Modules & VBA :: Inactive Use Of Null In Search Form
Mar 18, 2014
I'm trying to add a new functionality on my search form where the user can search for records that haven't been modified(based on the field DateModified) for certain amount of time.This is what I added in my search function but it's giving me "Invalid use of Null"
If Not IsNull(Me.txtInactiveTime) Then
Dim LValue As Integer
LValue = DateDiff("d", Me.DateModified, Date)
Select Case Me.txtInactiveTime
Case "> 1 month"
strWhere = strWhere & "(LValue >= " 30 ") AND "
Case "> 2 months"
strWhere = strWhere & "(LValue >= " 60 ") AND "
End Select
End If
txtInactiveTime is a combo box where the user chooses the time during which the records haven't been modified.(i.e. 1 month, 2 months etc.)
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May 14, 2013
I'm creating an advanced search form which is making use of Like queries and is Null. A working example is below:
Like "*" & [Forms]![Frm_Data_Mine]![Combo_Primary_SIC] & "*" Or Is Null
So this either returns matching values from the field, or basically ignores this if left blank. All good.
I have two other fields:
[Turnover_From]
[Turnover_To]
Both are numeric values. What I would like to achieve is the same as the above, so I can search between a from and to value, or if left null, ignore them. I had a go with the below but it's clearly not right, and I can work how where and how I insert the Like statement which makes the others work.
Between [forms]![Frm_Data_Mine]![Turnover_From] And [forms]![Frm_Data_Mine]![Turnover_From] Or Is Null
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Sep 21, 2012
I have a form and when it's opened you get 3 different search questions to answer or leave blank. My question is.... If a search parameter is entered but no results are found to match it, how do I create an error message telling the requestor "No Data Found"?
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Aug 18, 2015
Field "A" is the drop list to select data like (Yes, No)
Field "B" is inactive but turn it to active when the field "A" is select to "Yes".
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Aug 17, 2014
I have just noticed when I open one of my forms . the database window becomes inactive and I cannot open another , form , report etc.
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Jan 15, 2014
I have several tables linking our employees to certain supervisors, etc.On the Form, there is a drop down with all employees listed that someone can select and then enter the stats required. When someone leaves the firm, I want to remove them from the form dropdown list, but not delete them from the corresponding table. I have seen this in other databases where they someone added an 'Inactive' column with a Yes/No response and when you selected the inactive - yes, that name would disappear from the form when people select names from a dropdown to enter stats.how to make the names disappear from the view in a form, but not in the table related to that form?
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Nov 16, 2014
I 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
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Jul 5, 2013
It 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] ....
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Mar 25, 2015
I want to pass the Combobox value of one form to a textbox on another using the where condition. Using the break in VBA, the value of the combobox (in this instance "two") shows as null. the control of the combobox is [cboSubCategory] and I want it's value to pass to another form "tblCategoriesSub" (aware of the incorrect reference, as used wizard quickly - but will change if I can get it to work) to the "SubCategory" field.
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Apr 10, 2015
I have a form with couple of textboxes bound to a table. When the user opens the form to enter records, i want to write a function that would go through the textboxes to check whether the textboxes are left NULL. Now i can write code on button click for each form, but i was wondering if its possible to write a function that could be called for each form that i have to check for null values.
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May 11, 2015
Nutshell: My user DB has one menu with 4 tabs (2 for adding records, and 2 for searching/editing records). Since the form opens up in the acFormAdd mode, Access already creates a new record (blank) before they type anything. It is resulting in blank false new records that are getting added to the table and they are getting annoying. My audit table is full of "user X created new record at this time" when it's just a blank record.
There must be a way to prevent this using VBA, but I cannot find it.
I've seen ways to disable "add new record" buttons and such, but nothing that disables Access from being smarter than me and creating a new record before I decide to.
