I'm trying to create a quiz program but at the moment I have a list for each category. I would like to use the same list and just call the categories I want in each quiz.
private void LoadQuestions()
{
Question q1 = new Question
{
NameOfQuestion = "Vem är världens bästa golfspelare?",
Options = new List<string>() { "Tiger Woods", "Matt Kuchar", "S.H. Kim", "Adam Scott" },
Answer = "Tiger Woods",
Category = "Golf"
};
Question q2 = new Question
{
NameOfQuestion = "Vad heter Rory i efternamn?",
Options = new List<string>() { "Svensson", "Mcilroy", "Eriksson", "Smith" },
Answer = "Mcilroy",
Category = "Golf"
};
Question q3 = new Question
{
NameOfQuestion = "Hur många golfhål spelar man under en tävling?",
Options = new List<string>() { "18", "26", "72", "180" },
Answer = "72",
Category = "Golf"
};
Question q4 = new Question
{
NameOfQuestion = "Vilken bana spelas Masters på?",
Options = new List<string>() { "TPC Sawgrass", "Agusta", "Halmstad GK", "The Country Club" },
Answer = "Agusta",
Category = "Golf"
};
Question q5 = new Question
{
NameOfQuestion = "Vad har Gustav i HCP?",
Options = new List<string>() { "Alldeles för högt", "Alldeles för lågt", "Han är bäst", "Han är sämst" },
Answer = "Han är sämst",
Category = "Golf"
};
Question q6 = new Question
{
NameOfQuestion = "Hur många spelare är på isen samtidigt?",
Options = new List<string>() { "8", "10", "6", "12" },
Answer = "12",
Category = "Hockey"
};
Question q7 = new Question
{
NameOfQuestion = "Hur lång är en hockeymatch?",
Options = new List<string>() { "40 minuter", "60 minuter", "90 minuter", "45 minuter" },
Answer = "60 minuter",
Category = "Hockey"
};
Question q8 = new Question
{
NameOfQuestion = "Hur många poäng får ett lag om de vinner i övertid?",
Options = new List<string>() { "3", "4", "2", "1" },
Answer = "2",
Category = "Hockey"
};
Question q9 = new Question
{
NameOfQuestion = "Vilken färg har en hockeypuck?",
Options = new List<string>() { "Mörkblå", "Svart", "Grå", "Svart & vit" },
Answer = "Svart",
Category = "Hockey"
};
Question q10 = new Question
{
NameOfQuestion = "Vad kallas det när det står 40-40 i tennis?",
Options = new List<string>() { "Even", "All square", "Deuce", "Even Steven" },
Answer = "Deuce",
Category = "Tennis"
};
Question q11 = new Question
{
NameOfQuestion = "Vad heter den kända svensken som tog 11 grand slam-segrar?",
Options = new List<string>() { "Björn Borg", "Stefan Edberg", "Gustav Eriksson", "Mats Wilander" },
Answer = "Björn Borg",
Category = "Tennis"
};
Question q12 = new Question
{
NameOfQuestion = "Vart föddes den kända tennisspelaren Andy Murray?",
Options = new List<string>() { "Wales", "England", "Scotland", "Ireland" },
Answer = "Scotland",
Category = "Tennis"
};
Question q13 = new Question
{
NameOfQuestion = "Vad kallas det kända mästerskap som spelas i England varje år?",
Options = new List<string>() { "Wimbledon", "Offerthon", "English Tennis Cup", "London Tennis Championship" },
Answer = "Wimbledon",
Category = "Tennis"
};
Question q14 = new Question
{
NameOfQuestion = "Avsluta meningen: Game, Set & ",
Options = new List<string>() { "Victory", "Relax", "Time to make your bet", "Match" },
Answer = "Match",
Category = "Tennis"
};
Question q15 = new Question
{
NameOfQuestion = "Vilken låt är den mest strömmade på spotify?",
Options = new List<string>() { "The Weeknd - Blinding Lights", "Ed Sheeran - Shape Of You", "Tones And I - Dance Monkey", "Post Malone - Rockstar" },
Answer = "The Weeknd - Blinding Lights",
Category = "Music"
};
Question q16 = new Question
{
