我正在开发 WPF 应用程序。我以以下方式添加CheckBoxes到 aListBox中。
foreach (User ls in lst)
{
AddContacts(ls, lstContactList);
}
private void AddContacts(User UserData, ListBox lstbox)
{
try
{
var txtMsgConversation = new CheckBox()
{
Padding = new Thickness(1),
IsEnabled = true,
//IsReadOnly = true,
Background = Brushes.Transparent,
Foreground = Brushes.White,
Width = 180,
Height = 30,
VerticalAlignment = VerticalAlignment.Top,
VerticalContentAlignment = VerticalAlignment.Top,
Content = UserData.Name, //+ "\n" + UserData.ContactNo,
Margin = new Thickness(10, 10, 10, 10)
};
var SpConversation = new StackPanel() { Orientation = Orientation.Horizontal };
SpConversation.Children.Add(txtMsgConversation);
var item = new ListBoxItem()
{
Content = SpConversation,
Uid = UserData.Id.ToString(CultureInfo.InvariantCulture),
Background = Brushes.Black,
Foreground = Brushes.White,
BorderThickness = new Thickness(1),
BorderBrush = Brushes.Gray
};
item.Tag = UserData;
lstbox.Items.Add(item);
}
catch (Exception ex)
{
//Need to log Exception
}
}
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现在我需要从ListBox. 我如何继续这里,我尝试了下面的代码,它返回空值,
CheckBox chkBox = lstContactList.SelectedItem as CheckBox;
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任何建议,
问候桑吉塔
在列表框中创建动态多个项目的方式不是在代码隐藏中,而是为项目创建模板,然后将其绑定到项目列表。
例子
说我有一堆段落List<Passage> Passages { get; set; }:
public class Passage
{
public string Name { get; set; }
public bool IsSelected { get; set; }
}
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在我的 xaml 中,我创建了一个模板并绑定到它
<ListBox ItemsSource="{Binding Passages}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<CheckBox IsChecked="{Binding IsSelected, Mode=TwoWay}" />
<TextBlock Text="{Binding Path=Name, StringFormat=Passage: {0}}"
Foreground="Blue" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
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我的四个段落“Alpha”、“Beta”、“Gamma”和“I-25”的结果如下所示:
然后,如果我想要选定的项目,例如Beta上面最近检查的项目,我只需为选定的项目枚举我的列表。
var selecteds = Passages.Where(ps => ps.IsSelected == true);
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需要在一个 ListBox 中列出不同类型的对象吗?说从绑定到复合集合或ObservableCollection<T>?
在此处查看我的答案: