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How to export OLE icon to image using .NET

Hello,

I want to edit the embedded file inside a DOC file in .NET. I’m currently doing it by adding the edited file as a new node then remove the old shape node

var doc = new Document(inputFile);
DocumentBuilder docBuilder = new DocumentBuilder(doc);
foreach(Shape shape in doc.GetChildNodes(NodeType.Shape, true).ToArray())
{
    if(shape.OleFormat?.IsLink == false)
    {
        // Extract the file
        string embeddedFile = @"C:\tmp\embeddedFile.xls";
        shape.OleFormat.Save(embeddedFile);

        // Do something with the file

        // Add it back
        docBuilder.MoveTo(shape);
        var oleIcon = shape.OleFormat.OleIcon;
        shape.Remove();
        docBuilder.InsertOleObject(embeddedFile, false, oleIcon, null); // Or InsertOleObjectAsIcon
    }
}

Unfortunately I couldn’t find a way to get the original icon in the shape node. If I leave the last parameter to InsertOleObject as null then the default Aspose icon will be used. Can you please tell me how to do that?

@dunghnguyen

You need to pass the last parameter of InsertOleObject to get the desired output.

Following code example shows how to render the shape to image and set it for OLE. Hope this helps you.

var doc = new Document(MyDir + "inputOLE.docx");
DocumentBuilder docBuilder = new DocumentBuilder(doc);
foreach (Shape shape in doc.GetChildNodes(NodeType.Shape, true).ToArray())
{
    if (shape.OleFormat?.IsLink == false)
    {
        // Extract the file
        string embeddedFile = MyDir + @"embeddedFile.docx";
        shape.OleFormat.Save(embeddedFile);
        MemoryStream stream = new MemoryStream();
        shape.GetShapeRenderer().Save(stream, new ImageSaveOptions(SaveFormat.Png));

        // Do something with the file

        // Add it back
        docBuilder.MoveTo(shape);
        var oleIcon = shape.OleFormat.OleIcon;
        //shape.Remove();
        Image img = Image.FromStream(stream);
        docBuilder.InsertOleObject(embeddedFile, false, oleIcon, img); // Or InsertOleObjectAsIcon
    }
}
doc.Save(MyDir + "20.7.docx");
1 Like

@tahir.manzoor

Thanks. It works great. But I still have a problem that the size after inserting the object is slightly bigger from the original file. Everything is scaled up a little bit even though I copied the size from the original one

docBuilder.MoveTo(shape);
newShape = docBuilder.InsertOleObject(embeddedFile, false, oleIcon, img);
newShape.CoordOrigin = shape.CoordOrigin;
newShape.CoordSize = shape.CoordSize;
shape.Remove();

Please see the demo. It’s easier to notice for big images but even small icons became bigger

bigger after inserting.png (61.1 KB)

So how can I keep the size the same as before

Sample file:

sample.zip (485.5 KB)

@dunghnguyen

Please use the latest version of Aspose.Words for .NET 20.8 and check the size of shapes using MS Word in the input and output document.

If you still face problem, please get the original shape size before removing it and set height and width value to new shape. Hope this helps you.