Hello All,
Can anyone tell me what event to be fired when the node is expanded.
Initially I would be binding only the first level nodes on page load. I would want the child levels to be bound only on expanding the nodes. I tried events like : BeforeExpand, Expand, AfterItemExpand. But it didn't work.
Hi @ArjunVasisht,
Welcome to the Ext.NET forums!
A TreePanel's BeforeLoad event could be used.
https://examples2.ext.net/#/TreePane.../Direct_Method
There are alternative ways as well.
https://examples2.ext.net/#/TreePanel/Loaders/Page
https://examples2.ext.net/#/TreePane.../Using_Handler
https://examples2.ext.net/#/TreePane...ers/WebService
hanks Daniil,
BeforeLoad event did work for me. But I am also using drag and drop functionality.
If I drag and drop a row before expanding the node, the row is not binding.
But if a drag and drop a row on an already expanded folder then it works.
I am using direct method approach to bind the node in the code behind.
I want the logic inside BeforeDrop event of a treeview to be done after the functionality inside BeforeLoad event is done. How do I do that.
Code:<View>
<ext:TreeView ID="TreeView1" runat="server">
<Plugins>
<ext:TreeViewDragDrop ID="TreeViewDragDrop1" runat="server" DragGroup="tree2grid" DropGroup="grid2tree" />
</Plugins>
<Listeners>
<BeforeDrop Fn="beforerecorddrop" />
</Listeners>
</ext:TreeView>
</View>
Could you, please, provide a full test case and exact steps to reproduce the issue?
Hi Daniil, Please find the test case below:
The child nodes of the tree grid are loaded only when the parent node is clicked. Now the user directly drags and drops a value from the above grid on a closed folder in the tree grid. Then the the value is not moved.
But it works when the data is dragged and dropped on a folder which is already opened.
Code:<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="CustomToDaniil.aspx.cs" Inherits="Honeywell.Ap3.WebApp.Pages.Views.CustomToDaniil" %>
<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>
<!DOCTYPE html>
<script runat="server">
private object[] TestData
{
get
{
DateTime now = DateTime.Now;
return new object[]
{
new object[] { "3m Co", 71.72, 0.02, 0.03, now },
new object[] { "Alcoa Inc", 29.01, 0.42, 1.47, now },
new object[] { "Altria Group Inc", 83.81, 0.28, 0.34, now },
new object[] { "American Express Company", 52.55, 0.01, 0.02, now },
new object[] { "American International Group, Inc.", 64.13, 0.31, 0.49, now },
new object[] { "AT&T Inc.", 31.61, -0.48, -1.54, now },
new object[] { "Boeing Co.", 75.43, 0.53, 0.71, now },
new object[] { "Caterpillar Inc.", 67.27, 0.92, 1.39, now },
new object[] { "Citigroup, Inc.", 49.37, 0.02, 0.04, now },
new object[] { "E.I. du Pont de Nemours and Company", 40.48, 0.51, 1.28, now },
new object[] { "Exxon Mobil Corp", 68.1, -0.43, -0.64, now },
new object[] { "General Electric Company", 34.14, -0.08, -0.23, now },
new object[] { "General Motors Corporation", 30.27, 1.09, 3.74, now },
new object[] { "Hewlett-Packard Co.", 36.53, -0.03, -0.08, now },
new object[] { "Honeywell Intl Inc", 38.77, 0.05, 0.13, now },
new object[] { "Intel Corporation", 19.88, 0.31, 1.58, now },
new object[] { "International Business Machines", 81.41, 0.44, 0.54, now },
new object[] { "Johnson & Johnson", 64.72, 0.06, 0.09, now },
new object[] { "JP Morgan & Chase & Co", 45.73, 0.07, 0.15, now },
new object[] { "McDonald\"s Corporation", 36.76, 0.86, 2.40, now },
new object[] { "Merck & Co., Inc.", 40.96, 0.41, 1.01, now },
new object[] { "Microsoft Corporation", 25.84, 0.14, 0.54, now },
new object[] { "Pfizer Inc", 27.96, 0.4, 1.45, now },
new object[] { "The Coca-Cola Company", 45.07, 0.26, 0.58, now },
new object[] { "The Home Depot, Inc.", 34.64, 0.35, 1.02, now },
new object[] { "The Procter & Gamble Company", 61.91, 0.01, 0.02, now },
new object[] { "United Technologies Corporation", 63.26, 0.55, 0.88, now },
new object[] { "Verizon Communications", 35.57, 0.39, 1.11, now },
new object[] { "Wal-Mart Stores, Inc.", 45.45, 0.73, 1.63, now }
};
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (!X.IsAjaxRequest)
{
this.Store1.DataSource = this.TestData;
this.Store1.DataBind();
}
}
[DirectMethod]
public static string NodeLoad(string nodeID)
