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How can I transfer data from the dialog box to the parent window?

lulu50 asked
Last Modified: 2019-12-11

How can I transfer data from the dialog box to the parent window?

I need your help.

I have a parent window and a popup window

1. user open popup window
2. the popup window has a textarea
3. the values that are in the textarea needs to go back to the parent textarea.

I don't know what I'm doing wrong.

Text area in the parent window: 

 @Html.TextArea("ConditionAttributesAndValues", new { @class = "form-control", @style = "width:77%" })

My dialog box in the parent window:

$(function () {
                autoOpen: false,
                width: 950,
                resizable: true,
                title: 'Condition',
                modal: true,
                open: function(event, ui) {
                    $(this).load("@Url.Action("RulePartialView", "CareAdvanceBusinessRules")")
                buttons: {
                    "Close": function () {
                closeOnEscape: false,
            $("#opener").click(function (event) {

Open in new window

This is what I have in the dialog box: 

// Here where I need the help 
// I want what ever I have in the textarea to be sent to the parent textarea. 

     $("#AppendConditionToParentBtn").click(function () {
            return true;

 <button id="AppendConditionToParentBtn" name="AppendConditionToParentBtn" class="btn btn-default" type="button" style="margin-top:10px;margin-bottom:10px;" value="Append">

Open in new window

I'm getting this error

Unhandled exception at line 513, column 13 in eval code

0x800a138f - JavaScript runtime error: Unable to get property '$' of undefined or null reference
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