syncfusion-content · SyncfusionBuild · Apr 13, 2026 · Apr 14, 2026 · Apr 14, 2026 · Apr 20, 2026
diff --git a/Document-Processing-toc.html b/Document-Processing-toc.html
diff --git a/...rary/NET/faqs/how-to-assign-cell-value-without-changing-format-type-in-xlsio.md b/...rary/NET/faqs/how-to-assign-cell-value-without-changing-format-type-in-xlsio.md
@@ -0,0 +1,73 @@
+---
+title: Assign Cell Value Without Changing Format | Syncfusion
+description: Demonstrates assigning values to cells in Syncfusion XlsIO without changing formats, using Text or setting NumberFormat before Value.
+platform: document-processing
+control: XlsIO
+documentation: UG
+---
+
+# How to assign cell value without changing the format type in XlsIO?
+
+Assigning a value to a cell using the `Value` property can change the cell's format type based on the assigned value. If you want to preserve the existing display/format, write the value using the `Text` property. Alternatively, set the desired `NumberFormat` (for example text format "@") before assigning with `Value`.
+
+The following examples show both approaches.
+
+{% tabs %}
+{% highlight c# tabtitle="C# [Cross-platform]" %}
+using (ExcelEngine excelEngine = new ExcelEngine())
+{
+    IApplication application = excelEngine.Excel;
+    application.DefaultVersion = ExcelVersion.Xlsx;
+    IWorkbook workbook = application.Workbooks.Create(1);
+    IWorksheet worksheet = workbook.Worksheets[0];
+
+    // Preserve existing formatting by assigning text directly
+    worksheet.Range["A1"].Text = "1-";
+
+    // Or set the cell's NumberFormat to Text before using Value
+    worksheet.Range["A2"].NumberFormat = "@";
+    worksheet.Range["A2"].Value = "1-";
+
+    workbook.SaveAs(Path.GetFullPath("Output/Output.xlsx"));
+}
+{% endhighlight %}
+
+{% highlight c# tabtitle="C# [Windows-specific]" %}
+using (ExcelEngine excelEngine = new ExcelEngine())
+{
+    IApplication application = excelEngine.Excel;
+    application.DefaultVersion = ExcelVersion.Xlsx;
+    IWorkbook workbook = application.Workbooks.Create(1);
+    IWorksheet worksheet = workbook.Worksheets[0];
+
+    // Preserve formatting by using Text
+    worksheet.Range["A1"].Text = "1-";
+
+    // Force Text number format, then set value
+    worksheet.Range["A2"].NumberFormat = "@";
+    worksheet.Range["A2"].Value = "1-";
+
+    workbook.SaveAs("Output.xlsx");
+}
+{% endhighlight %}
+
+{% highlight vb.net tabtitle="VB.NET [Windows-specific]" %}
+Using excelEngine As New ExcelEngine()
+    Dim application As IApplication = excelEngine.Excel
+    application.DefaultVersion = ExcelVersion.Xlsx
+    Dim workbook As IWorkbook = application.Workbooks.Create(1)
+    Dim worksheet As IWorksheet = workbook.Worksheets(0)
+
+    ' Preserve existing formatting by assigning text directly
+    worksheet("A1").Text = "1-"
+
+    ' Or set the NumberFormat to Text then assign Value
+    worksheet("A2").NumberFormat = "@"
+    worksheet("A2").Value = "1-"
+
+    workbook.SaveAs("Output.xlsx")
+End Using
+{% endhighlight %}
+{% endtabs %}
+
+A complete working example in C# is present on <a href="https://github.com/SyncfusionExamples/XlsIO-Examples/tree/991935-Cell-Value-Format/FAQ/Cell%20Value%20Without%20Changing%20Format/.NET/Cell%20Value%20Without%20Changing%20Format">this GitHub page</a>.
diff --git a/...l/Excel-Library/NET/faqs/how-to-convert-inches-to-points-in-syncfusion-xlsio.md b/...l/Excel-Library/NET/faqs/how-to-convert-inches-to-points-in-syncfusion-xlsio.md
@@ -0,0 +1,54 @@
+---
+title: How to convert inches to points in Syncfusion XlsIO? | Syncfusion
+description: Shows how to convert inches to points using `IApplication.InchesToPoints` in Syncfusion XlsIO. Useful for precise sizing of cells, shapes, and page layouts.
+platform: document-processing
+control: XlsIO
+documentation: UG
+---
+
+# How to convert inches to points in Syncfusion XlsIO?
+
+Converting measurements between units is common when laying out Excel content programmatically. Syncfusion XlsIO exposes an `InchesToPoints` helper on the `IApplication` instance that converts a measurement in inches to points.
+
+The following code example illustrates the conversion.
+
+{% tabs %}
+{% highlight c# tabtitle="C# [Cross-platform]" %}
+// Create an instance of ExcelEngine
+using (ExcelEngine excelEngine = new ExcelEngine())
+{
+    IApplication application = excelEngine.Excel;
+
+    // Converts inches to points
+    double inches = 4.5;
+    double points = application.InchesToPoints(inches);
+    Console.WriteLine($"{inches} inches is equal to {points} points.");
+}
+{% endhighlight %}
+
+{% highlight c# tabtitle="C# [Windows-specific]" %}
+// Create an instance of ExcelEngine
+using (ExcelEngine excelEngine = new ExcelEngine())
+{
+    IApplication application = excelEngine.Excel;
+
+    // Converts inches to points
+    double inches = 4.5;
+    double points = application.InchesToPoints(inches);
+    Console.WriteLine($"{inches} inches is equal to {points} points.");
+}
+{% endhighlight %}
+
+{% highlight vb.net tabtitle="VB.NET [Windows-specific]" %}
+Using excelEngine As New ExcelEngine()
+    Dim application As IApplication = excelEngine.Excel
+
+    ' Converts inches to points
+    Dim inches As Double = 4.5
+    Dim points = application.InchesToPoints(inches)
+    Console.WriteLine($"{inches} inches is equal to {points} points.")
+End Using
+{% endhighlight %}
+{% endtabs %}
+
+A complete working example in C# is present on <a href="https://github.com/SyncfusionExamples/XlsIO-Examples/tree/996021-Inches-To-Points/FAQ/Inches%20To%20Points/.NET/Inches%20To%20Points">this GitHub page</a>.
diff --git a/...xcel/Excel-Library/NET/faqs/how-to-copy-a-range-from-one-workbook-to-another.md b/...xcel/Excel-Library/NET/faqs/how-to-copy-a-range-from-one-workbook-to-another.md
@@ -8,7 +8,7 @@ documentation: UG
 
