How to Save a MemoryStream document in same format used to open document

Aspose.Words Product Family
1

I have a document I’ve pulled from a database and put into a MemoryStream object. I have opened up the document and made the necessary changes, and now I want to save the document in the same format with which it was opened.

MemoryStream ms = getDocFromDatabase();
Aspose.Words.Document theDoc = new Aspose.Words.Document(ms);
// various and sundry processing
theDoc.Save(ms, ???);

I’m not sure I will know what the format should be. Is there some way to save in the same format that opened the document? There is Aspose.Words.SaveFormat.Odt, but I don’t think that that is what I’m looking for. There is also Aspose.Words.SaveFormat.None, but I don’t think that that is what I’m looking for. Would I parse the extension of the document and modify the save format accordingly?
Any assistance would be appreciated. Have a nice day!

2

Hi
Thanks for your inquiry. You can use DetectFileFormat method in this case. Please see the following link for more information.
https://reference.aspose.com/words/net/aspose.words/fileformatutil/detectfileformat/
Also here is code example:

byte[] fileBytes = File.ReadAllBytes(@"Test131\in.doc");
MemoryStream docStream = new MemoryStream(fileBytes);
// Detect format of input document
LoadFormat inputFormat = Document.DetectFileFormat(docStream);
// Open document
Document doc = new Document(docStream);
// Do something with document
DocumentBuilder builder = new DocumentBuilder(doc);
builder.Write("Hello world!!!");
// Detect output format 
SaveFormat outputFormat = SaveFormat.Doc;
string extension = ".doc";
switch (inputFormat)
{
    case LoadFormat.Doc:
        outputFormat = SaveFormat.Doc;
        extension = ".doc";
        break;
    case LoadFormat.Docx:
        outputFormat = SaveFormat.Docx;
        extension = ".docx";
        break;
    case LoadFormat.Html:
        outputFormat = SaveFormat.Html;
        extension = ".html";
        break;
    case LoadFormat.Rtf:
        outputFormat = SaveFormat.Rtf;
        extension = ".rtf";
        break;
    case LoadFormat.WordML:
        outputFormat = SaveFormat.WordML;
        extension = ".xml";
        break;
}
// Save document
doc.Save(String.Format(@"Test131\out{0}", extension), outputFormat);

Hope this helps.
Best regards.

3

This is still asking us to do the conversion manually.

Does a method exist to transform a LoadFormat to a SaveFormat value?

var saveformat = LoadToSaveFormat(doc.OriginalLoadFormat);
doc.Save(streamOut, saveformat);

Does Aspose provide a simple method in place of the LoadToSaveFormat call I put in the code?

4

Hi Jay,

Thanks for your inquiry.

Sure, you can convert a LoadFormat value to a SaveFormat value (if possible) by using the FileFormatUtil.LoadFormatToSaveFormat method. The following code snippet shows how to use the FileFormatUtil methods to detect the format of a document without any extension and save it with the correct file extension.

// Load the document without a file extension into a stream and
use the DetectFileFormat method to detect it’s format. These are both times
where you might need extract the file format as it’s not visible
FileStream docStream = File.OpenRead(MyDir + "Document.FileWithoutExtension"); // The file format of this document is actually ".doc"
FileFormatInfo info = FileFormatUtil.DetectFileFormat(docStream);
// Retrieve the LoadFormat of the document.
LoadFormat loadFormat = info.LoadFormat;
// Let's show the different methods of converting LoadFormat enumerations to SaveFormat enumerations.
//
// Method #1
// Convert the LoadFormat to a string first for working with. The string will include the leading dot in front of the extension.
string fileExtension = FileFormatUtil.LoadFormatToExtension(loadFormat);
// Now convert this extension into the corresponding SaveFormat enumeration
SaveFormat saveFormat = FileFormatUtil.ExtensionToSaveFormat(fileExtension);
// Method #2
// Convert the LoadFormat enumeration directly to the SaveFormat enumeration.
saveFormat = FileFormatUtil.LoadFormatToSaveFormat(loadFormat);
// Load a document from the stream.
Document doc = new Document(docStream);
// Save the document with the original file name, " Out" and the document's file extension.
doc.Save(MyDir + "Document.WithFileExtension Out" + FileFormatUtil.SaveFormatToExtension(saveFormat));

I hope, this helps.

Best regards,

5

This helps very much! Thank you.

6

Hi Jay,

Thanks for your feedback. Please let us know any time you have any further queries. We are always glad to help you.

Best regards,