sort listview column in csharp

To sort a ListView column in C#, you can handle the ColumnHeaderClick event and sort the items in the ListView based on the clicked column.

Here's an example code:

main.cs
private void listView1_ColumnClick(object sender, ColumnClickEventArgs e)
{
   // Determine if clicked column is already the column that is being sorted.
   if (e.Column == listView1.ListViewItemSorter)
   {
       // Reverse the current sort direction for this column.
       if (listView1.Sorting == SortOrder.Ascending)
           listView1.Sorting = SortOrder.Descending;
       else
           listView1.Sorting = SortOrder.Ascending;
   }
   else
   {
       // Set the column number that is to be sorted; default to ascending.
       listView1.ListViewItemSorter = e.Column;
       listView1.Sorting = SortOrder.Ascending;
   }

   // Perform the sort with these new sort options.
   listView1.Sort();
}
711 chars
22 lines

In this code, we check if the clicked column is already the column that is being sorted. If it is, we reverse the current sort order. If it's a new column, we set the new column to sort and set the default sorting order to ascending. Finally, we perform the sort with the new sort options.

Note that you need to set the ListView.ListViewItemSorter property to an instance of a class that implements the System.Collections.IComparer interface to specify the sort order of the ListView items based on the clicked column. You can implement your own sorting logic or use one of the built-in comparers like StringComparer, NumericComparer, or DateTimeComparer for sorting.