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默认情况下，一些列表框项目被选中，其中一些未被选中。然后用户可以更改选中或未选中的项目。请告诉我如何维护选中的 ids，未选中的 ids ..

 private void CheckBox_Checked(object sender, RoutedEventArgs e)
        {
            ListBoxItem checedItem = this.listBox2.ItemContainerGenerator.ContainerFromItem((sender as CheckBox).DataContext) as ListBoxItem;
            if (checedItem != null)
            {
                checedItem.IsSelected = true;
            }

        }
private void CheckBox_Unchecked(object sender, RoutedEventArgs e)
        {
            ListBoxItem checedItem = this.listBox2.ItemContainerGenerator.ContainerFromItem((sender as CheckBox).DataContext) as ListBoxItem;
            if (checedItem != null)
            {
                checedItem.IsSelected = false;
            }
        }

string result1 = e.Result.ToString();

                XDocument xmlDocu = XDocument.Load(new MemoryStream(System.Text.UTF8Encoding.UTF8.GetBytes(result)));

                interestrates = (from rts in xmlDocu.Descendants("Friend")

                                 select new SampleCheckedData
                                 {

                                     Id = (string)rts.Element("userid"),
                                     Name = (string)rts.Element("name"),
                                     Icon = (string)rts.Element("imageurl"),
                                     IsChecked = !(Boolean)rts.Element("visiblestatus"),

                                 }).ToList<SampleCheckedData>();

                this.listBox2.ItemsSource = interestrates;

<ListBox x:Name="listBox2" SelectionMode="Multiple" Margin="0,67,0,0">
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <StackPanel Orientation="Horizontal">
                            <Image Source="{Binding Icon}" Stretch="Fill" MaxHeight="Infinity" MaxWidth="Infinity" Width="100" Height="100" />

                                <TextBlock Text="{Binding Name}" Width="300" VerticalAlignment="Center" TextWrapping="NoWrap" FontSize="22" />
                            <CheckBox IsChecked="{Binding IsChecked}" Checked="CheckBox_Checked" Unchecked="CheckBox_Unchecked"/>
                        </StackPanel>
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>

编辑：

 private void btnDone_Click(object sender, RoutedEventArgs e)
        {
            var checkedItems = from item in interestrates where item.IsChecked select item.Id;
            var uncheckedItems = from item in interestrates where !item.IsChecked select item.Id;
}

请告诉我如何维护已检查的用户标识，未检查的用户标识.....

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1 回答 1

1

假设您将集合存储在代码中的某个位置，而不仅仅是直接将其分配给 ListBox ItemsSource 属性，您应该能够简单地查看集合项的属性......

var checkedItems = from item in interestrates where item.IsChecked select item;
var uncheckedItems = from item in interestrates where !item.IsChecked select item;

如果您只需要 userIds，则将查询更改为类似

var checkedItems = from item in interestrates where item.IsChecked select item.Id;
var uncheckedItems = from item in interestrates where !item.IsChecked select item.Id;
于 2012-06-06T11:38:58.783 回答