}): {value}");
                }
            }

string[] sudokuStrings = filecontent.Split("\r\n");

            //First sudoku (top left) min x = 0, min y = 0, max x = 8, max y = 8
            for (int y = 0; y < 9; y++)
            {
                for (int x = 0; x < 9; x++)
                {
                    int index = y * 9 + x;
                    int value = int.Parse(sudokuStrings[0][index].ToString());
                    //Console.WriteLine($"Cell ({x}, {y}): {value}");
                }
            }

            //Second sudoku (top right) min x = 18, min y = 0, max x = 26, max y = 8
            for (int y = 0; y < 9; y++)
            {
                for (int x = 0; x < 9; x++)
                {
                    int index = y * 9 + x;
                    int value = int.Parse(sudokuStrings[1][index].ToString());
                   // Console.WriteLine($"Cell ({18+x}, {18+y}): {value}");
                }
            }

            //Third sudoku (center) min x = 9, min y = 9, max x = 17, max y = 17
            for (int y = 0; y < 9; y++)
            {
                for (int x = 0; x < 9; x++)
                {
                    int index = y * 9 + x;
                    int value = int.Parse(sudokuStrings[2][index].ToString());
                    //Console.WriteLine($"Cell ({9 + x}, {9 + y}): {value}");
                }
            }

            //Fourth sudoku (bottom left) min x = 0, min y = 18, max x = 8, max y = 26
            for (int y = 0; y < 9; y++)
            {
                for (int x = 0; x < 9; x++)
                {
                    int index = y * 9 + x;
                    int value = int.Parse(sudokuStrings[3][index].ToString());
                    //Console.WriteLine($"Cell ({x}, {18 + y}): {value}");
                }
            }

8 replies

CC#

•Created by electronic heartbreak. on 6/7/2023 in #help

❔ Get property from type

Through reflection I get all the types matching the interface.

 public void GetRegularTypes()
        {
            var interfaceType = typeof(IRegularPuzzle);
            var implementingTypes = AppDomain.CurrentDomain
                                    .GetAssemblies()
                                    .SelectMany(a => a.GetTypes())
                                    .Where(type => interfaceType.IsAssignableFrom(type)
                                            && !type.IsAbstract
                                            && !type.IsInterface);

            foreach (var type in implementingTypes)
            {
                PropertyInfo nameProperty = type.GetProperty("Name");
                string name = (string)nameProperty.GetValue(null);
                _regularTypes[name.ToLower()] = type;      
            }
        }

 public void GetRegularTypes()
        {
            var interfaceType = typeof(IRegularPuzzle);
            var implementingTypes = AppDomain.CurrentDomain
                                    .GetAssemblies()
                                    .SelectMany(a => a.GetTypes())
                                    .Where(type => interfaceType.IsAssignableFrom(type)
                                            && !type.IsAbstract
                                            && !type.IsInterface);

            foreach (var type in implementingTypes)
            {
                PropertyInfo nameProperty = type.GetProperty("Name");
                string name = (string)nameProperty.GetValue(null);
                _regularTypes[name.ToLower()] = type;      
            }
        }

However, a class has for example:

    public class NineByNineRegularPuzzle : IRegularPuzzle
    {
        public string Name => "9x9";

        public int Size => 9;
    }

    public class NineByNineRegularPuzzle : IRegularPuzzle
    {
        public string Name => "9x9";

        public int Size => 9;
    }

Is there a way I can get the Name property in the foreach? What i tried didnt work.

13 replies

CC#

•Created by electronic heartbreak. on 6/7/2023 in #help

Issue setting up Singleton

In my project, I have a Singleton which I want to use in certain files. When I try to implement it in one I get an error. First, let me show some code: The singleton:

public sealed class RegularPuzzleSingleton : ISingleton
    {
        private const int TrimLength = 13;
        private Dictionary<string, Type> _regularTypes;
        public IRegularPuzzle RegularPuzzle { get; private set; }

        private RegularPuzzleSingleton() 
        {
            GetRegularTypes();
        }

        public static RegularPuzzleSingleton _instance;

        public static RegularPuzzleSingleton GetInstance()
        {
            _instance ??= new RegularPuzzleSingleton();

            return _instance;
        }

        public void GetRegularTypes()
        {
            var interfaceType = typeof(IRegularPuzzle);
            var implementingTypes = AppDomain.CurrentDomain
                                    .GetAssemblies()
                                    .SelectMany(a => a.GetTypes())
                                    .Where(type => interfaceType.IsAssignableFrom(type)
                                            && !type.IsAbstract
                                            && !type.IsInterface);

