public override bool SaveData() { DataTable changes = GetSourceChange(); if (changes != null) { foreach (DataRow row in DataSource.Rows) { if (row.RowState == DataRowState.Added) { if (row["IsAdmin"] == null || row["IsAdmin"] == DBNull.Value) { row["IsAdmin"] = false; } } } return(service.BatchUpdateUser(DataSource)); } return(true); }