继承自TCustomEdit的自定义控件，特点是增加了 NameDataField 属性， 与 原有的DataField属性构成一对. 通过设置ShowIdText, ShowNameText和NameDataField 属性，在控件获得焦点时，显示DataField值,离开焦点显示NameDataField值。这样一个控件显示了2个字段的内容，可以有效减少界面控件数量，使界面更加洁净。

举例: 显示供应商ID和供应商Name, 则DataField设置为SupplierId, NameDataField设为SupplierName,然后设置ShowNameText属性为True-The custom control inherited from TCustomEdit, characterized by an increase of NameDataField property, and the DataField property of the original form a pair. By setting ShowIdText, ShowNameText and NameDataField properties, the control gets focus, the display DataField value, leaving the focus show NameDataField value. Such a control displays the contents of two fields can be effective in reducing the number of interface controls, make the interface cleaner. For example: display supplier ID and supplier Name, then the DataField is set to SupplierId, NameDataField set SupplierName, property to True and then set the ShowNameText