NameOfQuestion = "Vilket band har gjort låten: Smoke on the water?",
Options = new List<string>() { "Europe", "Iron Maiden", "Rolling Stones", "Deep Purple" },
Answer = "Deep Purple",
Category = "Music"
};
Question q17 = new Question
{
NameOfQuestion = "Vilken är Avicii's mest streamade låt på spotify?",
Options = new List<string>() { "The Nights", "The Days", "Wake Me Up", "Without you" },
Answer = "Wake Me Up",
Category = "Music"
};
Question q18 = new Question
{
NameOfQuestion = "The Beatles är otroligt känt band med bandmedlemmar som John Lennon, Ringo Starr och Paul McCartney. Vad heter den fjärde medlemmen?",
Options = new List<string>() { "George Harisson", "Dean Smith", "George Davidson", "Terry McDavid" },
Answer = "George Harisson",
Category = "Music"
};
Question q19 = new Question
{
NameOfQuestion = "Elvis Presley performed the song Hound dog. Please continue the lyrics to the song: You ain't nothing but a hound dog:",
Options = new List<string>() { "Party'n all the time", "Lying all the time", "Crying all the time", "Smiling everytime" },
Answer = "Crying all the time",
Category = "Music"
};
Question q20 = new Question
{
NameOfQuestion = "Who performed the song: Like a virgin?",
Options = new List<string>() { "Madonna", "Rihanna", "Britney Spears", "Cher" },
Answer = "Madonna",
Category = "Music"
};
Question q21 = new Question
{
NameOfQuestion = "Walter White är en högskolelärare som börjar att tillverka droger. Vad heter denna serie?",
Options = new List<string>() { "Game Of Thrones", "Drugs & Teach", "Breaking Bad", "Cocaine & Clementine" },
Answer = "Breaking Bad",
Category = "Film & TV-Serie"
};
Question q22 = new Question
{
NameOfQuestion = "I sagan om ringen finns det en liten hobbit som blivit förvriden av mörkret. Han mumlar ofta: my precious... Vad heter denna karaktär?",
Options = new List<string>() { "Smeagol", "Reagol", "Chero", "Mearo" },
Answer = "Smeagol",
Category = "Film & TV-Serie"
};
Question q23 = new Question
{
NameOfQuestion = "Vilken film har högst betyg på rating-sidan IMDB?",
Options = new List<string>() { "Gudfadern", "The Dark Knight", "Nyckeln till frihet", "Schindler's List" },
Answer = "Nyckeln till frihet",
Category = "Film & TV-Serie"
};
Question q24 = new Question
{
NameOfQuestion = "Vilken TV-serie har högst betyg på rating-sidan IMDB?",
Options = new List<string>() { "Planet Earth", "Planet Earth II", "Breaking Bad", "Band of Brothers" },
Answer = "Planet Earth II",
Category = "Film & TV-Serie"
};
Question q25 = new Question
{
NameOfQuestion = "Vad heter det svenska företaget som fram till 2012 tillverkade bilar? De kanske är mest kända för sina flygplan.",
Options = new List<string>() { "Volvo", "Audi", "Saab", "Gripen" },
Answer = "Saab",
Category = "Bilar"
};
Question q26 = new Question
{
NameOfQuestion = "Vad heter företaget från Ängelholm som tillverkar världens snabbaste bilar?",
Options = new List<string>() { "Hyundai", "Roendi", "Polestar", "Koenigsegg" },
Answer = "Koenigsegg",
Category = "Bilar"
};
Question q27 = new Question
{
NameOfQuestion = "Volvo är ett stort bilföretag som är baserat i Göteborg, Sverige. Men vad betyder volvo på latin?",
Options = new List<string>() { "Säkerhet", "Jag rullar", "Snabb och kompakt", "Säkert rullande" },
Answer = "Jag rullar",
Category = "Bilar"
};
Question q28 = new Question
{
NameOfQuestion = "Vad heter det kända Italienska bilmärket som är kända för sin röda färg?",
Options = new List<string>() { "Lamborghini", "Rolls Royce", "Audi", "Ferrari" },
Answer = "Ferrari",
Category = "Bilar"
};
