private void Display ()
{
DT = new Tsorganize (). Organizeds ();
DataView dv = new DataView (DT);
TreeNode nodes = new TreeNode ();
Nodes. Text = "Cross-strait coffee";
Nodes. Value = "0";
if (dt. Rows.Count >= 1)
{
Dv. RowFilter = "Fparentid= '";
if (DV. Count >= 1)
{
foreach (DataRowView drrow in DV)
{
TreeNode Nodel = new TreeNode ();
Nodel. Text = Drrow. row["Forgname"]. ToString ();
Nodel. Value = Drrow. row["Forgno"]. ToString ();
Nodes. Childnodes.add (Nodel);
NodeList (DV, Nodel, Drrow). row["Forgno"]. ToString ());
}
}
}
TREEVLIST.NODES.ADD (Nodes);
}
Spanning tree
private void NodeList (DataView dv, TreeNode node, string parentid)
{
Dv. RowFilter = "fparentid= '" + parentid.tostring () + "'";
if (DV. Count >= 1)
{
foreach (DataRowView drrow in DV)
{
TreeNode Nodel = new TreeNode ();
Nodel. Text = Drrow. row["Forgname"]. ToString ();
Nodel. Value = Drrow. row["Forgno"]. ToString ();
Node. Childnodes.add (Nodel);
NodeList (DV, Nodel, Drrow). row["Forgno"]. ToString ());
}
}
}
============================================================
1.
TreeNodeCollection TNC = Treevlist.checkednodes;
Gets all the selected nodes in the tree
private void Getchecknode (TreeNodeCollection TNC)
{
foreach (TreeNode node in TNC)
{
if (node. Checked)
{
if (node. Childnodes.count = 0)
{
DataRow dr = Tblselchains.newrow ();
dr["Forgno"] = node. Value;
dr["forgname"] = node. Text.tostring ();
TBLSELCHAINS.ROWS.ADD (DR);
}
}
}
}
2. According to the value in the database, to the corresponding nodes of the Checked=true
<summary>
Dtploystore: is a table (saves data read from the database)
<para></para>
</summary>
TreeNodeCollection TNC = Treevlist.nodes;
if (Dtploystore!= null)
{
if (DtPloyStore.Rows.Count > 0)
{
for (int i = 0; i < DtPloyStore.Rows.Count; i++)
{
Getselectedtreenode (TNC, dtploystore.rows[i]["Forgno"). ToString ());
}
}
}
<summary>
Traverse the store tree to get the selected node
<para></para>
</summary>
<param name= "TNC" ></param>
public void Getselectedtreenode (TreeNodeCollection tnc,string checkdata)
{
foreach (TreeNode node in TNC)
{
if (node. Checked)
{
Node. Checked = true;
Break
}
Getselectedtreenode (node. ChildNodes, Checkdata);
}
}
3.javascript Implementation Select parent node, child node automatically selected
Background to add attributes to the TreeView
THIS.TREEVLIST.ATTRIBUTES.ADD ("onclick", "ontreenodechecked ()");
The following are written in the foreground javascript
function ontreenodechecked () {
var ele = window.event.srcElement;
if (Ele.type = = ' checkbox ') {
var childrendivid = ele.id.replace (' CheckBox ', ' Nodes ');
var div = document.getElementById (childrendivid);
if (div = = null) return;
var checkboxs = div.getelementsbytagname (' INPUT ');
for (var i = 0; i < checkboxs.length; i++) {
if (Checkboxs[i].type = = ' checkbox ')
checkboxs[i].checked = ele.checked;
}
}
4. Displaying a checkbox on the TreeView is actually very simple, just set showcheckboxes= "all"
If we want to display the TREEVIW layer, we can set the Expanddepth= "n" (n is the number, which is the number of layers you want to show, 0 for all layers)
