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 again,
If the node ID is the node value then you can use the nodesByValue method to find it, call select with it and expandToNode. Otherwise use the findNodesByText and find it by text and then expandToNode and select.
Let me know if this works!
Hi,
I ahve already done that as below, but still the tree is not getting expanded.
Any thoughts on this why it is not getting expanded.
var targetNode = categoryList.d.CreatedNode; var node = $('APTreeView').igTree("nodesByValue", targetNode.id); node = $('#APTreeView').igTree('nodeFromElement', node); $('APTreeView').igTree('select', node); $('APTreeView').igTree('expandToNode', node);
Thanks
Team Symantec
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 :)
already did that still no luck.
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