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Aug 4, 2015
The unbound Parent form has a listbox (SQL Server) , the selection updates the SubForm with a primary key ID. The Subform is a ReadOnly view from an Oracle Linked table. It populates with a Select * From Oracleview where ID = listboxID The code is at the link shown below update: The subform uses textboxes linked to the read-only record.
The main form can populate, no problem. However the SubForm data source is either populated OR is Null.
If it is Null, the subform stays blank. Two Objectives:
1. Set a boolean variable flag in the parent (main form) that subform record exist or that it is null. e.g. Parent obtain recordset count property from Sub form
2. Display the subform with blanks.
[URL]
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Nov 18, 2013
I am struggling trying to execute a function inside a Form_current event to display some stats.
The Function is this:
Code:
Function FlightsByAircraft(Aircraft As Long) As Long
Dim rst As DAO.Recordset
Dim dbs As DAO.Database
Dim str As String
str = "SELECT * FROM tblFlights WHERE AircraftID = " & Aircraft
[Code] ....
The code for the Form_Current event is this:
Private Sub Form_Current()
txtStats1 = FlightsByAircraft(Me.AircraftID)
Very simple. Well, the problem is when I move to a new record, a error message comes up: "Run-time error '94' - Invalid use of Null". It is because the AircraftID is not populated at that time. I tried to insert in the function code something like that:
Code:
If IsNull(Aircraft) then
exit function
else
.... (the DAO.Recordset code)
but it doesn't work.
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Mar 21, 2014
I am using the following code to filter my form with a search box:
Code:
Me.RecordSource = "qryCompanies"
Me.Filter = "CompanyName Like '*" & Me.SearchTxt & "*' Or webpage Like '*" & Me.SearchTxt & "*' Or PriorName Like '*" & Me.SearchTxt & "*'"
Me.FilterOn = True
[Code] ....
It works great with one minor issue: if I try to search for a name containing an apostrophe, I get a syntax error. So, it won't find Children's Hospital for example.
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Jun 3, 2014
The database is a patient database used for tracking Inpatient data and Handover (or Handoffs for those in the US). It has been merrily ticking over since December and has accrued several thousand records. To get access to this data in new and interesting ways Im trying evolve my rudimentary search function which currently only works for diagnosis, name and consultant (in otherword text fields).
Thus I have an unbound form that has various input boxes on it. I have borrowed some code to power the form and have replaced with own fields:
Code:
Dim criteria As String
Looks for input text and adds it to the final criteria to power the search list at the end based on field in this case txtDiagnosis
If Not IsNull(Me.txtDiagnosis) Then
If criteria <> "" Then criteria criteria & " and "
criteria = criteria & "txtDiagnosis like " & Chr(34) & "*" & Me.txtDiagnosis & "*" & Chr(34)
End If
[code]...
ISSUE 1:
I am struggling with the date search function. It doesn't work. Whether it is prudent to search for either a admitted date or a discharged date?
ISSUE 2:
I have a check box for "complications" that I'd like to be included on in the search.
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Sep 10, 2014
I have searched for bits of code to copy other people better than I, and had some success but I am failing to complete, so it is now time for me to visit you all. I am trying to open a PDF from a button on a subform. The location of the PDF is specified in a field. I want to open the PDF and search for a Member ID criteria also listed in a field on the Form.This is my code:
Code:
Private Sub Text12_Click()
Dim strPath As String
Dim Searchmem As String
strPath = [Notetxt]
Searchmem = [MemID]
[code]....
Adobe Reader reports "There was an error opening this document. The file cannot be found." but then opens the file (that's something).So it's the "search" bit that is the problem, and I cannot for the life of me get my search parameter to be used.
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Nov 27, 2014
I have a table called 'Klanten' which contains the rows 'password' and 'login' (and several rows not needed for this form)
So I'm trying to make a login form which first checks if something is entered (this part of the code seems to work).
