topic Re: Changing the VP Color for a Layer on a drawing database. in .NET Forum

Changing the VP Color for a Layer on a drawing database.

Poncho_Slim — Wed, 31 Jan 2024 22:10:33 GMT

I am trying to open a drawing and access a layers VP Color field. I have gotten the Layers that I want to access and change, but the LayerTableRecord only has a Color field, and no VPColor field. I want to keep the Color of a layer as Red but show up in viewports as Cyan.

What can I do to do this?

Re: Changing the VP Color for a Layer on a drawing database.

Jeff_M — Wed, 31 Jan 2024 22:50:34 GMT

Have you looked at the GetViewportOverrides method of the LayerTableRecord? Set the color in the overrides you get from that.

Re: Changing the VP Color for a Layer on a drawing database.

Poncho_Slim — Thu, 01 Feb 2024 21:26:30 GMT

So I started to go down the direction of accessing the VP Color via this method.
The following code is my massively large approach to trying to change the VP Color for a Viewport on specified Layout.

I first start by gathering the layers that I want to remain Red.
I then attempt to get the Viewport in a Layout so I can try to change the VP Layer in that viewport for all the layers with a specified string that is not in my list of gathered Layers. I want to change the VP Colors for those layers to Cyan.

I ran some testing by going into a drawing, creating some DeltaBlocks, and linked them to a cloud. This then created two layers both for the DeltaBlock and the Cloud. I then went into a layout, clicked in the viewport, and changed the VP Layer for the DeltaBlock to Magenta. Going back into ModelSpace and it was still red.
Then I ran my code, and the Color for that deltablock was red, and the suspected "VP Color" I pulled was still also red. I was expecting for it to be magenta since I believe I have accessed the VP Color via the GetViewportOverrides using the Viewport I have pulled from the Layout. So I was expecting for the second output to be Magenta.

private void ViewportLayerHandling() { List<string> LayersToKeep = new List<string>(); DB_Sheet Sheet; LayerTable layerTable; ObjectId ViewportID; foreach (DataGridViewRow Row in PlanSheetsAvailableTable.Rows) { LayersToKeep.Clear(); // Gather the Layers to Keep // Go through the Deltas for (int i = 0; i < DeltaSheets.Length; i++) { Sheet = DeltaSheets[i].Item2; // Get the Deltas only for the RSSheet if (Sheet.sheetNumber == Row.Cells[SheetNumColumnIndex].Value.ToString()) { DB_Delta Delta = DeltaSheets[i].Item1; string Handle = Delta.handle; string FilePath = $"{Sheet.fullPath}\\{Sheet.fileName}"; Database db = OpenDrawingFile(FilePath); // False = Project is opened in the background ObjectId DeltaBlock = GetBlockIdByHandle(db, Handle); using (Transaction tr = db.TransactionManager.StartTransaction()) { // Pull its BlockLayer BlockReference Block = tr.GetObject(DeltaBlock, OpenMode.ForRead) as BlockReference; layerTable = tr.GetObject(db.LayerTableId, OpenMode.ForRead) as LayerTable; LayerTableRecord BlockLayer = tr.GetObject(Block.LayerId, OpenMode.ForWrite) as LayerTableRecord; Debug.Print($"Block Name:{Block.Name}"); Debug.Print($"Block Layer Name:{BlockLayer.Name}"); // Add it to the list LayersToKeep.Add(BlockLayer.Name); Debug.Print($"Block Layer:{BlockLayer.Color}"); try { // Get the Cloud Layer and also add it to the list ObjectId CloudLayerId = layerTable[$"{BlockLayer.Name}-Cloud"]; LayerTableRecord CloudLayer = tr.GetObject(CloudLayerId, OpenMode.ForWrite) as LayerTableRecord; Debug.Print($"Cloud Layer Name:{CloudLayer.Name}"); LayersToKeep.Add(CloudLayer.Name); } catch (Autodesk.AutoCAD.Runtime.Exception ex) { Debug.Print($"LayerNotFound:{ex.Message}"); } } } } // Go through the Drawing, and for every Delta that is not in the List foreach (string LayerName in LayersToKeep) { Debug.Print($"LayerName in List:{LayerName}"); } Debug.Print("-------------------------------------------------"); // Get the Document Sheets.TryGetValue(Row.Cells[SheetNumColumnIndex].Value.ToString(), out Sheet); // Get the Deltas only for the RSSheet if (Sheet.sheetNumber == Row.Cells[SheetNumColumnIndex].Value.ToString()) { // Open the drawing string FilePath = $"{Sheet.fullPath}\\{Sheet.fileName}"; Database db = OpenDrawingFile(FilePath); // False = Project is opened in the background ViewportID = db.ViewportTableId; using (Transaction tr = db.TransactionManager.StartTransaction()) { // Open the Layout Dictionary DBDictionary LayoutList = tr.GetObject(db.LayoutDictionaryId, OpenMode.ForRead) as DBDictionary; // Go through the Layouts foreach (DBDictionaryEntry layoutId in LayoutList) { // Get the Layout Layout layout = tr.GetObject(layoutId.Value, OpenMode.ForRead) as Layout; // When the Layout is correct if (layout.LayoutName == Row.Cells[SheetNumColumnIndex].Value.ToString()) { // Get the Layouts's BlockTableRecord BlockTableRecord LayoutBlockTableRecord = tr.GetObject(layout.BlockTableRecordId, OpenMode.ForRead) as BlockTableRecord; // Go through the Sheet BlockTable foreach (ObjectId ID in LayoutBlockTableRecord) { // Try to pull the Viewport from the Layout BlockTable Viewport vp = tr.GetObject(ID, OpenMode.ForRead) as Viewport; if (vp != null) { // This is believed to be a Viewport in a Sepcified Layout Debug.Print($"vp.BlockName:{vp.BlockName}"); Debug.Print($"vp.BlockId:{vp.BlockId}"); // Save the ID for the suspected Viewport ViewportID = vp.BlockId; } } } } // Get the LayerTable layerTable = tr.GetObject(db.LayerTableId, OpenMode.ForRead)as LayerTable; // Go through the layers SymbolTableEnumerator layerEnumerator = layerTable.GetEnumerator(); while (layerEnumerator.MoveNext()) { // Get the layer LayerTableRecord currentLayer = tr.GetObject(layerEnumerator.Current, OpenMode.ForRead) as LayerTableRecord; // Check the Layer by the Name if (currentLayer.Name.Contains("Delta$-") && !LayersToKeep.Contains(currentLayer.Name)) { // Access the Data on the Layer Debug.Print($"CurrentLayerName:{currentLayer.Name}"); Debug.Print($"CurrentLayerColor:{currentLayer.Color}"); Debug.Print($"CurrentLayerVPColor:{currentLayer.GetViewportOverrides(ViewportID).Color}"); //currentLayer.GetViewportOverrides(ViewportID).Color = Autodesk.AutoCAD.Colors.Color.FromRgb(0,255,255); } } } } } }

