public object ExcuteScalar(string statementName, params DatabaseParameter[] dbParams)
{
try {
string sql = GenerateSql(statementName);
DatabaseAccess access = new DatabaseAccess(_conn);
return access.ExcuteScalar(sql, dbParams);
}
catch (Exception ex) {
throw new Exception(string.Format("Sql执行出错，节点名\"{0}\" ({1})", statementName, _sqlMapPath), ex);
}
}