Advanced Formula Calculation

Two types of formulas are supported

1. Reporting Services formulas – evaluated by Aspose.Cells at render time.
2. Microsoft Excel dynamic formulas – transformed into native Excel formulas before being written to the workbook.

Both can be used directly in Aspose.Cells.Report.Designer just like you would in Visual Studio. The key difference is when the calculation happens:

Formula Type	When is it evaluated?	What is stored in the workbook?
Reporting Services	At rendering time (server‑side)	The calculated value is written back to the cell.
Excel dynamic formula	During export – the expression is converted to a real Excel formula	The Excel formula (e.g., =SUM(A1:A5)) is stored, allowing end‑users to edit/re‑calculate in Excel.

📊 Sample Report with Calculated Formulas

The screenshot below shows a report that contains Reporting Services formulas. When the report is rendered, the formulas are executed and the results are placed into the corresponding cells.

(If you open the exported workbook in Excel you will see the static values, not the underlying formulas.)

🛠 How to Use Reporting Services Formulas

1. Open your .rdl template in Aspose.Cells.Report.Designer.
2. Click the insert formula dialog command button.
3. Set reporting services formula in the edit formula dialog.

Tips

• Keep expressions simple; complex logic can affect rendering performance.
• Use the built‑in functions (Sum, Avg, IIF, etc.) whenever possible.
• Test formulas with a small data set first to verify correctness.

📚 Further Reading

• Aspose.Cells for Reporting Services Documentation – comprehensive guide to all supported functions and properties.
• Microsoft Excel Formula Reference – official list of Excel functions and syntax.