Connor Posts - Answer Overflow

Connor

•Created by Connor on 12/11/2024 in #help

How to authenticate a chrome extension using blazor server

Our users sign in to the blazor app using the standard identity authentication with their own username and password. We want users to be able to authenticate themselves to use the chrome extension by being redirected to sign in to blazor app. There's so many different auth flows that I don't know what makes the most sense here. Is oauth2/openiddict overkill? We just need to get basic information about the user: name, email. As well as authorize them to use a couple endpoints that the extension uses. The authorization needs to be added in addition to the current authorization we use.

10 replies

CC#

•Created by Connor on 6/10/2023 in #help

❔ Blazor WASM Default Template 15mb, Production even larger (60mb)

3 replies

CC#

•Created by Connor on 5/1/2023 in #help

❔ How to setup the following relationship?

C#
public class Partner
{
    public long Id { get; set; }
    public ICollection<User> Users { get; set; }
}
public class User
{

    public long Id { get; set; }
    public long PartnerId { get; set; }
    public Partner Partner { get; set; }
    public ICollection<Ticket> Tickets { get; set; }
public class Ticket : ITrackedResource
{
    public long Id { get; set; }
    public long UserId { get; set; }
    public User User { get; set; }
   // public long PartnerId => User?.PartnerId; // would work with eager loading, lazy loading, or explicit loading but I don’t like any of those
}
public interface ITrackedResource
{
    public long PartnerId { get; }
}

C#
public class Partner
{
    public long Id { get; set; }
    public ICollection<User> Users { get; set; }
}
public class User
{

    public long Id { get; set; }
    public long PartnerId { get; set; }
    public Partner Partner { get; set; }
    public ICollection<Ticket> Tickets { get; set; }
public class Ticket : ITrackedResource
{
    public long Id { get; set; }
    public long UserId { get; set; }
    public User User { get; set; }
   // public long PartnerId => User?.PartnerId; // would work with eager loading, lazy loading, or explicit loading but I don’t like any of those
}
public interface ITrackedResource
{
    public long PartnerId { get; }
}

18 replies

CC#

•Created by Connor on 3/14/2023 in #help

❔ How to achieve databinding with render fragments? If at all possible

I know components are a little more suited for this, but this is something I really want to be able to do.

TextInput.razor

<input @bind="Value" @bind:event="oninput" placeholder="Enter text"/>

@code { 
    private string _value;
    [Parameter]
    public string Value
    {
        get => _value;
        set 
        {
            _value = value;
            if (ValueChanged is {HasDelegate: true})
                ValueChanged.InvokeAsync(_value);
        }
    }
    [Parameter]
    public EventCallback<string> ValueChanged { get; set; }
}

TextInput.razor

<input @bind="Value" @bind:event="oninput" placeholder="Enter text"/>

@code { 
    private string _value;
    [Parameter]
    public string Value
    {
        get => _value;
        set 
        {
            _value = value;
            if (ValueChanged is {HasDelegate: true})
                ValueChanged.InvokeAsync(_value);
        }
    }
    [Parameter]
    public EventCallback<string> ValueChanged { get; set; }
}

I want to be able to use this on a page but as a renderfragment.

//Can't be used with other two, causes infinite loop
@Example1(TestString1)
<p>@TestString1</p>
// ##################################################
@Example2(TestString2)
<p>@TestString2</p>
@Example3(x => TestString3 = x)
<p>@TestString3</p>
@code {
    private string TestString1 { get; set; }
    private string TestString2 { get; set; }
    private string TestString3 { get; set; }
    private RenderFragment Example1(string str)
    {
        return @<TextInput @bind-Value="str" ></TextInput>;
    }

    private RenderFragment Example2(string str)
    {
        var action = new Action<string>(value => str = value);
        return@<TextInput ValueChanged="action" ></TextInput>;
    }

    private RenderFragment Example3(Action<string> action)
    {
        return @<TextInput ValueChanged="action"  ></TextInput>;
    }
}

//Can't be used with other two, causes infinite loop
@Example1(TestString1)
<p>@TestString1</p>
// ##################################################
@Example2(TestString2)
<p>@TestString2</p>
@Example3(x => TestString3 = x)
<p>@TestString3</p>
@code {
    private string TestString1 { get; set; }
    private string TestString2 { get; set; }
    private string TestString3 { get; set; }
    private RenderFragment Example1(string str)
    {
        return @<TextInput @bind-Value="str" ></TextInput>;
    }

    private RenderFragment Example2(string str)
    {
        var action = new Action<string>(value => str = value);
        return@<TextInput ValueChanged="action" ></TextInput>;
    }

    private RenderFragment Example3(Action<string> action)
    {
        return @<TextInput ValueChanged="action"  ></TextInput>;
    }
}

