using IronXL;
using IronXL.Formatting;
using IronXL.Formatting.Enums;
using IronXL.Styles;

WorkBook workbook = WorkBook.Load("test.xlsx");
WorkSheet sheet = workbook.DefaultWorkSheet;

//Create a specific conditional formatting rule.
ConditionalFormattingRule rule = sheet.ConditionalFormatting.CreateConditionalFormattingRule(ComparisonOperator.LessThan, "8");
//Set different style options.
rule.FontFormatting.IsBold = true;
rule.FontFormatting.FontColor = "#123456";
rule.BorderFormatting.RightBorderColor = "#ffffff";
rule.BorderFormatting.RightBorderType = BorderType.Thick;
rule.PatternFormatting.BackgroundColor = "#54bdd9";
rule.PatternFormatting.FillPattern = FillPattern.Diamonds;
//Add formatting with the specified region.
sheet.ConditionalFormatting.AddConditionalFormatting("A3:A8", rule);

ConditionalFormattingRule rule1 = sheet.ConditionalFormatting.CreateConditionalFormattingRule(ComparisonOperator.Between, "7", "10");
rule1.FontFormatting.IsItalic = true;
rule1.FontFormatting.UnderlineType = FontUnderlineType.Single;
sheet.ConditionalFormatting.AddConditionalFormatting("A3:A9", rule1);

workbook.SaveAs("ApplyConditionalFormatting.xlsx");

Imports IronXL
Imports IronXL.Formatting
Imports IronXL.Formatting.Enums
Imports IronXL.Styles

Private workbook As WorkBook = WorkBook.Load("test.xlsx")
Private sheet As WorkSheet = workbook.DefaultWorkSheet

'Create a specific conditional formatting rule.
Private rule As ConditionalFormattingRule = sheet.ConditionalFormatting.CreateConditionalFormattingRule(ComparisonOperator.LessThan, "8")
'Set different style options.
rule.FontFormatting.IsBold = True
rule.FontFormatting.FontColor = "#123456"
rule.BorderFormatting.RightBorderColor = "#ffffff"
rule.BorderFormatting.RightBorderType = BorderType.Thick
rule.PatternFormatting.BackgroundColor = "#54bdd9"
rule.PatternFormatting.FillPattern = FillPattern.Diamonds
'Add formatting with the specified region.
sheet.ConditionalFormatting.AddConditionalFormatting("A3:A8", rule)

Dim rule1 As ConditionalFormattingRule = sheet.ConditionalFormatting.CreateConditionalFormattingRule(ComparisonOperator.Between, "7", "10")
rule1.FontFormatting.IsItalic = True
rule1.FontFormatting.UnderlineType = FontUnderlineType.Single
sheet.ConditionalFormatting.AddConditionalFormatting("A3:A9", rule1)

workbook.SaveAs("ApplyConditionalFormatting.xlsx")