Merge pull request #310 from SyncfusionExamples/1003194-Hidden-Column

UG documentation 1003194: FAQ for how to detect whether a column is hidden in an Excel file using XlsIO

Author: Mohan2401

FAQ/Hidden Column/.NET/Hidden Column/Hidden Column.slnx

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+<Solution>
+  <Project Path="Hidden Column/Hidden Column.csproj" />
+</Solution>

FAQ/Hidden Column/.NET/Hidden Column/Hidden Column/Hidden Column.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Hidden_Column</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>

FAQ/Hidden Column/.NET/Hidden Column/Hidden Column/Output/.gitkeep

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+using Syncfusion.XlsIO;
+using Syncfusion.XlsIO.Implementation;
+
+class Program
+{
+    static void Main(string[] args)
+    {
+        using (ExcelEngine excelEngine = new ExcelEngine())
+        {
+            IApplication application = excelEngine.Excel;
+            application.DefaultVersion = ExcelVersion.Xlsx;
+            IWorkbook workbook = application.Workbooks.Create(1);
+
+            // Use the concrete WorksheetImpl when you need access to implementation-specific members
+            WorksheetImpl sheet = workbook.Worksheets[0] as WorksheetImpl;
+
+            // Hide column 1
+            sheet.ShowColumn(1, false);
+
+            // Detect whether column 1 is hidden
+            bool hidden = sheet.ColumnInformation[1] != null && sheet.ColumnInformation[1].IsHidden;
+
+            Console.WriteLine($"Column 1 hidden: {hidden}");
+
+            workbook.SaveAs(Path.GetFullPath(@"Output/Output.xlsx"));
+        }
+    }
+}