C#•2y ago

❔ How to add rows in ListView using For loop?

So I'm trying to add multiple rows in ListView using loops. I write up this

C#
  for(int i = 0; i < AList.Count; i++)
    {
         int n = i + 1;
         string [] row = {n.ToString(), AList[i].ToString() + "×" + BList[i].ToString() + "=", PAList[i].ToString(), CAList[i].ToString() };
                        var listViewItem = new ListViewItem(row);
                        ResultListView.Items.Add(listViewItem);
                    
                }

C#
  for(int i = 0; i < AList.Count; i++)
    {
         int n = i + 1;
         string [] row = {n.ToString(), AList[i].ToString() + "×" + BList[i].ToString() + "=", PAList[i].ToString(), CAList[i].ToString() };
                        var listViewItem = new ListViewItem(row);
                        ResultListView.Items.Add(listViewItem);
                    
                }

And I only get 1 row filled seem in the screenshot I took. When I put in string [i] row = , I get the error CS0270 Array size cannot be specified in a variable declaration (try initializing with a 'new' expression).

5 Replies

Omnissiah•2y ago

you have to use Items.AddRange to add more than one item a single call like

ResultListView.Items.AddRange(new []
{
  new ListViewItem(new[] { "stuff" }),
  new ListViewItem(new[] { "moar" })
})

ResultListView.Items.AddRange(new []
{
  new ListViewItem(new[] { "stuff" }),
  new ListViewItem(new[] { "moar" })
})

CakeOP•2y ago

But how would I add the range based on the number of items in the list (for AList)?

Omnissiah•2y ago

i don't understand the question

Johnny Rage•2y ago

It's WinForms or WPF? WPF > ObservableCollection<Model> and it would be added automatically...

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ How to add rows in ListView using For loop?