make object variable

Question

I'm making a 7-segment clock in C# and I've come across a problem. I usually code in PHP and this problem is confusing to me.

Let's say I'm trying to assign locations to panels in C# So first use this code:

Panel a = new Panel();
Panel b = new Panel();
Panel c = new Panel();
Panel d = new Panel();
Panel e = new Panel();
Panel f = new Panel();
Panel g = new Panel();

I have an array:

int[,] locationArray = new int[,] {
    {10,20},
    {90,30},
    {90,125},
    {10,210},
    {5,125},
    {5,30},
    {10,115}
};

Than I loop through that array:

for (int d = 0; d < locationArray.GetLength(0); d++)
{
    for (int j = 0; j < locationArray.GetLength(1); j++)
    {
        int locationY = locationArray[i, j];
        int locationX = locationArray[i, 0];

        /* a has to be variable so that I could use one of the panels from a to g. */
        a.Location = new Point(locationX, locationY);
    }
}

So is it possible to make a.Location a variable from a to g without making it complicated/messy like a switch case or if statement.

I wanted to just iterate through an array above the first array to choose the letter. But it doesn't seem to work that way.

You could put them in an array: var panels = new[] { a, b, c, ... };. Then do panels[i].Location = new Point.... You also may not need to assign variables to them, so you could just do var panels = new[] { new Panel(), new Panel(), ..., new Panel() }; — Rob
– Rob ♦, Commented Aug 26, 2015 at 8:53
Or maybe simpler... var panels = Enumerable.Range(1,7).Select(e => new Panel()).ToList(); — Rob
– Rob ♦, Commented Aug 26, 2015 at 8:54

Matías Fidemraizer · Accepted Answer · 2015-08-26 08:54:45Z

4

You can add each panel to an array:

Panel[] panels = new [] { a, b, c, d, e, f, g };

Therefore, you can access a panel by its index inside your loops:

panels[d].Location = new Point(locationX, locationY);

answered Aug 26, 2015 at 8:54

Matías Fidemraizer

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Comments

escargot agile · Accepted Answer · 2015-08-26 08:54:33Z

2

Instead of having separate variables a,b,c,d,e,f,g, try maintaining an array or dictionary of panels, and then everything becomes much simpler:

var panels = new Panel[] { ... }

or

var panel = new Dictionary<int, Panel> { ... }

or

var panel = new Dictionary<string, Panel> { ... }

Another tip that will make your code more readable: replace the two-dimensional array int[,] with an array of location objects:

var locations = new Location[] { ... }

answered Aug 26, 2015 at 8:54

escargot agile

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2 Comments

user2879055 Over a year ago

Thanks for your answer, But how do I add values to them? With the array it is: { {} , {} } how would I do it for the Location?

escargot agile Over a year ago

var locations = new [] { new Location(10,20), new Location(90,30) }; and you just need to add a constructor to the Location class that accepts two arguments and assigns them to fields. Take a look at the Point class which is part of the framework, it might suit your needs.

Thomas Ayoub · Accepted Answer · 2015-08-26 08:56:36Z

1

You can use a list:

Panel a = new Panel();
Panel b = new Panel();
Panel c = new Panel();
Panel d = new Panel();
Panel e = new Panel();
Panel f = new Panel();
Panel g = new Panel();


List<Panel> listOfPanels = new List<Panel>(){a, b, c, d, e, f, g};

foreach (Panel panel in listOfPanels)
{
    // Your stuff goes here
}

answered Aug 26, 2015 at 8:56

Thomas Ayoub

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