Private Sub Knop13_Click()
'Check to see if data is entered into Username
If IsNull(Me.Username) Or Me.Username = "" Then
MsgBox "gelieve een login in te voeren.", vbOKOnly, "Required Data"
Me.Username.SetFocus
[Code] ....
But from then on i seem to have some issues.. The part of the code underneath seems to only work for the first 'login' and 'paswoord' in my table called "Klanten".
-Username is the name for the field where they enter their 'login'.
-Password is the name for the field where they enter their 'paswoord'
If Username.Value <> DLookup("[login]", "Klanten", "[Username]='" & Username & "'") Then
MsgBox "Invalid Username. Please try again.", vbOKOnly, "Invalid Entry!"
Exit Sub
End If
If Password.Value <> DLookup("[wachtwoord]", "Klanten", "[Password]='" & Password & "'") Then
MsgBox "Invalid Password. Please try again.", vbOKOnly, "Invalid Entry!"
Exit Sub
End If
Then as last part i would like to goto another form called 'Mainmenu' if both the Login and the Paswoord is correctly entered in the fields Username and Password. Here i have the most issues as this doesn't seem to do anything at the moment
If Password.Value = DLookup("[wachtwoord]", "Klanten", "[Username]='" & Username & "'") And Username.Value <> DLookup("[login]", "Klanten", "[Password]='" & Password & "'") Then DoCmd.OpenForm "Mainmenu"
End Sub
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Dec 2, 2013
I have a form that I allow my users to view but not to change any of the records.
As the number of records has grown it's become necessary to add a search function.
My problem is that because the form is locked it cannot be searched.
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Oct 24, 2013
In my database I've encountered a hitch - I've got one form set up to view one person at a time and I've got many records in this database - Is it possible to create a textbox and a button called search that will take me to the record containing this text?
i.e currently im on record abc i type into the text dfe and press search - it will take me to a record that contains that text?
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Jul 28, 2014
What i want is to have a combo box on a continuous form that as you type it filters the Query it is based on using a Like *. and drops downs so the user can see the updated list after each key press? Is this possible?
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Jul 4, 2014
I did export the table data into a tabbed delimited format and will include that at the end. If you want to reproduce my bug copy that data in a txt file and import that into the table tblMain. Make a search form and a sub form. the sub form is linked to the table and the main form is unbound with two search buttons.
Problem Statement:The code works fine. I did find a bug that seems to arise with the wild cards when the entire field values are entered. You can replicate the bug by testing the search criteria listed below.
This is a brief example of the bug. A detailed description is near the code below.
If my name is "Devtycoon" and I search "Dev" the SQL statement will build "*Dev*" and it will pull up my name, "Devtycoon". On the contrary if I search "Tycoon" the SQL statement will build "*tycoon*" and it will pull up my name, "Devtycoon". If i search "DevTycoon" the sql statement will build "*Devtycoon*" and no results will be returned. That is buggy because the name is in the database but no wildcards would be needed.
Table structure:
tblMain
ClientID
Surname [text]
Organization [text]
ProgramTitle [text]
City [text]
State[text]
Zip4 [text]
Telephone [text]
Form1 contains the controls for search criteria. Three text box controls are used to filter a sub form control called "DS". The sub form is called sFrmMain and is a datasheet that shows results of the search. there is a button that runs the code and another button that clears search criteria and shows all records. Both button's code set the sub form's record source using an SQL string built using a function that returns a segment of the overall search string using the contents of each control that then is concatenated into a SQL statement used to set the record source.
There is a function for the following components of the SQL statement
SELECT / FROM
WHERE
controlA = me.txtSurname
controlB = me.txtOrganization
controlC = me.txtProgramTitle
This is how you can replicate the bug.
I tested two additional surnames organizations and program titles as follows:
Try example (1). you will get both the 4's and the 14's records returned.
If you type in letter for letter of the second record (the one with the 14's) no records populate. It is like the wild card does not like it if you type in the entire field value. Uncle Gizmo's and Allen Brown's method do the same thing were no records populate if the 14's entire surname organization and program title are entered into the text controls. Can you reproduce this error? Other than that I think either method is bulletproof.
