我不确定我在这里做错了什么...
我有一个自定义的哈希表,其中有一种方法可以允许某人从哈希表中删除“partNumber”(一个值)。
删除方法如下:
class COSC202HashTable : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
//....
private List<int> underlyingList;
//...
public List<int> HashList { get { return underlyingList; } }
public void Delete(int partNumber)
{
string theAlgoritnm = Algorithm;
if (String.Compare(theAlgoritnm, "Modulo Division") == 0 && String.Compare(Probe, "Linear Collision Resolution") == 0)
{
LinearModularDivision(partNumber, false);
}
if (String.Compare(theAlgoritnm, "Modulo Division") == 0 && String.Compare(Probe, "Key Offset Collision Resolution") == 0)
{
KeyOffsetModularDivision(partNumber, false);
}
if (String.Compare(theAlgoritnm, "Pseudorandom") == 0)
{
Pseudorandom(partNumber, false);
}
if (String.Compare(theAlgoritnm, "Rotation") == 0)
{
Rotation(partNumber, false);
}
NotifyPropertyChanged("HashList");
}
//.......
private void NotifyPropertyChanged(String info)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(info));
}
}
}
我正在将HashTable的底层值绑定到UI上;但是在删除一个值后,UI没有被更新。我确保拼写等方面没有问题...
这是我为我的WPF UI准备的标记:
<Window.Resources>
<COSC202:COSC202HashTable x:Name="TheHashTable" x:Key="TheHashTable" PropertyChanged="TheHashTable_PropertyChanged"></COSC202:COSC202HashTable>
</Window.Resources>
<ListView x:Name="HashResults" Height="32" Width="1200" Margin="10" HorizontalAlignment="Right"
DataContext="{Binding Source={StaticResource TheHashTable}}" ItemsSource="{Binding Path=HashList}" HorizontalContentAlignment="Left">
<ListView.Background>
<LinearGradientBrush StartPoint="0,0" EndPoint="0,2">
<GradientStop Color="#FF000000" Offset="0"></GradientStop>
<GradientStop Color="DarkBlue" Offset="1"></GradientStop>
</LinearGradientBrush>
</ListView.Background>
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal"></StackPanel>
</ItemsPanelTemplate>
</ListView.ItemsPanel>
<ListView.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" >
<TextBlock Text="{Binding Path=.}" FontSize="11" Foreground="Azure" VerticalAlignment="Top" ></TextBlock>
<Label Content="|" VerticalAlignment="Top" FontSize="5"></Label>
</StackPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
这是我在按钮点击时调用以删除哈希表中项目的代码:
private void DeleteItem_Click(object sender, RoutedEventArgs e)
{
Object item = HashResults.SelectedItem;
COSC202HashTable theHashTable = (COSC202HashTable)this.Resources["TheHashTable"];
if (theHashTable != null && item != null)
{
theHashTable.Delete((int)item);
}
HashResults.SelectedIndex = -1;
}
我做错了什么?
谢谢,
-Frinny
String.Compare()
而不是==
? - svick