private void DeleteTreeNode(TreeNode treeNodeSelected)
{
try
{
if (treeNodeSelected.Name == "PARENTNODE")//the selected node is a parentNode
{
if (MessageBox.Show("Do you want to delete this parent node [" + treeNodeSelected.Text + "]" +
" and all its children?\n(NB: This action cannot be undone.)",
"Warning!", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
foreach (TreeNode child in treeNodeSelected.Nodes)//close tabpage if possible
{
CloseTabPage(child.Name);
RecentlyOpenedDocs.DeleteSermonFromID(int.Parse(child.Name));
Sermon.DeleteSermon(int.Parse(child.Name));
}
if (int.TryParse(treeNodeSelected.Name, out int id))
{
CloseTabPage(treeNodeSelected.Name);
RecentlyOpenedDocs.DeleteSermonFromID(int.Parse(treeNodeSelected.Name));
Sermon.DeleteSermon(int.Parse(treeNodeSelected.Name));
}
treeNodeSelected.Remove();
}
}
else//i.e. the selected node is not a parent node
{
TreeNode parentNode = treeNodeSelected.Parent;
if (treeNodeSelected.Name != null)
{
if (MessageBox.Show("Do you want to delete this node [" + treeNodeSelected.Text + "]" +
"?\n(NB: This action cannot be undone.)",
"Warning!", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
CloseTabPage(treeNodeSelected.Name);//close tabpage if possible
treeNodeSelected.Remove();
RecentlyOpenedDocs.DeleteSermonFromID(int.Parse(treeNodeSelected.Name));
Sermon.DeleteSermon(int.Parse(treeNodeSelected.Name));
StatusBarMessages.SetStatusBarMessageAction("Deleted " + treeNodeSelected.Text);
}
}
else
{
MessageBox.Show("Could not access node data.\nPlease try again.", "Failed to delete!");
}
if (parentNode.GetNodeCount(false) == 0)
{
parentNode.Remove();
}
}
}
catch
{
MessageBox.Show("Kindly specify the node to be deleted.");
}
}
private void MenuItemDeleteAll_Click(object sender, EventArgs e)
{
DialogResult userChoice = MessageBox.Show("This option is going to delete every record in your library. Do you wish to continue?\n(NB: This action cannot be undone.)", "Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
if (userChoice == DialogResult.Yes)
{
try
{
foreach (TreeNode tnParentNode in Nodes)
{
foreach (TreeNode tnChildNode in tnParentNode.Nodes)
{
try
{
string szRemoved = tnChildNode.Name;
CloseTabPage(szRemoved);//close tabpage if possible
Sermon.DeleteSermon(int.Parse(szRemoved));
RecentlyOpenedDocs.DeleteSermonFromID(int.Parse(szRemoved));
}
catch {; }
}
}
Nodes.Clear();
Sort();
if (Nodes.Count != 0)
{
MessageBox.Show("An error was encountered in deleting some nodes. Please try again.");
StatusBarMessages.SetStatusBarMessageAction("Partial deletion");
}
else
{
StatusBarMessages.SetStatusBarMessageAction("Deleted all stored sermons");
}
}
catch {; }
}
}
