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ComboBox field is null (how to check?)

ComboBox field is null (how to check?)
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I've a comboBox call Me.cobProbNo, At the cobProbNo On_Change() event I want to exit sub when the combo box is empty.

so I've got this:

If Me.cobProbNo = "" Then
MsgBox "no problem exist"
Exit Sub
End If

Somehow, it does NOT get into the MsgBox statement. How do I 'capture' the fact that combobox may be null?
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ComboBox checking to see if value exists

ComboBox checking to see if value exists Icon
So I have created this combobox that requires the user to enter a password when selecting a value in my unbound combobox. If the password is incorrect then the combobox is cleared and is reset to the value it was before the update was attemped.

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)
 

How to filter form when value selected from combobox is null?

How to filter form when value selected from combobox is null? Icon
I have a combobox which has null as a valid value.I want the form to get filtered when user selects null as a value also.However no filtering happens when the value is null.I would liketo know is whether it is possible to filter if the record selected is null as the filter criteria will be empty string then?I am not posting any code as my question is just that can criteriabe null and still filter?
 

Cannot get values for a Combobox..

Cannot get values for a Combobox.. Icon
I am trying to retrieve the unique names from a table into the combobox on a form. I have the attached code for the command button on the form.

'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?
 

cascade combobox problem.

cascade combobox problem. Icon
I have two comboboxes on a subform. The first combobox is used to populate the second combobox. These are placed in the detail section of the form.I want them to work this way:when I select any value from the first combobox,I want the second combobox of the same row to get populated by relevant value.

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:
 

Check if field is Null

Check if field is Null Icon
I have a form called AddNewCustomer which has a field called Customer_Name, now I have a button that opens another button called Command1. The thing is, when I click on that button, I need it to check if Customer_Name is empty and if it is to give an Error, and if it is not null then check if the name exists in the main table tblCustomerInformation and if it does then giveserror and once a person clicks OK on the error it empties the field and if doesn't exist then open another form.
 

Set value of bound combobox to NULL

Set value of bound combobox to NULL Icon
Goal of my Database: Recording bank transaction (money transfers from one account to another)

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:
[CODE]

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.
 

Date Field Check against Saved Date?

Date Field Check against Saved Date? Icon
I have a combobox that checks for saved dates and allows someone to choose from the drop-down if they want to go back and change values in the fields from that date. I have a date field with a date picker to choose a date that has yet to be saved.

My issue is that if a person uses the date picker and chooses an existing date (instead of the combobox), I get an error for the combobox code once they try to save.

I was thinking that a simple VBA code in the Lost Focus event of the date picker could fix this. It would say something to the effect of:

If Date Chosen = Existing Date Then
MsgBox("Use combobox for existing dates")

datepickerField.SetFocus
datepickerField.Clear
End If

Essentially, the user would be unable to choose an existing date from the date picker, and would have to use the combobox instead.

I don't know how to write out the first part "Date Chosen = Existing Date". All I could think of was "DTPicker0.Value =" or "Me.DTPicker0.Value = ", but wasn't sure how to check it against existing dates.
 

Missing Mandatory Data

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We need to find out the items which don’t have any values for the below fields. The field might be null. 1. Brand Name I.e. GDS Brand field 2. Functional Name I.e. Functional Name field 3. Variant Name I.e.

GDS Variant field. 4. No pack size, this is bit tricky, to find out the items which don’t have pack size we need to check the material description I.e. Description field in our sample file.

For e.g. if any item does not not have any number in the description You can pick out that particular item. I have tried with your query but I did't get any result. thequery is SELECT GDSBarnd, GDSSubBrand, GDSVariant, Description FROM Sheet1
WHERE Sheet1.GDSBarnd Is Null
OR Sheet1.GDSSubBrand Is Null
OR Sheet1.GDSVariant Is Null
OR Sheet1.Description Is Null | when I run this query all null values will be present.
 

Form ComboBox Filter - Select ALL records

Form ComboBox Filter - Select ALL records Icon
I'm trying to filter records on a form with a ComboBox, and I want the option to return ALL records.
My Form is: frmReview
My ComboBox is: cmbGLimpact
The RowSource is: SELECT DISTINCT [GLimpact] FROM Initiatives UNION SELECT Null As AllChoice FROM Initiatives ORDER BY [GLimpact] DESC;
The Query Criteria is: [Forms]![frmReview]![GLimpact]
The field values are: Yes, No & TBD

The filter works fine for Yes, No & TBD, but the blank choice doesn't return all records.

I need to be able to setup several filter ComboBoxes to enable filtering on several different fields. So, depending on which ComboBox filter (field) the user wants to filter on, the otherswill allow all records to be returned.
 

Simple check if fields are Null not Working

Simple check if fields are Null not Working Icon
I am trying to check if 3 text fields on a form a empty and then setting the date "Analyst to Null if it is and it wont work.
...
am I missing something obvious