XLSX ODS HTML NUMBERS CSV
Aspose.Cells  for .NET
XLSM

Merge XLS to XLSM Formats in C#

Native and high performance document merger using server-side Aspose.Cells for .NET APIs, without the use of any software like Microsoft or Open Office, Adobe PDF.

Merge XLS to XLSM File Using C#

With Aspose.Cells for .NET library, you can easily merge XLS to XLSM file programmatically with a few lines of code. Aspose.Cells for .NET is capable of building cross-platform applications with the ability to generate, modify, convert, render and print all Excel files. .NET Excel API not only convert between spreadsheet formats, it can also render Excel files as images, PDF, HTML, ODS, CSV, SVG, JSON, WORD, PPT and more, thus making it a perfect choice to exchange documents in industry-standard formats. Open NuGet package manager, search for Aspose.Cells and install. You may also use the following command from the Package Manager Console.

Package Manager Console Command


PM> Install-Package Aspose.Cells

System Requirements

Our APIs are supported on all major platforms and Operating Systems. Before executing the code below, please make sure that you have the following prerequisites on your system.

  • Microsoft Windows or a compatible OS with .NET, .NET Core or Mono Platforms.
  • Development environment like Microsoft Visual Studio.
  • Our product is fully cross-platform and supports Windows, Linux, MacOS, Azure, AWS Lambda.

How to Merge XLS to XLSM File in C#

A basic document merging and concatenating with Aspose.Cells for .NET APIs can be done with just few lines of code.

  • Load the XLS file with Workbook class.
  • Call the Workbook.Combine method for merging files.
  • Call the Workbook.Save method and pass the output file name as a parameter.
  • Now you can open and use the output file in Microsoft Office, Adobe PDF or any other compatible program.
Free App to merge Excel files on line
Select two files
Output format
   
                                   
    
	
  using Aspose.Cells;     
  var workbook = new Workbook("Input.xlsx");
  workbook.Combine(new Workbook("Combine.xlsx");
  workbook.Save("Output.pdf");
	                
                
            

XLS What is XLS File Format

Files with XLS extension represent Excel Binary File Format. Such files can be created by Microsoft Excel as well as other similar spreadsheet programs such as OpenOffice Calc or Apple Numbers. File saved by Excel is known as Workbook where each workbook can have one or more worksheets. Data is stored and displayed to users in table format in worksheet and can span numeric values, text data, formulas, external data connections, images, and charts. Applications like Microsoft Excel lets you export workbook data to several different formats including PDF, CSV, XLSX, TXT, HTML, XPS, and several others. The XLS file format was replaced with a more open and structured format, XLSX, with the release of Microsoft Excel 2007. The latest versions still provide support for creating and reading XLS files, though XLSX is the first choice of use now.

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XLSM What is XLSM File Format

Files with XLSM extension is a type of Spreadsheet files that support Macros. From application point of view, a Macro is set of instructions that are used for automating processes. A macro is used to record the steps that are performed repeatedly and facilitates performing the actions by running the macro again. Macros are programmed with Microsoft’s Visual Basic for Applications (VBA) from within the Excel Workbook using the Visual Basic Editor and can be run/debug directly from there.

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Other Supported Merging Formats

Using C#, One can also merge xls to many other file formats including.

HTML (Hyper Text Markup Language)
MHTML (Web Page Archive Format)
ODS (OpenDocument Spreadsheet File)
TSV (Tab-Separated Values)
TXT (Text Document)
XLS (Excel Binary Format)
XLSB (Binary Excel Workbook File)
XLSM (Spreadsheet File)
XLSX (OOXML Excel File)
XLT (Microsoft Excel Template)
XLTM (Excel Macro-enabled Template)
XLTX (Office OpenXML Excel Template)