Currently only Test3 "works". It appears as if the references to the str in Test1 and Test2 are lost. It would be best if I could put the <input/> directly in the RenderFragment and just bind the value to it but I had to create a component to show that it works with ValueChanged

4 replies

CC#

•Created by Connor on 1/17/2023 in #help

❔ Is there any way to test the rendering of a component in Blazor based on different screen sizes?

I have a component that renders a table. It will render a different amount of rows based on screen size (Width < 800px). Is there any way for me to simulate adjusting screen size in BUnit? Couldn’t find any information online about it

2 replies

CC#

•Created by Connor on 1/5/2023 in #help

✅ Can you add related data to a DbContext like this

I have these classes where Company.Locations navigates to a Locations table and Location.LocationReviews navigates to a LocationReviews table

public class Company : IEntity
{
        public string Id { get; set; }
        public string Name { get; set; }
        public List<Location> Locations {get;set;}
}
public class Location : IEntity
{
        public string Id { get; set; }
        public Company Company { get; set; }
        public List<LocationReview>  LocationReviews { get; set; } = new();
}
public class LocationReview : IEntity
{
        public string Id { get; set; }
        public Location Location { get; set; }
}

public class Company : IEntity
{
        public string Id { get; set; }
        public string Name { get; set; }
        public List<Location> Locations {get;set;}
}
public class Location : IEntity
{
        public string Id { get; set; }
        public Company Company { get; set; }
        public List<LocationReview>  LocationReviews { get; set; } = new();
}
public class LocationReview : IEntity
{
        public string Id { get; set; }
        public Location Location { get; set; }
}

I have a generic controller that Im now finding out only works for Company entities.

    [HttpPut]
    public async Task<ActionResult> Save([FromBody] TItem entity)
    {
        var result = await _dbContext.Set<TItem>().Where(x => x.Id == entity.Id)
            .AsNoTracking()
            .FirstOrDefaultAsync();
        if (result != null)
        {
            _dbContext.Update(entity);
        }
        else
        {
            await _dbContext.Set<TItem>().AddAsync(entity);
        }
        await _dbContext.SaveChangesAsync();
        return Ok();
    }

    [HttpPut]
    public async Task<ActionResult> Save([FromBody] TItem entity)
    {
        var result = await _dbContext.Set<TItem>().Where(x => x.Id == entity.Id)
            .AsNoTracking()
            .FirstOrDefaultAsync();
        if (result != null)
        {
            _dbContext.Update(entity);
        }
        else
        {
            await _dbContext.Set<TItem>().AddAsync(entity);
        }
        await _dbContext.SaveChangesAsync();
        return Ok();
    }

31 replies

CC#

•Created by Connor on 1/4/2023 in #help

❔ Unsupported method exception, how do I fix it?

[ApiController]
[Route($"api/[controller]")]
public class CompanyController : ControllerBase
{
    private ApplicationDbContext _dbContext;
    public CompanyController(ApplicationDbContext dbContext)
    {
        _dbContext = dbContext;
    }
    [HttpPost("{id}")]
    public async Task<ActionResult<TItem>> Get(string id, [FromBody] string[] includes)
    {
        var result = await _dbContext.Set<Company>()
            .Include(x => x.Locations) // THIS CAUSES ERROR
            .Where(x => x.Id == id)
            .AsNoTracking()
            .FirstOrDefaultAsync();
        if (result == null)
        {
            return BadRequest(nameof(TItem) + "Id does not exist");
        }
        return Ok(result);
    }
}


[Test]
public async Task GetTest()
{
var options = new DbContextOptionsBuilder<ApplicationDbContext>()
                .UseInMemoryDatabase(databaseName: "TestDb")
                .Options;
            var operationalStoreOptions = Options.Create(new OperationalStoreOptions());

            var mockDbContext = new Mock<ApplicationDbContext>(options, operationalStoreOptions);
            var mockDbSet = new Mock<DbSet<Company>>();
            mockDbContext.Setup(x => x.Set<Company>()).Returns(mockDbSet.Object);
            var companyController= new CompanyController(mockDbContext.Object);
            var id = "123";
            var includes = new string[] { "Locations" };

