I have a textbox and a button on my Access form. In the click event of the button i want to see if the textbox is empty, if it is, nothing will be executed.
So i use
If Me.textbox.Value = Null Then
Exit Sub
End if
But it doesn't work... I checked the textbox.value in the execution window and it is Null, but the if clause just doesn't work... Why?
EDIT: #Dimse, I tried "", doesn't work. And also textbox.text = Null, it pops an error telling me the textbox is not active.. Very strange.
Null is never equal to anything, not even Null. Use the IsNull() function.
If IsNull(Me.textbox.Value) Then
If you want Me.textbox treated the same when it contains an empty string as when it's Null, concatenate an empty string to it and check the length of the combined string:
If Len(Me.textbox.Value & "") = 0 Then
You could also use the named constant, vbNullString, instead of the string literal, "", for an empty string.
If Len(Me.textbox.Value & vbNullString) = 0 Then
Using the string literal requires VBA to construct that string from scratch each time. With the named constant, VBA only needs to reference it, so should be faster and use less memory. However in many (probably most) cases, the performance advantage with vbNullString would be so minor that you wouldn't notice the difference. Also see the comment below from David-W-Fenton.
For me, the more compelling reason to use vbNullString is that it's instantly recognizable to my aging eyes. Conversely, with the string literal, it takes (a tiny bit) longer for me to confirm that "" is not actually something else ... like " " or "'". The only downside with vbNullString, IMO, is that requires more typing than "".
And finally, although you don't actually need to explicitly reference the Value property (since it's the default property of a text box), I left it in because you had it that way and because I prefer to be explicit with Value, too. :-)
I also apologize for being awaking the dead, but i'm wondering that no one has considered the use of Nz Function (see it #MSDN), very popular in VBA, also usable in Access/SQL and in my opinion the more convenient, concise and powerful solution for nullable values in expressions.
I apologize if I am awaking the dead, but just for completeness sake I am going to give the code for how to test for spaces (visibly 'blank/empty') as well:
If IsNull(Me.Textbox) Or Trim(Me.Textbox) = vbNullString Then
If Trim(Me.Textbox & vbNullString) = vbNullString Then 'Shorter version
If Len(Trim(Me.Textbox) & vbNullString) = 0 Then 'Shortest version
I came here looking for how to handle spaces, empty/ZLS, & NULL's
Null is not equal to another Null ;)
try If isNull(Me.textbox.Value) Then
Expand your sub like so:
If is null(Me.textbox.Value) Or (Me.textbox.Value = "") Then
Exit Sub
End if
I think you may need to check againt "", the empty string, and not Null.
I couldn't get this to work, since I was using the KeyUP event. So instead, this is what worked for me.
If(Textbox.Text = '')
...
Since Textbox.Value only updates on change event, it wasn't updating on keyup, so Textbox.Text is what is currently in the box.
Summary: Alternatively, Use the .Text property
Just use a second criteria, that will work !!
In this case just a simple word like "check".
If Forms![Basic]![Table.Item] & "check" = "check" Then
MsgBox "Field Empty"
Else
MsgBox "Field Not Empty"
End If
I saw this somewhere and thought I'd share:
If Len(Trim(Me.txtBox.Value)) > 0 Then
Related
So, say I have the following string
THIS IS STUFF (MORE STUFF)
How would I get the string to format as such in a textbox in SSRS?
THIS IS STUFF
(MORE STUFF)
This data is pulled from a single field in a query and I will not be able to manually inject a break line.
Also, sometimes the (More Stuff) is not in the field.
Extra examples:
STUFF AND THINGS
THINGS (STUFF)
THINGS AND STUFF (MORE STUFF)
You need to insert a line break into the string, i.e. set the textbox expression as something like:
="THIS IS STUFF" & vbcrlf & "(MORE STUFF)"
So the expression in a single textbox:
Will render as:
You can see there is a line break even though the string could fit on one line.
Edit after comment
OK, we need to handle various existing strings at the report level.
To do this, I would suggest using Custom Code, i.e. a function like:
Function SplitString (fieldValue As String) As String
If IsDBNull(fieldValue) OrElse IsNothing(fieldValue) Then
SplitString = ""
Else If InStr(fieldValue, "(") > 0
SplitString = RTrim(Left(fieldValue, InStr(fieldValue, "(") - 1)) & _
vbcrlf & Right(fieldValue, Len(fieldValue) - InStr(fieldValue, "(") + 1)
Else
SplitString = fieldValue
End If
End Function
I'm suggesting this as SSRS expression are notoriously brittle, and the lack of short circuiting means that what works for one string might display #Error on another. You could get around this with numerous IIf statements but Custom Code is much neater and easier to understand.
You can call the function with an expression like:
=Code.SplitString(Fields!MYFIELD.Value)
Either in a textbox expression or as a Calculated Field in the Dataset. The above works for me on your data:
I came across this issue while doing my project. And I would like to share my steps for this. Create individual placehloders within the textbox by selecting the expression and format each as you desired. You can easily add extra line by just moving the another item(another placeholder) to next line(by pressing enter-on the keyboard)
Here I created individual placeholders inside the list, gave the names and format just as I want.
