Loading up ListBox and Event Throwing

[FranciscoDias]

May I say first this forum is just great and there are lots of people here always ready the help and so, I must congratulate all the forum! Well, again, lets stat... I wanted to know how can I load a linked list into a Listbox component. Or if it is even possible.

Then I also wanted to know if it is possible to when select items on the list throw events with a specific item propriety (to confusing?).

Lets say I load up a Listbox with Various Products... and then When I select a given product I wanted that product's info to be loaded into a panel for example.

Hope you can help. thanks

[kristof1104]

You should use an arrayList.. you can fill the listbox like this(i think you can do the same with linklists but i would use an arraylist):

            List<string> list  = new List<string>();
            list.Add("Product 1");
            list.Add("Product 2");
            list.Add("Product 3");

            listBox1.DataSource = list;

for the event handeling:
I used a messagebox but you can call a function that you made yourself that unhides a panel and shows the info.

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            MessageBox.Show("" +listBox1.SelectedValue);
        }

greetz kristof

[FranciscoDias]

Thank you very much!! you explained it very simple and objective! ...thought, I was looking for something more advanced... (I think) lets say the elements of the array are objects from a class for example "class car" and when I list them I want to show their names, or their license nunber, or their year... :/ I think I can load objects into the array but then again how could I list them by one specific proprieties (or by more than one). Should I use a diferent type of component?

thank you once again

[kristof1104]

You're welcome here is how you can achive what you want to do:

lets say you have a class car like this one:

    class car
    {
        public string Name { get; set; }
        public string Licencenr { get; set; }
        public string Year { get; set; }

        public car(string name, string licencenr, string year) {
            Name = name;
            Licencenr = licencenr;
            Year = year;
        }
    }

Then make a function that will be your eventhandler like so:

        private void CheckSelectedListbox1(object sender, EventArgs e)
        {
            if (!(listBox1.SelectedIndex ==-1))//If something is selected
            {
                MessageBox.Show("" + listBox1.SelectedValue );
            }
        }

Now in for example in your formload do this:

            car car1 = new car("BMW", "BGJ-123", "2009");
            car car2 = new car("Audi", "DFY-150", "2008");
            car car3 = new car("Ford", "HDT-343", "2007");

            List<car> list  = new List<car>();
            list.Add(car1);
            list.Add(car2);
            list.Add(car3);

            listBox1.SelectedIndex = -1;//select nothing
            listBox1.DataSource = list;
            listBox1.DisplayMember = "Name";
            listBox1.ValueMember = "Licencenr";
            //Set event after the data is binded!
            listBox1.SelectedIndexChanged += new EventHandler(CheckSelectedListbox1);

DisplayMember = "Name" Makes the listbox show the name(variable of car class) as the item text.
When you use ValueMember = "Licencenr" and you use listbox1.valuemember you'll get the licencenr

greetz kristof

[FranciscoDias]

You nailed it! thank you a lot It was pretty helpful!!

[kristof1104]

No problem mate!