Mar 26, 2015, 8:27 AM
[CLOSED] Javascript tree error
I am loading a treepanel using javascript but I am getting the following error when I want to expand.
JavaScript runtime error: Unable to get property 'style' of undefined or null reference
Here is the html part
JavaScript runtime error: Unable to get property 'style' of undefined or null reference
Here is the html part
<%@ Page Language="vb" AutoEventWireup="false" CodeFile="TreeView.aspx.vb" Inherits="TreeView" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<script type="text/javascript">
function nodeLoadSt(parent) {
var more = false;
if (parent.firstChild != null) {
return;
}
var found = false;
for (var i = 0, len = App.stMenu.data.length; i < len; i++) {
if (parent.lastOptions.id == App.stMenu.data.items[i].data.IDParent) {
found = true;
for (var k = 0, leng = App.stMenu.data.length; k < leng; k++) {
if (App.stMenu.data.items[i].data.IDClient == App.stMenu.data.items[k].IDParent) {
more = true;
};
};
if (more == true) {
more = false;
var store = App.treeSt.getStore(), node = store.getNodeById(parent.lastOptions.id);
node.appendChild({
text: App.stMenu.data.items[i].data.Client,
id: App.stMenu.data.items[i].data.IDClient,
expandable: true
})
}
else {
var store = App.treeSt.getStore(), node = store.getNodeById(parent.lastOptions.id);
node.appendChild({
text: App.stMenu.data.items[i].data.Client,
id: App.stMenu.data.items[i].data.IDClient,
expandable: false,
leaf: true
})
};
}
}
if (found == true) {
node.expand()
};
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<ext:ResourceManager ID="ScriptManager1" Theme="Gray" Locale="en-GB" runat="server">
</ext:ResourceManager>
<ext:Store ID="stMenu" runat="server" Data="<%# TestData %>" AutoDataBind="true">
<Model>
<ext:Model ID="Model1" runat="server">
<Fields>
<ext:ModelField Name="IDParent" />
<ext:ModelField Name="IDClient" />
<ext:ModelField Name="Client" />
</Fields>
</ext:Model>
</Model>
<Reader>
<ext:ArrayReader />
</Reader>
</ext:Store>
<ext:TreePanel Border="false" StyleSpec="margin-top: 30px" ID="treeSt" runat="server"
Width="270" AutoHeight="true" Animate="true" TitleCollapse="true" AutoScroll="true"
Collapsible="true" Collapsed="false" CollapseFirst="true">
<Root>
<ext:Node Expandable="True" NodeID="0" Text="Root">
</ext:Node>
</Root>
<Listeners>
<BeforeLoad Fn="nodeLoadSt" />
</Listeners>
</ext:TreePanel>
</div>
</form>
</body>
</html>Public Class TreeView
Inherits System.Web.UI.Page
Public ReadOnly Property TestData() As Object
Get
Return New Object() {New Object() {"0", "1", "Main"}, New Object() {"1", "2", "Layer1_0"}, New Object() {"1", "3", "Layer1_1"}, New Object() {"1", "4", "Layer1_3"}, New Object() {"2", "5", "Layer2_0"}, New Object() {"2", "6", "Layer2_1"}}
End Get
End Property
End Class
Last edited by Daniil; Mar 26, 2015 at 1:11 PM.
Reason: [CLOSED]
