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
10
examples
in Layout
Fixed-width columns
Sets an explicit width per column before the first row is written, so a description column gets room to breathe while code and owner columns stay narrow.
Write.cs
using FormulaEngineer.Api;
using FormulaEngineer.Api.Styling;
var headerStyle =
ExcelStyle.Default.With(
font: ExcelFontStyle.Default.With(
bold: true,
color: ExcelColor.FromRgb(255, 255, 255)),
fill: ExcelFillStyle.Solid(
ExcelColor.FromRgb(31, 78, 121)));
using (var writer = new ExcelStyledWriter("fixed-width-columns.xlsx"))
{
using (var sheet = writer.CreateWorksheet("Layout"))
{
sheet.SetColumnStyle(1, ExcelColumnStyle.Default.With(width: 14d));
sheet.SetColumnStyle(2, ExcelColumnStyle.Default.With(width: 32d));
sheet.SetColumnStyle(3, ExcelColumnStyle.Default.With(width: 16d));
sheet.WriteRow(
new object?[] { "Code", "Description", "Owner" },
headerStyle);
sheet.WriteRow("A-100", "Formula calculation service", "Finance");
sheet.WriteRow("B-200", "Streaming workbook export", "Operations");
sheet.WriteRow("C-300", "Dashboard package", "Sales");
}
writer.Close();
}
Style your own workbooks
Styling is part of the same package — no separate install, no Excel, no COM automation.