Exporting filtered data in EJ2 TypeScript Treegrid control

You can export the filtered data by defining the resulted data in PdfExportProperties.dataSource before export.

In the below Pdf exporting demo, We have gotten the filtered data from the filteredResult of Tree Grid filterModule and then defines the resulted data in PdfExportProperties.dataSource and pass it to pdfExport method.

import { TreeGrid, Page, Toolbar, PdfExport, Filter } from "@syncfusion/ej2-treegrid";
import { projectData } from './datasource.ts';
import { ClickEventArgs } from "@syncfusion/ej2-navigations";

TreeGrid.Inject(Page, Filter, Toolbar, PdfExport);

let treegrid: TreeGrid = new TreeGrid({
  dataSource: projectData,
  idMapping: "TaskID",
  parentIdMapping: "parentID",
  treeColumnIndex: 1,
  allowPaging: true,
  allowFiltering: true,
  pageSettings: { pageSize: 5, pageCount: 5 },
  allowExcelExport: true,
  allowPdfExport: true,
  toolbar: ["PdfExport"],
  toolbarClick: toolbarClick,
  columns: [
    { field: "TaskID", headerText: "Task ID", textAlign: "Right", width: 70,
    { field: "TaskName", headerText: "Task Name", width: 100 },
    { field: "StartDate", headerText: "Start Date", textAlign: "Right", width: 100,
      format: { skeleton: "yMd", type: "date" } },
    { field: "EndDate", headerText: "End Date", textAlign: "Right", width: 100,
      format: { skeleton: "yMd", type: "date" } },
    { field: "Duration", headerText: "Duration", textAlign: "Right", width: 90 },
    { field: "Priority", headerText: "Priority", width: 90 }
  ]
});
treegrid.appendTo("#TreeGrid");
function toolbarClick(args: ClickEventArgs) {
  if (treegrid && args.item.text === "PDF Export") {
    let pdfdata;
    pdfdata = treegrid.filterModule.filteredResult;
    const exportProperties = {
      dataSource: pdfdata
    };
    if (treegrid) {
      treegrid.pdfExport(exportProperties);
    }
  }
}
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Grid</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Grid Control" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-grids/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-treegrid/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-calendars/styles/material.css" rel="stylesheet" />
    
    
    
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    
    
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='TreeGrid'></div>        
    </div>
</body>
</html>

You can refer to our JavaScript Tree Grid feature tour page for its groundbreaking feature representations. You can also explore our JavaScript Tree Grid example JavaScript Tree Grid example to knows how to present and manipulate data.