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因此,儘管在網上找到文章,我仍然無法弄清楚這一點。動態更新數據綁定列表框C#WPF
我有一個列表框
<ListBox HorizontalAlignment="Left" Margin="54,35,0,0" Name="resultsbox" VerticalAlignment="Top" Width="382" Visibility="Collapsed">
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding nameElement}"/>
</StackPanel>
</DataTemplate>
</ListBox>
即數據綁定到
ObservableCollection<string> results = new ObservableCollection<string>();
,並與
private void searchbox_TextChanged(object sender, TextChangedEventArgs e)
{
resultsbox.Visibility = Visibility.Visible;
resultsbox.ItemsSource = results;
if (results.Count == 0)
{
foreach (ele item in eles)
{
if (!results.Contains(item.nameElement))
{
results.Add(item.nameElement);
}
}
}
else
{
resultsbox.Items.Clear();
}
if (searchbox.Text.Equals(""))
{
window1.Height = 47;
resultsbox.Visibility = Visibility.Collapsed;
}
if (resultsbox.Items.Count == 0)
{
resultsbox.Visibility = Visibility.Collapsed;
window1.Height = 47;
}
else{
window1.Height = 47 + (22 * resultsbox.Items.Count);
}
}
它加載在那裏所有的數據更新,但不會更新!
如果我這樣做resultsbox.clear()
它說你不能清除綁定項目。如果你嘗試清除源碼,它什麼也不做。如果您嘗試將resultsbox項目源設置爲null,並清除源並重新綁定它,則不會有任何結果。如果你嘗試和列表框綁定到一個空的源是什麼都不做....
仍不會更新 – 2013-02-21 03:51:29