ComboBox field is null (how to check?)
so I've got this:
If Me.cobProbNo = "" Then
MsgBox "no problem exist"
Somehow, it does NOT get into the MsgBox statement. How do I 'capture' the fact that combobox may be null?
Thank you for taking the time to report an issue.
What's wrong... Please write below.
Now I found code on getting this to work and it works great except for one minor flaw that I am trying to add to it. If the user goes to clear the combobox thus making the value null the Msgbox appears asking for the users password but fails each time because the null username does not exist.
I'm trying to make theproper if statement to check and see if the username selected from the combobox does not exist in the usertable then it just cancels the update statement.
(between I did not make this code I borrowed it from another forum)
I've got an unbound combobox with a default value, but I still would like users to enter a Null value. I've got the Null value in the list of drop down items, but when it is selected, the combox value does not go to null, but instead goes to the default value.
Any easy way to allow null values to be selected? I know it was possible with older versions of Access, but not any more.
I need to convert that field to a date/time one. Which is being hindered by these values of NULL.
The problem is that when I put the word NULL in the field criteria spot, Access believes that I am referring to a value of 'null' and will not do the update.
I have done "NULL", NULL, =NULL, ="NULL", is NULL. and no success.
Please remember that the actual value is not 'null'. It is a text field that has the word NULL in the field.
'Invalid use of Null'.
if I use another table for a string value for the same recordset, the code works and the combobox gets populated with the unique names of the field selected.
I tried to retrieve the values for different fields from the table tblPlants, but I get the same error.
It appears that I cannot populate the combobox with any of the field values from the tblPlants. But the values are not Null - by using the code line for the MsgBox (msg), I am able to see the values in the MsgBox.
Or is it some other criteria I am missing?
Why is it that in the query builder when I enter the following into the criteria box it doesn't deal with the null in the combo
iif( isnull(forms!formname!combobox), is not null ,forms!formname!combobox)
shouldnt this return any feilds that are not null
As of now, I have tried to implement this and as I select any value from the first combobox of row 1 I see the second combobox of the same row gets populated but as I go on selecting values from the first set of comboboxes I see that the values in the second set of the comboboxes above changing or becoming null.
The 1st combobox is cboRCMTask:
Details: On the form on which I record these transaction I have two combo-boxes: 1)Account Debited and 2)Account Credited.
Both combo-boxes have the same source, which is an Active-Account-Query.
I have the following code to avoid Account Credited and Account Debited to be the same:
This code works fine, but the problem I have is, that when the focus returns to the combobox ctlCreditAccountNumber, the account number I've entered just before (and which is wrong) is still there.
I would like the combobox to be clear of any text, after the message box disappears.
I have tried putting the rowsource to "", I have tried = Null, and Undo but nothing works. From what I gather, the reason for that is that the combobox is a bound field. That is something I can't change though.