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

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!

Thanks for your inquiry. You can use DetectFileFormat method in this case. Please see the following link for more information.
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";
    case LoadFormat.Docx:
        outputFormat = SaveFormat.Docx;
        extension = ".docx";
    case LoadFormat.Html:
        outputFormat = SaveFormat.Html;
        extension = ".html";
    case LoadFormat.Rtf:
        outputFormat = SaveFormat.Rtf;
        extension = ".rtf";
    case LoadFormat.WordML:
        outputFormat = SaveFormat.WordML;
        extension = ".xml";
// Save document
doc.Save(String.Format(@"Test131\out{0}", extension), outputFormat);

Hope this helps.
Best regards.

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?

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,

This helps very much! Thank you.

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,