如何从TreeView中获取未选中的复选框 [英] how to get unchecked checkboxes from treeview

问题描述

大家好.
如何使用C#从Treeview控件中获取未经检查的节点?
如果有人知道请让我知道.
我的文件夹结构是这样的:

-a
-b
| _c
| _d
| _e
| | _f
| | _g
| _h
| _i
| _j
| _k
| _l
所有具有复选框的节点，但我未选中b folder.w文件夹是否位于b下，这些复选框也未选中.现在我想要未选中的复选框的文本.

hi to all..
how to get unchecked nodes from treeview control using c#?
if any body knows pls let me know.
my folder structure like this:

-a
-b
|_c
|_d
|_e
| |_f
| |_g
|_h
|_i
|_j
|_k
|_l
all nodes having checkboxes but i unchecked b folder.wat ever the folders are there in under b those checkboxes also unchecked. now i want the text for unchecked checkboxes.
how?

推荐答案

如果您使用的是WPF，则可能会遇到如下问题:

if you are working with WPF you may have a some thing like this:

public class Check
{
    public Check Parent { get; set; }
    public string Name { get; set; }
    public bool? IsChecked { get; set; }
    public List<Check> Child { get; set; }
}

您将拥有:

and you will have this:

private List<Check> _items = new List<Check>();
public List<Check> Items { get { return _items; } set { _items = value; } }

并在构造函数中:

and in the constructor:

DataContext = this;
            //To Add The Parents
            for (int i = 0; i < 10; i++)

                Items.Add(new Check { Name = "Item Number " + i.ToString(), IsChecked = i % 2 == 0 });

            //To Add Child For Each Parent

            foreach (var item in Items)

                item.Child = new List<Check> { new Check { Name = "Child of " + item.Name, IsChecked = !item.IsChecked, Parent = item } };

您将拥有如下方法:

and you will have method like this:

public List<Check> GetUncheckedItems(List<Check> childs)
{
    List<Check> uncheckedItems=new List<Check>();
    foreach (var item in childs)
    {
        if (item.IsChecked==null || (bool)!item.IsChecked)
            uncheckedItems.Add(item);
        if (item.Child != null)
            uncheckedItems.AddRange(GetUncheckedItems(item.Child));
    }
    return uncheckedItems;
}

以及当按钮(单击获取未选中的项目")时:

and when the button (Get Unchecked Items clicked):

private void Button_Click(object sender, RoutedEventArgs e)
{
    var result = "";
    foreach (var item in GetUncheckedItems(Items))
        result += "\n" + item.Name;

    MessageBox.Show(result);
}

最终在XAML中您将拥有:

finally in the XAML you will have:

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="100*" />
        <RowDefinition Height="10*" />
    </Grid.RowDefinitions>
    <TreeView ItemsSource="{Binding Items}">
        <TreeView.ItemTemplate>
            <HierarchicalDataTemplate ItemsSource="{Binding Child}">
                <CheckBox Content="{Binding Name}" IsChecked="{Binding IsChecked}"/>
            </HierarchicalDataTemplate>
        </TreeView.ItemTemplate>
    </TreeView>
    <Button Content="Get Unchecked" Grid.Row="1" Click="Button_Click" />
</Grid>

这篇关于如何从TreeView中获取未选中的复选框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！