ListView ID Numbers

Question

Hello to everyone,

I have made a "program" where you can add items to listview and automatically a id is added:

ID: Added automatically

Name and Room: User select by another form

but when I remove for example "Item2" ID of course dont change:

I want automatically when item2 has ID: 1 and then autom. item5's ID change to the previous number("1")

also not only to item5 and item6 that I will add later and item7 and 8.

I add the ID with Listview.Count: listView1.Items.Count.ToString()

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George Andredakis

The limits of what a computer can do are difined only from programmer's imagination

Answer 1

Hello George Andredakis,

You could update the ID's all records in the list when an item is removed.

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PS: Kindly close threads by marking answers where appropriate. Thank you.

Answer 2

Yes but how I will do that

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George Andredakis

The limits of what a computer can do are difined only from programmer's imagination

Answer 3

Hi Ghex_AJ,

Thank you for posting here.

According to your question, you could try the following code.

      private void Form1_Load(object sender, EventArgs e)
        {

            listView1.View = View.Details;
            listView1.GridLines = true;
            listView1.FullRowSelect = true;

            //Add column header
            listView1.Columns.Add("ID", 100);
            listView1.Columns.Add("Name", 70);
            listView1.Columns.Add("Room", 70);

            //Add items in the listview
            string[] arr = new string[4];
            ListViewItem itm;

            //Add first item
            arr[0] = "0";
            arr[1] = "Item1";
            arr[2] = "Room1";
            itm = new ListViewItem(arr);
            listView1.Items.Add(itm);

            //Add second item
            arr[0] = "1";
            arr[1] = "Item2";
            arr[2] = "Room5";
            itm = new ListViewItem(arr);
            listView1.Items.Add(itm);

            //Add second item
            arr[0] = "2";
            arr[1] = "Item5";
            arr[2] = "Room1";
            itm = new ListViewItem(arr);
            listView1.Items.Add(itm);


        }

        //remove
        private void button1_Click(object sender, EventArgs e)
        {
            for (int i = listView1.Items.Count - 1; i >= 0; i--)
            {
                if (listView1.Items[i].Selected)
                {
                    listView1.Items[i].Remove();
                }
            }
        }

        //refresh
        private void button2_Click(object sender, EventArgs e)
        {
            for (int i = listView1.Items.Count - 1; i >= 0; i--)
            {
                listView1.Items[i].SubItems[0].Text = i.ToString();
            }
        }

I hope this would be helpful.

Best Regards,

Wendy

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Answer 4

Thanks it helps

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George Andredakis

The limits of what a computer can do are difined only from programmer's imagination