Null ListBox Check
Oct 11, 2004How (in VB) do you "check" to see if the user has selected an item from a listbox? I've searched the forums and tried everything I know and I keep getting: "Invalid Use of Null"
Any Ideas?
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'Null' Check Not Working!!
Oct 23, 2006Hello,
I am putting a check whether the inputted value in a text box(txt_id) is filled or not. If it is 'null' then it should not execute the insert statement but somehow the check for the null value is not working. Can someone tell me why??
Private Sub cmd_inserer_Click()
If txt_id.Value = Null Or txt_id.Value = "" Or txt_id.Enabled = False Then
info = MsgBox("Veuillez remplir champ « Id »", vbInformation)
ElseIf txt_id.BackColor = &HFF& Or txt_libelle.BackColor = &HFF& Or txt_description.BackColor = &HFF& Then
info = MsgBox("Veuillez remplir tous les champs fausses!", vbInformation)
Else
MsgBox txt_id.Value
Set db = CurrentDb
strSQL = "INSERT INTO objectif ( id , libelle,description) values ('" & txt_id.Value & "' , '" & txt_libelle.Value & "','" & txt_description.Value & "') ;"
db.Execute strSQL
db.Close
Form_objectif.Requery
txt_id.Value = ""
txt_libelle.Value = ""
txt_description.Value = ""
cmd_ajouter.Enabled = True
cmd_modifier.Enabled = False
End If
End Sub
Forms :: Summing ListBox Column When There Is A Null Value
Mar 13, 2013This is the function i'm using for summing a listbox column:
Function TonSum() As Variant
Dim I As Integer, J As Integer, ctl As Control
Set ctl = Me.lstDrivera2
J = ctl.ListCount - 1
[code]...
The problem i have is if one the records in the listbox doesn't have a value (is null) then Access gives me a 'Type Mismatch' error. How to treat the null value so it excludes it from the sum?
Add Field To Table Then Check For Null
Feb 10, 2008I need to add a Yes/No field to a table. I know I can do this in design view. Next I want to loop through the table and set it to Yes if certain fields are null. What I need help with is the VBA looping part and setting the boolean field to Yes if the fields being checked are null.
View 3 Replies View RelatedQueries :: How Filter Date Is Null Using Check Box
Jan 13, 2014I have form that user can filter the records and generate a report but I have difficult trying filter null date.
If I have check box called filter null if it has a tick in I would like it only show records that have no value (is null) in field "date start" but if unticked I would like it to only show records with a date in field "date start" ...
Reports :: Show If One Of Fields Are Null Or Not Check
May 1, 2013how to run a report to show a Client if one or of the following fields are blank or unchecked(Yes/NO?
Fields
Client
Assessment Date(Null)
Placement Fee Paid(Check Box)(No)
TJ Completed(Check Box)(No)
So basically, if one of the above fields are null or unchecked, please show in the report. I'm sure it's easy but to do, but not up on coding.
Access VBA Statement To Check For Null Entries
Jan 24, 2012I've built a form on my Access database that invites a user to enter a start date and an end date into two textboxes. When i press a command button, a parameter query runs which uses the two textboxes as the parameter's criteria. However, to ensure that both textboxes have a data entry, i have tried entering in some VBA that prompts the user to enter in a date if its left null...then set focus to that textbox: Here it is...
If IsNull(Me.txtWeight1) Then MsgBox "You must enter a minimum weight!"
Me.txtWeight1.SetFocus
Else
If IsNull(Me.txtWeight2) Then MsgBox "You must enter a maximum weight!"
Me.txtWeight2.SetFocus
Else
If IsNull(Me.txtWeight1) And IsNull(Me.txtWeight2) Then MsgBox "You must enter a min and max weight!"
End If
This will not compile for me! I've tried with and End If and without an End If and other stuff. Why won't it work?
