列表控件 ListBox、ComboBox

列表控件可以当作容器,内部可以有RadioButton、CheckBox、StackPanel等。即Items类型多样。

ListBox,多个Item可被选中;ComboBox,只能有一个Item被选中。

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <ListBox x:Name="listBox" Margin="5" SelectionChanged="listBox_SelectionChanged" >
            <CheckBox x:Name="checkBox" Content="CheckBox"/>
            <CheckBox x:Name="checkBox1" Content="CheckBox1"/>
            <CheckBox x:Name="checkBox2" Content="CheckBox2"/>
        </ListBox>
        <StackPanel Grid.Row="1" Margin="5">
            <TextBlock Text="选中结果"/>
            <TextBlock x:Name="textBlock" TextWrapping="Wrap"/>
            <Button x:Name="button" Content="统计"  HorizontalAlignment="Center" Click="button_Click"/>
        </StackPanel> 
    </Grid>
     private void listBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (listBox.SelectedItem==null)
            {
                return;
            }
            textBlock.Text = "选中的是:" +((CheckBox)listBox.SelectedItem).Content+"\n状态:" + ((CheckBox)listBox.SelectedItem).IsChecked;
        }

        private void button_Click(object sender, RoutedEventArgs e)
        {
            StringBuilder sb = new StringBuilder();
            foreach (CheckBox item in listBox.Items)
            {
                if (item.IsChecked==true)
                {
                    sb.Append(item.Content+"被选中\n");
                }
            }
            textBlock.Text = sb.ToString();
        }

 

posted @ 2019-06-16 22:12  夕西行  阅读(736)  评论(0编辑  收藏  举报