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ADO The WillChangeRecord 与 Re
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The WillChangeRecord Event
WillChangeRecord事件
The WillChangeRecord event is triggered before one or more record changes.
WillChangeRecord事件是在一个或多个记录被更改前激发的。
Note: Before this event returns, set the status parameter to adStatusCancel to cancel the operation that caused this event or set it to adStatusUnwantedEvent to prevent subsequent notications.
注意：在返回这个事件之前，将status[状态]参数设置为adStatusCancel可以取消运行该事件的操作程序；或者将其设置为adStatusUnwantedEvent可以阻止接下来一系列的通告提示。
The RecordChangeComplete Event
RecordChangeComplete事件
The RecordChangeComplete event is triggered after one or more record have been changed.
RecordChangeComplete事件是在一个或多个记录被更改后激发的。
Note: Before this method returns, set the status parameter to adStatusUnwantedEvent to prevent subsequent notifications.
注意：在你返回这个方法之前，将status[状态]参数设置为adStatusUnwantedEvent可以阻止接下来一系列的通告提示。
Note: The WillChangeRecord event or the RecordChangeComplete event may occur if you change a field in a record using one of the following Recordset operations: Update, Delete, CancelUpdate, AddNew, UpdateBatch, and CancelBatch.
注意：如果使用下列记录集操作中的其中一个操作来改变一个记录中的一个字段的话，WillChangeRecord事件或RecordChangeComplete事件可能会被触发：Update、Delete、CancelUpdate、AddNew、UpdateBatch和CancelBatch。
Syntax
语法
WillChangeRecord reason,numrec,status,objRs RecordChangeComplete reason,numrec,objErr,status,objRs |
| Parameter参数 | Description描述 |
|---|---|
| reason | An EventReasonEnum value that specifies the reason for this event 指定一个EventReasonEnum值。它是用来指定事件激发的原因的 |
| numrec | Indicates the number of records affected 指定需要更改的记录数量 |
| status | An EventStatusEnum value that indicates the status of the execution of the event 指定一个EventStatusEnum值，用于指示事件执行的状态 |
| objErr | The name of an Error object that describes the error if status is set to adStatusErrorsOccurred, otherwise it is not set 指定一个错误对象的名称。如果status[状态]设置为adStatusErrorsOccurred，那么该对象将描述具体的错误信息 |
| objRs | The name of the Recordset Object that triggered this event 指定激发该事件的记录集对象的名称 |
EventReasonEnum Values
| Constant常量 | Value值 | Description描述 |
|---|---|---|
| adRsnAddNew | 1 | An operation added a new record |
| adRsnDelete | 2 | An operation deleted a record 指定一个删除一条记录的操作 |
| adRsnUpdate | 3 | An operation updated an existing record 指定一个更新现有记录的操作 |
| adRsnUndoUpdate | 4 | An operation reversed the update of a record 指定一个反向更新记录的操作 |
| adRsnUndoAddNew | 5 | An operation reversed the addition of a new record 指定一个发祥添加一条新记录的操作 |
| adRsnUndoDelete | 6 | An operation reversed the deletion of a record 指定一个反向删除记录的操作 |
| adRsnFirstChange | 11 | An operation made the first change to a record 指定一个用于第一次改变记录的操作 |
EventStatusEnum Values
| Constant常量 | Value值 | Description描述 |
|---|---|---|
| adStatusOK | 1 | The operation that caused the event was successful 激发事件操作成功 |
| adStatusErrorsOccurred | 2 | The operation that caused the event failed 激发事件操作失败 |
| adStatusCantDeny | 3 | The operation that caused the event cannot be cancelled 不可以取消正处于处理执行中的操作 |
| adStatusCancel | 4 | The operation that caused the event is cancelled 取消激发事件的操作 |
| adStatusUnwantedEvent | 5 | Prevents subsequent notifications before the event method has finished executing 在时间的运行方法终止运行之前禁止后续的报告 |
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