最近在做一个交换机管理的项目,有一个交换机的树,做树的搜索的时候 展开节点居然有点难,自己记录下来 ,以后用的到的时候可以看一下。
展开代码如下,其中
SwitchTree是treeview空间的名称,TreeNode 是绑定在树上的数据类的名称,请注意
private void ExpendTree(TreeNode node) { SwitchTree.UpdateLayout(); for (int i = 0; i < SwitchTree.Items.Count; i++) { TreeNode findNd = SwitchTree.Items[i] as TreeNode; TreeViewItem ti = SwitchTree.ItemContainerGenerator.ContainerFromIndex(i) as TreeViewItem; if (findNd == node && ti != null) { ti.IsExpanded = true; ti.IsSelected = true; if (ti.ItemContainerGenerator.Status != GeneratorStatus.ContainersGenerated) { ti.UpdateLayout(); } //展开 EependTreeByNode(ti); break; } else { if (ti != null) { TreeViewItem treeViewItem= RecurFindeNode(node, ti); if (treeViewItem == null) { ti.IsExpanded = false; continue; } //展开 EependTreeByNode(treeViewItem); break; } } } //EependTreeByNode(node); } private TreeViewItem RecurFindeNode(TreeNode n, TreeViewItem items) { TreeViewItem tv = null; if (n != null && items != null && items.HasItems) { items.IsExpanded = true; foreach (var item in items.Items) { var node = item as TreeNode; if (node == null || (node.nodes!=null&&!node.nodes.Any())) { continue; } if (items.ItemContainerGenerator.Status != GeneratorStatus.ContainersGenerated) { items.UpdateLayout(); } TreeViewItem m_item = items.ItemContainerGenerator.ContainerFromItem(item) as TreeViewItem; if (n == node && m_item != null) { //EependTreeByNode(m_item); tv = m_item; } else { TreeViewItem treeNode = RecurFindeNode(n, m_item); if (treeNode != null) { tv = treeNode; break; } else { //items.IsExpanded = false; } } } } return tv; } private void EependTreeByNode(TreeViewItem contenier) { if (contenier != null) { //if (contenier.HasItems) //{ contenier.IsExpanded = true; contenier.IsSelected = true; //} //else //{ // TreeViewItem parent = (TreeViewItem)contenier.Parent; // if (parent != null) // { // parent.IsExpanded = true; // parent.IsSelected = true; // } //} if (contenier.ItemContainerGenerator.Status != GeneratorStatus.ContainersGenerated) { contenier.UpdateLayout(); } } }
原文地址:https://www.cnblogs.com/wuyaxiansheng/p/11130939.html
时间: 2024-10-16 11:26:20