Use an input string as an element of a class

Question

1.00/5 (1 vote)

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these classes were generated by visual studio

C#

{
    public class Rootobject
    {
        public Bird[]? Albatros { get; set; }
        public Bird[]? Avocet { get; set; }
        public Bird[]? Bustard { get; set; }
        public Bird[]? Cassowary { get; set; }
        public Bird[]? Coot { get; set; }
        public Bird[]? Crake { get; set; }
        public Bird[]? Crane { get; set; }
        public Bird[]? Dotterel { get; set; }
        public Bird[]? Emoes { get; set; }
        public Bird[]? Fowl { get; set; }
        public Bird[]? Grebe { get; set; }
        public Bird[]? Gull { get; set; }
        public Bird[]? Hen { get; set; }
        public Bird[]? Heron { get; set; }
        public Bird[]? Ibis { get; set; }
        public Bird[]? Jacana { get; set; }
        public Bird[]? Mollymawk { get; set; }
        public Bird[]? Noddy { get; set; }
        public Bird[]? Oystercatcher { get; set; }
        public Bird[]? Penguin { get; set; }
        public Bird[]? Petrel { get; set; }
        public Bird[]? Pigeons { get; set; }
        public Bird[]? Plover { get; set; }
        public Bird[]? Prion { get; set; }
        public Bird[]? Quail { get; set; }
        public Bird[]? Rail { get; set; }
        public Bird[]? Sandpiper { get; set; }
        public Bird[]? Skua { get; set; }
        public Bird[]? Spoonbill { get; set; }
        public Bird[]? Stilt { get; set; }
        public Bird[]? Stork { get; set; }
        public Bird[]? StormPetrel { get; set; }
        public Bird[]? Tern { get; set; }
        public Bird[]? Ternlet { get; set; }
        public Bird[]? Turkey { get; set; }
        public Bird[]? Turnstone { get; set; }
        public Bird[]? Wanderer { get; set; }
        public Bird[]? Wonga { get; set; }
    }
    public class Bird
    {
        [JsonPropertyName("Ned")]
        public string? ned { get; set; }
        [JsonPropertyName("En")]
        public string? eng { get; set; }
        [JsonPropertyName("Fr")]
        public string? fra { get; set; }
        [JsonPropertyName("Lat")]
        public string? lat { get; set; }
        [JsonPropertyName("Bestand")]
        public string? imgfile { get; set; }
        [JsonPropertyName("Komt_voor_in")]
        public string? distribution { get; set; }
        [JsonPropertyName("zeldzaam")]
        public string? rarity { get; set; }
    }
    public enum Species // this one i made
    {
        Albatros,
        Avocet,
        Bustard,
        Cassowary,
        Coot,
        Crake,
        Crane,
        Dotterel,
        Emoes,
        Fowl,
        Grebe,
        Gull,
        Hen,
        Heron,
        Ibis,
        Jacana,
        Mollymawk,
        Noddy,
        Oystercatcher,
        Penguin,
        Petrel,
        Pigeons,
        Plover,
        Prion,
        Quail,
        Rail,
        Sandpiper,
        Skua,
        Spoonbill,
        Stilt,
        Stork,
        StormPetrel,
        Tern,
        Ternlet,
        Turkey,
        Turnstone,
        Wanderer,
        Wonga
    }
}

I want to input a specie as a Species and then select the birds belonging to the specie.
Also when I input the name or part of the name of a bird I want to indicate with a second input field whether the name is in eng, ned or lat or fr

The problem with the specie is that the RootObject is not enumerable, so I had to make a switch with all the species to get to the birds.
Same for the birds. I wonder it is possible to do something like this:
searchspecie = "Albatros"
Bird[] birds= birdsofaussie.searchspecie where birdsofaussie is the deserialized json file which was used to create the classes.

Thank you in advance for any suggestions

What I have tried:

This works

                string fileContents = LeesJson();
                Rootobject? birdsOfAustralia = JsonSerializer.Deserialize<Rootobject>(fileContents);
                Bird[] birds = birdsOfAustralia.Albatros;
                nofBirds = birds.Count();
                for (int j = 0; j < nofBirds; j++)
                {

                    if (birds[j].eng.IndexOf(SearchName, 0) >= 0)
                    {
                        gezochteVogels[gv] = birds[j];
                        gv++;
                    }
                }
                birds = birdsOfAustralia.Avocet;
                nofBirds = birds.Count();
                for (int j = 0; j < nofBirds; j++)
                {

                    if (birds[j].eng.IndexOf(SearchName, 0) >= 0)
                    {
                        gezochteVogels[gv] = birds[j];
                        gv++;
                    }
                }
...
Now I have to make exact the the same module but eng replaced by ned or fr or lat.
I want to avoid this and if possible use a foreach for the species

Posted 6-May-24 8:37am

Eddy Sels 2021

Updated 6-May-24 9:05am

Dave Kreskowiak

v2

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2 solutions

Solution 2

It took me some reading to figure out dictionaries. Thanks for the suggestion, it put me on the right track.

C#

Dictionary<string, Bird[]> Soorten = new Dictionary<string, Bird[]>();
string fileContents = LeesJson();
Bird[]? birds = null;
Soorten = JsonSerializer.Deserialize<Dictionary<string, Bird[]>>(fileContents);
foreach (string s in Soorten.Keys)
{
    if(SelectedSpecie == s.ToString() && Soorten.TryGetValue(s, out Bird[]? Vogels))
    {
        birds = Vogels;
    }
}

I know I can omit the 'Vogels' and use 'birds' instead in the if statement.

Posted yesterday

Eddy Sels 2021

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Pete O'Hanlon · Accepted Answer · 2024-05-06T09:06:00

Solution 1

Do you have to keep your RootObject? If you change this around, you can use a Dictionary containing the species enumeration as the key, and the bird array as the values.

Posted 6-May-24 9:06am

Pete O'Hanlon

Comments

Eddy Sels 2021 7-May-24 5:58am

not really, but I have not used dictionaries before (I'm not a professional programmer). I tried to make classes of my own, but they didn't work so I left it up to visual studio to create the classes from my json file. I wanted to experiment with json but was not aware json is not the best option to use as a database.

Andre Oosthuizen 8-May-24 14:37pm

You can try this link to get started - Convert JSON to dictionary [^]

Eddy Sels 2021 8-May-24 15:00pm

Thank you for the suggestion, but I have a working app in python. I'm porting it to C# and .NET Core.
In python I use this code:
while index_species < len(birds["Species"]):
while index_birds < len(birds["Species"][specie[index_species]]):
pattern=re.compile(dist_to_search,re.IGNORECASE)
if pattern.search(birds["Species"][specie[index_species]][index_birds]["Komt_voor_in"]) != None:
found_birds.append(birds["Species"][specie[index_species]][index_birds]["En"])
index_birds+=1
else:
index_birds+=1
index_species+=1
index_birds=0
So the deserialization of Json in python is more useful than the one in C#.
I also had to change my Json to be useful in C# (had to remove the species root)