Add import primitives to cross-section

StructureHelperLogics/NdmCalculations/Primitives/Logics/GetPrimitivesByFile.cs

@@ -0,0 +1,24 @@
+using StructureHelperCommon.Services.Exports;
+
+namespace StructureHelperLogics.NdmCalculations.Primitives
+{
+    public class GetPrimitivesByFile : IGetPrimitivesLogic
+    {
+        private List<INdmPrimitive> primitives = [];
+
+        public string FileName { get; set; }
+        public List<INdmPrimitive> Primitives => primitives;
+
+        public void Import()
+        {
+            primitives.Clear();
+            var importEntitiesLogic = new EntitiesImportFromDxfLogic() { FileName = FileName};
+            importEntitiesLogic.Import();
+            if (importEntitiesLogic.Entities.Count != 0)
+            {
+                var primitivesLogic = new GetPrimitivesByDxfEntities();
+                primitives = primitivesLogic.Convert(importEntitiesLogic.Entities);
+            }
+        }
+    }
+}