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Problem with DropDownList script error

Thread ID:





126082 Sep 22,2016 08:04 AM Sep 23,2016 07:58 AM JavaScript 1
Tags: ejDropDownList
jinchul oh
Asked On September 22, 2016 08:04 AM


Error: ejDropDownList: methods/properties can be accessed only after plugin creation

Bring up the simply dialog dropdownlist cascade error.


        <div class="cols-sample-area">
                <input class="e-btn" id="btnOpen" value="Click to open dialog" />
                <div class="control">
                    <div id="ajaxDialog">
    <script type="text/javascript">
        $(function () {
            // declaration
                   contentUrl: "Dialog.aspx",
                   contentType: "ajax",
                   title: "Twitter",
                   width: "90%",
                   height: "90%",
                   content: ".cols-sample-area",
                   close: "onDialogClose"
            $("#btnOpen").ejButton({ size: "medium", "click": "onOpen", type: "button", height: 30, width: 150 });

        function onDialogClose(args) {
        function onOpen() {

 <div class="row">
            <div class="">
                <div class="padding : 30px;">
<div class="cascadding">
                        <div id="control" >
<span class="txt">Select Group</span>
<input id="groupsList" type="text" />
                        <div id="binding">
<span class="txt">Select Country</span>
<input id="countryList" type="text" />

    <script type="text/javascript">
        var target;
        $(function () {
            // declaration
            var groups = [
          { parentId: 'a', text: "Group A" },
          { parentId: 'b', text: "Group B" },
          { parentId: 'c', text: "Group C" },
          { parentId: 'd', text: "Group D" },
          { parentId: 'e', text: "Group E" }]
            //first level child
            var countries = [{ value: 11, parentId: 'a', text: "Algeria", sprite: "flag-dz" },
           { value: 12, parentId: 'a', text: "Armenia", sprite: "flag-am" },
           { value: 13, parentId: 'a', text: "Bangladesh", sprite: "flag-bd" },
           { value: 14, parentId: 'a', text: "Cuba", sprite: "flag-cu" },
           { value: 15, parentId: 'b', text: "Denmark", sprite: "flag-dk" },
           { value: 16, parentId: 'b', text: "Egypt", sprite: "flag-eg" },
           { value: 17, parentId: 'c', text: "Finland", sprite: "flag-fi" },
           { value: 18, parentId: 'c', text: "India", sprite: "flag-in" },
           { value: 19, parentId: 'c', text: "Malaysia", sprite: "flag-my" },
           { value: 20, parentId: 'd', text: "New Zealand", sprite: "flag-nz" },
           { value: 21, parentId: 'd', text: "Norway", sprite: "flag-no" },
           { value: 22, parentId: 'd', text: "Poland", sprite: "flag-pl" },
           { value: 23, parentId: 'e', text: "Romania", sprite: "flag-ro" },
           { value: 24, parentId: 'e', text: "Singapore", sprite: "flag-sg" },
           { value: 25, parentId: 'e', text: "Thailand", sprite: "flag-th" },
           { value: 26, parentId: 'e', text: "Ukraine", sprite: "flag-ua" }]
                dataSource: groups,
                fields: { value: "parentId",text:"text" },
                cascadeTo: 'countryList',
                change: "onChange",
                dataSource: countries,
                enabled: false,
        function onChange() {
            var ctry = $('#countryList').data("ejDropDownList");

Thank you
Jinchul oh

Attachment: WebApplication1_6a618500.zip

Keerthana Rajendran [Syncfusion]
Replied On September 23, 2016 07:58 AM

Hi Jinchul,   
We had checked your shared sample. An issue occurs because you had referred the script files in both web pages (Dialog.aspx and webForm1.aspx) of your application. We suggest you to refer the required scripts and css only in the main page(WebForm1.aspx) where you render the dialog to resolve the issue.   
We had prepared a sample for your reference. Kindly refer the below given link:   



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