Spire.Doc is a professional Word .NET library specifically designed for developers to create, read, write, convert and print Word document files from any .NET platform (C#, VB.NET, ASP.NET, .NET Core) and Java applications (J2SE and J2EE) with fast and high quality performance.

Wed Aug 22, 2012 2:57 pm

Hi e-iceblue,

is there a possability with Spire.Doc to detect the file format (doc, docx, rtf, etc...) by file content (not filename extension)?

Kind regards,

Posts: 3
Joined: Thu Aug 02, 2012 8:18 am

Thu Aug 23, 2012 3:12 am

Hi emediat,

Thanks for your support to us.

For the function"detect the file format (doc, docx, rtf, etc...) by file content (not filename extension)", Spire.Doc new version will support it. Once the version has released, we will inform you immediately. If you are anxious to use the function " detect the file format" now, you can refer to the following code. Hope it can help you.
Code: Select all
private FileFormat GetFileFormat(string fileName)
            FileFormat fileFormat = FileFormat.Doc;
            FileStream stream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
            stream.Position = 0L;
            byte[] buffer = new byte[5];
            if (((stream.Read(buffer, 0, 5) == 5) && (buffer[0] == 80))
                && (buffer[1] == 0x4b))
                stream.Position = 0L;
                return FileFormat.Docx;
            else if ((((buffer[0] == 0x7b) && (buffer[1] == 0x5c))
                && ((buffer[2] == 0x72) && (buffer[3] == 0x74)))
                && (buffer[4] == 0x66))
                stream.Position = 0L;
                return FileFormat.Rtf;
            return fileFormat;

If you have any probelms, please feel free to contact us.
Best wishes.
e-iceblue support
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Posts: 2429
Joined: Wed Jun 27, 2012 8:50 am

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