*Moderator edit* Changed code window language to C#.

Re: Changing the VP Color for a Layer on a drawing database.

Jeff_M — Thu, 01 Feb 2024 21:53:35 GMT

Is this the whole code? I'm not seeing that you Commit() the transaction.

Re: Changing the VP Color for a Layer on a drawing database.

Poncho_Slim — Thu, 01 Feb 2024 22:31:11 GMT

this is correct, but I did not really try to make a change. The core of the code is to access the VP Color for the Layer within a Viewport. I would change the color on line 116 and then commit the transaction, but before that, I want to ensure that I am accessing the correct field by outputting the colors and comparing it to what I expected. Since the colors are not what I expected, I am under the impression that I am not in the correct area.

Re: Changing the VP Color for a Layer on a drawing database.

Jeff_M — Fri, 02 Feb 2024 23:25:03 GMT

Sorry, I was in a hurry and didn't carefully read your description nor the code. I can't really test the code since it uses information from a Form. Here is a very simple test that shows it does get the correct override. I created a layer named TestLayer, in a viewport I changed it's VPOverride to Red. The I set the current space to Paper and ran the following test code. It correctly reports this:

Command: TESTVPLAYER

Select Viewport: TestLayer VP Color Override in current VP is red

[CommandMethod("TestVPLayer")] public void testvplayer() { var doc = Application.DocumentManager.MdiActiveDocument; var db = doc.Database; var ed = doc.Editor; var entPrompt = new PromptEntityOptions("\nSelect Viewport"); entPrompt.SetRejectMessage("...not a Viewport! Try again."); entPrompt.AddAllowedClass(typeof(Viewport), true); var entSel = ed.GetEntity(entPrompt); if (entSel.Status != PromptStatus.OK) return; using (Transaction tr = db.TransactionManager.StartTransaction()) { var lt = (LayerTable)tr.GetObject(db.LayerTableId, OpenMode.ForRead); var layer = (LayerTableRecord)tr.GetObject(lt["TestLayer"], OpenMode.ForRead); var vp = (Viewport)tr.GetObject(entSel.ObjectId, OpenMode.ForRead); var vpOride = layer.GetViewportOverrides(vp.ObjectId); ed.WriteMessage("TestLayer VP Color Override in current VP is {0}", vpOride.Color.ColorNameForDisplay); } }