            foreach (var type in implementingTypes)
            {
                string name = type.Name.ToLower()[..(type.Name.Length - TrimLength)];
                _regularTypes[name] = type;
            }
        }

        public bool IsRegularType(string extension)
        {
            if (_regularTypes.TryGetValue(extension, out Type? regular) && regular != null)
            {
                RegularPuzzle = (IRegularPuzzle)Activator.CreateInstance(regular);
                return true;
            }

            return false;
        }
    }

public sealed class RegularPuzzleSingleton : ISingleton
    {
        private const int TrimLength = 13;
        private Dictionary<string, Type> _regularTypes;
        public IRegularPuzzle RegularPuzzle { get; private set; }

        private RegularPuzzleSingleton() 
        {
            GetRegularTypes();
        }

        public static RegularPuzzleSingleton _instance;

        public static RegularPuzzleSingleton GetInstance()
        {
            _instance ??= new RegularPuzzleSingleton();

            return _instance;
        }

        public void GetRegularTypes()
        {
            var interfaceType = typeof(IRegularPuzzle);
            var implementingTypes = AppDomain.CurrentDomain
                                    .GetAssemblies()
                                    .SelectMany(a => a.GetTypes())
                                    .Where(type => interfaceType.IsAssignableFrom(type)
                                            && !type.IsAbstract
                                            && !type.IsInterface);

            foreach (var type in implementingTypes)
            {
                string name = type.Name.ToLower()[..(type.Name.Length - TrimLength)];
                _regularTypes[name] = type;
            }
        }

        public bool IsRegularType(string extension)
        {
            if (_regularTypes.TryGetValue(extension, out Type? regular) && regular != null)
            {
                RegularPuzzle = (IRegularPuzzle)Activator.CreateInstance(regular);
                return true;
            }

            return false;
        }
    }

26 replies

CC#

•Created by electronic heartbreak. on 6/7/2023 in #help

Testing private methods

Hey there, I have the following code:

c#
public class Input
    { 
        public string SelectLevel() {
            string level;
            bool isValid = false;

            do
            {
                Console.WriteLine("Selecteer een level");
                level = Console.ReadLine();

                if (IsInputValid(level))
                {
                    isValid = true;
                }
            }
            while (!isValid);
            
            return level;
        }

        private static bool IsInputValid(string level)
        {
            return !string.IsNullOrWhiteSpace(level) && level.Length > 5 && level.Contains('.');
        }

        public void AskInput()
        {
            
        }
    }
}

c#
public class Input
    { 
        public string SelectLevel() {
            string level;
            bool isValid = false;

            do
            {
                Console.WriteLine("Selecteer een level");
                level = Console.ReadLine();

                if (IsInputValid(level))
                {
                    isValid = true;
                }
            }
            while (!isValid);
            
            return level;
        }

        private static bool IsInputValid(string level)
        {
            return !string.IsNullOrWhiteSpace(level) && level.Length > 5 && level.Contains('.');
        }

        public void AskInput()
        {
            
        }
    }
}

I want to unit test this code using NUnit, When creating a Setup and initializing the class these 2 methods are in, and trying to write a test for the IsInputValid I see that I cant test private methods. However, it feels needed to test that method. I worked around the issue doing the following, but this feel very ugly.

c#
        [Test]
        public void IsInputValid_ReturnsTrue()
        {
            // Arrange
            MethodInfo isInputValidMethod = typeof(Input)
                .GetMethod("IsInputValid",
                           BindingFlags.NonPublic | BindingFlags.Static);

            string level = "level1.txt";
            // Act
            bool result = (bool)isInputValidMethod.Invoke(null, new object[] { level });

            // Assert
            Assert.That(result, Is.True);
        }

c#
        [Test]
        public void IsInputValid_ReturnsTrue()
        {
            // Arrange
            MethodInfo isInputValidMethod = typeof(Input)
                .GetMethod("IsInputValid",
                           BindingFlags.NonPublic | BindingFlags.Static);

            string level = "level1.txt";
            // Act
            bool result = (bool)isInputValidMethod.Invoke(null, new object[] { level });

            // Assert
            Assert.That(result, Is.True);
        }

If you have a solution for this or adivce, I am curious to know!

7 replies

CC#

•Created by electronic heartbreak. on 5/27/2023 in #help

❔ Choosing correct Console App project.

34 replies

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