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VSK98VSK98 

I couldn't able to get the child rows by using onrowselection action in lightning:treegrid

Hi All,

I am displaying the list of records with tree structure using TREEGRID tag in lightning. When the user selects the parent record using a checkbox, I able to get the parent record details in JS controller but I didn't get child records. 
Component:

<lightning:treeGrid  data="{!v.PaginationList}" columns="{!v.tablecolumns}" keyField="group_name"   resizeColumnDisabled="false" onrowaction="{! c.handleRowAction }" onrowselection = "{!c.getSelectedName}"/>
  
JS Controller:

getSelectedName: function(cmp, event, helper) {
    var selectedRows = event.getParam('selectedRows');

                              var name1 = '';
				var city1 = '';
				var street1= '';
				var country1= '';
				var CustomerId1 = '';
				var Assetcnt1 = '';
				var children1 = [];
    for (var i = 0; i < selectedRows.length; i++){
     
        name1 = selectedRows[i].group_name;
               city1 = selectedRows[i].City;
               street1 = selectedRows[i].Street;
               country1 = selectedRows[i].Country;	
               Assetcnt1 = selectedRows[i].Assetcnt;
               CustomerId1 = selectedRows[i].CustomerId;
               children1 = selectedRows[i]._children;           // getting undefined
}

As per my knowledge, the user didn't select the child records from UI, that why I couldn't get it. 

IS IT POSSIBLE  TO GET THE CHILD RECORDS WHEN THE USER SELECT THE  PARENT RECORD FROM UI.

Adv Thanks......

Regards,
VSK98