How to remove password from Word Document in c#

Question

Dear All,

            i like to remove password from word document(.doc,.docx).

            please help

            thanks in advance

   

Answer 1

You can't. And the request to do so sounds very suspicious. The best you can do is to check to see if the file is password protected.

Answer 2

using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Wordprocessing;
 
using (WordprocessingDocument wd = WordprocessingDocument.Open(filename, false))
{
    DocumentProtection dp = wd.MainDocumentPart.DocumentSettingsPart.Settings.GetFirstChild<DocumentProtection>();
    if(dp != null && dp.Enforcement == BooleanValues.One && dp.Edit == DocumentProtectionValues.ReadOnly)
    {
        // Document is password protected for read only.
    }
}

Use like this

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Sivalingam

Answer 3

http://www.c-sharpcorner.com/Forums/Thread/61822/

code from this link :

	Microsoft.Office.Interop.Word.Application wordApp = new Microsoft.Office.Interop.Word.ApplicationClass(); 
        object nullobj = System.Reflection.Missing.Value; 
        string pass = "abcd1234"; 
        object password = pass; 
        object FName = fileName; 
        Microsoft.Office.Interop.Word.Document aDoc = null; 
        wordApp.Visible = false; 
        aDoc = wordApp.Documents.Open(ref FName, ref nullobj, ref nullobj, ref nullobj, ref password, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj); 
        aDoc.Activate(); 
        if (aDoc.HasPassword) 
        aDoc.Password = null; 
        if (aDoc.ProtectionType != wdProtectionType.wdNoProtection) 
        aDoc.Unprotect(ref password); 
        aDoc.SaveAs(ref FName, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj, ref nullobj); 
        aDoc.Close(ref nullobj, ref nullobj, ref nullobj); 

regards

joon

Answer 4

hi joon

Thanks for your reply

but when i implement this piece of code i got error

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

now what should I do?

thanks

Answer 5

Please have a look at the link(http://www.c-sharpcorner.com/Forums/Thread/61822/) which joon gave. This may helps. I copy it here:

Hi All, I use this above code to remove the password and unprotect my word document. But for some strange reason it works fine on some files but does not remove the password protection on some. Is there something I am missing? Thanks in advance. Rals Apologies for the wierd display.

got it. Word does not save any changes if it just has to do with password. One has to physically make some changes to the document for the Save doc to work. So just protected it again and then unprotected it and then saved it. Work fine now.

Answer 6

Harish, I hope it is your file, and you just forgot the password.  Basically, what are your intentions?  If your intentions are sound, I'll tell you how to do this.

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Ryan Shuell

Answer 7

the code works correctly and it opens documents when I am running but when I open documents again it asks me password .... I want remove the password once and for all