Aspose.Cells FOSS for .NET

dotnet add package Aspose.Cells_FOSS

using Aspose.Cells_FOSS;

var outputPath = "cell-data-roundtrip.xlsx";
var workbook = new Workbook();
var sheet = workbook.Worksheets[0];

sheet.Cells["A1"].PutValue("Hello");
sheet.Cells["B1"].PutValue(123);
sheet.Cells["C1"].PutValue(true);
sheet.Cells["D1"].PutValue(12.5m);
sheet.Cells["F1"].PutValue(10);
sheet.Cells["G1"].Formula = "=F1*2";
workbook.Save(outputPath);

var loaded = new Workbook(outputPath);
var loadedSheet = loaded.Worksheets[0];
Console.WriteLine(loadedSheet.Cells["A1"].StringValue);
Console.WriteLine(loadedSheet.Cells["G1"].Formula);

using Aspose.Cells_FOSS;

var workbook = new Workbook();
var sheet = workbook.Worksheets[0];
sheet.Name = "Conditional Formatting";

for (var i = 0; i < 10; i++)
    sheet.Cells[i, 0].PutValue(i + 1);

var cfCol = sheet.ConditionalFormattings[sheet.ConditionalFormattings.Add()];
cfCol.AddArea(CellArea.CreateCellArea("A1", "A10"));
var rule = cfCol[cfCol.AddCondition(FormatConditionType.CellValue,
    OperatorType.Between, "3", "7")];
var style = rule.Style;
style.Pattern = FillPattern.Solid;
style.ForegroundColor = Color.FromArgb(255, 255, 199, 206);
style.Font.Bold = true;
rule.Style = style;

workbook.Save("conditional-formatting.xlsx");

using Aspose.Cells_FOSS;

var workbook = new Workbook();
var sheet = workbook.Worksheets[0];
sheet.Name = "Links";

sheet.Cells["A1"].PutValue("Docs");
var link = sheet.Hyperlinks[sheet.Hyperlinks.Add("A1", 1, 1, "https://example.com/docs")];
link.TextToDisplay = "Docs";
link.ScreenTip = "External docs";

var name = workbook.DefinedNames[workbook.DefinedNames.Add("GlobalRange", "='Links'!$A$1:$D$5")];
name.Comment = "Primary sample range";

workbook.Save("hyperlinks-and-names.xlsx");