Hello,
I have a treeview control, when i select a item i navigate to url. But
selected node is lost, it reset itself, loosing state.
I post my code here. Thanks in advance.
<script language="javas cript">
var selectedPageId = 1;
function OnPageClick(pag eId)
{
selectedPageId = pageId;
parent.location = "default.aspx?i d="+pageId;
}
<%=javascript %>
</script>
<asp:TreeView ID="SubMenuTree " EnableClientScr ipt="true"
EnableViewState ="true" ExpandDepth="1"
OnSelectedNodeC hanged="nodeSel ect" OnTreeNodePopul ate="PopulateNo de"
runat="server" ImageSet="XPFil eExplorer" NodeIndent="15" >
<ParentNodeStyl e Font-Bold="False" />
<HoverNodeSty le Font-Underline="True " ForeColor="#666 6AA" />
<SelectedNodeSt yle BackColor="#B5B 5B5" Font-Underline="Fals e"
HorizontalPaddi ng="0px"
VerticalPadding ="0px" />
<NodeStyle Font-Names="Tahoma" Font-Size="8pt" ForeColor="Blac k"
HorizontalPaddi ng="2px"
NodeSpacing="0p x" VerticalPadding ="2px" />
<Nodes>
<asp:TreeNode Text="Root" SelectAction="S elect"
PopulateOnDeman d="True" Value="0"/>
</Nodes>
</asp:TreeView>
protected void PopulateNode(Ob ject sender, TreeNodeEventAr gs
e)
{
// Call the appropriate method to populate a node at a
particular level.
switch (e.Node.Depth)
{
case 0:
// Populate the first-level nodes.
PopulateTopLeve lNodes(e.Node);
break;
case 1:
// Populate the second-level nodes.
PopulateChilder n(e.Node);
break;
default:
// Do nothing.
break;
}
}
private void PopulateTopLeve lNodes(TreeNode node)
{
Selago.Business Layer.Service service = new
Selago.Business Layer.Service() ;
PageList = service.GetPage s();
foreach(iPage page in PageList)
{
if(page.ParentI D == 0)
{
TreeNode TopLevel = new TreeNode();
TopLevel.Text = page.PageName;
TopLevel.Value = page.ID.ToStrin g();
// Add root node to TreeView
TopLevel.Popula teOnDemand = true;
TopLevel.Select Action =
TreeNodeSelectA ction.SelectExp and;
node.ChildNodes .Add(TopLevel);
}
}
}
private void PopulateChilder n(TreeNode node)
{
Selago.Business Layer.Service service = new
Selago.Business Layer.Service() ;
ChildrenList =
service.GetChil drenPages(Int32 .Parse(node.Val ue));
foreach (iPage page in ChildrenList)
{
TreeNode newNode = new TreeNode();
newNode.Text = page.PageName;
newNode.Value = page.ID.ToStrin g();
// Set additional properties for the node.
newNode.SelectA ction =
TreeNodeSelectA ction.SelectExp and;
// Add the new node to the ChildNodes collection of
the parent node.
node.ChildNodes .Add(newNode);
DataSet ChildrensSub = new DataSet();
int ChildrensSubCou nt =
service.GetChil drenPages(Int32 .Parse(newNode. Value)).Count;
if (ChildrensSubCo unt 0)
{
PopulateChilder n(newNode);
}
}
}
protected void nodeSelect(obje ct sender, EventArgs e)
{
javascript = "OnPageClic k(" +
SubMenuTree.Sel ectedNode.Value + ");";
}