            // Act
            var result = await companyController.Get(id, includes);

            // Assert
            Assert.IsInstanceOf<OkObjectResult>(result);
}

[ApiController]
[Route($"api/[controller]")]
public class CompanyController : ControllerBase
{
    private ApplicationDbContext _dbContext;
    public CompanyController(ApplicationDbContext dbContext)
    {
        _dbContext = dbContext;
    }
    [HttpPost("{id}")]
    public async Task<ActionResult<TItem>> Get(string id, [FromBody] string[] includes)
    {
        var result = await _dbContext.Set<Company>()
            .Include(x => x.Locations) // THIS CAUSES ERROR
            .Where(x => x.Id == id)
            .AsNoTracking()
            .FirstOrDefaultAsync();
        if (result == null)
        {
            return BadRequest(nameof(TItem) + "Id does not exist");
        }
        return Ok(result);
    }
}


[Test]
public async Task GetTest()
{
var options = new DbContextOptionsBuilder<ApplicationDbContext>()
                .UseInMemoryDatabase(databaseName: "TestDb")
                .Options;
            var operationalStoreOptions = Options.Create(new OperationalStoreOptions());

            var mockDbContext = new Mock<ApplicationDbContext>(options, operationalStoreOptions);
            var mockDbSet = new Mock<DbSet<Company>>();
            mockDbContext.Setup(x => x.Set<Company>()).Returns(mockDbSet.Object);
            var companyController= new CompanyController(mockDbContext.Object);
            var id = "123";
            var includes = new string[] { "Locations" };

            // Act
            var result = await companyController.Get(id, includes);

            // Assert
            Assert.IsInstanceOf<OkObjectResult>(result);
}

But I get this error

System.NotSupportedException : Specified method is not supported.
   at Microsoft.EntityFrameworkCore.DbSet`1.System.Linq.IQueryable.get_Provider()
   at Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.Include[TEntity](IQueryable`1 source, String navigationPropertyPath)

System.NotSupportedException : Specified method is not supported.
   at Microsoft.EntityFrameworkCore.DbSet`1.System.Linq.IQueryable.get_Provider()
   at Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.Include[TEntity](IQueryable`1 source, String navigationPropertyPath)

28 replies

CC#

•Created by Connor on 1/3/2023 in #help

❔ Why does one request work but the other doesn't when they're exactly the same.

private readonly JsonSerializerOptions JsonOptions = new () { ReferenceHandler = ReferenceHandler.Preserve};

// This works
public async Task CreateMany1(IEnumerable<TEntity> entities)
    {
        var request = new HttpRequestMessage()
        {
            Method = HttpMethod.Post,
            Content = JsonContent.Create(entities, new MediaTypeHeaderValue("application/json"), JsonOptions),
            RequestUri = new Uri(_httpClient.BaseAddress.AbsoluteUri + "/createmany"),
        };
        var response = await _httpClient.SendAsync(request);
        response.EnsureSuccessStatusCode();
    }

public async Task CreateMany2(IEnumerable<TEntity> entities)
    {
        var response = await _httpClient.PostAsJsonAsync("createmany", entities, JsonOptions);
        response.EnsureSuccessStatusCode();
    }

private readonly JsonSerializerOptions JsonOptions = new () { ReferenceHandler = ReferenceHandler.Preserve};

// This works
public async Task CreateMany1(IEnumerable<TEntity> entities)
    {
        var request = new HttpRequestMessage()
        {
            Method = HttpMethod.Post,
            Content = JsonContent.Create(entities, new MediaTypeHeaderValue("application/json"), JsonOptions),
            RequestUri = new Uri(_httpClient.BaseAddress.AbsoluteUri + "/createmany"),
        };
        var response = await _httpClient.SendAsync(request);
        response.EnsureSuccessStatusCode();
    }

public async Task CreateMany2(IEnumerable<TEntity> entities)
    {
        var response = await _httpClient.PostAsJsonAsync("createmany", entities, JsonOptions);
        response.EnsureSuccessStatusCode();
    }

7 replies

CC#

•Created by Connor on 12/30/2022 in #help

❔ Visual Studios tooling not migrating the right SQL server

3 replies

CC#

•Created by Connor on 12/28/2022 in #help

❔ IIS Server doesn't work when I set IP address to all unasssigned

17 replies

CC#

•Created by Connor on 12/19/2022 in #help

❔ How to deal with property’s that need data from a database?

