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Set conditional formatting for text in C#, VB.NET

Platform: WinForms |
Control: XlsIO |
Published Date: April 30, 2011 |
Last Revised Date: April 9, 2019

Syncfusion Excel (XlsIO) library is a .NET Excel library used to create, read, and edit Excel documents. Using this library, you can set conditional formatting for text in C# and VB.NET.

Conditional formatting allows to format the contents of a cell dynamically. This can be defined and applied in XlsIO through the IConditionalFormat interface.

Steps to set conditional formatting for text programmatically:

Step 1: Create a new C# console application project.

Create Console appliation in Visual Studio

Create a new C# console application

Step 2: Install Syncfusion.XlsIO.WinForms NuGet package as a reference to your .NET Framework applications from the NuGet.org.

Add XlsIO reference to the project

Install NuGet package

Step 3: Include the following namespace in the Program.cs file.

C#

using Syncfusion.XlsIO;

 

VB.NET

Imports Syncfusion.XlsIO

 

Step 4: Use the following code snippet to create Excel file with simple text.

C#

//Create an instance of ExcelEngine
using (ExcelEngine excelEngine = new ExcelEngine())
{
  //Set the default application version as Excel 2016
  excelEngine.Excel.DefaultVersion = ExcelVersion.Excel2016;
 
  //Create a workbook with a worksheet
  IWorkbook workbook = excelEngine.Excel.Workbooks.Create(1);
 
  //Access first worksheet from the workbook instance
  IWorksheet sheet = workbook.Worksheets[0];
 
  //Applying conditional formatting to "C1:D10" range
  IConditionalFormats condition = sheet.Range["C1:D10"].ConditionalFormats;
              
              //Adding formats to IConditionalFormats collection
              IConditionalFormat condition1 = condition.AddCondition();
 
              condition1.Operator = ExcelComparisonOperator.Equal;
 
              condition1.FormatType = ExcelCFType.CellValue;
 
              condition1.FirstFormula = "=\"welcome\"";
 
              //Setting format properties.
              condition1.BackColorRGB = Color.FromArgb(238, 122, 3);
 
              condition1.IsBold = true;
 
  condition1.IsItalic = true;
 
  //Insert text as welcome for cell “C5”
  sheet.Range["C5"].Text = "welcome";
  
  //Save the workbook to disk in xlsx format
  workbook.SaveAs("Output.xlsx");
}

 

VB.NET

'Create an instance of ExcelEngine
Using excelEngine As ExcelEngine = New ExcelEngine
 
  'Set the default application version as Excel 2016
  excelEngine.Excel.DefaultVersion = ExcelVersion.Excel2016
 
  'Create a workbook with a worksheet
  Dim workbook As IWorkbook = excelEngine.Excel.Workbooks.Create(1)
 
  'Access first worksheet from the workbook instance
  Dim sheet As IWorksheet = workbook.Worksheets(0)
 
  'Applying conditional formatting to "C1:D10" range
          Dim condition As IConditionalFormats = sheet.Range("C1:D10").ConditionalFormats
 
          'Adding formats to IConditionalFormats collection
          Dim condition1 As IConditionalFormat = condition.AddCondition()
 
          condition1.Operator = ExcelComparisonOperator.Equal
 
          condition1.FormatType = ExcelCFType.CellValue
 
          condition1.FirstFormula = "=""welcome"""
 
          'Setting format properties.
          condition1.BackColorRGB = Color.FromArgb(238, 122, 3)
 
          condition1.IsBold = True
 
  condition1.IsItalic = True
 
  'Insert text as welcome for cell “C5”
  sheet.Range("C5").Text = "welcome"
 
  'Save the workbook to disk in xlsx format
  workbook.SaveAs("Output.xlsx")
 
End Using

 

A complete working example of how to set conditional formatting for text in C#/VB.NET can be downloaded from Set Conditional Formats.zip.

By executing the program, you will get the output Excel file as shown below.

Output Excel document

Take a moment to peruse the documentation, where you can find basic worksheet data manipulation options along with features like Conditional Formatting, worksheet calculations through Formulas, adding Charts in worksheet or workbook, organizing and analyzing data through Tables and Pivot Tables, appending multiple records to worksheet using Template Markers, and most importantly PDF and Image conversions with code examples.

Refer here to explore the rich set of Syncfusion Excel (XlsIO) library features.

Note:

Starting with v16.2.0.x, if you reference Syncfusion assemblies from trial setup or from the NuGet feed, include a license key in your projects. Refer the link to learn about generating and registering Syncfusion license key in your application to use the components without trail message.

 

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