Modules & VBA :: Check That No Records Are Selected In A Listbox
Apr 28, 2014I have button on my form that uses a selected record in a listbox (non multi-select) to run code that updates a table. The code itself works great so long as there is a record selected in the listbox. If no record is selected an error is thrown. I'd prefer the end user not to ever see that error. If the end user clicks the button and no records are selected, I'd like for nothing to happen at all. I've tried several variations of checking the listbox with an if / then statement to see if records are selected and if so to exit sub, but they all throw errors when no record is selected in the listbox.
Code:
If IsNull(Me!lstHeatTreatments) Then
Exit Sub
End If
[Code].....
Forms :: Null Field Values In Multi-select Listbox
Jun 15, 2014I have a multi-select listbox (called PotentialItems) which behaves perfectly unless one of the fields has a null value in it, in which case I get an error 13, "Type mismatch" in the following code. It is valid business-wise for column 9 to be null.
Code:
Dim varItem As Variant
Dim dblTargetPrice As Double
With Me.PotentialItems
For Each varItem In .ItemsSelected
If Not IsNull(varItem) Then
dblTargetPrice = Nz(.Column(9, varItem), 0) '<----- Error here
End If
Next
End With
Forms :: Nested IF Statement To Check If Input Box Is Null On Form
May 9, 2014I have a form in my Access database that has 3 input boxes by which a user can locate a record by. The problem I am running into is that I can not get a nested IF statement to work properly to first check which of the search boxes are filled in and second search by whichever is filled in. I have come up with the following code that seems to be only searching by the first input box. If the first input box is blank it does not move to the second or third numbers so I imagine there may be something wrong with the order of my IF statement or the syntax is off.
View 14 Replies View RelatedDLookup - Check If ID Matches Textbox It Works / However If Form Is Null It Doesn't Work
Mar 26, 2015basically am creating a booking system, i have a add a room form. my form should check whether i already have a room number in my table, which works when the form is filled in. however when my form is null, then i press add new room button, i get this error rather than " please fill your form in"
Error: runtime error '3075' syntax error (missing operator) in query expression 'Room Number ='.
room number is a number field, integer but has primary key. i cant keep autonumber, as my requirement is to add new room number, but the roomnumber has to be unique.
here is the dlookup;
If DLookup("RoomNumber", "tblRooms", "RoomNumber = " & Forms!RoomPackages!txtRoomNumber) > 0 Then
MsgBox "This number already exists."
Else
p.s it unbound form
Modules & VBA :: Switch Function - A Null Makes Whole Column Null
Nov 16, 2014I do not understand what is happening here. I have foll0wing line in a calculated query field:
m: Switch([EmpID]<5,1) ' run Query 18 in attached example, A2007/2010
this produces 1 for all EmpID<5 and Null for all other EmpID's. All as expected.
But if I do this:
m: Switch([EmpID]<5,1,[EmpID]>=5,Null) ' run Query 19 in attached example
then the entire column is set to Null
Modules & VBA :: Invalid Use Of Null With No (obvious) Null Values
Jul 5, 2013It might be an easy one but I just wasted the past hour deciphering through my code in order to solve the run-time error '94' that I'm getting when trying to execute the following code:
Code:
Private Sub cmdUpdateDates_Click()
'###################################
'This sub aims at combining the timesheet date and the start and end time into the fields [Start Time] and [End Time].
'###################################
Dim intCounter As Integer
intCounter = 0
Dim rs As ADODB.Recordset
[Code] ....
Copying Data Within Same Form From A Listbox Containing A Query To A Blank Listbox?
Apr 21, 2006Hi, I'm new here, so I hope I'm posting this in the correct place. I've searched the forum to see if there are any existing threads that might help me, but I've not found anything that does...
(I think this thread ( http://www.access-programmers.co.uk/forums/showthread.php?t=93444&highlight=Copying+data )may be trying to achieve something similar to me, but I'm a beginner and don't really understand it)
I shall stop waffling! I'm not entirely sure that what I'm trying to achieve is possible, I expect it probably is!
Right, I have a form (frmGroupRegister, which contains exactly the same fields as the table it comes from, tblGroupRegister), which consists of three things:
-GroupDate - The date a group took place on. It is my primary key, as no more than one group occurs on a specific date.
