Microsoft Access Forms:
Data in a combo box control on a continuous form/datasheet disappears
Provided by: FMS Development Team
In a typical situation, you may have two combo boxes on a single form, such
that the second combo box relies on the selection from the first combo box.
For example, the first combo box contains a listing of all the states. When
you select the desired state, the second combo box contains all the cities
located in that state. There is nothing complicated with this situation.
However, when you attempt to apply this to a continuous form or a
continuous datasheet, the results may surprise you. What you will discover
is that your selections will disappear.
As Microsoft indicates:
Microsoft Access maintains only one query recordset for a combo box rather
than one recordset for each combo box in each record. When the criteria for
the query that the combo box is based on change, rows that were selected in
the other records may be eliminated from the recordset. As a result, the
non-BoundColumn values are no longer available to be displayed.
What if you still want to have a continuous form or continuous datasheet?
There is a method you can use to display the data in a continuous manner.
Click here to download a
demonstration.
What you will find in the demonstration application:
|
Form Object |
What is demonstrated |
| frmSoftware - Continuous Form |
Shows a simple example on how the data
disappears. |
|
frmSoftware – Single Form |
Shows a simple example on how the two combo
boxes work together on a single form. |
| frmSoftware, frmSoftwareDetails,
frmSoftwareSub |
Shows a simple example on how to show the
data in a continuous format without the data disappearing. |
|
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