Gets or sets the data source member whose data is manipulated by the DataNavigator control.
A string value representing the data source member.
This property is used when the DataNavigator.DataSource property refers to a dataset containing several data tables. The DataMember property should specify the desired table's name in this case.
If the DataNavigator.DataSource property refers to a data table, data view or any custom created data source object, the DataMember property should not be used.