Demo - Frozen Rows and Columns

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdn.grapecity.com/wijmo/5.latest/styles/wijmo.min.css">
<script src="https://cdn.grapecity.com/wijmo/5.latest/controls/wijmo.min.js"></script>
<script src="https://cdn.grapecity.com/wijmo/5.latest/controls/wijmo.grid.min.js"></script>
<script src="https://cdn.grapecity.com/wijmo/5.latest/controls/wijmo.pdf.min.js"></script>
<script src="https://cdn.grapecity.com/wijmo/5.latest/controls/wijmo.grid.pdf.min.js"></script>
<br/>
<br/>
<br/>
<div class="container">
  <div id="theGrid"></div>

  <button id="export" class="btn btn-default">
    Export to PDF
  </button>
</div>

CSS

.wj-flexgrid {
  max-height: 250px; 
  margin: 10px 0;
}
body {
  margin-bottom: 20px;
}

/* style frozen cells */
.wj-cell.wj-frozen:not(.wj-header):not(.wj-group):not(.wj-state-selected):not(.wj-state-multi-selected),
.wj-cell.wj-frozen.wj-alt:not(.wj-header):not(.wj-group):not(.wj-state-selected):not(.wj-state-multi-selected) {
  background: rgb(255,255,125);
}

.wj-flexgrid .wj-cell.wj-frozen-col {
    z-index: 0;
}

JavaScript

onload = function () {

  // generate some random data
  var countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','),
      data = [];
  for (var i = 0; i < 10; i++) {
    data.push({
    	id: i,
      country: countries[i % countries.length],
      downloads: Math.round(Math.random() * 20000),
      sales: Math.random() * 10000,
      expenses: Math.random() * 5000,
      num1: Math.random() * 5000,
      num2: Math.random() * 5000,
      num3: Math.random() * 5000,
      num4: Math.random() * 5000,
      num5: Math.random() * 5000,
    });
  }

	// default behavior: allow column reordering
  var theGrid = new wijmo.grid.FlexGrid('#theGrid', {
    itemsSource: data
  });
  
  document.getElementById("export").addEventListener("click", e => {
  			var d = new Date;
				var dformat = [
					d.getFullYear(),
					d.getMonth() + 1,
					d.getDate()].join('/') + ' ' + [d.getHours(), d.getMinutes(), d.getSeconds()].join(':');
  		 var pdf = wijmo.pdf;
       var gridPdf = wijmo.grid.pdf;
       let doc = new pdf.PdfDocument({
            header: {
                declarative: {
                    text: '\t\t' + dformat
                }
            },
            footer: {
                declarative: {
                    text: '\t&[Page]\\&[Pages]'
                }
            },
            ended: (sender, args) => pdf.saveBlob(args.blob, 'FlexGrid.pdf')
        });
        //
        let settings = {
            styles: {
                cellStyle: {
                    backgroundColor: '#ffffff',
                    borderColor: '#c6c6c6'
                },
                altCellStyle: {
                    backgroundColor: '#f9f9f9'
                },
                groupCellStyle: {
                    backgroundColor: '#dddddd'
                },
                headerCellStyle: {
                    backgroundColor: '#eaeaea'
                }
            }
        };
        // gridPdf.FlexGridPdfConverter.draw(theGrid, doc, 200, null, settings);
     ...