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[CLOSED] Access TreeGrid nodes from DirectEvent handler

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  1. #1
    Jun 24, 2010, 9:00 PM

    [CLOSED] Access TreeGrid nodes from DirectEvent handler

    I have a direct event handler that needs to iterate through the nodes that are in a TreeGrid, but when I inspect TheGrid.Root, it's empty. Is there something special I need to do to be able to get to those nodes?
  2. #2
    Jun 25, 2010, 1:28 PM

    RE: [CLOSED] Access TreeGrid nodes from DirectEvent handler

    Hello, jmcantrell!

    Please look at the example.

    <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Access TreeGrid nodes from DirectEvent.aspx.cs"
    Inherits="Work.Premium_help.Access_TreeGrid_nodes_from_DirectEvent" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
    protected void Button_Click(object sender, EventArgs args)
    {
        X.MessageBox.Alert("TheGrid.Root", TheGrid.Root.ToString()).Show();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <ext:ResourceManager runat="server">
    </ext:ResourceManager>
    <ext:TreeGrid ID="TheGrid" runat="server">
        <Columns>
            <ext:TreeGridColumn Header="Column" Width="100">
            </ext:TreeGridColumn>
        </Columns>
        <Root>
            <ext:TreeNode>
            </ext:TreeNode>
        </Root>
    </ext:TreeGrid>
    <ext:Button runat="server" Text="Click to show the TheGrid.Root">
        <DirectEvents>
            <Click OnEvent="Button_Click" />
        </DirectEvents>
    </ext:Button>
</body>
</html>
    Please note the Root is not empty in this example.
    So, could you provide me with your example where the Root is empty.

  3. #3
    Jun 25, 2010, 1:47 PM

    RE: [CLOSED] Access TreeGrid nodes from DirectEvent handler


  4. #4
    Jun 25, 2010, 1:57 PM

    RE: [CLOSED] Access TreeGrid nodes from DirectEvent handler

    i assume when you are saying tree.Root you are actually inspecting tree.root (lower case) right?

    otherwise i have this same thing in my code and it works (unless it broke with an update?)

                    tree.root.eachChild
                (
                    function fn(node) {
                        //do something
                    }
                );
    I dont have my root visible either so i would think that shouldn't be an issue?
  5. #5
    Jun 25, 2010, 2:30 PM

    RE: [CLOSED] Access TreeGrid nodes from DirectEvent handler

    Hello, bryantharpe!

    I think he means the accessing the Root in a code behind. He uses the DirectEvent.
    Today I updated from the SVN repository and it stiil works fine.
  6. #6
    Jun 25, 2010, 2:35 PM

    RE: [CLOSED] Access TreeGrid nodes from DirectEvent handler

    oh right! small details.. lol
  7. #7
    Jun 25, 2010, 2:51 PM

    RE: [CLOSED] Access TreeGrid nodes from DirectEvent handler

    Anything is possible:)
  8. #8
    Jun 28, 2010, 2:50 PM

    RE: [CLOSED] Access TreeGrid nodes from DirectEvent handler

    This should not be marked as solved. See my code below...

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>


    <script runat="server">
        
        Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
            If Not IsPostBack And Not Ext.Net.X.IsAjaxRequest Then
                BuildTree(TheGrid.Root)
            End If
        End Sub


        Protected Function BuildTree(ByVal nodes As Ext.Net.TreeNodeCollection) As Ext.Net.TreeNodeCollection
            If nodes Is Nothing Then nodes = New Ext.Net.TreeNodeCollection


            Dim root As New Ext.Net.TreeNode("Root")
            nodes.Add(root)


            For i = 1 To 10
                Dim node As New Ext.Net.TreeNode("Test " &amp; i)
                node.CustomAttributes.Add(New Ext.Net.ConfigItem("foo", CStr(i), Ext.Net.ParameterMode.Value))
                root.Nodes.Add(node)
            Next


            Return nodes
        End Function


        Public Sub PrintButton_Click(ByVal sender As Object, ByVal e As Ext.Net.DirectEventArgs)
            Dim x = TheGrid.Root.Count '<== This is zero
        End Sub


    </script>


</head>
<body>
    <form id="form1" runat="server">
    
        <ext:ResourceManager runat="server" />
        <ext:Panel ID="grid" runat="server" Layout="Card" ActiveIndex="0" Border="false">
            <TopBar>
                <ext:Toolbar ID="Toolbar1" runat="server">
                    <Items>
                        <ext:Button ID="btnPrint" runat="server" Text="Print" Icon="Printer">
                            <DirectEvents>
                                <Click OnEvent="PrintButton_Click">
                                    <ExtraParams>
                                        <ext:Parameter Name="Type" Value="PDF" />
                                    </ExtraParams>
                                </Click>
                            </DirectEvents>
                        </ext:Button>
                    </Items>
                </ext:Toolbar>
            </TopBar>
            <Items>
                <ext:TreeGrid ID="TheGrid" runat="server" Border="false" NoLeafIcon="true">
                    <Columns>
                        <ext:TreeGridColumn Header="Foo" Width="150" DataIndex="foo" />
                    </Columns>
                </ext:TreeGrid>
            </Items>
        </ext:Panel>
    

    </form>
</body>
</html>
  9. #9
    Jun 28, 2010, 3:21 PM

    RE: [CLOSED] Access TreeGrid nodes from DirectEvent handler

    Hello, jmcantrell!

    If you want to access to the columns in the TreeGrid class please use the TheGrid.Columns property. Not the TheGrid.Root.
    So, there is no any <Root> in your TreeGrid and it's no strange that the TreeGrid.Root is null.

    I didn't adapt to this class at once, also as you:)
  10. #10
    Jun 28, 2010, 3:31 PM

    RE: [CLOSED] Access TreeGrid nodes from DirectEvent handler

    I'm trying to get access to the nodes, and there is a root, it's just defined in the code behind, not the markup.
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