访问WPF中列表框内的复选框
本文关键字:复选框 列表 WPF 访问 | 更新日期: 2023-09-27 18:27:22
我的代码如下。
<ListBox x:Name="lstBoxMarket" BorderThickness="0" Height="Auto" HorizontalAlignment="Center" Width="200" Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="2">
<ListBox.ItemTemplate>
<HierarchicalDataTemplate>
<CheckBox IsChecked="{Binding Checked}" CommandParameter="{Binding MarketId}" Tag="{Binding MarketId}" Content="{Binding Market}" Foreground="#FF3D66BE" Name="chkMarket"/>
</HierarchicalDataTemplate>
</ListBox.ItemTemplate>
</ListBox>
我想在单击保存按钮时访问列表中选中和取消选中的复选框。我无法立即访问chkMarket。有人能帮忙吗?
从你的代码开始,我尝试了类似的东西
// find all T in the VisualTree
public static IEnumerable<T> FindVisualChildren<T>(DependencyObject parent)
where T : DependencyObject
{
List<T> foundChilds = new List<T>();
int childrenCount = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < childrenCount; i++)
{
var child = VisualTreeHelper.GetChild(parent, i);
T childType = child as T;
if (childType == null)
{
foreach(var other in FindVisualChildren<T>(child))
yield return other;
}
else
{
yield return (T)child;
}
}
}
然后在您的主窗口中
private void button1_Click(object sender, RoutedEventArgs e)
{
// find all checkboxes in my window
IEnumerable<CheckBox> myBoxes = FindVisualChildren<CheckBox>(this);
int numChecked = 0;
foreach(CheckBox cb in myBoxes)
{
if(cb.Name != "chkMarket")
continue;
if (cb.IsChecked == true)
numChecked++;
}
MessageBox.Show("Checked items = " + numChecked);
}
我的视图模型代码是
public class ViewModel
{
public ViewModel()
{
_persons = new ObservableCollection<Person>();
_persons.Add(new Person() { Name = "Paul", Checked = false });
_persons.Add(new Person() { Name = "Brian", Checked = true });
}
private ObservableCollection<Person> _persons;
public ObservableCollection<Person> Persons
{
get { return _persons; }
}
}
public class Person
{
public String Name { get; set; }
public Boolean Checked { get; set; }
}
您应该能够看到消息"Checked items=1"。希望这能帮助
由于是双向绑定,我可以从列表框的项目源访问复选框选择的值。DataTable lstBoxMarketItemSourceDT=((DataView)lstBoxMarket.ItemsSource).ToTable();
检索到的数据表中的"已选中"列提供更新的复选框值。