I am doing some work for someone that insists on using MS Access. I don't usually use it so I am a bit new to the whole control structure and best practices. What I am trying to achieve is to have a filter textbox on a form which, when a value is entered, it will filter the rows in the detail section. That seems like a straightforward use case. I initially tried the following behaviour as the event handler for the On Change event:
Private Sub FilterGrid()
Me.Text32.SetFocus
If Not IsNull(Me.Text32.Text) And Me.Text32.Text <> "" Then
Me.Filter = "JobNumber LIKE '*" & Me.Text32.Text & "*'"
Me.FilterOn = True
End
Else
Me.FilterOn = False
End If
End Sub
This worked perfectly until I typed something that didn't have any rows matching and the whole thing exploded with this error (and was unrecoverable without closing the form):
Run-time error '2185': You can't reference a property or method for a control unless the control has the focus.
I did some reading around and the general opinion was that .Text should not be used and .Value (or simply the Text32 without a property) should be used. That produced some very strange behaviour. The Text32.Value is ALWAYS null. I have a watch window and I can see that for the normal behaviour, Text32.Text has an actual value, but Text32.Value is NULL.
Obviously I am doing something wrong, but I don't have enough experience with Access to know what it is.
Just as an aside, another suggestion was to do Text32.SetFocus right before accessing the Text property. This doesn't resolve the error I mentioned. It still throws the exact same error.
Is anyone able to point me in the right direction here?
As you found out, the textbox's Value is only set after the control loses focus.
Conversely, the Text property is only accessible while the control has focus.
The Value property is defined as the default member for controls; that means Text32 will be implicitly the same as Text32.Value, however, depending on the context,Text32 can sometimes refer to the control itself, not just its value.
All these discrepancies can sometimes be infuriating.
To go back to the matter at hand: you have 2 ways to handle filtering.
if the list to filter is large, it's probably better that the user type their filter, then press ENTER to validate it.
if your list is not too large, you can implement filter as you type.
First case, wait for user input to be validated by ENTER.
Say your filtering textbox is called txtFilter and is located on a form whose subform is showing a datasheet (or continuous form) that you want to filter.
All you need to do is wire the textbox OnKeyDown events as such:
' We will only perform the filter if the user press the ENTER key
Private Sub txtFilter_KeyDown(KeyCode As Integer, Shift As Integer)
Select Case KeyCode
Case 13, 9
KeyCode = 0
QuickFilter
End Select
End Sub
' Perform the actual filtering on the subform
Private Sub QuickFilter()
Dim sql As String
Dim filter As String
If txtFilter.Text = vbNullString Then
' Reset the filter if the textbox is emtpy
SubForm.Form.FilterOn = False
Else
'Some common substitutions that users may have already inserted as wildchars
filter = Replace(txtFilter.Text, "%", "*")
filter = Replace("*" & filter & "*", "**", "*")
' We construct the filter SQL
sql = "([JobNumber ] LIKE """ & filter & """)"
sql = sql & " OR ([ProjectCode] LIKE """ & filter & """)"
sql = sql & " OR ([SupplierName] LIKE """ & filter & """)"
'... Add as many columns to filter on as you want
' Assign the filter to the subform
SubForm.Form.filter = sql
SubForm.Form.FilterOn = True
End If
End Sub
Second case, filter as you type
Well, it's fairly easy, we just need to add to the above solution a way to track changes as the user is typing.
This is best done through the OnChange event of the texbox.
Private Sub txtFilter_Change()
QuickFilter
End Sub
That's all you need to add.
dont use .text property
instead use .value property
text3.value=text1.value+text2.value
you dont need setfocus like .text property everytime.
it works perfectly....vba ms access
I am hoping someone can help me possibly debug the below code, as I am confused as to why it is happening.
I have a fairly simple VBScript that runs when a user logs onto a server/PC, that will create some signatures based on their active directory details. I have decided to move each section of the signature creation into a function, in order to make things a bit easier when creating new signatures.
Here is the function I am having issues with:
'Function to add job title and company
Function AddTitle
objSelection.Font.Name = "Calibri"
objSelection.Font.Bold = False
objSelection.Font.Italic = False
objSelection.Font.Size = "11"
objSelection.Font.Color = RGB(0,0,0)
If(strTitle) Then
objSelection.TypeText strTitle & Chr(11)
End If
objSelection.TypeText strCompany & Chr (11)
End Function
Now, when calling the function later on using:
'Add job title and company
AddTitle
It ignores the section within the If statement. I know that some variables need to be defined globally for them to work in a function, and strTitle is definitely defined at the beginning of my script.
Am I missing something totally obvious, as the section inside the if statement functions correctly if taken out of the if statement. Likewise, If I were to add the if statement to my script inline, and take it out of the function, it works correctly.
It is only when running from the Function.
Apparently you have a global On Error Resume Next somewhere in your script, which suppresses the "Type Mismatch" error that the line If(strTitle) Then normally would raise.
strTitle probably contains a string value, so you can't use it like a boolean value in a conditional. Change the line to something like this:
If Trim(strTitle) <> "" Then
and your code should work as expected.
