C#•2w ago

✅ Variable calling from other classes

I've got a question, so imagine I've got 3 classes, and I was trying to make a method to show the information from the 1st class(Info.cs) to 2nd class(Menu.cs) through a 3rd class(MiddleClass.cs), would that be somehow possible?

43 Replies

Angius•2w ago

Sure The two classes can expose a public property And you can access it from their instances

MODiX•2w ago

Angius

REPL Result: Success

class Info
{
    public string Name { get; set; }
    public void SomeMethod()
    {
        Name = "Bob";
    }
}

class Menu
{
    public int Count { get; set; }
    public void SomeOtherMethod()
    {
        Count = 69;
    }
}

var info = new Info();
var menu = new Menu();

info.SomeMethod();
menu.SomeOtherMethod();

Console.WriteLine($"Name is {info.Name} and count is {menu.Count}");

class Info
{
    public string Name { get; set; }
    public void SomeMethod()
    {
        Name = "Bob";
    }
}

class Menu
{
    public int Count { get; set; }
    public void SomeOtherMethod()
    {
        Count = 69;
    }
}

var info = new Info();
var menu = new Menu();

info.SomeMethod();
menu.SomeOtherMethod();

Console.WriteLine($"Name is {info.Name} and count is {menu.Count}");

Console Output

Name is Bob and count is 69

Name is Bob and count is 69

Compile: 526.359ms | Execution: 43.836ms | React with ❌ to remove this embed.

Curlyfry210•2w ago

I think I might have explained wrong here so my issue is I have 2 infos classes (examples only) and let's say you have alot of objects on info1.cs, and in info2.cs u got the information about those objetcs could you search on info1.cs and get the info2.cs connected to it through a method?

Angius•2w ago

Sure, you can pass instances of one class to a method And do whatever with them If you have a lot of objects, I assume it's a list or an array or some other collection In that case yes, you can search for the specific instance LINQ .Where() and/or .FirstOrDefault() will be useful here

Curlyfry210•2w ago

would it be a bother if I sent the example where I'm having this issue?

Angius•2w ago

Sure, go ahead

Curlyfry210•2w ago

it's in another irl language, but it showed to be no bother to another of the helpers here ok

Curlyfry210•2w ago

https://github.com/JoValadares/Issue/tree/main/TrabalhoFinal_23-24/TrabalhoFinal_23-24

GitHub

Issue/TrabalhoFinal_23-24/TrabalhoFinal_23-24 at main · JoValadares...

Contribute to JoValadares/Issue development by creating an account on GitHub.

Curlyfry210•2w ago

so I'm trying to get this method to show the localização of it's creator (NoSensor's location) and it's estadoAtivo (true or false, also in NoSensor) through Sensor.cs Id

Angius•2w ago

SistemaMonitorizacaoAmbiental has the noSensores property that contains multiple NoSensors NoSensor has sensores, which is a list of Sensors That has estatoAdivo So you can loop over noSensores, then over sensores Or use LINQ

Curlyfry210•2w ago

a foreach u say? I really don't know what LINQ is

Angius•2w ago

For example, yes

Curlyfry210•2w ago

but then how'd do the foreach? what would I search in Nosensor

Angius•2w ago

Sensores

foreach (nosensor in noSensores)
    foreach (sensor in nosensor.sensores)
        ...

foreach (nosensor in noSensores)
    foreach (sensor in nosensor.sensores)
        ...

basically

Curlyfry210•2w ago

so right now I have it like this

Curlyfry210•2w ago

and right now it's showing the id and value of the sensor I just searched how would I add a foreach here that'd make the localização and estadoAtivo of the NoSensor that this Sensor belongs to appear on the aftermath

Angius•2w ago

Assuming sensorId is actually an instance of Sensor, and not its ID like it says Get that data from there

Curlyfry210•2w ago

also for some reason when using the foreach here, instead of showing it one time, it'd show the same thing thrice and when I took it off it worked out

Angius•2w ago

Well, if there are three sensores...

Curlyfry210•2w ago

C# mixed in with a language you still have issues with can be such a hard achievement I'm sorry if I don't get it but what does that mean?

Angius•2w ago

If there are three elements in the sensores list, the loop will run three times, so it will print to console three times

Curlyfry210•2w ago

I see, so the problem was that the console write line was inside the foreach not that the foreach itself was wrong

Angius•2w ago

The problem was you expected to get a single sensor, seemingly But you got three At no point did you say "I want just one sensor"

Curlyfry210•2w ago

it was showing only one sensor, but repeating the same one 3 times I've been trying the foreach and still can't get a hold of how to do it in a way that it'd show these variables correspondent to the Id I'm searching for

Curlyfry210•2w ago

Angius•2w ago

Don't select just the ID, get the entire sensor. Then, get those properties from that sensor Assuming dadosAmbientais.leituras is a list of sensors?

Curlyfry210•2w ago

that's where they are read from if that's what you're asking yea

Curlyfry210•2w ago

would this not be enough?

Angius•2w ago

Is it?

Curlyfry210•2w ago

apparently not, since I can't seem to reach even estadoAtivo, which is a Sensor variable

Angius•2w ago

Does this not work, from the MonstrarEstaticadasPorSensor() method? It should be able to list all sensors from all nosensors

Curlyfry210•2w ago

the thing is that method should be able to go to a nosensor, and check if the Id that the user put in exists, and then show the information and for now it's working it's showing back the id and the ValorAtual of the sensor the user asks for but I want it to show more than just the id and valor

Angius•2w ago

Then get more

Curlyfry210•2w ago

that's the issue, how do I call them to the method?

Curlyfry210•2w ago

Angius•2w ago

Get the nosensor the user requests From that nosensor get all sensors Right now your sensores is a list of just the IDs

Curlyfry210•2w ago

yea but I'm not asking the user for nosensores, I'm asking the user for the sensor

Angius•2w ago

But sensors are inside of nosensors

Curlyfry210•2w ago

yes

Angius•2w ago

This class has a list of nosensors Each nosensor has a list of sensors

Curlyfry210•2w ago

yes

Angius•2w ago

So you will need to get all the sensors from all the nosensors And get the one you need

Sensor? sensor = null;
foreach (var ns in nosensors)
{
    foreach (var s in ns.Sensors)
    {
        if (s.Id == UserRequestedIdOrSomething)
        {
            sensor = s;
            break;
        }
    }
}

Sensor? sensor = null;
foreach (var ns in nosensors)
{
    foreach (var s in ns.Sensors)
    {
        if (s.Id == UserRequestedIdOrSomething)
        {
            sensor = s;
            break;
        }
    }
}

Something like this Or with LINQ,

var sensor = nosensors
    .SelectMany(ns => ns.Sensors)
    .Where(s => sId == UserRequestedIdOrSomething)
    .FirstOrDefault();

var sensor = nosensors
    .SelectMany(ns => ns.Sensors)
    .Where(s => sId == UserRequestedIdOrSomething)
    .FirstOrDefault();

Curlyfry210•2w ago

I can definitely see it working I just can't implement it never mind I got it working

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✅ Variable calling from other classes