 # How to copy a range from one workbook to another?
 
-You can copy the range from source workbook to the destination workbook through [CopyTo](https://help.syncfusion.com/cr/file-formats/Syncfusion.XlsIO.IRange.html#Syncfusion_XlsIO_IRange_CopyTo_Syncfusion_XlsIO_IRange_Syncfusion_XlsIO_ExcelCopyRangeOptions_) method. 
+You can copy the range from source workbook to the destination workbook through [CopyTo](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.IRange.html#Syncfusion_XlsIO_IRange_CopyTo_Syncfusion_XlsIO_IRange_Syncfusion_XlsIO_ExcelCopyRangeOptions_) method. 
 
 The following code snippet illustrates this.
 
@@ -92,8 +92,8 @@ End Using
 
 ## See Also
 
-* [How to copy/paste the cell values that contain only formula?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-copy-paste-the-cell-values-that-contain-only-formula)
-* [How to copy or move a range?](https://help.syncfusion.com/file-formats/xlsio/worksheet-cells-manipulation#copy-or-move-a-range)
-* [How to copy and paste as link?](https://help.syncfusion.com/file-formats/xlsio/worksheet-cells-manipulation#copy-and-paste-as-link)
-* [How to skip blanks while copying?](https://help.syncfusion.com/file-formats/xlsio/worksheet-cells-manipulation#skip-blanks-while-copying)
-* [How to open an existing XLSX workbook and save it as XLS?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-open-an-existing-xlsx-workbook-and-save-it-as-xls)
+* [How to copy/paste the cell values that contain only formula?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-copy-paste-the-cell-values-that-contain-only-formula)
+* [How to copy or move a range?](https://help.syncfusion.com/document-processing/excel/excel-library/net/worksheet-cells-manipulation#copy-or-move-a-range)
+* [How to copy and paste as link?](https://help.syncfusion.com/document-processing/excel/excel-library/net/worksheet-cells-manipulation#copy-and-paste-as-link)
+* [How to skip blanks while copying?](https://help.syncfusion.com/document-processing/excel/excel-library/net/worksheet-cells-manipulation#skip-blanks-while-copying)
+* [How to open an existing XLSX workbook and save it as XLS?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-open-an-existing-xlsx-workbook-and-save-it-as-xls)
diff --git a/...T/faqs/how-to-detect-whether-a-column-is-hidden-in-an-excel-file-using-xlsio.md b/...T/faqs/how-to-detect-whether-a-column-is-hidden-in-an-excel-file-using-xlsio.md
@@ -0,0 +1,87 @@
+---
+title: How to detect if a column is hidden using XlsIO | Syncfusion
+description: Shows how to detect whether a column is hidden in an Excel and also shows how to check IsHidden property in a worksheet using Syncfusion XlsIO.
+platform: document-processing
+control: XlsIO
+documentation: UG
+---
+
+# How to detect whether a column is hidden in an Excel file using XlsIO?
+
+You can determine whether a column is hidden by inspecting the worksheet's column information. The example below uses `WorksheetImpl` to access the `ColumnInformation` collection and checks the `IsHidden` property for the requested column index.
+
+Note: column indices in `ColumnInformation` are 1-based.
+
+The following examples show the pattern in C# (cross-platform and Windows-specific) and VB.NET.
+
+{% tabs %}  
+{% highlight c# tabtitle="C# [Cross-platform]" %}
+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($"Column 1 hidden: {hidden}");
+
+    workbook.SaveAs(Path.GetFullPath(@"Output/Output.xlsx"));
+}
