Added new kb article grid-pdf-export-page-break-on-group (#608)

* Added new kb article grid-pdf-export-page-break-on-group

* adjust description and slug

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Co-authored-by: KB Bot <kb-bot@telerik.com>
Co-authored-by: Attila Antal <antal@progress.com>

knowledge-base/grid-pdf-export-page-break-on-group.md

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+---
+title: Add Page Breaks Between Groups in RadGrid PDF Export
+description: Learn how to insert page breaks in RadGrid to ensure each group starts on a new page when exported to PDF.
+type: how-to
+page_title: Add Page Breaks Between Groups in RadGrid PDF Export
+slug: grid-add-page-breaks-between-groups-in-pdf-export
+tags: radgrid, export, pdf, group, page-break, asp.net ajax
+res_type: kb
+ticketid: 1667087
+---
+
+## Environment
+
+<table>
+<tbody>
+<tr>
+<td>Product</td>
+<td>RadGrid for ASP.NET AJAX</td>
+</tr>
+<tr>
+<td>Version</td>
+<td>2024.3.805</td>
+</tr>
+</tbody>
+</table>
+
+## Description
+
+When exporting a [RadGrid](https://docs.telerik.com/devtools/aspnet-ajax/controls/grid/functionality/exporting/overview) to PDF, it's required to start each group on a new page. To achieve this, a page break needs to be inserted after each group's end. This KB article also answers the following questions:
+- How can I ensure each group in RadGrid starts on a new page when exporting to PDF?
+- Is it possible to insert page breaks in RadGrid's PDF export based on the group change?
+- How to customize RadGrid's PDF export to have each group on separate pages?
+
+## Solution
+
+To insert a page break on each group change when exporting RadGrid to PDF, follow these steps:
+
+1. **Enable the Group Footer** in the `MasterTableView` by setting the `ShowGroupFooter` property to `true`.
+
+    ````ASPX
+    <MasterTableView ShowGroupFooter="true">
+    ````
+
+2. **Inject the Page Break into the Footer of Each Group**. In the `PreRender` event of RadGrid, iterate through the Group Footer items and add the page break into their cells.
+
+    ````C#
+    protected void RadGrid1_PreRender(object sender, EventArgs e)
+    {
+        // Get all GroupFooter items
+        GridItem[] groupFooterItems = RadGrid1.MasterTableView.GetItems(GridItemType.GroupFooter);
+
+        // Iterate through all except the last
+        for (int i = 0; i < groupFooterItems.Length - 1; i++)
+        {
+            // Inject the page break into the first cell of the Group Footer
+            groupFooterItems[i].Cells[0].Text = "<?hard-pagebreak ?>";
+        }
+    }
+    ````
+
+3. **Optional: Hide the Group Footer**. If you do not wish to display the Group Footer in the exported PDF, use CSS to target the Footer element and hide it.
+
+    ````CSS
+    <style>
+        .RadGrid .rgMasterTable .rgFooter {
+            display: none;
+        }
+    </style>
+    ````
+
+This setup ensures that each group in the RadGrid starts on a new page in the exported PDF by utilizing a hard page break at the end of each group.
+
+## See Also
+
+- [RadGrid Export to PDF Documentation](https://docs.telerik.com/devtools/aspnet-ajax/controls/grid/functionality/exporting/export-formats/export-to-pdf)
+- [RadGrid Grouping Overview](https://docs.telerik.com/devtools/aspnet-ajax/controls/grid/data-editing/grouping/grouping)
+- [Customizing RadGrid PDF Export](https://docs.telerik.com/devtools/aspnet-ajax/controls/grid/functionality/exporting/export-to-pdf/pdf-export-customization)