SMART datagrid v.1 >  Classes >  DataField
DataLudi.DataField.emptyValue  property
当通过GridDataSet.getRowObject、TreeDataSet.getRowObject等而获取数据时,替代undefined而被返回的值。 
默认值为undefined.
- Getter
 - function emptyValue(): *
 - Setter
 - function setEmptyValue(value: *)
 
Code -1
    ds.setFields([{
        fieldName: 'qty',
        dataType: 'number',
        emptyValue: '0'
    },
    ...
    ]);
- See Also
 - GridDataSet.getRowObject
 - GridDataSet.getRowObjects
 - GridDataSet.getRowProps
 - GridDataSet.getRowsProps
 - TreeDataSet.getRowObject
 - TreeDataSet.getRowObjects
 - TreeDataSet.getRowProps
 - TreeDataSet.getRowsProps
 - DataField.nanValue
 - DataSet.nanValue
 
- Examples
 - 空值