| # queryAndRead method | |
| [ReadResult](../../zircon/ReadResult-class.md) queryAndRead | |
| () | |
| ## Implementation | |
| ```dart | |
| ReadResult queryAndRead() { | |
| if (handle == null) { | |
| return const ReadResult(ZX.ERR_INVALID_ARGS); | |
| } | |
| return System.channelQueryAndRead(handle!); | |
| } | |
| ``` | |