c# how to insert item and subitem in listview ?

[faustf]

hi guys
i am a new of programming and new of c# i try to learn it , i try to understund how work a listview , i have a file.txt inside of this , i have 4 line .
i have creted a form with a listview with 2 colums i want the even line in the txt appear in first columns and the odd in second column i try is 2 day i did do a test but not work , this is my code , any one can help me? thankz at all

 listView1.View = View.Details;
            listView1.Columns.Add("IP", 100);
            listView1.Columns.Add("MAC", 200);

            string Result = ReadZombieTxt("Zombie.txt");

            if (Result == "")
            {
                using (StreamWriter sw = File.CreateText("Zombie.txt")) ;
            }
            else
            {

                // IList<string> list = new List<string>(Result.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries));
                //string[] strarr = Result.Split(new char[] { ' ' ,'\n'}, StringSplitOptions.RemoveEmptyEntries);

                ///*
                string[]  strarr = System.Text.RegularExpressions.Regex.Split(Result, "\\r\\n");
                int a = 1;
                for (int i = 0; i < strarr.Length; i++)
                {

                    // MessageBox.Show(strarr[i]);
                    //listView1.Items.Add(strarr[i]);//.SubItems.Add(strarr[i]);
                    ListViewItem item = new ListViewItem();
                    if (IsEven(i))
                    {
                        item.Text = strarr[i];
                    }
                    else
                    {
                        item.SubItems.Add(strarr[i]);
                    }

                    listView1.Items.Add(item);

                }
               // */

[tinstaafl]

Does strarr have the proper elements?
Does ReadZombieTxt return the proper string?
What does Zombie.txt look like?

Answer these questions and it'll be easier to get help.

[faustf]

Does strarr have the proper elements? .... i think yes becaus if in for i put a console write or messagebox return correctly all
Does ReadZombieTxt return the proper string? ... i think yes
What does Zombie.txt look like? inside a txt i have 192.168.0.50 first line , second line mac address aa:VV:VV:FF:FF
thankz again for support

[tinstaafl]

It looks to me that you're adding the SubItem to a new LitViewItem instead of an existing one. By stepping through the array by 2, you can add the SubItem to the existing ListViewItem. I haven't been abble to test this, but, something like this should work:

for (int i = 0; i < strarr.Length; i += 2)
{
        ListViewItem item = new ListViewItem();
        item.Text = strarr[i];
        item.SubItems.Add(strarr[i+1]);
        listView1.Items.Add(item);            
}

On a side note, if I'm not mistaken, the ListView.Add method returns a ListViewItem, so you can chain the SubItem.Add on to the ListView.Add.