I have diffrent entries in a ListView. I would like to count the entries (starting from the second column). The output should be under the "Total" column (see figure below, framed in red) How can this be achieved? With this code I can only access the individual rows:
for (int j = 1; j < listView1.Items[1].SubItems.Count; j++) { string s = listView1.Items[1].SubItems[j].Text; } 
Many thanks for your help!
Here's your solution
//iterate through all rows for (int i = 0; i < listView1.Items.Count; i++) { //make sure that 5 subitems are present int missingSubitemsCount = 5 - listView1.Items[i].SubItems.Count; for (int j = 0; j < missingSubitemsCount; j++) listView1.Items[i].SubItems.Add(new ListViewItem.ListViewSubItem()); int count = 0; //test columns 1-3 for (int j = 1; j < listView1.Items[i].SubItems.Count - 1; j++) { //check if empty if (String.IsNullOrEmpty(listView1.Items[i].SubItems[j].Text) == false) count++; } //update last column listView1.Items[i].SubItems[4].Text = count.ToString(); } However, i think it would be better to use DataGridView and data binding instead. Operating directly on control can cause problems when project gets bigger. Its just better to separate data from view
Here's how i would do it with DataGridView
class MyItem { public string Name { get; set; } public string Property1 { get; set; } public string Property2 { get; set; } public string Property3 { get; set; } public int Total { get; set; } } private void button2_Click(object sender, EventArgs e) { var items = new List<MyItem>(); items.Add(new MyItem { Name = "Books", Property1 = "A", Property2 = "B", Property3 = "C" }); items.Add(new MyItem { Name = "Pencils", Property1 = "A", Property2 = "B", }); items.Add(new MyItem { Name = "Tapes", Property1 = "A", }); //iterate through all items foreach (var item in items) { //get list of MyItem properties starting with "Property" foreach (var property in typeof(MyItem).GetProperties().Where(u => u.Name.StartsWith("Property"))) { //test if null or empty, increment Total if not if (property.GetValue(item) != null && String.IsNullOrEmpty(property.GetValue(item).ToString()) == false) item.Total++; } //Alternative: Same calculation in one line item.Total = typeof(MyItem).GetProperties().Count(u => u.Name.StartsWith("Property") && u.GetValue(item) != null && String.IsNullOrEmpty(u.GetValue(item).ToString()) == false); } //bind items to DataGridView dataGridView1.DataSource = items; } 