 public class Company
    {
        public float Rating { get; set; }
        public async Task<float> GetRating(IMongoService mongoService)
        {
            var locations = await mongoService.GetLocationsAsync(LocationIds);
          if(locations.Count == 0)
return 0;
           return locations.Average(location=> location.Rating)
       
        }

public List<string> LocationIds { get; set; } = new List<string>();
    }

 public class Company
    {
        public float Rating { get; set; }
        public async Task<float> GetRating(IMongoService mongoService)
        {
            var locations = await mongoService.GetLocationsAsync(LocationIds);
          if(locations.Count == 0)
return 0;
           return locations.Average(location=> location.Rating)
       
        }

public List<string> LocationIds { get; set; } = new List<string>();
    }

I have a Blazor page where I want to display a Company’s rating which is the average of its location ratings. The problem is, I only store the locationIds on the company, not all the data. The best, botched solution I’ve come up with is doing company.Rating = company.GetRating() on initialization (I need the mongo service from the Blazor page to even get it); I can’t remove the Rating property because you can put as async method in html. I feel like a better solution might lie in Lazy initialization or something. I really don’t know though, hence why I’m here. I’m also currently “cluttering” the db of Companies with a Rating property that is always 0 (I get it on demand)

2 replies

CC#

•Created by Connor on 11/19/2022 in #help

How to convert this method into a generic one?

    private List<string> GetEnumNamesCorrected()
    {
        var correctedNames = new List<string>();
        foreach (var enumName in Enum.GetNames(typeof(ManagerType)))
        {
            var wordsInType = 
                Regex.Matches(enumName.ToString(), @"([A-Z][a-z]+)")
                    .Cast<Match>()
                    .Select(m => m.Value);

            var withSpaces = string.Join(" ", wordsInType);
            correctedNames.Add(withSpaces);
        }
        return correctedNames;
    } // Outpets new() { "Human Resources", "General Manager" } just converts to string and adds space at Capital letters
    public enum ManagerType
    {
        HumanResources,
        GeneralManager
    }

    private List<string> GetEnumNamesCorrected()
    {
        var correctedNames = new List<string>();
        foreach (var enumName in Enum.GetNames(typeof(ManagerType)))
        {
            var wordsInType = 
                Regex.Matches(enumName.ToString(), @"([A-Z][a-z]+)")
                    .Cast<Match>()
                    .Select(m => m.Value);

            var withSpaces = string.Join(" ", wordsInType);
            correctedNames.Add(withSpaces);
        }
        return correctedNames;
    } // Outpets new() { "Human Resources", "General Manager" } just converts to string and adds space at Capital letters
    public enum ManagerType
    {
        HumanResources,
        GeneralManager
    }

I want to be able to do ManagerType.GetEnumNamesCorrected(), as well as with all my other enums. I've come up with this sudo code but it doesn't work

    public static class ExtensionMethods
    {
        public static List<string> GetEnumNamesCorrected<T>(this T enu) where T : Enum
        {
            var correctedNames = new List<string>();
            foreach (var enumName in Enum.GetNames(typeof(enu))) // this is an error
            {
                var wordsInType =
                    Regex.Matches(enumName.ToString(), @"([A-Z][a-z]+)")
                        .Cast<Match>()
                        .Select(m => m.Value);

                var withSpaces = string.Join(" ", wordsInType);
                correctedNames.Add(withSpaces);
            }
            return correctedNames;
        }
    }

    public static class ExtensionMethods
    {
        public static List<string> GetEnumNamesCorrected<T>(this T enu) where T : Enum
        {
            var correctedNames = new List<string>();
            foreach (var enumName in Enum.GetNames(typeof(enu))) // this is an error
            {
                var wordsInType =
                    Regex.Matches(enumName.ToString(), @"([A-Z][a-z]+)")
                        .Cast<Match>()
                        .Select(m => m.Value);

                var withSpaces = string.Join(" ", wordsInType);
                correctedNames.Add(withSpaces);
            }
            return correctedNames;
        }
    }

20 replies

CC#

•Created by Connor on 11/11/2022 in #help

❔ Enumerable.Current is not null in debug mode but assigns null to variable

7 replies

CC#

•Created by Connor on 10/19/2022 in #help

Don’t understand nullable reference types

17 replies

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