SMART datagrid v.1 > Classes > DataOutputOptions
When exporting the value of DATETIME field, if the date value is null, it will be added as the string specified by this property.
If specify valueCallback or valueCallbacks, this value will be ignored.
Defaults to "".
var s = dsMain.exportToCsv({
datetimeFormat: 'yyyy-MM-dd',
nullDateText: '.',
quoted: true
});
DataLudi.saveTextToFile(s, 'dataludidata.csv');