Bind a Treeview tree

 

I:

Effect

<Form ID = "form1" runat = "server">
<Asp: Treeview id = "treeview1" runat = "server" Height = "300px" width = "200px" selectaction = "Expand">
</ASP: Treeview>
</Form>

 

Protected void page_load (Object sender, eventargs E)
{
If (! This. ispostback)
{
String where = "and com_istrue = 0 and com_status = 2 ";
Bdtree (where );
}
}

Private list <t_commoditytype> List = new list <t_commoditytype> ();
Private void bdtree (string where)
{
List = BLL. getmodellist (where );
Addtree ("", null );
}

Public void addtree (string parentid, treenode pnode)
{
If (list. Where (O => O. com_parentid.tostring (). Equals (parentid). Count () = 0)
Return;
List <t_commoditytype> clist = List. Where (O => O. com_parentid.tostring (). Equals (parentid). tolist ();
Foreach (t_commoditytype DC in clist)
{
Treenode node = new treenode ();
If (pnode = NULL)
{
Node. value = Dc. com_id.tostring ();
Node. Text = Dc. com_name;
Node. navigateurl = "javascript: saveseldata ('" + node. Text + "', '" + node. Value + "');";
Treeview1.nodes. Add (node );
Addtree (DC. com_id.tostring (), node );
}
Else
{
Node. value = Dc. com_id.tostring ();
Node. Text = Dc. com_name;
Node. navigateurl = "javascript: saveseldata ('" + node. Text + "', '" + node. Value + "');";
Pnode. childnodes. Add (node );
Addtree (DC. com_id.tostring (), node );
}
}
}

II:

 

Click "Fruit"

 

<Div>
<Asp: Treeview id = "treeview1" runat = "server" Height = "300px" width = "200px" selectaction = "Expand"
Showcheckboxes = "all" onselectednodechanged = "treeview?selectednodechanged" onLoad = "treeview#load">
</ASP: Treeview>
</Div>

 

 

Protected void page_load (Object sender, eventargs E)
{
If (! Ispostback)
{
Bdtree ();
}
}
Private list <t_commoditytype> List = new list <t_commoditytype> ();
Private void bdtree ()
{
List = BLL. getmodellist ("and com_istrue = 0 and com_status = 2 ;");
Addtree ("00000000-0000-0000-0000-000000000000", null );
}
Public void addtree (string parentid, treenode pnode)
{
If (list. Where (O => O. com_parentid.tostring (). Equals (parentid). Count () = 0)
Return;
List <t_commoditytype> clist =
List. Where (O => O. com_parentid.tostring (). tolower (). Equals (parentid. tolower (). tolist ();
Foreach (t_commoditytype DC in clist)
{
Treenode node = new treenode ();
If (pnode = NULL)
{
Node. value = Dc. com_id.tostring ();
Node. Text = Dc. com_name;
Node. showcheckbox = true;
Treeview1.nodes. Add (node );
Addtree (DC. com_id.tostring (), node );
}
Else
{
Node. value = Dc. com_id.tostring ();
Node. Text = Dc. com_name;
Node. showcheckbox = true;
// Node. selectaction = treenodeselectaction. selectexpand;
Pnode. childnodes. Add (node );
Addtree (DC. com_id.tostring (), node );
}

}
}
Protected void treeview1_selectednodechanged (Object sender, eventargs E)
{
If (treeview1.selectednode. Checked)
{
Treeview1.selectednode. Checked = false;
If (treeview1.selectednode. childnodes. Count> 0)
{
Foreach (treenode N in treeview1.selectednode. childnodes)
{
N. Checked = true;
}
}
Return;
}
Treeview1.selectednode. Checked = true;

If (treeview1.selectednode. childnodes. Count> 0)
{
Foreach (treenode N in treeview1.selectednode. childnodes)
{
N. Checked = true;
}
}
If (treeview1.selectednode. parent! = NULL)
{
// Treeview1.selectednode. Parent. Checked = true;
}
}

 

Protected void treeview1_load (Object sender, eventargs E)
{
If (! Object. Equals (null, treeview1.selectednode ))
{
Treeview1.selectednode. Select ();
Treeview1.selectednode. Selected = false;
}
}

Bind a Treeview tree