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How to get Child Component value from Parent component in JS controller?

Discussion in 'Programming/Internet' started by DOMINIC EDWARD, Oct 8, 2018.

  1. Child Component - SearchBarCmp.cmp

    <aura:component >
    <input type="text" class="form-control" onchange="{!c.searchKeyChange}"
    placeholder="Search" id="SearchKeyValue"/>

    Child JS Controller - SearchBarCmpController.js

    searchKeyChange: function(component, event, helper) {
    var myEvent = $A.get("e.c:SearchKeyChange");
    myEvent.setParams({"searchKey": event.target.value});

    Event - SearchKeyChange.evt

    <aura:event type="APPLICATION">
    <aura:attribute name="searchKey" type="String"/>

    Parent Component

    <aura:component controller="SampleController">
    <aura:handler event="c:SearchKeyChange" action="{!c.searchKeyChange}"/>
    <div class="slds-col slds-align-bottom" style="margin-top:10px">
    <c:SearchBarCmp aura:id="SearchCmp"/>
    <button class="slds-button slds-button--icon-inverse slds-notify__close" onclick="{!c.GetWrapperValues}">

    Parent JS Controller

    searchKeyChange : function(component, event, helper){
    var SearchKey = event.getParam("searchKey");
    //SearchKey provides the value of child component ie)SearchBarCmp.cmp input field value
    GetWrapperValues :function(component, event, helper){
    //How to get the value from child component in this JS controller??

    How to get the value from child component in this JS controller GetWrapperValues ??

    Suggestions Please

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