+{% endhighlight %}
+
+{% highlight c# tabtitle="C# [Windows-specific]" %}
+using (ExcelEngine excelEngine = new ExcelEngine())
+{
+    IApplication application = excelEngine.Excel;
+    application.DefaultVersion = ExcelVersion.Xlsx;
+    IWorkbook workbook = application.Workbooks.Create(1);
+
+    WorksheetImpl sheet = workbook.Worksheets[0] as WorksheetImpl;
+
+    // Hide column 1
+    sheet.ShowColumn(1, false);
+
+    // Detect whether column 1 is hidden
+    bool hidden = sheet.ColumnInformation[1] != null && sheet.ColumnInformation[1].IsHidden;
+
+    Console.WriteLine($"Column 1 hidden: {hidden}");
+
+    workbook.SaveAs("Output.xlsx");
+}
+{% endhighlight %}
+
+{% highlight vb.net tabtitle="VB.NET [Windows-specific]" %}
+Using excelEngine As New ExcelEngine()
+    Dim application As IApplication = excelEngine.Excel
+    application.DefaultVersion = ExcelVersion.Xlsx
+    Dim workbook As IWorkbook = application.Workbooks.Create(1)
+
+    ' Use the concrete WorksheetImpl when you need access to implementation-specific members
+    Dim sheet As WorksheetImpl = TryCast(workbook.Worksheets(0), WorksheetImpl)
+
+    ' Hide column 1
+    sheet.ShowColumn(1, False)
+
+    ' Detect whether column 1 is hidden
+    Dim hidden As Boolean = sheet.ColumnInformation(1) IsNot Nothing AndAlso sheet.ColumnInformation(1).IsHidden
+
+    Console.WriteLine($"Column 1 hidden: {hidden}")
+
+    workbook.SaveAs("Output.xlsx")
+End Using
+{% endhighlight %}
+{% endtabs %}
+
+A complete working example in C# is present on <a href="https://github.com/SyncfusionExamples/XlsIO-Examples/tree/1003194-Hidden-Column/FAQ/Hidden%20Column/.NET/Hidden%20Column">this GitHub page</a>.
+
+## See Also
+
+* [Working with Excel Worksheet](https://help.syncfusion.com/document-processing/excel/excel-library/net/working-with-excel-worksheet)
diff --git a/...ET/faqs/how-to-find-values-with-a-matching-case-for-specific-column-in-Excel.md b/...ET/faqs/how-to-find-values-with-a-matching-case-for-specific-column-in-Excel.md
@@ -7,7 +7,7 @@ documentation: UG
 ---
 
 # How to find values with a matching case for specific column in Excel?
-XlsIO allows finding values with matching case for specific column in Excel worksheet using **MatchCase** option of [ExcelFindOptions](https://help.syncfusion.com/cr/file-formats/Syncfusion.XlsIO.ExcelFindOptions.html) enumeration through [Find](https://help.syncfusion.com/cr/file-formats/Syncfusion.XlsIO.Implementation.WorksheetImpl.html#Syncfusion_XlsIO_Implementation_WorksheetImpl_Find_Syncfusion_XlsIO_IRange_System_String_Syncfusion_XlsIO_ExcelFindType_Syncfusion_XlsIO_ExcelFindOptions_System_Boolean_) method of [WorksheetImpl](https://help.syncfusion.com/cr/file-formats/Syncfusion.XlsIO.Implementation.WorksheetImpl.html). The following code illustrates this.
+XlsIO allows finding values with matching case for specific column in Excel worksheet using **MatchCase** option of [ExcelFindOptions](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.ExcelFindOptions.html) enumeration through [Find](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.Implementation.WorksheetImpl.html#Syncfusion_XlsIO_Implementation_WorksheetImpl_Find_Syncfusion_XlsIO_IRange_System_String_Syncfusion_XlsIO_ExcelFindType_Syncfusion_XlsIO_ExcelFindOptions_System_Boolean_) method of [WorksheetImpl](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.Implementation.WorksheetImpl.html). The following code illustrates this.
 
