Currently selected: Treeview.selectednode
Add top node: TreeView.Nodes.Add ("Key", "Text")
Increase sibling node: TreeView.SelectedNode.Parent.Nodes.Add ("Key", "Text")
Add child nodes: TreeView.SelectedNode.Nodes.Add ("Key", "Text")
Expand All: Treeview.expandall ()
All folds: Treeview.collapseall ()
Re-set the TreeView
database table structure is: ID type name Parent ID
Copy Code code as follows:
private void Loadtreeview ()
{
this. Category of goods Tableadapter1.fill (SUPERCARGODATASET1);
DataTable table = superCargoDataSet1. Goods category;
datarow[] row = table. Select ("Parent id=0");
foreach (DataRow r in row)
{
TreeNode node = Item Category TREEVIEW.NODES.ADD (r["ID"). ToString (), r["type name"]. ToString ());
Recursionshow (node, r["ID"]. ToString ());
}
}
private void Recursionshow (TreeNode nodes, string id)
{
DataTable table = superCargoDataSet1. Goods category;
datarow[] row = table. Select ("Parent id=" + ID);
if (row!= null)
{
foreach (DataRow r in row)
{
TreeNode node = nodes. Nodes.Add (r["ID"). ToString (), r["type name"]. ToString ());
Recursionshow (node, r["ID"]. ToString ());
}
}
}
Delete the selected node and its child nodes while deleting the corresponding records in the database
database table structure is: ID type name Parent ID
Copy Code code as follows:
private void Delete Toolstripbutton_click (object sender, EventArgs e)
{
if (item category Treeview.selectednode!= null)
{
datarow[] Rowchildren = superCargoDataSet1. Goods category. Select ("id=" + Category of Goods TreeView.SelectedNode.Name.ToString ());
if (Rowchildren!= null)
{
foreach (DataRow row in Rowchildren)
{
Delete node (row["ID"]. ToString ());
Row. Delete ();
}
}
Type of goods TreeView.SelectedNode.Remove ();
}
}
private void Delete node (string id)
{
datarow[] Rowchildren = superCargoDataSet1. Goods category. Select ("Parent id=" + ID);
if (Rowchildren!= null)
{
foreach (DataRow row in Rowchildren)
{
Delete node (row["ID"]. ToString ());
Row. Delete ();
}
}
}
TreeView Right-click to select
Copy Code code as follows:
private void TreeView left _mousedown (object sender, MouseEventArgs e)
{
if (E.button = = mousebuttons.right)
{
TreeNode node = left of TreeView. GetNodeAt (E.x, e.y);
if (node!= null)//Right key does not select the node, does not change the currently selected node. VS2005 so.
{
This.treeview to the left. SelectedNode = node;
}
}
}
