我正在研究讀取 XML 的接口。我有專輯的列表視圖：<ListView x:Name="albums" HorizontalAlignment="Left" Height="146" Margin="26,99,0,0" VerticalAlignment="Top" Width="686" SelectionChanged="albums_SelectionChanged" Background="{x:Null}" UseLayoutRounding="False" > <ListView.View > <GridView AllowsColumnReorder="False"> <GridView.ColumnHeaderContextMenu> <ContextMenu/> </GridView.ColumnHeaderContextMenu> <GridViewColumn Header="Album" Width="260"> <GridViewColumn.CellTemplate> <DataTemplate> <TextBlock TextWrapping="Wrap" Text="{Binding Titulo}"/> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> <GridViewColumn Header="Artista" Width="260"> <GridViewColumn.CellTemplate> <DataTemplate> <TextBlock TextWrapping="Wrap" Text="{Binding Artist}"/> </DataTemplate> </GridViewColumn.CellTemplate>但是現(xiàn)在當(dāng)我應(yīng)用過濾器時，列表發(fā)生了變化，我不知道如何指向 observablecolecction 的實際“索引”，所以我可以獲得正確的歌曲列表預(yù)先感謝您的幫助
3 回答
米脂
TA貢獻1836條經(jīng)驗 獲得超3個贊
正如 JH 建議的那樣，解決方案是 SelectedItem 而不是 Selectedindex，
結(jié)果代碼是：
private void albums_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
int index = albums.SelectedIndex;
if (index >= 0)
{
int indexid = albums.SelectedIndex;
var selectedObject = albums.SelectedItems[0] as Albumclass.Albumlist2;
if (selectedObject == null)
{
return;
}
id = selectedObject.Id;
//obteniendo lista de albums
string tagurl = "http://" + serverurl + "/server/xml.server.php?action=album_songs&auth=" + token + "&filter=" + id;
string[] tagarray = { tagurl, "song", "track", "title", "composer", "artist", "time", "tag", "comment", "url" };//Creando array con datos a utilizar
//Lennado ListView Songs
Songs.ItemsSource = null;
songs = new ObservableCollection<Albumclass.Albumlist2>();
songs = xmlobserv.Xmlparser(tagarray);
Songs.ItemsSource = songs;
}
}
當(dāng)我重置gridview時，我只使用selectedIndex來避免錯誤
非常感謝
動漫人物
TA貢獻1815條經(jīng)驗 獲得超10個贊
檢查SelectionChangedEventArgs參數(shù)，它包含您的信息。
private void albums_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
//if the listview doesn't allow multi-selection,
//then this list contains only one item
foreach (object o in e.AddedItems)
{
Album al = o as Album;
id = al.Id;
//...
}
}
四季花海
TA貢獻1811條經(jīng)驗 獲得超5個贊
您是否嘗試過類似的方法：
ObservableCollection<Albumclass.Albumlist2> _collection = new ObservableCollection<Albumclass.Albumlist2>(); _collection.IndexOf(_item)
這是文檔http://msdn.microsoft.com/en-us/library/ms132410.aspx
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