FormulaEngineer examples

Create, read, and style Excel workbooks in .NET.

Style workbooks as you write them — fonts, fills, borders, number formats, alignment, and layout — using ExcelStyledWriter. Every example below is a complete, runnable snippet.

Group

Cells and text 10 Layout 10 Conditional formatting 6 Named styles and themes 4 Tables and notes 10 Images and shapes 4 Charts and sparklines 6 Dashboards 4

Example

4 examples in Images and shapes

Rounded rectangle callout

EnableShapes

Draws a single rounded rectangle carrying text — a callout that floats above the grid rather than occupying cells, useful for annotating a generated report.

Write.cs

using FormulaEngineer.Api;
using FormulaEngineer.Api.Styling;

var stylingOptions =
    new ExcelStylingOptions
    {
        EnableShapes = true
    };

using (var writer = new ExcelStyledWriter("rounded-rectangle-callout-shape.xlsx", null, stylingOptions))
{
    using (var sheet = writer.CreateWorksheet("Callout"))
    {
        sheet.WriteRow("Dashboard note");

        sheet.AddShape(
            ExcelShape.Create(
                ExcelShapeKind.RoundedRectangle,
                ExcelDrawingAnchor.OneCell(
                    column: 3,
                    row: 3,
                    widthPixels: 220d,
                    heightPixels: 80d),
                text: ExcelShapeText.Create("Review complete"),
                name: "Review callout"));
    }

    writer.Close();
}

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Style your own workbooks

Styling is part of the same package — no separate install, no Excel, no COM automation.

Get FormulaEngineer on NuGet Contact for styling questions