Windows 7/Vista breadcrumb looks similar to a list view.
The following picture gives an example (on windows xp) of what I mean (the list appears clicking on the button):
and here's the code to get it:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
var button = sender as Button;
// create fake items list
List<string> strings = new List<string>();
for (int i = 0; i < 36; i++)
strings.Add("ITEM " + (i+1));
var listViewItems = strings.Select(x => new ListViewItem(x, 0)).ToArray();
// create a new list view
ListView listView = new ListView();
listView.View = View.SmallIcon;
listView.SmallImageList = imageList1;
listView.MultiSelect = false;
// add items to listview
listView.Items.AddRange(listViewItems);
// calculate size of list from the listViewItems' height
int itemToShow = 18;
var lastItemToShow = listViewItems.Take(itemToShow).Last();
int height = lastItemToShow.Bounds.Bottom + listView.Margin.Top;
listView.Height = height;
// create a new popup and add the list view to it
var popup = new ToolStripDropDown();
popup.AutoSize = false;
popup.Margin = Padding.Empty;
popup.Padding = Padding.Empty;
ToolStripControlHost host = new ToolStripControlHost(listView);
host.Margin = Padding.Empty;
host.Padding = Padding.Empty;
host.AutoSize = false;
host.Size = listView.Size;
popup.Size = listView.Size;
popup.Items.Add(host);
// show the popup
popup.Show(this, button.Left, button.Bottom);
}
}
EDIT :
To get the selected item, one way is the following:
// change some properties (for selection) and subscribe the ItemActivate
// event of the listView
listView.HotTracking = true;
listView.Activation = ItemActivation.OneClick;
listView.ItemActivate += new EventHandler(listView_ItemActivate);
// the click on the item invokes this method
void listView_ItemActivate(object sender, EventArgs e)
{
var listview = sender as ListView;
var item = listview.SelectedItems[0].ToString();
var dropdown = listview.Parent as ToolStripDropDown;
// unsubscribe the event (to avoid memory leaks)
listview.SelectedIndexChanged -= listView_ItemActivate;
// close the dropdown (if you want)
dropdown.Close();
// do whatever you want with the item
MessageBox.Show("Selected item is: " + item);
}
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