Asp.net operation Treeview

The younger brother was very clumsy in writing. If you have any experts, please give me some advice and let the younger brother learn and learn...

 

Load tree -- use recursion 

Protected void loadchannel ()
{
Datatable dt = bllchannel. getlist ();

Datarow [] parent = DT. Select ("parentid = 0 ");
Foreach (datarow parentrow in parent)
{
Treenode node = new treenode (parentrow ["title"]. tostring (), parentrow ["ID"]. tostring ());
Node. tooltip = parentrow ["title"]. tostring () + "=>" + parentrow ["ID"]. tostring (); // This is to use js to get the node's text and value.
Bindtree (DT, node, parentrow ["ID"]. tostring ());
Treeview1.nodes. Add (node );
}
}
Void bindtree (datatable DT, treenode node, string parentid)
{
Datarow [] ROW = DT. Select ("parentid =" + parentid );
Foreach (datarow R in row)
{
Treenode n = new treenode (R ["title"]. tostring (), R ["ID"]. tostring ());
N. tooltip = R ["title"]. tostring () + "=>" + R ["ID"]. tostring ();
Node. childnodes. Add (N );
Bindtree (DT, N, R ["ID"]. tostring ());
}
}

 

JS to get the value of the selected node and put it into two arrays respectively

 

VaR textarr = new array ();
VaR valuearr = new array ();
$ ("Input [type = 'checkbox']: checked"). Each (function (){
VaR TV = $ (this). ATTR ("title"). Split ("=>"); // The tooltip value above is very earthy.
Textarr. Push (TV [0]);
Valuearr. Push (TV [1]);
});

// Use join to convert the array into a string separated by "|" and fill in two text fields respectively.

$ Get ("catanam"). setattribute ("value", textarr. Join ("| "));
$ Get ("cataid"). setattribute ("value", valuearr. Join ("| "));

 

 

// When loading, use the recursive traversal tree to select the matching values

{

String [] cataidarray = row ["categoryid"]. tostring (). split (New String [] {"|"}, stringsplitoptions. removeemptyentries); // separate the values inserted into the database.
Checknode (treeview1.nodes, cataidarray );

}

// Recursive Method

Void checknode (treenodecollection tnodes, string [] cataidarray)
{
Foreach (treenode tn in tnodes)
{
For (INT I = 0; I <cataidarray. length; I ++)
{
If (TN. value = cataidarray. getvalue (I). tostring ())
{
Tn. Checked = true;
}
}
Checknode (TN. childnodes, cataidarray );
}
}

I beg the experts to help my younger brother give me some advice, because if there is a large amount of data, I am afraid I will not be able to afford it ....