private bool AddNode(TreeViewMItem root, string NodeName = "")
{
if (StoreTree == null)
{
MessageBox.Show("请先创建树");
return(false);
}
TreeViewMItem node = null;
if (root != null)
{
node = new TreeViewMItem(NodeName, root.Path);
root.Items.Add(node);
root.IsExpanded = true; // 展开 root 节点
}
else
{
node = new TreeViewMItem("Root", "");
tree.Items.Add(node);
}
textNodeDB.AddNewNode(node); /// 新节点写入数据库并获取 ID
tree.UpdateLayout();
node.Focus();
return(true);
}
// 节点升级
private bool UpgradeNode(TreeViewMItem node)
{
if (node == null)
{
return(false);
}
TreeViewMItem parent = node.Parent as TreeViewMItem;
if (parent == null)
{
return(false);
}
TreeViewMItem grandPa = parent.Parent as TreeViewMItem;
parent.Items.Remove(node);
if (grandPa != null)
{
grandPa.Items.Add(node);
}
else
{
tree.Items.Add(node);
}
node.Focus();
return(true);
}
// 带有警告提示框
private bool RemoveNode(TreeViewMItem node)
{
if (StoreTree == null)
{
MessageBox.Show("请先创建树");
return(false);
}
if (node == null)
{
return(false);
}
string s = "确定删除节点 “{0}” 及其所有子节点？";
s = String.Format(s, node.Header);
if (MessageBox.Show(s, "警告", MessageBoxButton.YesNo, MessageBoxImage.Information) != MessageBoxResult.Yes)
{
return(false);
}
_removeNode(node);
return(true);
}
private void _removeNode(TreeViewMItem node)
{
if (node == null)
{
return;
}
TreeViewMItem parent = node.Parent as TreeViewMItem;
textNodeDB.DeleteNode(node.ID);
for (int i = node.Items.Count - 1; i >= 0; i--)
{
_removeNode(node.Items[i] as TreeViewMItem);
}
if (parent == null)
{
tree.Items.Remove(node);
tree.UpdateLayout();
}
else
{
parent.Items.Remove(node);
parent.UpdateLayout();
}
}
