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Value displayed in the lookup control when a lookup value is not available.
Source position: dbctrls.pp line 945
published property TDBLookupComboBox.DisplayEmpty : string |
DisplayEmpty is a String property which contains the value displayed in the lookup when no records are available in the linked lookup dataset, or when the NullValueKey shortcut is pressed.
Use EmptyValue to specify a KeyField value automatically added to the ControlItems property when the linked lookup dataset contains no records. No entry is added to Controlitems when the value in EmptyValue is an empty string (''). The value in DisplayEmpty is used for the ListField displayed in the control.
Use EmptyValue to specify the value stored in the lookup when no records are available in the linked lookup dataset, or when the NullValueKey shortcut is pressed.
The EmptyValue and DisplayEmpty properties were added in revision 62844, and released in LCL version 2.0.8 and higher.
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Value stored for the lookup control when a lookup value is not available. |
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Contains the items displayed for the lookup control. |
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ListField - the name of the list field displayed for the lookup. |
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The name of the KeyField used in the lookup search. |
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Keyboard shortcut which causes an empty value to be assigned to each of the key fields defined for the lookup control. |
| Version 3.2 | Generated 2024-02-25 | Home |