因為項目需要，接觸到這個功能點，借助網絡還有自己的一點摸索，實現了這個功能。相關代碼如下：

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XAML部分的代碼：

<ComboBox Grid.Row="0" Grid.Column="9" HorizontalAlignment="Left" Name="OrgaComboBox" Margin="6" VerticalAlignment="Top" Width="200" RenderTransformOrigin="0.392,0.565" DropDownClosed="OrgaComboBox_DropDownClosed"> <ComboBoxItem Visibility="Collapsed"></ComboBoxItem><ComboBoxItem><ComboBoxItem.Template><ControlTemplate><TreeView Name="lftTree" Margin="0" ItemsSource="{Binding}" SelectedItemChanged="lftTree_SelectedItemChanged" DisplayMemberPath="OrgName" SelectedValuePath="OrgId" ><TreeView.ItemContainerStyle><Style TargetType="TreeViewItem"><Setter Property="IsExpanded" Value="{Binding IsExpand}"></Setter></Style></TreeView.ItemContainerStyle><TreeView.ItemTemplate><HierarchicalDataTemplate ItemsSource="{Binding Children}"><TextBlock Text="{Binding OrgName}"></TextBlock></HierarchicalDataTemplate></TreeView.ItemTemplate></TreeView></ControlTemplate></ComboBoxItem.Template></ComboBoxItem></ComboBox>

后臺相關代碼：

ObservableCollection<OrgaViewModel> orgaCollection = new ObservableCollection<OrgaViewModel>();List<IOrganization> iorganizations = this.serviceAgent.QueryRootOrganizations();//List<Organization> iorganizations = this.localDataAccess.QueryRootOrganizations();if (iorganizations == null){return;}foreach (IOrganization current in iorganizations){OrgaViewModel orgaVM = new OrgaViewModel{IsExpanded = true,OrgCode = current.OrgCode,OrgId = current.OrgId,OrgName = current.OrgName,ParentOrgId = current.ParentOrgId};GetChildOrganization(orgaVM);orgaCollection.Add(orgaVM);}this.OrgaComboBox.DataContext = orgaCollection;

為了選中樹的某個節點，能在ComboBox中顯示數據，分別用了樹和下拉框的一個控件事件：

private void lftTree_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e){try{tempOVM = (OrgaViewModel)e.NewValue;selectedOrgName = tempOVM.OrgName;selectedOrgId = tempOVM.OrgId; }catch (Exception ex){logger.Error(ex.ToString());}}private void OrgaComboBox_DropDownClosed(object sender, EventArgs e){OrgaComboBox.Items[0] = selectedOrgName;OrgaComboBox.SelectedItem = OrgaComboBox.Items[0];}

實現的效果基本能滿足項目需要了。

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轉載于:https://www.cnblogs.com/tlduck/p/7580697.html

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