nodePopulating is not calling in UI for ASP.NET AJAX

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nodePopulating is not calling

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TreeView

This is a migrated thread and some comments may be shown as answers.

Mahmood Ahmad Tahir asked on 02 Oct 2009, 11:59 AM

Hi,

Im using treeview control in MVC through client side binding and client side method which is assigned to OnClientNodePopulating event, is not calling.

following is the asp.net code

<telerik:RadTreeView runat="server" ID="RadTreeView1" DataTextField="SearchKeyword"

DataValueField="id" LoadingStatusPosition="AfterNodeText" OnClientNodePopulating="nodePopulating" >

<telerik:RadTreeNodeBinding Depth="0" ExpandMode="WebService" />

</DataBindings>

</telerik:RadTreeView>

client side code:

function onSuccess(result, node) {

debugger;

node.hideLoadingStatus();

//the result in JSON format is available as a "d" field

var data = result.d;

//Traverse the array of objects and create combobox items

for (var i = 0; i < data.length; i++) {

var dataItem = data[i];

var childNode = new Telerik.Web.UI.RadTreeNode();

childNode.set_text(dataItem.Text);

childNode.set_value(dataItem.id);

childNode.set_expandMode(Telerik.Web.UI.TreeNodeExpandMode.WebService);

node.get_nodes().add(childNode);

}

node.set_expandMode(Telerik.Web.UI.TreeNodeExpandMode.ClientSide);

node.expand();

}

function nodePopulating(sender, args) {

debugger;

var node = args.get_node();

node.showLoadingStatus(sender.get_loadingMessage(), sender.get_loadingStatusPosition());

//get only the child nodes of the current node

var filter = "&$filter=parentId eq " + node.get_value();

//Call the ADO.NET Data Service

$telerik.$.ajax({

type: "GET", // HTTP method

url: '<%= ResolveUrl("TreeViewAdoNetService.svc/Links?") %>' + filter, // ADO.NET DataService URL

contentType: "application/json; charset=utf-8", //request the result to be in JSON

dataType: "json",

success: function(result) { //callback method to invoke when the request is complete

onSuccess(result, node);

}

});

args.set_cancel(true);

}

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