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TMtxDataset.ReadWriteMode Property
TMtxDataset Class | TMtxDataset Members | MtxVecDBTools Namespace | published | Example
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Defines how component will read/write values from/to dataset fields.

Pascal
property ReadWriteMode: TReadWriteMode;
Description

Defines how component will read/write values from/to dataset fields: 

 

  • If dataset fields are valid BLOB fields then set the ReadWriteMode to wmRecord. The ReadDataSet and WriteDataSet will read/write all vectors properties from/to dataset fields.
  • If dataset fields are numeric fields then set the ReadWriteMode to wmColumn. In this case ReadDataSet and WriteDataSet will read/write all vectors values from/to dataset field.
Notes

The ReadWriteMode does not actually check if dataset field type is correct. If you specify the wrong read/write mode an exception will be raised when you try to read/write from/to dataset.

Example

Connect MtxDataSet to Table1 and read complete vectors from two BLOB fields. 

 

procedure TForm1.FormCreate(Sender: TObject); begin MtxDataSet.Dataset := Table1; MtxDataSet.ReadWriteMode := wmRecord; MtxDataSet.VecColumns.Clear; MtxDataset.VecColumns.Add.FieldName := 'TimeAnalysis'; MtxDataset.VecColumns.Add.FieldName := 'FFTAnalysis'; end;
void __fastcall TForm1::FormCreate(TObject *Sender) { MtxDataSet->Dataset = Table1; MtxDataset->ReadWriteMode = wmRecord; MtxDataset->VecColumns->Clear(); TVecColumn *col; col = MtxDataset->VecColumns->Add(); col->FieldName = "TimeAnalysis"; col = MtxDataset->VecColumns->Add(); col->FieldName = "FFTAnalysis"; }
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