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Afterupdate event on a field not working properly

Posted on 2012-03-21
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Last Modified: 2012-03-21
I have a date field on a form and for the afterupdate event I have:

Me.fieldname.defaultvalue = me.fieldname

But then when a new record is entered using the form, which has not been closed, I do not get the value of the previous record in the field.  Instead I get12/30/1899 even though the previous record’s value was 3/23/2012.

What is wrong with the code?

--Steve
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Question by:SteveL13
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Expert Comment

by:mbizup
ID: 37747028
Steve,

In order for the default value to "stick", it must be set in the property sheet (in the form's design), not just through code.
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Expert Comment

by:Dale Fye
ID: 37747043
Actually, the syntax should be:

me.controlname.defaultvalue = me.controlname

If you are not using a standard naming convention for your controls, you should be.  By default, Access gives bound controls the same name as the field that is their control source, but this can be confusing, so it is highly recommended that you use a naming convention so that when you are programming you can differentiate between controls and fields.

The value #12/30/1899# implies that the default value has not been set, or has been set to 0

You indicate: "But then when a new record is entered using the form, which has not been closed, I do not get the value of the previous record in the field"

When you refer to the "previous record", was the date field in that record actually changed?  If not, then the AfterUpdate event would not have fired.  If you are just scrolling through records without updating them, then the default value is not getting reset.

You could use the Form_Current event to check to see whether the current record is a new record, and if not, use the current event to set the default value of those controls.  Something like:

Private Sub Form_Current

    If me.newrecord = false then
        me.control1.Defaultvalue = me.control1
        me.control2.defaultvalue = me.control2
    end if

end sub
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Expert Comment

by:mbizup
ID: 37747046
You can accomplish the same thing by using the Current Event of the form:

If Me.NewRecord = True then Me.FieldName = DLookup("FieldName","TableName", "IDField =" & DMax("IDField","TableName") )

This is adequate unless the database has multiple users who would be adding records simultaneously.
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Accepted Solution

by:
als315 earned 2000 total points
ID: 37747076
Try:
Me.fieldname.DefaultValue = "=Datevalue('" & Format(Me.fieldname, "mm/dd/yyyy") & "')"
Correct format according to your regional settings
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LVL 61

Expert Comment

by:mbizup
ID: 37747082
Another possible solution is to place the name of a User Defined Function in the Default Value property (right on the property sheet).  For example, put this in the Default Value property for your control:

GetLastRecordedDate()

And then place this function in a code module:
Public Function GetLastRecordedDate
       GetLastRecordedDate= = DLookup("FieldName","TableName", "IDField =" & DMax("IDField","TableName") )

End Function

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