How to Determine If a Word Document Is Read-Only?

c#, office-interop, readonly

Solution

Are you sure you are actually talking about the File attribute (that can be set via the Windows file properties dialog)? If so, you can use `FileInfo.IsReadOnly`:

FileInfo fileInfo = new FileInfo(@"path\to\file");
if (fileInfo.IsReadOnly)
{
    // do something
}

otherwise, refer to this answer if another process is using the file.

Problem

I use Word.Interop to work with Word Document and let user to open a file from hard disk. Sometimes I get error saying that the file that user has chosen is readonly. How can I check if a file is readonly or not?

Original source

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