Example criteria
1) put the following criteria in each control then hit the search button
4 surname
4 organization
4 program title
[two records returned]
2) put the following criteria in each control then hit the search button
[no records returned]
14 surname 14
14 organization 14
14 program title 14
Code behind search form:
Code:
Option Compare Database
Option Explicit
Private Sub cmdShowallRecords_Click()
Dim strSQL0 As String
Me.txtOrganization = ""
Me.txtProgramTitle = ""
Me.txtSurName = ""
strSQL0 = fSQL_SelectFrom & fWhere & fSurName & fOrganization & fProgramTitle
Me.DS.Form.RecordSource = Left(strSQL0, Len(strSQL0) - 5) & ")"
[code]....
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Sep 30, 2006
I am a newbie to Access. I have a check box on my form that defaults to checked, meaning the record is active, what I want to do is when the box is unchecked, not have the record appear as an active record and just be on the table. I have the check box on the table and when I uncheck it on the form it unchecks on the table but don't know how to stop it from appearing in the active records. Thanks for your help, April
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Jan 9, 2015
I have created a database containing customer records and i wanted to somehow add a part where an individuals records will automatically be deleted if they are not active for 3 years+
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Nov 14, 2013
I'm creating a search form to filter out data based on certain inputs. My VBA code looks like:
Code:
Private Sub Command18_Click()
On Error GoTo errorcatch
Me.Filter = "([Experiments.Log] Like ""*" & Me.Text21 & "*"") AND ([Expdate] Like ""*" & Me.Text22 & "*"") AND ([BaseSolution] Like ""*" & Me.Text24 & "*"") AND([AddCom] Like ""*" & Me.Text25 & "*"") AND ([Test] Like ""*" & Me.Text26 & "*"") AND ([Plan] Like ""*" & Me.Text23 & "*"")"
Me.FilterOn = True
Exit Sub
errorcatch:
MsgBox "Error #: " & Err.Number & vbCrLf & vbCrLf & Err.Description
End Sub
However, the output does not include records where other fields are blank. I have read that I may need to use Is Null but am not sure how to.
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Jun 5, 2014
Input box Search problem. I have been using the following to find a record in my frmMain using an Input Box:
Private Sub cmdClientIdSearch_Click()
'Searches for Client by ID number
Dim rs As Object
Dim strCriteria As String
strCriteria = InputBox("Please enter Client ID" & vbCr & "Do not type leading zeros")
[Code] ....
It works great if I run it from a command button from frmMain. But, if frmMain is open and I run it from a command button on my switchboard, I get the following error message:
Run Time error 7951. You entered an expression that has an invalid reference to the Recordset Clone Property. I tried inserting a command to open frmMain in the first line, even before the two Dim statements, but I get the same result.
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Jun 24, 2015
I have a form that has a subform on it. The main form shows a category of furniture and has custom navigation buttons and a search text box for asset numbers and command button that runs the search. The subform shows the asset numbers associated with that furniture category, sometimes there is only one asset number, in other cases there could be 60. There is a scroll bar to scroll through the asset numbers when there are too many to see in the initial window.
The buttons all work as they should except when I search for an asset number that is part of a category that has too many asset numbers to show in the main window. When this happens the "previous" and "next" navigation buttons do not take you to the previous or next record. All of the other buttons on the form work though - you can go to the first, or the last record, and you can search for a new asset.This is the code for the search:
Code:
Private Sub cmdAssetSearch_Click()
Dim rs As Object
If IsNull(Me.TextAsset) Or Me.TextAsset = "" Then
MsgBox "Please type in an asset number to search for.", vbOKOnly
Me.TextAsset.SetFocus
[code]....
I've also attached a picture of what I mean when I say there are more asset numbers than what the window shows.
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