private void midiListView_KeyDown(object sender, KeyEventArgs e)
{
var listView = sender as ListView;
if (MidiFiles.Count > 0 && listView.SelectedItems.Count > 0)
{
//delete item
if (e.Key == Key.Delete || e.Key == Key.Back)
{
var list = new List <MidiFileObject>();
foreach (MidiFileObject item in listView.SelectedItems)
{
list.Add(item);
}
foreach (MidiFileObject item in list)
{
MidiFiles.Remove(item);
}
}
if (listView.SelectedIndex == -1)
{
listView.SelectedItem = MidiFiles.LastOrDefault(); //选中最后一个
}
}
}
/* === MIDI导入 === */
private void importMidiBtn_Click(object sender, RoutedEventArgs e)
{
var beforeCount = MidiFiles.Count;
var midiFileDialog = new Microsoft.Win32.OpenFileDialog
{
Title = "选择MIDI文件",
Filter = "MIDI文件|*.mid",
Multiselect = true
};
if (midiFileDialog.ShowDialog() == true)
{
foreach (var path in midiFileDialog.FileNames)
{
MidiFiles.Add(new MidiFileObject(path));
}
if (beforeCount != 0)
{
midiListView.SelectedItem = MidiFiles.LastOrDefault();
}
}
}