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jQWidgets jqxTreeGrid expandRow() Method

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  • Last Updated : 04 Oct, 2021

jQWidgets is a JavaScript framework for making web-based applications for PC and mobile devices. It is a very powerful, optimized, platform-independent, and widely supported framework. The jqxTreeGrid is used for representing data in a tree-like structure. This widget is useful for displaying multi-column of hierarchical data, data paging, sorting and filtering, data editing, column resizing, fixed columns, conditional formatting, aggregates, and rows selection. These widgets also read and display the data from any type of data sources such as XML, JSON, Array, CSV, or TSV.

The expandRow() method is used to expand a row of the specified jqxTreeGrid.

Syntax:

$("#treeGrid").jqxTreeGrid('expandRow', rowKey);

Parameters: This method accepts a parameter that is illustrated below:

  • rowKey: This is the specified row that will be expanded. It specifies the unique id which identifies the specific row. It is of string type.

Return Values: This method does not return any values.

Linked Files: Download jQWidgets from the given link. In the HTML file, locate the script files in the downloaded folder.

<link rel=”stylesheet” href=”jqwidgets/styles/jqx.base.css” type=”text/css” />
<script type=”text/javascript” src=”scripts/jquery.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxcore.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdata.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxbuttons.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxscrollbar.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxlistbox.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdropdownlist.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdatatable.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxtreegrid.js”></script>

Example: The below example illustrates the jQWidgets jqxTreeGrid expandRow() method. In the below example, the third row will be expanded.

HTML




<!DOCTYPE html>
<html lang="en">
  <head>
    <link rel="stylesheet"
            href="jqwidgets/styles/jqx.base.css"
            type="text/css" />
    <script type="text/javascript" 
            src="scripts/jquery.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxcore.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxdata.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxbuttons.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxscrollbar.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxlistbox.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxdropdownlist.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxdatatable.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxtreegrid.js">
    </script>
  </head>
  
  <body>
    <center>
      <h1 style="color: green">GeeksforGeeks</h1>
      <h3>jQWidgets jqxTreeGrid expandRow() Method</h3>
      <div id="jqxTreeGrid" style="margin: 25px"></div>
      <input
        type="button"
        style="margin: 20px"
        id="button_for_expandRow"
        value="Expand the third row"/>
      <div id="log"></div>
        
      <script type="text/javascript">
        $(document).ready(function () {
          var A = [
            {
              ID: 1,
              Employee_Name: "Amit",
              Company: "GeeksforGeeks",
              Designation: "Content Writer",
              expanded: true,
              A1: [
                {
                  ID: 2,
                  Employee_Name: "Sumit",
                  Company: "Amazon",
                  Designation: "Software Engineer",
                },
                {
                  ID: 3,
                  Employee_Name: "Vivek",
                  Company: "Apple",
                  Designation: "Product Manager",
                  A1: [
                    {
                      ID: 4,
                      Employee_Name: "Soni",
                      Company: "Flipkart",
                      Designation: "HR",
                    },
                  ],
                },
              ],
            },
          ];
  
          var Data_Source = {
            dataFields: [
              {
                name: "ID",
              },
              {
                name: "Employee_Name",
              },
              {
                name: "Company",
              },
              {
                name: "Designation",
              },
              {
                name: "A1",
                type: "array",
              },
              {
                name: "expanded",
              },
            ],
            hierarchy: {
              root: "A1",
            },
            id: "ID",
            localData: A,
          };
  
          var Data = new $.jqx.dataAdapter(Data_Source);
  
          $("#jqxTreeGrid").jqxTreeGrid({
            source: Data,
            columns: [
              {
                text: "Employee_Name",
                align: "center",
                dataField: "Employee_Name",
                width: 140,
              },
              {
                text: "Company",
                align: "center",
                dataField: "Company",
                width: 150,
              },
              {
                text: "Designation",
                align: "center",
                dataField: "Designation",
                width: 150,
              },
            ],
          });
          $("#button_for_expandRow").jqxButton({
            width: 400,
            height: 35,
          });
          $("#button_for_expandRow").click(function () {
            $("#jqxTreeGrid").jqxTreeGrid("expandRow", 3);
          });
        });
      </script>
    </center>
  </body>
</html>

Output:

Reference: https://www.jqwidgets.com/jquery-widgets-documentation/documentation/jqxtreegrid/jquery-treegrid-api.htm?search=


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