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<title>Sub-items</title>
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<br><h1>Sub-items</h1>
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<p>Every item within the list view can contain sub-items. These can be
accessed using <span class="code">BetterListViewItem.SubItems</span> collection.</p>
<p>Sub-items are displayed only in the <strong><em>Details</em></strong> view
when the columns are present. Each item can have any number of sub-items,
but the number of sub-items displayed is limited by the number of column
headers.</p>
<p>The following screenshot shows Better ListView with items and
sub-items displayed on the right of each items (in columns) with one
sub-item being focused (see <strong><em><a href="chapter-focus.html">Focusing
Elements</a></em></strong> for more information):</p>
<p class="images"><img src="sub-items.png"></p>
<h2>Sub-item Visibility</h2>
<p>Sub-item visibility depends on current view and column
headers.</p>
<p>In <strong><em>Details</em></strong> view, every column header has a
corresponding sub-item. If all column headers are visible, sub-item
indices (<span class="code">BetterListViewSubItem.Index</span>) corresponding to their
display order. When individual column headers are <strong><em><a href="chapter-columns.html#hide-custom">hidden</a></em></strong>, the
corresponding sub-items are hidden as well. The display order can be
retrieved using <span class="code">BetterListViewSubItem.DisplayIndex</span> property
in the same way as <span class="code">BetterListViewColumnHeader.DisplayIndex</span>
property. Of course, sub-items with higher display index than the display
index of the last column are hidden.</p>
<p>In <strong><em>Tile</em></strong> view, image and label of the first
sub-item is displayed along with labels of the other sub-items.</p>
<p>In other views, only the first sub-item is visible.</p>
<h2>Copying sub-items</h2>
<p>The sub-item collection behaves differently than other collections
present in Better ListView.</p>
<p>It always have to contain at least one sub-item. Even if you call
<span class="code">Clear</span> method, one sub-item remains in the collection. This is
because this sub-item represents properties of the item itself.</p>
<p>To copy sub-items from one item to another, you have to consider
<strong><em>setting</em></strong> the first sub-item, while adding the
other:</p>
<p><strong>C#</strong></p>
<pre class="prettyprint"><code class="lang-cs">itemTarget.SubItems[0] = (BetterListViewSubItem)itemSource.SubItems[0].Clone();
for (int indexSubItem = 1; indexSubItem &lt; itemSource.SubItems.Count; indexSubItem++)
{
itemTarget.SubItems.Add((BetterListViewSubItem)itemSource.SubItems[indexSubItem].Clone());
}</code></pre>
<p><strong>Visual Basic</strong></p>
<pre class="prettyprint"><code class="lang-vb">itemTarget.SubItems(0) = DirectCast(itemSource.SubItems(0).Clone(), BetterListViewSubItem)
For indexSubItem As Integer = 1 To itemSource.SubItems.Count - 1
itemTarget.SubItems.Add(DirectCast(itemSource.SubItems(indexSubItem).Clone(), BetterListViewSubItem))
Next</code></pre>
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