private void AddSubtreeForItem(HierarchyRow row, WC.TreeNode item)
{
HierarchyRow[] children = row.GetHierarchyChildRows("Hierarchy");
WC.TreeNode childItem;
foreach (HierarchyRow child in children)
{
childItem = new WC.TreeNode((child.Caption ?? "NULL"), child["NavId"].ToString());
item.ChildNodes.Add(childItem);
AddSubtreeForItem(child, childItem);
}
}
/// <summary>
/// renames the selected TreeNode (if any)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void OnRenameButtonClicked(object sender, EventArgs e)
{
if (newLabelTB.Text == "" || menuTree.SelectedNode == null)
{
return;
}
menuTree.SelectedNode.Text = newLabelTB.Text;
HierarchyRow toRename = menuHierarchy.Find(Int32.Parse(menuTree.SelectedValue));
toRename.Caption = newLabelTB.Text;
RecreateChildControls();
}
/// <summary>
/// adds a new tree node as a next parent of the currently selected one
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void OnAddButtonClicked(object sender, EventArgs e)
{
if (newLabelTB.Text == "")
{
return;
}
HierarchyRow newRow = (HierarchyRow)(menuHierarchy.NewRow());
newRow.Caption = newLabelTB.Text;
newRow.NavId = null;
newRow.ParentId = null;
if (menuTree.SelectedNode != null)
{
newRow.ParentId = Int32.Parse(menuTree.SelectedValue);
}
menuHierarchy.Rows.Add(newRow);
RecreateChildControls();
}
/// <summary>
/// removes the selected TreeNode (if any); if it has any children, they leave too!
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void OnRemoveButtonClicked(object sender, EventArgs e)
{
if (menuTree.SelectedNode == null)
{
return;
}
HierarchyRow toRemove = menuHierarchy.Find(Int32.Parse(menuTree.SelectedValue));
hierarchyDataset.Relations["Hierarchy"].ChildKeyConstraint.DeleteRule = Rule.Cascade;
menuHierarchy.Rows.Remove(toRemove);
// the cascading constraint deletes all the child rows of the deleted row, but that only sets them to "Deleted",
// they remain in the table (http://msmvps.com/blogs/williamryan/archive/2005/05/10/46445.aspx).
List <HierarchyRow> deletedRows = (from HierarchyRow r in menuHierarchy.Rows where r.RowState == DataRowState.Deleted select r)
.ToList <HierarchyRow>();
foreach (HierarchyRow r in deletedRows)
{
menuHierarchy.Rows.Remove(r);
}
RecreateChildControls();
}
