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[CLOSED] TreePanel Refresh server side

  1. #1
    Feb 12, 2014, 8:13 AM

    [CLOSED] TreePanel Refresh server side

    Hi,
    I'm building a page to filter a treepanel server side.

    Clicking on a button server side, I populate the tree with the following code:

    
//remove old nodes
            TreeFunctional.Root.Clear();

            var q = from myrow in dt.AsEnumerable()
                    where !myrow.Field<int?>("ID_INV_REGISTRY_PARENT").HasValue
                    select 
                        new
                        {
                            Description = myrow.Field<string>("Description")
                        ,   ID_INV_REGISTRY = myrow.Field<int?>("ID_INV_REGISTRY")
                        };
//load new nodes in the tree
            foreach (var r in q)
            {
                Ext.Net.Node root = new Ext.Net.Node()
                {
                    Text = r.Description
                };


                root.CustomAttributes.Add(new ConfigItem("ID_INV_REGISTRY", Convert.ToString(r.ID_INV_REGISTRY)));


                root.Children.AddRange(GetFunctionalChildNodes(dt, r.ID_INV_REGISTRY.Value));


                root.Expandable = root.Expanded = (root.Children.Count > 0);


                TreeFunctional.Root.Add(root);
            }
//render the content of the tree
            TreeFunctional.Render();
    The treepanel is inside an accordion panel.

    After I run this code, the treepanel stay clear without nodes, if I collapse and expand the treepanel inside the accordion panel, then I can see all the nodes in the tree.

    I used the TreeFunctional.Render() method to render the treepanel after I populate it, but it seems to be not enough, so what method should I use to refresh the tree?

    Thank you for your help.

    Have a good day.
    Last edited by Daniil; Feb 12, 2014 at 1:27 PM. Reason: [CLOSED]
  2. #2
    Feb 12, 2014, 12:41 PM
    Hi @John_Writers,

    I cannot reproduce with this sample.

    Example
    <%@ Page Language="C#" %>

<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>

<script runat="server">
    protected void Refresh(object sender, DirectEventArgs e)
    {
        this.TreePanel1.Root.Clear();
        this.TreePanel1.Root.Add(new Node()
        {
            Text = "Root " + DateTime.Now.Second,
            Children =
            {
                new Node()
                {
                    Text = "Child " + DateTime.Now.Second,
                    Leaf = true
                }
            }

        });
        this.TreePanel1.Render();
    }
</script>

<!DOCTYPE html>
<html>
<head runat="server">
    <title>Ext.NET v2 Example</title>
</head>
<body>
    <form runat="server">
        <ext:ResourceManager runat="server" />

        <ext:Button runat="server" Text="Refresh" OnDirectClick="Refresh" />

        <ext:Panel 
            ID="Panel1"
            runat="server" 
            Width="300" 
            Height="400" 
            Layout="AccordionLayout">
            <Items>
                <ext:TreePanel ID="TreePanel1" runat="server">
                    <Root>
                        <ext:Node Text="Initial Root">
                            <Children>
                                <ext:Node Text="Initial Child" Leaf="true" />
                            </Children>
                        </ext:Node>
                    </Root>
                </ext:TreePanel>
            </Items>
        </ext:Panel>                
    </form>
</body>
</html>
  3. #3
    Feb 12, 2014, 1:02 PM
    Hum,
    is quite the same I did..

    Anyway, I solved calling the Render Method on the parent panel with accordion layout..

    Thank you for your time!

    Have a good day!

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