private void bindProjectData() { Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument; var tree = Project.Instance.GetProjectTree(doc); treeList1.DataSource = tree; //把非Name的列隐藏 if (treeList1.Columns.Count > 0) { for (int i = 0; i < treeList1.Columns.Count; i++) { if (treeList1.Columns[i].FieldName != "Name") { treeList1.Columns[i].Visible = false; } } } treeList1.ExpandToLevel(0); treeList1.ExpandToLevel(1); treeList1.ExpandToLevel(2); }