JVCL Help:TJvCustomCsvDataSet.OnGetFieldData
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Event fired when field data is going to be provided to a data aware control.
Pascal
TJvCsvOnGetFieldData = procedure (Sender: TObject; UserTag: Integer; UserData: Pointer; FieldName: string; var Value: string) ofobject;
propertyOnGetFieldData: TJvCsvOnGetFieldData;
Parameters
| Parameters | Description |
| FieldName | The field name we are being asked for? |
| Value | var parameter - This is where you put the actual value (encoded as a CSV string) to be provided to the data aware control. |
| UserData | The record's data (pointer) property. Perhaps this is the custom object that contains the actual data? |
| Sender | Description for this parameter |
| UserTag | The record's tag (integer) property |
Description
An OnGetFieldData event written by the end user allows the end user to create a Virtual DataSet where the data in the CSV rows is really just a cache which can be updated when displayed but which we really are fetching from somewhere else.
See Also
TJvCustomCsvDataSet.OnSetFieldData, TJvCustomCsvDataSet.GetUserTag, TJvCustomCsvDataSet.SetUserTag, TJvCustomCsvDataSet.GetUserData, TJvCustomCsvDataSet.SetUserData
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