I am trying to use WW.Cad.NetStandard and I want to read in a .dwg file, find all the text entries and change them. After changing the entries I want to save the file as either a new .dwg file or in any format to display to the UI.

I currently have the following code:

DxfModel model = CadReader.Read("wwwroot\\images\\RS00010.dwg");

                foreach (DxfEntity entity in model.Entities)
                {
                    if (entity.EntityType == "TEXT")
                    {
                        DxfText value = entity as DxfText;

                    }
                }

Not sure how to change the text field and save it as a different file.

Any help is appreciated.

Hi,

You can set property DxfText.Text. Did you have a look at the documentation?

For writing DWG file you can use the DwgWriter class.

- Wout

Yes I did look at the documentation and I wasn't sure if it was that easy to change value.Text to what I want and it'd be associated with that current Entity. But it works now with the following code.

foreach (DxfEntity entity in model.Entities)
                {
                    if (entity.EntityType == "TEXT")
                    {
                        DxfText value = entity as DxfText;
                        //replace text with part number
                        value.Text = "R9C605";
                    }
                }

As for also trying to save to a new file, I've decided I want to save it as a .PNG which I don't think DWGWriter would be the right class to call. I am currently using the following code:

string outfile = Path.GetFullPath(Path.Combine(_hostingEnvironment.WebRootPath, "images", "RSView.png"));
                Stream stream;
                Size maxSize = new Size(250, 250);
                Image<Bgra32> bitmap = ImageExporter.CreateAutoSizedBitmap<Bgra32>(model, Matrix4D.Identity,GraphicsConfig.AcadLikeWithBlackBackground,maxSize);
                using (stream = System.IO.File.Create(outfile))
                {
                    ImageExporter.EncodeImageToPng(bitmap, stream);
                }

Yes that looks correct. Can you attach the exported image so I can see it?

- Wout

Attached is the image, there is just a lot of extra space at the top.

I would like to trim it to it's minimum limits to show the image clearer and then display it on the webpage better.

Hi,

The bounding box is affected by the trial text, it will fit snug on the production version.

- Wout

Okay thank you.

In terms of licenses, which version would I need to purchase to perform all the actions I'm requiring; read, change, save/convert, display? Do I need Professional, or would I be okay with Standard or Basic?

Hi,

For the DWG reading you need the Professional edition.

- Wout