diff --git a/src/CADShared/ExtensionMethod/DBDictionaryEx.cs b/src/CADShared/ExtensionMethod/DBDictionaryEx.cs
index 829b1ae9b5751da28ddb9335b6e18a956fe994e4..1b701fac16cea84b6a8ed2c82e914d8d7309fd4a 100644
--- a/src/CADShared/ExtensionMethod/DBDictionaryEx.cs
+++ b/src/CADShared/ExtensionMethod/DBDictionaryEx.cs
@@ -303,15 +303,17 @@ public static void SetValue(this DataCell cell, CellType type, object value)
     /// <param name="dict">字典</param>
     /// <param name="name">组名</param>
     /// <param name="ids">实体Id集合</param>
+    /// <param name="selectable">组内所有图元能否被一起选中</param>
+    /// <param name="description">编组的描述</param>
     /// <returns>编组Id</returns>
-    public static ObjectId AddGroup(this DBDictionary dict, string name, ObjectIdCollection ids)
+    public static ObjectId AddGroup(this DBDictionary dict, string name, ObjectIdCollection ids, bool selectable = true, string description = "")
     {
         if (dict.Contains(name))
             return ObjectId.Null;
 
         using (dict.ForWrite())
         {
-            Group g = new();
+            var g = new Group(description,selectable);
             g.Append(ids);
             dict.SetAt(name, g);
             var tr = DBTrans.GetTopTransaction(dict.Database);
@@ -326,14 +328,16 @@ public static ObjectId AddGroup(this DBDictionary dict, string name, ObjectIdCol
     /// <param name="dict">字典</param>
     /// <param name="name">组名</param>
     /// <param name="ids">实体Id集合</param>
+    /// <param name="selectable">组内所有图元能否被一起选中</param>
+    /// <param name="description">编组的描述</param>
     /// <returns>编组Id</returns>
-    public static ObjectId AddGroup(this DBDictionary dict, string name, IEnumerable<ObjectId> ids)
+    public static ObjectId AddGroup(this DBDictionary dict, string name, IEnumerable<ObjectId> ids, bool selectable = true, string description = "")
     {
         if (dict.Contains(name))
             return ObjectId.Null;
 
         using ObjectIdCollection idc = new(ids.ToArray()); //需要using吗? 暂无测试
-        return dict.AddGroup(name, idc);
+        return dict.AddGroup(name, idc, selectable, description);
     }
 
 
diff --git a/src/CADShared/Runtime/Env.cs b/src/CADShared/Runtime/Env.cs
index 024eb5d45d3f3c49fa1583349ebfeaba8b5fdad8..1e89e8bb670dafab53f630f47d3cb9aabd6a60bf 100644
--- a/src/CADShared/Runtime/Env.cs
+++ b/src/CADShared/Runtime/Env.cs
@@ -289,7 +289,7 @@ public static ObjectId GetDimblkId(DimblkType dimblk)
         var oldDimblk = Acaop.GetSystemVariable("dimblk");
         Dimblk = dimblk;
         var id = HostApplicationServices.WorkingDatabase.Dimblk;
-        Acaop.SetSystemVariable("dimblk", oldDimblk);
+        Acaop.SetSystemVariable("dimblk", oldDimblk.ToString() == "" ? "." : oldDimblk);
         return id;
     }