SaveAs MS-Word as docx instead of doc c#

Question

When i try to save a file with docx extension in winform C# and to open that i get exception:
"word cannot open the file because the file format does not match the file extension"

This is how i save the file:

object oMissing = Missing.Value;
Word.Application oWord = new Word.Application();
Word.Document oWordDoc = new Word.Document();
oWord.Visible = false;
oWordDoc = oWord.Documents.Add(ref oMissing, ref oMissing, ref oMissing, ref oMissing);  

Object oSaveAsFile = (Object)@"C:\test\FINISHED_XML_Template.docx";            
        oWordDoc.SaveAs(ref oSaveAsFile, ref oMissing, ref oMissing, ref oMissing,
ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing,
ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing,
ref oMissing, ref oMissing);

        oWordDoc.Close(false, ref oMissing, ref oMissing);
        oWord.Quit(ref oMissing, ref oMissing, ref oMissing);

Does the version of the Office COM interop libraries you're using actually support `docx` files? — Martin Costello, Apr 16 '14 at 21:27
In `SaveAs` method can you try to specify `Word.WdSaveFormat.wdFormatXMLDocument` as 2nd parameter value? — Ulugbek Umirov, Apr 16 '14 at 21:50

score 0 · Answer 1 · answered Apr 16 '14 at 21:34

0

This page suggests changing to using the Word.Application.SaveAs2() method.

http://social.msdn.microsoft.com/Forums/en-US/0d7a68c0-e2cd-41c0-9815-63f0fde0bc8d/converting-doc-to-docx?forum=worddev

answered Apr 16 '14 at 21:34

Martin Costello

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score 0 · Answer 2 · answered Jan 02 '19 at 15:44

See the answer in this link: Convert .doc to .docx using C#

Daves solution is like the below, but I have changed Daves code from CompatibilityMode:=WdCompatibilityMode.wdWord2010 to CompatibilityMode:=WdCompatibilityMode.wdWord2013 to be more up-to-date and to give you true docx (without compability mode).

public void ConvertDocToDocx(string path)
{
    Application word = new Application();

    if (path.ToLower().EndsWith(".doc"))
    {
        var sourceFile = new FileInfo(path);
        var document = word.Documents.Open(sourceFile.FullName);

        string newFileName = sourceFile.FullName.Replace(".doc", ".docx");
        document.SaveAs2(newFileName,WdSaveFormat.wdFormatXMLDocument, 
                         CompatibilityMode: WdCompatibilityMode.wdWord2013);

        word.ActiveDocument.Close();
        word.Quit();

        File.Delete(path);
    }
}

SaveAs MS-Word as docx instead of doc c#

2 Answers2