onDataChang事件

在写一个数据库应用的时候发现:

如果DBgrid1.datasource为Datasource1,

则执行

DBgrid1.columns[0].width:=40

将会触发datasource1的onDataChange事件.

迷惑中查找delphi help,说明如下:

Occurs when the data in a record has changed, either due to field edits or moving the cursor to a new record.

Methods that can trigger this event include the Next or Prior methods for the dataset. Data-aware controls notify a data source of a data change when:

 1.Scrolling to a new record.
 2. Modifications to a field's data.