-ParentList (A listbox which contains a query showing the ID number, forename and surname of everyone in a table, tblParentDetails)
-ParentsAttending (A blank listbox)
I would like to place buttons in between the ParentList and ParentsAttending, which would allow users to conduct a 'register' of attendance by copying individual/multiple details from ParentList into ParentsAttending (much like you get when choosing which fields to include in a form when using a wizard for example). I would also like them to be able to remove people from ParentsAttending by using a button in case of accidentally adding the wrong person into the ParentsAttending box.
I'm aware that another, probably simpler way of achieving this would be to use a tick-box system, but I feel that visually, the first method would both look better and demonstrate who is present more clearly.
Any help would be much appreciated, but my Access skills are quite basic and things will probably need to be spelled out for me.
I'm using Access 2000 and Windows XP.
Thanks for your help,
Alice :)
Forms :: Dynamic Row Source For Listbox From Multi-select Listbox
Jun 10, 2015I am using the selections made of the form to generate a query for the user.
I have a CITIES listbox that is populated with values from a stored query.
I would like to make it multi-select and populate a LOCATIONS list box and a NAMES list box based upon the CITIES that are selected.
I have the locations currently populated from a stored query that reads the City selection from the Form. It looks like this
Code:
SELECT DISTINCT (t_location.LOCATION) AS Expr1
FROM t_location INNER JOIN t_asset_master ON t_location.LOCATION_PHY_ID = t_asset_master.LOCATION
WHERE (((t_location.CITY)=[Forms]![MasterQueryGenerator]![CityList]));
I also want multi-select so that is you can un-select all and get the results for all cities.
Here is my half thought approach.
Code:
Private Sub CityList_AfterUpdate()
'Dim LocQryStr As String
'Dim r As Integer
'Dim ctl9 As Control
'LocQryStr = "SELECT DISTINCT (t_location.LOCATION) " & _
[Code] ...
I intended to have the variable LocQryStr as the row source but I abandoned the idea of having multi-select when I saw that .Selected(I) never returned true. Its like the values aren't read in this subroutine.
Forms :: Listbox To Show Types Based On Section In Other Listbox
Sep 9, 2013I have a list box called "product list box" based on a query called "searchqry", i also have another listbox called "type list box" , how do i get the type list box to only show "types" based on the section in products list box?
View 1 Replies View RelatedForms :: Passing Listbox Rowsource To Another Form Listbox
Dec 14, 2014Using a popup form
1. On my main form, I have a listbox, I would like to edit the values of the listbox.
To do this, I have a popup form with 2 listboxes, one to have the values of the listbox on the main form, and the other listbox with option values for the 1st
1) how to i pass the rowsource sql of the listbox on the main form to the listbox on the popup form
2) how on closing the popup form, do i update the rowsource sql listbox on the main form from the changed value of the popup form listbox rowsource sql
Forms :: Make Listbox Visible After Selection Of Another Listbox
Oct 23, 2013Okay then, after much trouble and confusion, I finally realized I need to use an Extended listbox in order to allow for multiple items to be selected from a list on my form (rather than the evil multiple selection combobox!).
However, now I am trying to figure out how to make one listbox (IndustryClassification) only be visible if the item "Industry" is selected in another listbox (TypeOfBusiness). Coding I can use for this in the AfterUpdate event of the listbox?
Query With Is Null Returning Not Null Records
Apr 18, 2006Hello all,
A bit of a weird one, I've got a query and the criteria for showing records is that one particular field is null. However the query is showing records with the values in the field chosen for the Is Null.
Not sure why this is happening, has anyone come across this problem before?
Thanks.
Forms :: Make Image Appear In Form When There Is Check In Check Box From Table?
Jun 26, 2014how can i make a image appear in my form when there is a check in the check box from the table?
View 14 Replies View RelatedCombo Criteria If Not Null Or Is Null
Apr 3, 2008I am having problems with setting up a set of combo boxes.
