public static void SetSelectedItem(DependencyObject obj, object value) { obj.SetValue(SelectedItemProperty, value); } // Using a DependencyProperty as the backing store for SelectedItem. This enables animation, styling, binding, etc... public static readonly DependencyProperty SelectedItemProperty = ...
很明显,Isslected属性触发,我们想通知viewmodel,treeview的selecteditem属性变了,或者叫做selectindex也变了的意思。所以简单的实现了一个事件聚合器,这个部分代码比较简单,整体如下 publicinterfaceIChanged<T>{voidOnModelChanged(T Model);boolAccepted {get;set; } }publicsealedclassModelChangedManger {privateModelCha...
TheSelectedItemproperty on theTreeViewcontrol is a read-only property and is set to an item when theIsSelectedproperty value of the itemTreeViewis set totrue. 依赖项属性信息 标识符字段SelectedItemProperty 元数据属性设置为true无 适用于
public class Item : INotifyPropertyChanged { private string name; private bool isSelected; private bool isExpanded; … … public bool IsExpanded { get { return isExpanded; } set { isExpanded = value; this.OnPropertyChanged("IsExpanded"); } } public bool IsSelected { get { return isSelected...
9 if (isIntoViewWhenSelected) 10 { 11 //开启了虚拟化且未完成滚动,直接返回 12 var isOpeningVitualizing = ScrollViewer.GetCanContentScroll(treeView) && VirtualizingPanel.GetIsVirtualizing(treeView); 13 if (isOpeningVitualizing && GetHasSetSelectedItemVisible(treeView)) ...
((TreeViewItem)container).IsExpanded) { container.SetValue(TreeViewItem.IsExpandedProperty,true); }// Try to generate the ItemsPresenter and the ItemsPanel.// by calling ApplyTemplate. Note that in the// virtualizing case even if the item is marked// expanded we still need to do this ...
1)当我将某一个父节点(“笔记本板块”)展开,并单击该父节点下的某子节点(“Dell笔记本”)时,SelectedItemChanged事件会执行两次,一次的SelectedItem值为子节点的,另一次是父节点的。觉得这个问题出的很奇怪,想了半天没想明白。 2)另外,当我展开第二个父节点,点击“联想台式笔记本”之后再点击第一个父节点的子...
原文:MVVM里绑定TreeView控件的SelectedItem <TreeView x:Name="treeView"> </TreeView>
How to avoid WPF TreeView SelectedItemChanged being called twice Very often, we need to execute some code in SelectedItemChanged depending on the selected TreeViewItem. But SelectedItemChanged is called twice. This is due to stealing focus from the main window, which is screwing something up.