To save synchronously to a Nevron Binary Drawing local file call the SaveToLocalFile method of the drawing view. This method doesn't work on sandboxed platforms like Blazor WebAssembly.

drawingView.SaveToLocalFile(@"D:\Documents\MyDrawing.ndb");

To save a drawing to a file asynchronously call the SaveToFileAsync method of the drawing view. Calling this method shows a loader over the drawing view until the saving completes. The method returns a promise, which you can use to get notified when the saving completes.

drawingView.SaveToFileAsync(@"D:\Documents\MyDrawing.ndb").Then(
    delegate (bool success)
    {
    },
    delegate (Exception ex)
    {
    }
);

To save a drawing to a stream call the SaveToStream method of the drawing view and pass the drawing format to save to:

drawingView.SaveToStream(stream, NDrawingFormat.NevronBinary);

To show the standard Save File dialog, use the SaveAsAsync method:

drawingView.SaveAsAsync();

If you want a specific format to be selected by default, pass it as an argument:

drawingView.SaveAsAsync(NDrawingFormat.NevronBinary);

To load a Nevron Drawing synchronously from a local file call the LoadFromLocalFile method of the drawing view. This method doesn't work on sandboxed platforms like Blazor WebAssembly.

drawingView.LoadFromLocalFile(@"D:\Documents\MyDrawing.ndb");

To load a Nevron Drawing asynchronously call the LoadFromFileAsync method of the drawing view. Calling this method shows a loader over the drawing view until the loading completes. The method returns a promise, which can be used to get notified when the loading completes.

drawingView.LoadFromFileAsync(@"D:\Documents\MyDrawing.ndb").Then(
    delegate (bool success)
    {
    },
    delegate (Exception ex)
    {
    }
);

To load a drawing from a stream call the LoadFromStream method of the drawing view and pass the drawing format to load:

drawingView.LoadFromStream(stream, NDrawingFormat.NevronBinary);

The OpenFileAsync method shows an Open File dialog with all supported drawing formats:

drawingView.OpenFileAsync();

If you want a specific format to be selected by default, pass it as an argument:

drawingView.OpenFileAsync(NDrawingFormat.NevronBinary);

File Formats