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看BORLAND的帮助：

property ListField: String;

Description

The lookup control represents a field in one
table by displaying the value of one or more
corresponding fields in another table. ListField
is the name of the field or fields in the lookup
table that are actually displayed, as opposed to
the DataField, which is the field in the DataSource
that the lookup control actually represents, or the
KeyField, which is the field in the lookup table
with the same value as the DataField.

To fully specify the list fields, both a dataset for the lookup table and the fields within that dataset must be defined. The ListSource property of the lookup control specifies the dataset for the lookup table.

ListField can represent more than one field. Multiple field names should be separated by semicolons.

Before specifying ListField, specify the link between the two datasets using the KeyField property. If ListField is not set, lookup controls display KeyField field values by default. If the DataField field is a lookup field, don't specify anything for ListField; the data controls automatically use the lookup field's LookupResultField property as ListField.

property KeyField: String;

Description

Use KeyField to link the ListSource of the lookup control to the DataSource. Although the name of the field specified as the KeyField does not have to be the same as the name of the field specified as the DataField, the two fields must have the same values.

After specifying the ListField, choose which field the lookup control will actually display with the ListField property.

If the DataField field is a lookup field, don't specify anything for KeyField or ListField; lookup controls automatically use the data field's LookupKeyFields property for KeyField.

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作者：

ganbing (干冰)	★☆☆☆☆	-
	盒子活跃会员

2003/12/8 8:47:18

2楼：

ListField is the name of the field or fields in the lookup table that are actually displayed

KeyField, which is the field in the lookup table with the same value as the DataField.

Use KeyField to link the ListSource of the lookup control to the DataSource.

不习惯它的表达,不能理解确切的意思,请请指教啊

在这里,datasource 和datafield 是直接关联的一套吧,用在设定显示的那一栏中,
而listsource,listfield,keyfield是用于设定下拉栏的内容的,也许还怎么关联了一下datasource? 我的理解对么? 那他们到底如何关系?

晕了! 请指教!
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