How can I fill a listview in vertical form?

Question

I have one listview whith several columns. I want to fill this listview in a vertical form column to column.

Answer 1

Sorry, but this is not (easily) possible.

A ListView has a list of ListViewItems, where each one has a List of ListViewSubItems (and to make it a little more complex at the first spot, the first ListViewSubItem is the same as the ListViewItem itself).

So if you like to fill up a ListView column by column you first have to add the ListViewItems to the ListView for all the values you want in the first column.

Afterwards you iterate through the ListView.Items and call on every ListViewItem.Subitems.Add to fill up the next column. This must be done for each column you like to fill.

If you like to fill in the column values in another order then from left to right, you should take a look into the DisplayIndex of the ColumnHeader within the ListView.Columns.

Some example code:

// Some values
var someValues = Enumerable.Range(1, 10);

// Fill up the first column
foreach (var item in someValues)
{
    listView.Items.Add("0." + item);
}

// Run for each column in the listView (the first is already filled up)
foreach (ColumnHeader column in listView.Columns.Cast<ColumnHeader>().Skip(1))
{
    // Get the value and the index for which row the value should be
    foreach (var item in someValues.Select((Value, Index) => new { Value, Index }))
    {
        // Add the value to the given row, thous leading to be added as new column
        listView.Items[item.Index].SubItems.Add(column.Index + "." + item.Value);
    }
}