Can someone help me understand why this code isn't producing expected results?
I have a form with a text box called TxtVendorSearch.
When a user begins typing into this text box, I'd like for it to start filtering the results in the form's subdatasheet.
I am starting with a fully populated datasheet, and I'm not sure why the filter blanks out the whole thing as soon as I start typing a valid filter that should leave results.
Private Sub TxtVendorSearch_KeyPress(KeyAscii As Integer)
Dim str1 As String
str1 = "[VendorID] LIKE '*" & Me.TxtVendorSearch.Value & "*' "
Me!subOrderDS1.Form.Filter = str1
Me!subOrderDS1.Form.FilterOn = True
End Sub
I had a similar problem and i searched the internet for the keyword "find as you type" AND "ms access"
i found this great article. hopefully it will solve your problem.
N.B. this article also contains the source code to use.
Do not use the KeyPress event, you're not going to be able to easily reconstruct the actual input data from within the event handler itself (when the event is triggered, the key just pressed is not yet added to the text of the textbox, meaning you're always short a the last keystroke).
Instead, use the KeyDown event, and use the textbox' .Text property instead of .Value.
.Value is only set once the focus has moved away from the box.
So your code can be simply rewritten as (make sure your KeyDown event is set in the textbox's events on the form):
Private Sub TxtVendorSearch_KeyDown(KeyCode As Integer, Shift As Integer)
' If there is no filter criteria, disable filtering '
If Len(Trim(TxtVendorSearch.Text)) = 0 Then
subOrderDS1.Form.FilterOn = False
Exit Sub
End If
' Do nothing if user hits RETURN or TAB '
If KeyAscii < 32 Then
KeyCode = 0
Exit Sub
End If
Dim str1 As String
str1 = "[VendorID] LIKE '*" & Trim$(TxtVendorSearch.Text) & "*'"
subOrderDS1.Form.Filter = str1
subOrderDS1.Form.FilterOn = True
End Sub
I used Trim() to remove any leading and trailing white-space that the user may have typed.
Last thing: you don't need to use Me. or Me! from within the form's code itself.
Doesn't hurt if you do, but it makes things a bit less legible without adding anything to the code.
Is there a way to disable entering multi-line entries in a Text Box (i.e., I'd like to stop my users from doing ctrl-enter to get a newline)?
I was able to do it on using KeyPress event.
Here's the code example:
Private Sub SingleLineTextBox_ KeyPress(ByRef KeyAscii As Integer)
If KeyAscii = 10 _
or KeyAscii = 13 Then
'10 -> Ctrl-Enter. AKA ^J or ctrl-j
'13 -> Enter. AKA ^M or ctrl-m
KeyAscii = 0 'clear the the KeyPress
End If
End Sub
The way I did it before (and the last time I worked in Access was around '97 so my memory is not so hot) was raising a key-up event and executing a VBA function. It's a similar method to what you do with an AJAX suggest text box in a modern webform application, but as I recall it could get tripped up if your Access form has other events which tend to occur frequently such a onMouseMove over the entire form object.
Using the KeyPress event means that your code will fire every time the user types. This can lead to screen flickering and other problems (the OnChange event would be the same).
It seems to me that you should use a single event to strip out the CrLf's, and the correct event would be AfterUpdate. You'd simply do this:
If InStr(Me!MyMemoControl, vbCrLf) Then
Me!MyMemoControl = Replace(Me!MyMemoControl, vbCrLf, vbNullString)
End If
Note the use of the Access global constants, vbCrLf (for Chr(10) & Chr(13)) and vbNullString (for zero-length string).
Using a validation rule means that you're going to pop up an ugly error message to your user, but provide them with little in the way of tools to correct the problem. The AfterUpdate approach is much cleaner and easier for the users, seems to me.
Thanks Ian and BIBD. I created a public sub based on your answer that is reusable.
Public Sub PreventNewlines(ByRef KeyAscii As Integer)
If KeyAscii = 10 Or KeyAscii = 13 Then KeyAscii = 0
End Sub
Private Sub textbox_KeyPress(KeyAscii As Integer)
Call PreventNewlines(KeyAscii)
End Sub
Screen flicker should never be an issue, as these are handled events, not constant polling (and it's per control further limiting the scope). Seems to me like an invalid argument, as every text editor is executing some code per keystroke.
Thanks
not entirely sure about that one, you should be able to remove the line breaks when you render the content though, or even run a vbscript to clear it out, you just need to check for chr(13) or vbCrLf.
If you don't want an event interfering, you can set up the Validation Rule property for the textbox to be
NOT LIKE "*"+Chr(10)+"*" OR "*"+Chr(13)+"*"
You will probably also want to set the Validation Text to explain specifically why Access is throwing up an error box.
Jason's response works well. Just to add to it..
If you want to allow the user to leave the text box blank, you could use this:
Not Like ""+Chr(10)+"" Or ""+Chr(13)+"" Or Is Null