C# 带有字符串组标题的LongListSelector
我有这门课C# 带有字符串组标题的LongListSelector,c#,.net,wpf,windows-phone-7,windows-phone-8,C#,.net,Wpf,Windows Phone 7,Windows Phone 8,我有这门课AlphaKeyGroup: public class AlphaKeyGroup<T> : List<T> { /// <summary> /// The delegate that is used to get the key information. /// </summary> /// <param name="item">An object of type T</param>
AlphaKeyGroup
:
public class AlphaKeyGroup<T> : List<T>
{
/// <summary>
/// The delegate that is used to get the key information.
/// </summary>
/// <param name="item">An object of type T</param>
/// <returns>The key value to use for this object</returns>
public delegate string GetKeyDelegate(T item);
/// <summary>
/// The Key of this group.
/// </summary>
public string Key { get; private set; }
/// <summary>
/// Public constructor.
/// </summary>
/// <param name="key">The key for this group.</param>
public AlphaKeyGroup(string key)
{
Key = key;
}
/// <summary>
/// Create a list of AlphaGroup<T> with keys set by a SortedLocaleGrouping.
/// </summary>
/// <param name="slg">The </param>
/// <returns>Theitems source for a LongListSelector</returns>
private static List<AlphaKeyGroup<T>> CreateGroups(SortedLocaleGrouping slg)
{
List<AlphaKeyGroup<T>> list = new List<AlphaKeyGroup<T>>();
foreach (string key in slg.GroupDisplayNames)
{
list.Add(new AlphaKeyGroup<T>(key));
}
return list;
}
/// <summary>
/// Create a list of AlphaGroup<T> with keys set by a SortedLocaleGrouping.
/// </summary>
/// <param name="items">The items to place in the groups.</param>
/// <param name="ci">The CultureInfo to group and sort by.</param>
/// <param name="getKey">A delegate to get the key from an item.</param>
/// <param name="sort">Will sort the data if true.</param>
/// <returns>An items source for a LongListSelector</returns>
public static List<AlphaKeyGroup<T>> CreateGroups(IEnumerable<T> items, CultureInfo ci, GetKeyDelegate getKey, bool sort)
{
SortedLocaleGrouping slg = new SortedLocaleGrouping(ci);
List<AlphaKeyGroup<T>> list = CreateGroups(slg);
foreach (T item in items)
{
int index = 0;
if (slg.SupportsPhonetics)
{
//check if your database has yomi string for item
//if it does not, then do you want to generate Yomi or ask the user for this item.
//index = slg.GetGroupIndex(getKey(Yomiof(item)));
}
else
{
index = slg.GetGroupIndex(getKey(item));
}
if (index >= 0 && index < list.Count)
{
list[index].Add(item);
}
}
if (sort)
{
foreach (AlphaKeyGroup<T> group in list)
{
group.Sort((c0, c1) => { return ci.CompareInfo.Compare(getKey(c0), getKey(c1)); });
}
}
return list;
}
}
我得到一个长列表选择器,上面有这样的键:
"A"
a...
a...
a....
"B"
"C"
c.....
c..
c..
........
"Playlist"
bla bla bla
"Vimeo Playlist"
bla
bla
bla
我想知道我应该怎么做才能得到这样的组名:
"A"
a...
a...
a....
"B"
"C"
c.....
c..
c..
........
"Playlist"
bla bla bla
"Vimeo Playlist"
bla
bla
bla
我希望能够创建一个带有字符串而不是字符的标题,定义这样一个类
public class PlaylistItem
{
public string ItemName { get; set; }
public string PlayListGroup { get; set; }
}
public MainPage()
{
InitializeComponent();
List<PlaylistItem> PlayList = new List<PlaylistItem>();
//Add your playlistitems in PlayList
PlayList.Add(new PlaylistItem() { ItemName = "abc", PlayListGroup = "Vimeo Playlist" });
PlayList.Add(new PlaylistItem() { ItemName = "ab", PlayListGroup = "Playlist" });
var groupedPlayList =
from list in PlayList
group list by list.PlayListGroup into listByGroup
select new KeyedList<string, PlaylistItem>(listByGroup);
LongListSelectorList.ItemsSource = new List<KeyedList<string, PlaylistItem>>(groupedPlayList);
}
我已经改进了我的答案,检查它并让我知道。它的工作完美!!!我必须做一些改进,使它看起来更好。非常感谢。欢迎光临。是的,现在您的工作是更改其UI并使其符合您的需要:)
<TextBlock Text="{Binding Key}" />