I am using igTree with LoadOnDemand is set to true.
I have a WCF REST Service which giving me data to populate in igTree.
Please find the sample code..
$.ajax(
{
type: "GET",
url: "AssessmentProcWCFService.svc/GetAllEntities",
contentType: "application/json; charset=utf-8",
dataType: 'json',
data: '{}',
cache: false,
success: OnGetAllEntitiesSuccess,
error: OnGetAllEntitiesFailure
});
==================================================
function OnGetAllEntitiesSuccess(categoryList) {
$("#APTreeView").igTree({
animationDuration: 0,
dataSourceType: 'json',
dataSource: categoryList.d,
initialExpandDepth: false,
loadOnDemand: true,
dataSourceUrl: "AssessmentProcWCFService.svc/GetAllCategories?EntityID=primaryKey:id",
bindings: {
textKey: 'text',
valueKey: 'id',
primaryKey: 'id',
expanded: 'expanded',
childDataProperty: 'children'
}
=========================================================
Questions:-
1. How could I send the selected node ID to the Service when any node of the tree is expanding?
The way I am sending in the above example it is not working when I am retrieving it in the service “public List<APEntityTree> GetAllCategories()” like
“string entityID = HttpContext.Current.Request.QueryString["EntityID"];”
I am getting entity id as null.
2. How the tree get rendered when any node get expanded if LoadOnDemand is true?
Please help me on this I have spend lot of time in it.
Hi there,
You are able to do this but it is not supported out of the box. What you would need to do further is to subscribe to the nodePopulating event and change the dataSourceUrl at runtime to reflect the EntityID that you're requesting. The node populating event exposes for you the node currently being populated so you can extract its primary key from the event arguments.
Let me know if this helps!
how do i set the "dataSourceUrl" inside the
$(document).delegate(
"#APTreeView", "igtreenodepopulating", function (evt, ui) {
Please let me know the child node will get rendered automatically after expand?
Hi sandy_joggy,
If you need further assistance with this case do not hesitate to contact us.
Thank you.
Sincerely,
Georgi Sashev
Developer Support Engineer
Infragistics, Inc.
http://ko.infragistics.com/support
Hi,
Can i have a sample of infragistics igSlider with thumbnails and tick mark.
Thanks
Team Symantec.
Hello sandy_joggy,
Can you open a new theme in our forums regarding your last question in the respective area.
In the tree how could i select the first node of the tree by default, when the tree render first time?
Anil
Hi Anil,
Subscribe to the rendered event and create a flag for yourself to indicate whether this the first time rendered is being fired. Then inside the rendered event select the first node.
It should look like this:
var initialRender = true;
$(document).delegate('#APTreeView', 'igtreerendered', function (event, ui) {
if (initialRender) {
// Below will retrieve first node regardless of whether you have primary keys or not.
var node = $('#APTreeView').find('li[data-role=node]:first');
$('#APTreeView').igTree('select', node);
initialRender = false;
Thank you for using the Infragistics forums!
Hello Sandy,
I as looking at your post and tried to reproduce the behavior that you experience.
I encountered the same issue when load on demand is enabled.
As Konstantin supposed, the nodesByValue is not returning a node element to you because the node is still not loaded.
I am attaching a sample with two igTrees (the second with LoadOnDemand) to see the difference.
Once the node is loaded on the client, select and expandToNode methods works as expected.
Hope this helps
Hey again,
I thought of something. Could you make sure that nodesByValue is returning a node element to you. Check whether node.length > 0 && node.length === 1.
Thanks,
Konstantin
Can you provide me with a small sample that reproduces the issue. I can help you further if I have that.
already did that still no luck.
Hi there.
You need to pass the node element into those functions not the node object. No need to call nodeFromElement on it. It would work if you remove that line :)