Question

默认情况下会检查一些列表框项目，其中一些是未取消选中的。然后用户可以更改已选中或未选中的项目。请告诉我如何维护已检查的ID，未经检查的ID ..

 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ID，未经检查的用户ID .....

Answer 1

假设您在代码中的某处隐藏了您的集合，而不是直接将其分配给ListBox ItemsSource属性，您应该能够只查看集合项的属性......

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

如果只需要userIds，则将查询更改为

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

如何在wp7的列表框中获取已选中和未选中复选框项的ID？

1 个答案: