Created
August 30, 2013 09:03
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extension of the LongListSelector in Windows Phone 8 to support binding to SelectedItem
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using System.Collections.Generic; | |
using System.Windows; | |
using System.Windows.Controls; | |
using Microsoft.Phone.Controls; | |
namespace ExtendedControls | |
{ | |
public class ExtendedSelector : LongListSelector | |
{ | |
public static readonly DependencyProperty SelectedItemProperty = | |
DependencyProperty.Register("SelectedItem", typeof (object), typeof (ExtendedSelector), new PropertyMetadata(default(object))); | |
public static readonly DependencyProperty SelectionModeProperty = | |
DependencyProperty.Register("SelectionMode", typeof (SelectionMode), typeof (ExtendedSelector), new PropertyMetadata(default(SelectionMode))); | |
public SelectionMode SelectionMode | |
{ | |
get { return (SelectionMode) GetValue(SelectionModeProperty); } | |
set { SetValue(SelectionModeProperty, value); } | |
} | |
public new object SelectedItem | |
{ | |
get { return GetValue(SelectedItemProperty); } | |
set { SetValue(SelectedItemProperty, value); } | |
} | |
public ExtendedSelector() | |
{ | |
SelectionMode = SelectionMode.Single; | |
SelectionChanged += (sender, args) => | |
{ | |
if(SelectionMode == SelectionMode.Single) | |
SelectedItem = args.AddedItems[0]; | |
else if (SelectionMode == SelectionMode.Multiple) | |
{ | |
if (SelectedItem == null) | |
{ | |
SelectedItem = new List<object>(); | |
} | |
foreach (var item in args.AddedItems) | |
{ | |
((List<object>)SelectedItem).Add(item); | |
} | |
foreach (var removedItem in args.RemovedItems) | |
{ | |
if (((List<object>) SelectedItem).Contains(removedItem)) | |
{ | |
((List<object>) SelectedItem).Remove(removedItem); | |
} | |
} | |
} | |
}; | |
} | |
} | |
} |
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