wpf combobox内嵌treeview的问题

ccb8888 2014-03-23 10:59:07

此功能是参考此链接做的. http://www.silverlightchina.net/html/study/WPF/2013/0219/21920.html
xaml代码如下



<ComboBox HorizontalAlignment="Left" Name="FParentId" Margin="295,13,0,0" VerticalAlignment="Top" Width="120" RenderTransformOrigin="0.392,0.565"

                          SelectedIndex="0" DisplayMemberPath="FName" SelectedValuePath="ID"  

                          >

                    <ComboBoxItem Height="0"></ComboBoxItem>                    

                    <ComboBoxItem>

                        <ComboBoxItem.Template>

                            <ControlTemplate>

                                <TreeView Name="lftTree" Margin="0" ItemsSource="{Binding}" SelectedItemChanged="lftTree_SelectedItemChanged"                                                                                     

                                          DisplayMemberPath="FName" SelectedValuePath="ID" >

                                    <TreeView.ItemContainerStyle>

                                        <Style TargetType="TreeViewItem">

                                            <Setter Property="IsExpanded" Value="{Binding IsExpand}"></Setter>

                                        </Style>

                                    </TreeView.ItemContainerStyle>

                                    <TreeView.ItemTemplate>

                                        <HierarchicalDataTemplate  

                                    ItemsSource="{Binding YCommonTypeListChild}">



                                            <TextBlock  Text="{Binding FName}"></TextBlock>



                                        </HierarchicalDataTemplate>

                                    </TreeView.ItemTemplate>

                                </TreeView>

                            </ControlTemplate>

                        </ComboBoxItem.Template>

                        

                    </ComboBoxItem>

                    

                </ComboBox>

后台代码：





public CommonTypeListOp(){

    InitializeComponent();

   this.FParentId.DataContext = bllCt.GetTrees(tList);

}

 private void lftTree_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)

        {

            var a = e.NewValue as Model.YCommonTypeList;

            if (a.ID > 0)

            {

                this.FParentId.Items[0] = a;

                this.FParentId.SelectedIndex = 0;

            }

            

        }

大概运行效果：
第一次点击combobox：

点击treeview上的节点后：

最后在点击combobox:

从结果可以看到点击treeview上的节点已经去到第一个comboxitem,但就是不明白为什么会显示在在combobox上，，
还有一个问题就是。。我的第一个comboxitem高度已经设置为0，但他还是显示出来。不知道如何把他隐藏起来！

...全文

663 13 打赏收藏转发到动态举报

写回复

用AI写文章

13 条回复

切换为时间正序

请发表友善的回复…

发表回复

cool3000 2016-04-17

打赏
举报

给我5分就给你

freehooke 2016-03-05

打赏
举报

引用 11 楼 cool3000 的回复:

我以经解决了这个问题！ private void comboBox_DropDownOpened(object sender, EventArgs e) { //--打开时隐藏要显示的项 cbItemDisplay.Visibility = System.Windows.Visibility.Collapsed; cbItemTreeView.Visibility = System.Windows.Visibility.Visible; } private void comboBox_DropDownClosed(object sender, EventArgs e) { //--关闭时，使显示的项可见 cbItemDisplay.Visibility = System.Windows.Visibility.Visible; cbItemTreeView.Visibility = System.Windows.Visibility.Collapsed; comboBox.SelectedItem = cbItemDisplay;//设置当前的选中项为显示项 } 这两步就OK了

[/quote] 你好，有比较完整的代码吗？谢谢freehooke@hotmail.com

cool3000 2015-12-20

打赏
举报

我以经解决了这个问题！ private void comboBox_DropDownOpened(object sender, EventArgs e) { //--打开时隐藏要显示的项 cbItemDisplay.Visibility = System.Windows.Visibility.Collapsed; cbItemTreeView.Visibility = System.Windows.Visibility.Visible; } private void comboBox_DropDownClosed(object sender, EventArgs e) { //--关闭时，使显示的项可见 cbItemDisplay.Visibility = System.Windows.Visibility.Visible; cbItemTreeView.Visibility = System.Windows.Visibility.Collapsed; comboBox.SelectedItem = cbItemDisplay;//设置当前的选中项为显示项 } 这两步就OK了[/quote]

cool3000 2015-12-20

打赏
举报

我以经解决了这个问题！ private void cbMain_DropDownOpened(object sender, EventArgs e) { //--打开时隐藏要显示的项 cbItemDisplay.Visibility = System.Windows.Visibility.Collapsed; cbItemTreeView.Visibility = System.Windows.Visibility.Visible; } private void cbMain_DropDownClosed(object sender, EventArgs e) { //--关闭时，使显示的项可见 cbItemDisplay.Visibility = System.Windows.Visibility.Visible; cbItemTreeView.Visibility = System.Windows.Visibility.Collapsed; comboBox.SelectedItem = cbItemDisplay;//设置当前的选中项为显示项 } 这两步就OK了

wtxian 2014-08-29