{
NodeCollection nodes = new Ext.Net.NodeCollection();
if (!string.IsNullOrEmpty(nodeID))
{
for (int i = 1; i < 6; i++)
{
Node asyncNode = new Node();
asyncNode.Text = nodeID + i;
asyncNode.NodeID = nodeID + i;
nodes.Add(asyncNode);
}
for (int i = 6; i < 11; i++)
{
Node treeNode = new Node();
treeNode.Text = nodeID + i;
treeNode.NodeID = nodeID + i;
treeNode.Leaf = true;
nodes.Add(treeNode);
}
}
return nodes.ToJson();
}
</script>
<!DOCTYPE html>
<html>
<head id="Head1" runat="server">
<title>Drag and Drop from GridPanel to TreePanel - Ext.NET Examples</title>
<link href="/resources/css/examples.css" rel="stylesheet" />
<script>
var beforerecorddrop = function (node, data, overModel, dropPosition, dropFn) {
if (Ext.isArray(data.records)) {
var records = data.records,
rec;
data.records = [];
for (var i = 0; i < records.length; i++) {
rec = records[i];
data.records.push({
text: rec.get("company"),
leaf: true,
price: rec.get("price"),
change: rec.get("change"),
pctChange: rec.get("pctChange"),
qtip: rec.get("lastChange")
});
rec.stores[0].remove(rec);
}
return true;
}
};
var beforenodedrop = function (node, data, overModel, dropPosition, dropFn) {
if (Ext.isArray(data.records)) {
var records = data.records,
rec;
data.records = [];
for (var i = 0; i < records.length; i++) {
rec = records[i];
data.records.push(this.store.createModel({
company: rec.get("text"),
price: rec.get("price"),
change: rec.get("change"),
pctChange: rec.get("pctChange"),
lastChange: rec.get("qtip")
}));
rec.remove(true);
}
return true;
}
};
var nodeLoad = function (store, operation, options) {
var node = operation.node;
App.direct.NodeLoad(node.getId(), {
success: function (result) {
node.set('loading', false);
node.set('loaded', true);
var data = Ext.decode(result);
node.appendChild(data, undefined, true);
node.expand();
},
failure: function (errorMsg) {
Ext.Msg.alert('Failure', errorMsg);
}
});
return false;
};
</script>
</head>
<body>
<form id="Form1" runat="server">
<ext:ResourceManager ID="ResourceManager1" runat="server" />
<ext:Panel ID="Panel1"
runat="server"
Width="700"
Height="800"
Layout="BorderLayout">
<Items>
<ext:GridPanel ID="GridPanel1"
runat="server"
Region="North"
Title="Grid"
MultiSelect="true"
Margins="5 0 5 5">
<Store>
<ext:Store
ID="Store1"
runat="server">
<Model>
<ext:Model ID="Model1" runat="server">
<Fields>
<ext:ModelField Name="company" />
<ext:ModelField Name="price" Type="Float" />
<ext:ModelField Name="change" Type="Float" />
<ext:ModelField Name="pctChange" Type="Float" />
<ext:ModelField Name="lastChange" Type="Date" />
</Fields>
</ext:Model>
</Model>
</ext:Store>
</Store>
<ColumnModel ID="ColumnModel1" runat="server">
<Columns>
<ext:Column ID="Column1"
runat="server"
Text="Company"
Sortable="true"
DataIndex="company"
Flex="1" />
<ext:Column ID="Column2"
runat="server"
Text="Price"
Width="75"
Sortable="true"
DataIndex="price">
<Renderer Format="UsMoney" />
</ext:Column>
</Columns>
</ColumnModel>
<View>
<ext:GridView ID="GridView1" runat="server">
<Plugins>
<ext:GridDragDrop ID="GridDragDrop1" runat="server" DragGroup="grid2tree" DropGroup="tree2grid" />
</Plugins>
<Listeners>
<BeforeDrop Fn="beforenodedrop" />
</Listeners>
</ext:GridView>
</View>
</ext:GridPanel>
<ext:TreePanel
ID="TreePanel1"
runat="server"
Title="Tree"
Width="300"
Height="450"
Border="false" Region="South">
<Root>
<ext:Node NodeID="0" Text="Root" />
</Root>
<Listeners>
<BeforeLoad Fn="nodeLoad" />
</Listeners>
<SelectionModel>
<ext:TreeSelectionModel ID="TreeSelectionModel1" runat="server" />
</SelectionModel>
<View>
<ext:TreeView ID="TreeView1" runat="server">
<Plugins>
<ext:TreeViewDragDrop ID="TreeViewDragDrop1" runat="server" DragGroup="tree2grid" DropGroup="grid2tree" />
</Plugins>
<Listeners>
<%-- <Drop Fn="beforerecorddrop"></Drop>--%>
<BeforeDrop Fn="beforerecorddrop" />
</Listeners>
</ext:TreeView>
</View>
</ext:TreePanel>
</Items>
</ext:Panel>
</form>
</body>
</html>
Thank you for the test case. Yes, that is a problem in Ext.NET v2.
Basing on this Sencha forum post I can say that it should be fixed in Ext.NET 3 which is based on ExtJS 4.
https://www.sencha.com/forum/showthr...l=1#post906736
So, is there a specific reason to use Ext.NET v2 rather than v3?