Progress Telerik UI for WPF

SpreadStreamProcessing

Handle Large XLSX and CSV Files

SpreadStreamProcessing is a library for creating large spreadsheet documents and exporting them to XLSX and CSV file formats with great performance, minimal memory and less resources.

It also enables styling and formatting of cells and offers grouping, as well as hidden rows and columns.
Charts Support
The Spreadsheet component offers support for Charts to enable you to add or remove charts objects, and import/save (including to PDF format) workbooks with the following chart types:
- Column
- Bar
- Line
- Pie & Donut
- Area
- Combo