adding items to listview in loop

I have a problem with listview. I am not sure how to use a loop to fill the items. The following code works for the first row and I think that I need to increment the row but I'm not sure how. When the list contains more than 1 entry I get the error message:

Failed to compare two elements in the array

foreach (List<string> l in list)
{
    ListViewItem item = new ListViewItem(l[0]);
    item.SubItems.Add(l[1]);
    item.SubItems.Add(l[2]);
    item.SubItems.Add(l[3]);
    item.SubItems.Add(l[4]);
    lstBooks.Items.Add(item);
}

below is the whole function. I originally had a problem with the list but it was solved here populating a list of a list of strings but

The view is set to details

    private void ListBo开发者_如何转开发oks()
    {
        lstBooks.Items.Clear();
        lstBooks.Columns.Clear();
        lstBooks.Visible = true;

        List<List<string>> list = db.ListDetailsByGenre();
        lstBooks.Columns.Add("Title", 120);
        lstBooks.Columns.Add("Author", 120);
        lstBooks.Columns.Add("Library", 120);
        lstBooks.Columns.Add("Genre", 120);



     foreach (List<string> l in list)

            ListViewItem item = new ListViewItem(l[0]);
            item.SubItems.Add(l[1]);
            item.SubItems.Add(l[2]);
            item.SubItems.Add(l[3]);
            item.SubItems.Add(l[4]);
            lstBooks.Items.Add(item);

        }

    }

     foreach (List<string> l in list)

        ListViewItem item = new ListViewItem(l[0]);
        item.SubItems.Add(l[1]);
        item.SubItems.Add(l[2]);
        item.SubItems.Add(l[3]);
        item.SubItems.Add(l[4]);
        lstBooks.Items.Add(item);

    }

You are missing an { after your foreach (List l in list) when you uploaded the larger portion of the code but not when you showed the function itself.

I created the following test and no errors occurred.

        List<List<string>> list = new List<List<string>>();

        list.Add(new List<string> { "1a", "1b", "1c", "1d", "1e" });
        list.Add(new List<string> { "2a", "2b", "2c", "2d", "2e" });
        list.Add(new List<string> { "3a", "3b", "3c", "3d", "3e" });
        list.Add(new List<string> { "4a", "4b", "4c", "4d", "4e" });
        list.Add(new List<string> { "5a", "5b", "5c", "5d", "5e" });

        foreach (List<string> l in list)
        {
            ListViewItem item = new ListViewItem(l[0]);
            item.SubItems.Add(l[1]);
            item.SubItems.Add(l[2]);
            item.SubItems.Add(l[3]);
            item.SubItems.Add(l[4]);
            lstBooks.Items.Add(item);
        }

Some points:

• The problem may be in the structure/data of list - provide an example of the contents of list.

• The Add method simply adds the ListViewItem to the end of the Items collection of the ListView, so you don't need to increment the row.

• It likely doesn't apply here, but you might want or need to clear the existing items from the ListView before populating it: lstBooks.Items.Clear();

What other listview properties might be changed from default, and at what point do you get the error?