Merging PDF and DOCX in .NET: The Proper In-Memory Approach Without MS Office or Temporary Files
Consider a typical business scenario: you need to generate a final report for a client and deliver it as a single file. This report is compiled from various sources: A dynamic cover page (generated as a DOCX file from a template). Analytics, including charts (exported as a PDF from a third-party BI tool). A standard legal appendix (a static PDF). Your task as a developer is to seamlessly merge…
In the business world, generating a single final report that combines various sources such as dynamic cover pages, analytics in PDF format, and static legal appendices can be a complex task. Traditional approaches in .NET often involve using Microsoft Office Interop, creating temporary files, or simply concatenating byte arrays, leading to memory leaks, I/O bottlenecks, security risks, and corrupted files.
However, a more professional and efficient method involves merging documents in-memory using a unified Document Object Model (DOM). This article provides a step-by-step guide on how to achieve this using the Document .Net library by SautinSoft in C#. The first step involves preparing the source documents as byte arrays, which are then loaded into a master document without creating any files on disk.
The second step addresses font issues that may arise when loading PDFs on Linux servers, ensuring the document layout remains intact.
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