 {% tabs %}  
 {% highlight c# tabtitle="C# [Cross-platform]" %}
@@ -82,11 +82,11 @@ End Using
 
 ## See Also
 
-* [How to opening an existing workbook?](https://help.syncfusion.com/file-formats/xlsio/loading-and-saving-workbook#opening-an-existing-workbook)
-* [How to perform Find and Replace?](https://help.syncfusion.com/file-formats/xlsio/worksheet-cells-manipulation#find-and-replace)
-* [How to get entire column of the particular range?](https://help.syncfusion.com/file-formats/xlsio/worksheet-cells-manipulation#entire-column)
-* [How to define discontinuous ranges?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-define-discontinuous-ranges)
+* [How to opening an existing workbook?](https://help.syncfusion.com/document-processing/excel/excel-library/net/loading-and-saving-workbook#opening-an-existing-workbook-from-stream)
+* [How to perform Find and Replace?](https://help.syncfusion.com/document-processing/excel/excel-library/net/worksheet-cells-manipulation#find-and-replace)
+* [How to get entire column of the particular range?](https://help.syncfusion.com/document-processing/excel/excel-library/net/worksheet-cells-manipulation#entire-column)
+* [How to define discontinuous ranges?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-define-discontinuous-ranges)
 * [How to create and open Excel Template files by using XlsIO?](how-to-create-and-open-excel-template-files-by-using-xlsio)
 * [How to copy a range from one workbook to another?](how-to-copy-a-range-from-one-workbook-to-another)
 * [How to sort two or more columns in a pivot table?](how-to-sort-two-or-more-columns-in-a-pivot-table)
-* [How to move or copy a worksheet?](https://help.syncfusion.com/file-formats/xlsio/working-with-excel-worksheet#move-or-copy-a-worksheet)
+* [How to move or copy a worksheet?](https://help.syncfusion.com/document-processing/excel/excel-library/net/worksheet/move-or-copy)
diff --git a/...ent-Processing/Excel/Excel-Library/NET/faqs/how-to-format-text-within-a-cell.md b/...ent-Processing/Excel/Excel-Library/NET/faqs/how-to-format-text-within-a-cell.md
@@ -108,9 +108,9 @@ End Using
 
