protected void btnDelete_Click(object sender, EventArgs e) { if (RadTreeView1.SelectedNode == null) { ShowError("Selecione uma categoria!"); return; } ProductManager manager = new ProductManager(this); ProductPart productPart = manager.GetProductPart(Convert.ToInt32(RadTreeView1.SelectedNode.Value)); try { manager.DeleteProductPart(productPart); } catch (Exception ex) { ShowError(ex.Message.ToString()); return; } BindTree(); }