What I am trying to do is if combo Productline is empty then in combo PartNumber would show all products but if combo Productline has a value selected then in the combo partnumber would only be able to select the partnumbers in that productline.
Invalid Use Of Null ? How To Assign Null
Nov 16, 2006Hi, I have some problem with assigmnet with date and string variable. what i wana do is get data from Forms textboxes into variable and then by insert query send to history table.
the problem occurs when there is blank textbox its says invalid use of null.
e.g
myStringVariable = Forms!myform!EmpName
myDateVariable = Forms!myform!EmpDOB
this code is behind the update button which i press when ever i want to shift data to History table
so when the fields are empty the invalid use of null error arrise
any idea how to handle this null specially in date
Select All Listbox AND Update Listbox
Jun 17, 2005Hello,
I've got this multiple select listbox which writes data into a textbox:
Private Sub List2_AfterUpdate()
Dim Cursisten As String
Dim ctl As Control
Dim Itm As Variant
Set ctl = Me.List2
For Each Itm In ctl.ItemsSelected
If Len(Cursisten) = 0 Then
Cursisten = ctl.ItemData(Itm)
Else
Cursisten = Cursisten & "," & ctl.ItemData(Itm)
End If
Next Itm
Me.txtCursisten = Cursisten
End Sub
And I've got a SELECT ALL button to select all records in the listbox:
Private Sub cmdSelectAll_Click()
On Error GoTo Err_cmdSelectAll_Click
Dim i As Integer
If cmdSelectAll.Caption = "Alles Selecteren" Then
For i = 0 To Me.List2.ListCount
Me.List2.Selected(i) = True
Next i
cmdSelectAll.Caption = "Alles De-Selecteren"
Else
For i = 0 To Me.List2.ListCount
Me.List2.Selected(i) = False
Next i
cmdSelectAll.Caption = "Alles Selecteren"
End If
Exit_cmdSelectAll_Click:
Exit Sub
Err_cmdSelectAll_Click:
MsgBox Err.Description
Resume Exit_cmdSelectAll_Click
End Sub
The only thing is that when I use the SELECT ALL button, the function List2_Afterupdate doesn't work anymore. There must be a simple solution but I just can't figure it out. Can anyone please help me?
Tnx a lot!
Move Items From Listbox To Other Listbox
Jul 16, 2006Hello everybody,
Hopefully somebody can help me on this one. I searched the whole internet and access forums, but I didn't find the exact solution for my problem.
I've got a table with students, a table attendance, where I now only save the students who are absent, but I would like to save also the students who are PRESENT (at the same time).
I've got a combobox where I filter the Class, which then updates a listbox with the students from that class. What I do now is select the students from the listbox and then press a save button and it saves the records to the table absence with STATUS: ABSENT.
I would like to save the NON selected students also in that table, but with PRESENT in the column STATUS.
I thought of making another listbox next to it, where after selecting the absent students, they wil apear and disappear in the PRESENT table so I can store all the information.
But the only problem is that I can find this solution when the listbox is populated by a list of values instead by a table or query. And the other solution is to store the temporary data into 2 different tables, but that's not working for me because it's a multi user database and everything will be messed up.
Hope that someone can help me, I will be very happy.
Forms :: Hide Unchecked Values In A Listbox - Create Hyperlink On Listbox Values?
Jan 20, 2014Firstly, is it possible to hide unchecked values in a listbox? I have a user with several roles and I want to only show the ticked roles in the listbox.
Secondly, can you create a hyperlink on listbox values? i.e, if I click on "Manager" in the roles listbox, it follows that to another form and opens the record about managers?
Field Criteria: Is Null; There Are Null Values In That Field; No Records Are Returned
Nov 16, 2007I think the title pretty much sums it up....
I have a query where data is first sorted by user input; first field's criteria: [fieldname], then by another field's criteria: Is Null.
I know there are records containing null values in the second field, as I have run a select query with the criteria: Like "*", to make sure they are null, and not zero-length-strings.
The query is refusing to return any results...
Any ideas?