 ## See Also
 
-* [How to set a line break inside a cell?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-set-a-line-break-inside-a-cell)
-* [How to protect certain cells in a worksheet?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-protect-certain-cells-in-a-worksheet)
-* [How to copy/paste the cell values that contain only formula?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-copy-paste-the-cell-values-that-contain-only-formula)
-* [How to rich-text formatting?](https://help.syncfusion.com/file-formats/xlsio/working-with-cell-or-range-formatting#rich-text-formatting)
-* [How to apply number formats?](https://help.syncfusion.com/file-formats/xlsio/working-with-cell-or-range-formatting#apply-number-formats)
-* [How to apply cell text alignment?](https://help.syncfusion.com/file-formats/xlsio/working-with-cell-or-range-formatting#apply-cell-text-alignment)
+* [How to set a line break inside a cell?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-set-a-line-break-inside-a-cell)
+* [How to protect certain cells in a worksheet?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-protect-certain-cells-in-a-worksheet)
+* [How to copy/paste the cell values that contain only formula?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-copy-paste-the-cell-values-that-contain-only-formula)
+* [How to rich-text formatting?](https://help.syncfusion.com/document-processing/excel/excel-library/net/working-with-cell-or-range-formatting#rich-text-formatting)
+* [How to apply number formats?](https://help.syncfusion.com/document-processing/excel/excel-library/net/working-with-cell-or-range-formatting#apply-number-formats)
+* [How to apply cell text alignment?](https://help.syncfusion.com/document-processing/excel/excel-library/net/working-with-cell-or-range-formatting#apply-cell-text-alignment)
diff --git a/...ary/NET/faqs/how-to-merge-cells-preserving-topleft-value-and-format-in-xlsio.md b/...ary/NET/faqs/how-to-merge-cells-preserving-topleft-value-and-format-in-xlsio.md
@@ -0,0 +1,61 @@
+---
+title: How to merge cells preserving cell value and formatting | Syncfusion
+description: Shows how to merge a range so only the top-left cell's value is kept and its formatting applied to the merged region using Syncfusion XlsIO.
+platform: document-processing
+control: XlsIO
+documentation: UG
+---
+
+# How to merge cells preserving top left cell value and formatting?
+
+To merge cells in Excel while preserving only the top-left cell’s value and extending its formatting across the entire merged range, you can use the Range.Merge(true) method. This approach ensures that all other cells within the selected region are cleared, while the content and style of the top-left cell are retained and applied uniformly to the merged area.
+
+The following code examples shows how to merge cells preserving cell value and formatting using C# (cross-platform and Windows-specific) and VB.NET.
+
+{% tabs %}
+{% highlight c# tabtitle="C# [Cross-platform]" %}
+using (ExcelEngine excelEngine = new ExcelEngine())
+{
+    IApplication application = excelEngine.Excel;
+    application.DefaultVersion = ExcelVersion.Xlsx;
+    IWorkbook workbook = application.Workbooks.Open(Path.GetFullPath(@"Data/InputTemplate.xlsx"));
+    IWorksheet worksheet = workbook.Worksheets[0];
+
+    // Merge: true preserves top-left value and copies top-left formatting to merged area
+    worksheet.Range["B8:C11"].Merge();
+
+    workbook.SaveAs(Path.GetFullPath(@"Output/Output.xlsx"));
+}
+{% endhighlight %}
+
+{% highlight c# tabtitle="C# [Windows-specific]" %}
+using (ExcelEngine excelEngine = new ExcelEngine())
+{
+    IApplication application = excelEngine.Excel;
+    application.DefaultVersion = ExcelVersion.Xlsx;
+    IWorkbook workbook = application.Workbooks.Open(InputTemplate.xlsx");
+    IWorksheet worksheet = workbook.Worksheets[0];
+
+    // Merge the range and keep top-left value & formatting
+    worksheet.Range["B8:C11"].Merge(true);
+
+    workbook.SaveAs("Output.xlsx");
+}
+{% endhighlight %}
+
+{% highlight vb.net tabtitle="VB.NET [Windows-specific]" %}
+Using excelEngine As New ExcelEngine()
+    Dim application As IApplication = excelEngine.Excel
+    application.DefaultVersion = ExcelVersion.Xlsx
+    Dim workbook As IWorkbook = application.Workbooks.Open("InputTemplate.xlsx")
+    Dim worksheet As IWorksheet = workbook.Worksheets(0)
+
+    ' Merge the range and keep top-left value & formatting
+    worksheet.Range("B8:C11").Merge(True)
+
+    workbook.SaveAs("Output.xlsx")
+End Using
+{% endhighlight %}
+{% endtabs %}
+
+A complete working example in C# is present on <a href="https://github.com/SyncfusionExamples/XlsIO-Examples/tree/1010768-Merge-Cells/FAQ/Merge%20Cells%20Formatting/.NET/Merge%20Cells%20Formatting">this GitHub page</a>.
diff --git a/...ing/Excel/Excel-Library/NET/faqs/how-to-overcome-unauthorizedaccessexception.md b/...ing/Excel/Excel-Library/NET/faqs/how-to-overcome-unauthorizedaccessexception.md
@@ -14,7 +14,7 @@ First, check whether you can access the folder and the file directly. Then, righ
 
 ## See Also
 
-* [How to overcome StackOverflow exception with IWorksheet Calculate()?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-overcome-stackoverflow-exception-with-iworksheet-calculate)
-* [How to avoid exception when adding worksheets with same name?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-avoid-exception-when-adding-worksheets-with-same-name)
-* [What are the known exceptions of XlsIO?](https://help.syncfusion.com/file-formats/xlsio/known-exceptions)
-* [How to secure Excel documents?](https://help.syncfusion.com/file-formats/xlsio/security)
+* [How to overcome StackOverflow exception with IWorksheet Calculate()?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-overcome-stackoverflow-exception-with-iworksheet-calculate)
+* [How to avoid exception when adding worksheets with same name?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-avoid-exception-when-adding-worksheets-with-same-name)
+* [What are the known exceptions of XlsIO?](https://help.syncfusion.com/document-processing/excel/excel-library/net/known-exceptions)
+* [How to secure Excel documents?](https://help.syncfusion.com/document-processing/excel/excel-library/net/security)