TMtxDataset.ReadDataset Method

Reads the contents of underlying fields.

Pascal

procedure ReadDataset(ReadAsComplex: boolean = false);

Reads the contents of underlying fields, defined in VecColumns collection, and stores their contents in the corresponding VecColumns.Items[i].TVecColumn.Vector vectors. ReadDataset method performs a:

Single record read for all VecColumns[i] with ReadWriteMode set to wmRecord.
Numeric values read for all VecColumns[i] with ReadWriteMode set to wmColumn.

If the ReadAsComplex parameter is true then two consecutive dataset records are treated as real and imaginary part of complex number. By default, ReadAsComplex is false meaning each record in dataset is treated as one real number. The ReadAsComplex parameter is the same for all VecColumns.

See Also

TVecColumn.ReadDataSet

Example

procedure TForm1.FormCreate(Sender: TObject); begin MtxDataSet.Dataset := Table1; MtxDataSet.ReadDataset; end;

void __fastcall TForm1::FormCreate(TObject *Sender) { MtxDataSet->Dataset = Table1; MtxDataSet->ReadDataset(false); }

Alternatively, you can do a ReadDaset operation on individual fields (a lot slower when you're reading from multiple fields):

procedure TForm1.FormCreate(Sender: TObject); var i : Integer; begin MtxDataSet.Dataset := Table1; for i := 0 to MtxDataSet.VecColumns.Count - 1 do MtxDataSet.VecColumns[i].ReadDataset; end;

void __fastcall TForm1::FormCreate(TObject *Sender) { MtxDataSet->Dataset = Table1; for (int t=0; t<MtxDataset->VecColumns->Count; t++) MtxDataset->VecColumns->Items[t]->ReadDataset(false); }

TMtxDataset Class, TMtxDataset Members, MtxVecDBTools Namespace, public, Example, See Also

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