topic Re: Issue in filter selection in .NET Forum

Issue in filter selection

mehdi-guida — Tue, 03 Nov 2020 21:37:44 GMT

I have below codes. But it has error(image attached).

If i omit the line 'filterlist[1] = new TypedValue(67, s);' it works.

What is the issue?

Thank you

Editor editor = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;
LayoutManager layoutMgr = LayoutManager.Current;
string s = layoutMgr.CurrentLayout;
TypedValue[] filterlist = new TypedValue[2];
filterlist[0] = new TypedValue(2, "note");
filterlist[1] = new TypedValue(67, s);
Autodesk.AutoCAD.EditorInput.SelectionFilter filter = new Autodesk.AutoCAD.EditorInput.SelectionFilter(filterlist);
PromptSelectionResult Promptentity = editor.SelectAll(filter);
SelectionSet sval = Promptentity.Value;

Re: Issue in filter selection

_gile — Tue, 03 Nov 2020 22:24:45 GMT

Hi,

Try this way:

var filter = new SelectionFilter(new[] { new TypedValue(2, "note"), new TypedValue(410, LayoutManager.Current.CurrentLayout) });

Re: Issue in filter selection

mehdi-guida — Wed, 04 Nov 2020 00:29:38 GMT

Thank you

But it works only for simple blocks.

if the blocks are dynamic , it can't select them.

Re: Issue in filter selection

_gile — Wed, 04 Nov 2020 06:33:14 GMT

You cannot directly filter dynamic blocs by name wit a selection filter. You have to check the Name of the DynamicBlockTableRecord of each block reference.

Assuming you want to get all blocks by name in the current layout BlockTableRecord, the simplest (and faster) way is to iterate through all entities in the current space.

Here's an example:

using (var tr = db.TransactionManager.StartTransaction()) { var curSpace = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForRead); foreach (ObjectId id in curSpace) { if (id.ObjectClass.DxfName == "INSERT") { var br = (BlockReference)tr.GetObject(id, OpenMode.ForRead); var btr = (BlockTableRecord)tr.GetObject(br.DynamicBlockTableRecord, OpenMode.ForRead); if (btr.Name == "note") { // do your stuff with the block reference } } } tr.Commit(); }

Another example with a separate method using Linq

static IEnumerable<ObjectId> GetAllCurrentSpaceBlocksByName(string blockName) { var db = HostApplicationServices.WorkingDatabase; using (var tr = db.TransactionManager.StartOpenCloseTransaction()) { var curSpace = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForRead); return curSpace .Cast<ObjectId>() .Where(id => id.ObjectClass.DxfName == "INSERT") .Select(id => (BlockReference)tr.GetObject(id, OpenMode.ForRead)) .Where(br => ((BlockTableRecord)tr.GetObject(br.DynamicBlockTableRecord, OpenMode.ForRead)).Name == blockName) .Select(br => br.ObjectId); } }