This assembly is designed to allow users to read common file properties including title, author, company, created time and modified time from common recent Office file formats.

Supported formats include:

• Microsoft Word (DOC, DOCX)
• Microsoft Excel (XLS, XLSX)
• Microsoft Access (MDB, ACCDB)
• Microsoft PowerPoint (PPT, PPTX)

For Word, Excel, and PowerPoint, this class manipulates file properties directly using DSOFile and the Open XML SDK so it is much faster than the interop classes.

1. NET Framework 4.5
2. One of the following installed on computer if Access databases will be used:
   • Microsoft Access MSI-based install (not Microsoft Office 365 or click-to-run-based Microsoft Office version)
   • Microsoft Access Database Engine 2016 Redistributable if Microsoft Office 365 or a click-to-run-based Microsoft Office version is not installed on the system
   • Microsoft Access 2010 Database Engine Redistributable if Microsoft Office 365 or a click-to-run-based Microsoft Office version is installed on the system due to compatibility issues with click-to-run
   • Click2Run-based installations of Microsoft Office or the runtime redistributables, like the Office 365 Access Runtime are not compatible with the DAO interop classes used by this code.
   • You may need to install the 32-bit version of Access or the database engine. 64-bit versions of the Access database engine are known not to be recognized by IIS.

This project is available on NuGet.

To interact with Access databases from IIS, two configuration changes must be made on your application pool:

1. Enable 32-Bit Applications must be set to True for the Access database engine COM object to be recognized
2. Load User Profile must be set to True or the IIS worker process will crash when accessing Access databases

These changes are only required if Access databases are to be accessed using OfficeFileProperties.

1. Add OfficeFileProperties.dll as a reference in your project or place it in the \bin folder.
2. Add the dependency OpenXMLSDK-MOT as a reference in your project or place its DLLs DocumentFormat.OpenXml.dll and System.IO.Packaging.dll in the \bin folder.
3. If you wish to use Office 97-2003 files, add the dependency NPOI as a reference in your project or place its DLL in the \bin folder
4. If you wish to use Access databases, ensure the Access Runtime is installed on the computer.

The below code block will show you how to access properties including creation time, modification time, author, company, title, and custom properties set on the document.

using (var fsFile = new OfficeFile(fullFileName))
{
    var fsProperties = fsFile.GetFileProperties();
    
    submissionFile.CreatedTimeLocal = fsProperties.CreatedTimeLocal;
    submissionFile.ModifiedTimeLocal = fsProperties.ModifiedTimeLocal;
    submissionFile.Author = fsProperties.Author;
    submissionFile.Company = fsProperties.Company;
    submissionFile.Title = fsProperties.Title;
    submissionFile.CustomProperties = fsProperties.CustomPropertiesString;
}

The Office 365 version of Access 2016 introduced support for the BigInt (Large Number) data type in version 16.0.7812. When this data type is used, the database format is automatically upgraded to v16.7. MSI-based installations of Access 2016 and the Microsoft Access Database Engine 2016 Redistributable cannot open these databases and will thrown an exception with error code 0x800A0F74. The only solution is believed to be to install an MSI-based version of Office 2019.