Merge pull request #208 from SyncfusionExamples/912128-HighlightCellsWithErrors

912128-How to apply conditional formatting to highlight cells with errors in red background using C#?

Author: Mohan2401

Use Cases/Conditional Formatting/.NET/Highlight cells with errors/HighLightCellsWithErrors.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36127.28 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HighLightCellsWithErrors", "HighLightCellsWithErrors\HighLightCellsWithErrors.csproj", "{2640FE48-0576-497D-A510-967D9CF72201}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{2640FE48-0576-497D-A510-967D9CF72201}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2640FE48-0576-497D-A510-967D9CF72201}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{2640FE48-0576-497D-A510-967D9CF72201}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{2640FE48-0576-497D-A510-967D9CF72201}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {311E5A9F-EE7B-4384-9CAA-B5CC318B459B}
+	EndGlobalSection
+EndGlobal

Use Cases/Conditional Formatting/.NET/Highlight cells with errors/HighLightCellsWithErrors/HighLightCellsWithErrors.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Highlight_cells_with_errors</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.XlsIO.Net.Core" Version="*" />
+  </ItemGroup>
+
+  <ItemGroup>
+	<None Update="Output\*">
+		<CopyToOutputDirectory>Always</CopyToOutputDirectory>
+	</None>
+  </ItemGroup>
+
+</Project>

Use Cases/Conditional Formatting/.NET/Highlight cells with errors/HighLightCellsWithErrors/Output/.gitkeep

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+using Syncfusion.XlsIO;
+
+class Program
+{ 
+    public static void Main(string[] args)
+    {
+        using (ExcelEngine excelEngine = new ExcelEngine())
+        {
+            IApplication application = excelEngine.Excel;
+            IWorkbook workbook = application.Workbooks.Create(1);
+            IWorksheet worksheet = workbook.Worksheets[0];
+
+            //Add some data and errors
+            worksheet.Range["A1"].Text = "Sample Data";
+
+            //Creates a #DIV/0! error
+            worksheet.Range["A2"].Formula = "=1/0";
+
+            //Creates a #N/A error
+            worksheet.Range["A3"].Formula = "=VLOOKUP(\"NonExistent\",B1:C5,2,FALSE)"; 
+
+            //Define the range to apply formatting
+            IRange range = worksheet.Range["A1:A10"];
+
+            //Add conditional formatting to highlight cells with errors
+            IConditionalFormats conditionalFormats = range.ConditionalFormats;
+            IConditionalFormat conditionalFormat = conditionalFormats.AddCondition();
+
+            //Set format type to ContainsErrors
+            conditionalFormat.FormatType = ExcelCFType.ContainsErrors;
+
+            //Apply red background to cells containing errors
+            conditionalFormat.BackColor = ExcelKnownColors.Red;
+
+            #region Save
+            //Saving the workbook
+            FileStream outputStream = new FileStream(Path.GetFullPath("Output.xlsx"), FileMode.Create, FileAccess.Write);
+            workbook.SaveAs(outputStream);
+            #endregion
+
+            //Dispose streams
+            outputStream.Dispose();
+        }
+    }
+}