silverlight2中如何实现 DropDownList+Tree？

Question

 

silverlight2中如何实现 DropDownList+Tree的效果？我用combobox+treeview实现了效果，但是怎么也无法把tree的的值付给Combobox。求各位大牛帮帮忙！

Answer 1

 

你是用Silverlight Toolkit 的三方控件包里面的TreeView嘛？

Answer 2

 

是呀 就是用的Silverlight Toolkit 上的TreeView。

Answer 3

Code Snippet

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Windows.Controls;

namespace SilverlightApplication2
{
    public partial class Page : UserControl
    {
        public Page()
        {
            InitializeComponent();
        }

        private void TreeView_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
        {
            TreeViewItem item = new TreeViewItem();
            item = (TreeViewItem)mytree.SelectedItem;
            ItemCollection items = item.Items;
            tbx.Text = item.Header.ToString();
            cbx.Items.Clear();
            for (int i = 0; i < items.Count; i++ )
            {
                cbx.Items.Add(((TreeViewItem)items[i]).Header.ToString());
            }
        }
    }
}

 

 

我这里没问题呀

Answer 4

还是不行，总是在树里选择了在combobox里不显示。最后只好用textbox+treeview自定义了一个控件.

 

Answer 5

喔，你是要在TreeViewItem 里面加 ComboBox是嘛？才看明白，不是点TreeviewItem，在外部的ComboBox显示TreeviewItem列表？

Answer 6

是呀，哈哈！我没有说清楚！不好意思。

Answer 7

Code Snippet

<UserControl x:Class="TreeviewAndCombobox.Page"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:controls="clr-namespace:Microsoft.Windows.Controls;assembly=Microsoft.Windows.Controls"
    xmlns:sys="clr-namespace:System;assembly=mscorlib"
    Width="400" Height="300">
    <Grid x:Name="LayoutRoot" Background="White">
        <controls:TreeView Margin="5">
            <controls:TreeViewItem>
                <controls:TreeViewItem.Header>
                    <Button Content="Button" />
                </controls:TreeViewItem.Header>
            </controls:TreeViewItem>
            <controls:TreeViewItem>
                <controls:TreeViewItem.Header>
                    <CheckBox Content="CheckBox" />
                </controls:TreeViewItem.Header>
            </controls:TreeViewItem>
            <controls:TreeViewItem>
                <controls:TreeViewItem.Header>
                    <TextBox Text="TextBox" />
                </controls:TreeViewItem.Header>
            </controls:TreeViewItem>
            <controls:TreeViewItem>
                <controls:TreeViewItem.Header>
                    <ComboBox x:Name="cbx" SelectionChanged="ComboBox_SelectionChanged">
                        <ComboBox.Items>
                            <TextBlock Text="111"/>
                            <TextBlock Text="222"/>
                            <TextBlock Text="333"/>
                        </ComboBox.Items>
                    </ComboBox>
                </controls:TreeViewItem.Header>
            </controls:TreeViewItem>
        </controls:TreeView>
    </Grid>
</UserControl>

 

 

今天测了,可以啊,不过要用controls:TreeViewItem.Header,不能直接加在controls:TreeViewItem标签下,报错,可能是sl toolkit的问题,因为我运行他的demo直接在controls:TreeViewItem下加控件也报错