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Merge DOTM Files in .NET

.NET documents merger API to combine multiple DOTM files into a single file by joining selective number of pages or a range of specific pages from multiple source documents into a single resultant document. Merge all popular documents and image file formats including HTML, DOTM, Text, OpenDocument, Microsoft Word, Excel, PowerPoint, Visio and OneNote. Using Conholdate.Total APIs, protect your merged DOTM files to ensure the confidentiality of sensitive information within. Check if uploaded DOTM documents are password-protected. For unprotected ones, set strong, unique passwords using industry best practices. Remember to update passwords for existing files and remove them when documents become public.

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Add Watermark to Merged DOTM Files

Join DOTM files in .NET and add watermarks to the resultant DOTM document in any .NET based application without using any external API or software.

  • Instantiate Merger with DOTM document
  • Call Join method of Merger class instance and pass second source document (DOTM) path
  • Call Save method of Merger class instance to save merged document
  • Instantiate Watermarker with merged document as created above
  • Create the TextWatermark object & set watermark properties
  • Add watermark and save watermarked DOTM document

Download .NET DOTM Merger API

You require GroupDocs.Merger & GroupDocs.Watermark APIs to perform single and multiple documents merging operations within DOTM, Microsoft Office, HTML, OpenDocument and many other document formats.

Install the required assembly files directly from downloads and choose the package for your target platform to add Conholdate.Total for .NET directly in your workspace.


Merge Word, Excel, PPTX Files to DOTM

Programmatically combine multiple types of documents such as Word (DOC/DOCX), Excel (XLS/XLSX) and PowerPoint (PPT/PPTX) into a single compact DOTM file in .NET Applications, keeping the same text, formatting and layout structure in the resultant document.

  • Instantiate Merger with input DOTM document
  • Call Join method of Merger class instance and pass document paths one by one
  • Call Save method to merge all documents as one DOTM file

DOTM Pages Image Representation

Combine DOTM documents and generate image representation of the merged document pages in PNG, JPG or BMP formats. You can easily preview the complete document as a whole or display some specific pages based on page numbers or selective page ranges.

Join DOTM and other popular document file formats on different operating systems such as Windows, Linux or macOS while using platforms such as Windows Azure, Mono and Xamarin.


What is DOTM file format?

The DOTM file format is a file format developed by Microsoft to be used in conjunction with the Office Open XML file formats. The DOTM file format is not compatible with other Office formats such as DOCX and PPTX, so it needs to be converted before it can be used. The DOTM file format contains documents, templates, and macros that can be used to automate tasks within Microsoft Office applications. It is used to store information that is shared between Office applications. The DOTM file format was introduced in the Office 2007 and the later releases of the Office suite. With DOTM files, users can create a template, add macros to it, and save it for use in any Office application. This allows for quick and easy sharing of data across multiple applications. Furthermore, it also ensures that all Office applications can access the same data, making it easier to collaborate on projects. The DOTM file format is useful for quickly creating templates and macros that can be used across multiple Office applications. It also allows users to store data securely, making sure that only authorized personnel can access it. Finally, it helps to ensure that users can quickly and easily share data across different Office applications.

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Popular Document Merger Options with .NET

Merge WORD Files

(Word Processing Files)

Merge DOC Files

(Microsoft Word Binary Format)

Merge DOCX Files

(Office 2007+ Word Document)

Merge DOCM Files

(Microsoft Word 2007 Marco File)

Merge DOT Files

(Microsoft Word Template Files)

Merge DOTM Files

(Microsoft Word 2007+ Template File)

Merge DOTX Files

(Microsoft Word Template File )

Merge ODT Files

(OpenDocument Text File Format)

Merge OTT Files

(OpenDocument Standard Format)

Merge RTF Files

(Rich Text Format)

Merge TXT Files

(Text Document)

Merge HTML Files

(Hyper Text Markup Language)

Merge MHT Files

(MHTML Web Archive)

Merge MHTML Files

(Web Page Archive Format)

Merge PDF Files

(Portable Document Format)

Merge XPS Files

(XML Paper Specifications)

Merge TEX Files

(LaTeX Source Document)

Merge PS Files

(PostScript File)

Merge OTP Files

(OpenDocument Standard Format)

Merge POT Files

(Microsoft PowerPoint Template Files)

Merge POTM Files

(Microsoft PowerPoint Template File)

Merge POTX Files

(Microsoft PowerPoint Template Presentation)

Merge PPS Files

(PowerPoint Slide Show)

Merge PPSM Files

(Macro-enabled Slide Show)

Merge PPSX Files

(PowerPoint Slide Show)

Merge PPT Files

(Microsoft PowerPoint 97-2003)

Merge PPTM Files

(Macro-enabled Presentation File)

Merge PPTX Files

(Open XML presentation Format)

Merge ODP Files

(OpenDocument Presentation Format)

Merge OTP Files

(OpenDocument Standard Format)

Merge EXCEL Files

(Spreadsheet Files)

Merge CSV Files

(Comma Seperated Values)

Merge ODS Files

(OpenDocument Spreadsheet)

Merge TSV Files

(Tab Seperated Values)

Merge XLS Files

(Microsoft Excel Spreadsheet (Legacy))

Merge XLSB Files

(Excel Binary Workbook)

Merge XLSM Files

(Macro-enabled Spreadsheet)

Merge XLSX Files

(Open XML Workbook)

Merge XLT Files

(Excel 97 - 2003 Template)

Merge XLTX Files

(Excel Template)

Merge XLTM Files

(Excel Macro-Enabled Template)

Merge XLAM Files

(Excel Macro-Enabled Add-In)

Merge ERR Files

(Error Report File)

Merge EPUB Files

(Open eBook File)

Merge VDX Files

(Vector Design eXchange)

Merge VSD Files

(Visio Drawing File)

Merge VSDM Files

(Visio Macro-Enabled Drawing)

Merge VSDX Files

(Visio Drawing)

Merge VSS Files

(Visio Stencil File)

Merge VSSM Files

(Visio SmartShape Master)

Merge VSSX Files

(Visio Stencil File)

Merge VST Files

(VST Audio Plugin)

Merge VSTM Files

(Visio Macro-Enabled Drawing Template)

Merge VSTX Files

(Visio Drawing Template)

Merge VSX Files

(Visio Stencil XML File)

Merge VTX Files

(Anim8or 3D Model)

Merge ONE Files

(OneNote Document)

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