Useful Export Tips
For a general example on how to Export the data, you can check the Exporting examples of RadGridView in the WPF Demos application.
How to Export Paged Data
- Cache the PageSize and the PageIndex of the associated RadDataPager in variables.
- Set the PageSize of RadDataPager to 0. This will ensure that all items of the GridView are within the current data view.
- Export the data (you can use the (IEnumerable) dataPager.PagedSource as GridViewExportOptions.Items).
- Restore the cached PageSize and the PageIndex.
See this approach in the ExportPagedDataExcel SDK example.
Avoid Error Warning When Exporting to XLS Format
The alert is a new security feature in Excel 2007 called Extension Hardening, which ensures that the file content being opened matches the extension type specified in the shell command that is attempting to open the file. In order to avoid getting this warning, you should export to ExcelML format with XML extension. You can also refer to the following help article for additional information.
How to Export Data to XLSX Format
As of Q1 2015 a new method is introduced: ExportToXlsx. This exporting functionality is demonstrated in the Exporting to Xlsx and Pdf demo.
How to Export Data to PDF Format
As of Q1 2015 a new method is introduced: ExportToPdf. This exporting functionality is demonstrated in the Exporting to Xlsx and Pdf demo.
Some Columns are Exported With a Minimum Width
RadGridView exports the respective header cells with the minimum width value (which is 20 by default) if they have not been measured by the layout mechanism at the time the exporting operation takes place.To get all the columns exported with their actual width, you should first assure that they have been realized.As an alternative solution, if you do not have that much columns, you can set EnableColumnVirtualization="False" for RadGridView.
Avoid Exporting Specific Columns
You can subscribe for the ElementExporting event of RadGridView to control which columns will be exported. Once the event is raised, you can cancel the export (by setting e.Cancel = true) when the column of the currently exported element is a column you would like to skip.
How to Modify the Exported Value
You could subscribe for the ElementExporting event of RadGridView and change the e.Value to be exported.
Export Data on Multiple Worksheets of the Same Workbook
You can export data on different worksheets with RadSpreadProcessing, which model is completely independent from UI. You can also check the Export with RadSpreadProcessing demo which shows how to export multiple worksheets.
Why OutOfMemoryException May Occur
All the data to be exported is saved in memory, so the exporting capacity are limitted by the memory available for the associated .NET process. For heavier scenarios, you consider using our Reporting tools built to suit various exporting scenarios.
You can also export data with the RadSpreadProcessing library. See the Export with RadSpreadProcessing demo which shows how to export the RadGridView data using the library.
Additionally, when it comes to export, you can check the RadSpreadStreamProcessing library which allows you to write directly in the file, instead of holding the complete document model in memory.