show array elements in listbox c#

Question

Hi I'm trying to see the elements of an array in a listbox, my array is in a class, but I dont know how to see the elements of the array in a windows form listbox. This is my code:

 NumSepaERG[0] = Convert.ToDouble(columnas[1]);
 ListBox listbox2 = new ListBox();
 listbox2.Items.Add(NumSepaERG[0]);

But I know how view the elements in the listbox.

Each Form has a property named Controls which gives you access to the "list" of it's child controls. Simply add your ListBox to this collection. — Mithrandir
– Mithrandir, Commented Oct 10, 2012 at 15:12
this code is in a class named Import, i want to see the values of NumSepaERG in a windows form Listbox. — Carl_Honcho
– Carl_Honcho, Commented Oct 10, 2012 at 15:35

Damith · Accepted Answer · 2012-10-10 15:55:20Z

1

ListBox listBox1 = new ListBox();
// add items 
listBox1.Items.Add(NumSepaERG[0]);
// add to controls 
Controls.Add(listBox1);

if you have array as items then you can use AddRange method as:

listBox1.Items.AddRange(NumSepaERG);
Controls.Add(listBox1);

Update

create object of your class which contain array...

e.g. :

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        ListBox listBox1 = new ListBox();
        MyClass obj = new MyClass();
        listBox1.DataSource = obj.NumSepaERG;
        Controls.Add(listBox1);
    }
}
public class MyClass
{
    public double[] NumSepaERG { get; set; }
    public MyClass()
    {
        NumSepaERG =new double[] {2.0, 5.6};
    }
}

edited Oct 10, 2012 at 15:55

answered Oct 10, 2012 at 15:17

Damith

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2 Comments

Carl_Honcho Over a year ago

NumSepaERG is on a class named Import, and I want to see the elements of NumSepaERG on a listbox in my windows form..

Carl_Honcho Over a year ago

Ok, but NumSepaERG contains data from a file that was selected with openfiledialog, that's why is in the Import class

Aghilas Yakoub · Accepted Answer · 2012-10-10 15:12:15Z

1

You can try with this code

var listbox2 = new ListBox();
foreach(var item in columnas)
{
 listbox2.Items.Add(item);
}
this.Controls.Add(listbox2 );

answered Oct 10, 2012 at 15:12

Aghilas Yakoub

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9 Comments

Kamil Over a year ago

You dont have to create (first line of A.Yakoub code) that listbox. You can use listbox that you already put on you form with "Form Designer".

Carl_Honcho Over a year ago

Hi IvanL, I new in C# how do I add the listbox to FOrm.controls??

Aghilas Yakoub Over a year ago

@Carl you can try with this.Controls.Add(listbox2);

Aghilas Yakoub Over a year ago

YourForms.Controls.Add(listbox2)

Carl_Honcho Over a year ago

My form is named Form1 but doesnt appear Controls, it appear only ControlCollection

|

Laoujin · Accepted Answer · 2012-10-10 15:13:50Z

1

ListBox.Items implements IEnumerable through ListBox.ObjectCollection so you can use a foreach to loop over the elements.

foreach (var element in listBox2.Items)
{
    MessageBox.Show(element.ToString());
}

answered Oct 10, 2012 at 15:13

Laoujin

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1 Comment

Laoujin Over a year ago

Looks like I misunderstood, I thought the OP wanted to know how to view the elements in the listbox...

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