Question q29 = new Question
{
NameOfQuestion = "Vilket är världens mest sålda TV-spel?",
Options = new List<string>() { "Counter Strike: Global Offensive", "Minecraft", "World Of Warcraft", "Grand Theft Auto V" },
Answer = "Minecraft",
Category = "TV-Spel"
};
Question q30 = new Question
{
NameOfQuestion = "Vad heter Mario's bror?",
Options = new List<string>() { "Bowser", "Toad", "Luigi", "Yoshi" },
Answer = "Luigi",
Category = "TV-Spel"
};
Question q31 = new Question
{
NameOfQuestion = "Vilken svensk skapade Minecraft?",
Options = new List<string>() { "Markus Persson", "Daniel Ek", "Joakim Larsson", "Max Pettersson" },
Answer = "Markus Persson",
Category = "TV-Spel"
};
Question q32 = new Question
{
NameOfQuestion = "Battle Royale är ett populärt läge. Det innebär att man möter andra lag och laget som är kvar sist vinner. Vilket är det populäraste Battle Royale Spelet?",
Options = new List<string>() { "Fortnite", "Apex Legends", "PUBG: Battlegrounds", "Call Of Duty: Warzone" },
Answer = "PUBG: Battlegrounds",
Category = "TV-Spel"
};
Questions.AddRange(new List<Question> { q1, q2, q3, q4, q5, q6, q7, q8, q9, q10, q11, q12, q13, q14, q15, q16, q17, q18, q19, q20, q21, q22, q23, q24, q25, q26, q27, q28, q29, q30, q31, q32 });
}
This is the list I would like to use, but I'm not sure how to only call the golf questions or how to only call the movies questions etc.
Right now I have a list for each category, so I'm calling the lists in blazor like this:
@if (questionIndex5 < QuestionsGolf.Count)
{
<div >
@QuestionsGolf[questionIndex5].Category
</div>
<div >
@QuestionsGolf[questionIndex5].NameOfQuestion
</div>
<div >
@foreach (var option2 in QuestionsGolf[questionIndex5].Options)
{
<OptionCard Option="@option2" OnOptionSelected="OptionSelectedSolo"></OptionCard>
}
</div>
}
questionIndex5 is just declared as 0 and it 's when selecting an option in OnOptionSelected.
Anyone got any tips for me how too proceed? :)
CodePudding user response：
The other answers already tell you how to filter by category:
IEnumerable<Question> golfQuestions = Questions
.Where(question => question.Category.Equals("Golf"));
// or
List<Question> golfQuestionList = Questions
.Where(question => question.Category.Equals("Golf"))
.ToList();
You seem to be confused how to display this. Often, when working with Lists / IEnumerables we want to display all of them. This could look something like this:
@foreach (Question question in golfQuestions)
{
<div >
@question.Category
</div>
<div >
@question.NameOfQuestion
</div>
<div >
@foreach (var option2 in question.Options)
{
<OptionCard Option="@option2" OnOptionSelected="OptionSelectedSolo">
</OptionCard>
}
</div>
}
If you only want to display a single question, converting to an IEnumerable makes little sense. I would suggest adding .ToArray(), but .ToList() works as well. Here is an example of displaying the third golf question:
Question[] golfQuestions = Questions
.Where(question => question.Category.Equals("Golf"))
.ToArray();
Question myQuestion = gofQuestions[2];
<div >
@myQuestion.Category
</div>
...
CodePudding user response：
You can create a method using the LINQ method Where to achieve this:
private IEnumerable<Question> GetQuestionsForCategory(string category)
{
return Questions.Where(x => x.Category == category)
}
CodePudding user response：
You can use where Questions.Where(x => x.Category == "Golf")
Or if you need to group questions by category then - Questions.GroupBy(x => x.Category) -- with this solution you will get all questions grouped into lists by their category