TdxCustomMemData.Persistent Property

Provides access to record storage settings and related methods.

Declaration

delphi

property Persistent: TdxMemPersistent read; write;

Property Value

Type	Description
TdxMemPersistent

Contains record storage settings in a memory-based dataset.

Remarks

In addition to data import and export functionality, the TdxMemData component can store data in a DFM file.

You can use the Persistent.Option property to switch between available automatic data load modes. Refer to the TdxMemPersistent class description for detailed information on all available options.

Code Example: Delete All Records

The following code example deletes all records stored in a memory-based dataset:

Delphi
C++

delphi

if dxMemData1.Persistent.Option = poActive then
    dxMemData1.Persistent.Option := poNone;
  dxMemData1.Close;
  dxMemData1.Open;

cpp

if(dxMemData1->Persistent->Option == poActive)
    dxMemData1->Persistent->Option = poNone;
  dxMemData1->Close();
  dxMemData1->Open();