I've written a VBA function that takes two parameters, the first is a string and the 2nd is a range, specified in the sheet as:
=strPack(B1,G3)
In the code, this routine is declared as:
Public Function strPack(ByVal strHex As String, ByRef rngCnt As Range) As String
On Error Goto ErrHandler
If False Then
ErrHandler:
MsgBox Err.Description
Exit Function
End If
Dim intCnt As Integer
intCnt = 0
'...do something with strHex and increment intCnt whilst we go
rngCnt.Value = CStr(intCnt)
'strPack is populated by the body of the function
strPack = "Hello World"
End Function
I've tried .Value, .Value2 and .Text, all result in an error:
Application-defined or object-defined error
When I look in the debugger, both strHex and rngCnt are valid and correct. Why can't I assign to the range and how do I fix it?
The error handler is not the problem, try it out, it works perfectly well and is a standard way of picking up errors and aborting a function when an error occurs.
[Edit] I've just tried the following:
Public Sub updateCount()
Worksheets("Sheet1").Range("G3").Value = CStr(intProcessed)
End Sub
intProcessed is global to the module and is an integer, result is the same, exactly the same error.
[Edit2] I want to remove this post as I've changed the approach now to call another subroutine that returns a value which is dropped into the cell. I can't delete it! Thank you to all for your help.
See the code comments:
Public Function strPack(ByVal strHex As String, ByVal rngCnt As Range) As String
Dim lRes As Long
On Error GoTo errHandler
lRes = 1000 '==> Your business logic goes here
'/ This is the gymnastics you do to update range from an UDF
Application.Evaluate ("UpdateRange(" & rngCnt.Address & "," & lRes & ")")
strPack = "SUCCESSFULL"
errHandler:
If Err.Number <> 0 Then
strPack = "FAILED"
End If
End Function
'/ Helper to allow range update from UDF
Private Function UpdateRange(rngDest As Range, val As Variant)
rngDest.Value = val
End Function
Related
I am trying to utilize Vlookup function, according to the Textbox1 value user put in in Userform Guntest, automatically looking for corresponding features of the gun.
However the program currently doesn't run as it reminds me
'Runtime error '1004', method 'Range of object' _Global' failed.
The error appears on Retrieve1=…
I will be appreciated if you could help me to check where the problem is as I have really limited knowledge and experience on using VBA.
Thanks in advance.
It looks like some objects is undefined but I can't figure out where.
The module 1 code is:
Public Guncode As String
Option Explicit
Sub Test()
Call Vlookup
End Sub
Sub Vlookup()
Dim Retrieve1 As String
Dim Retrieve2 As String
Dim FinalRow As Long
Dim FinalColumn As Long
Dim WholeRange As String
If GunTest.TextBox1 = "" Then
Exit Sub
If GunTest.TextBox1 <> "" Then
MsgBox Guncode
End If
End If
With Sheets(1)
FinalRow = Range("A65536").End(xlUp).Row
FinalColumn = Range("IV1").End(xlToLeft).Column
WholeRange = "A2:" & CStr(FinalColumn) & CStr(FinalRow)
Retrieve1 = Application.WorksheetFunction.Vlookup(Trim(Guncode), Range(WholeRange), 1, False) 'Locate specific tool according to QR code number
Retrieve2 = Application.WorksheetFunction.Vlookup(Trim(Guncode), Range(WholeRange), 5, False) 'Locate specific gun type according to QR code number
If Guncode = "" Then
MsgBox "This gun doesn't exist in database!"
Else
MsgBox "The tool number is:" & Retrieve1 & vbCrLf & "The gun type is:" & Retrieve2
End If
End With
End Sub
The userform code is:
Option Explicit
Private Sub Label1_Click()
End Sub
Private Sub CommandButton1_Click()
If TextBox1 = "" Then Exit Sub 'Set condition 1 of exiting the program
Guncode = GunTest.TextBox1
With Me
Call Module1.Test
End With
End Sub
Private Sub PartID_Click()
End Sub
Private Sub TextBox1_Change()
End Sub
Private Sub UserForm_Click()
End Sub
It should run properly but it doesn't. Any help would be appreciated, thanks!
First off, you were passing in a number as the column letter value. CSTR() doesnt magically transform it into the letter equivalent but I like your enthusiasm.
Second, your method will bomb if the value isnt found - so you'll need to write your own error handling for it.
Sub Vlookup()
Dim Retrieve1 As String
Dim Retrieve2 As String
Dim FinalRow As Long
Dim FinalColumn As Long
Dim WholeRange As String
Dim vArr
Dim col_Letter As String
If GunTest.TextBox1 = "" Then
Exit Sub
If GunTest.TextBox1 <> "" Then
MsgBox Guncode
End If
End If
With ThisWorkbook.Sheets("Sheet1")
FinalRow = .Range("A65536").End(xlUp).Row
FinalColumn = .Range("IV1").End(xlToLeft).Column
vArr = Split(Cells(1, FinalColumn).Address(True, False), "$")
col_Letter = vArr(0)
WholeRange = "A2:" & col_Letter & CStr(FinalRow) '<---- you were passing a number in as the column value
Retrieve1 = Application.WorksheetFunction.Vlookup(Trim(Guncode), .Range(WholeRange), 1, False) 'Locate specific tool according to QR code number
Retrieve2 = Application.WorksheetFunction.Vlookup(Trim(Guncode), .Range(WholeRange), 5, False) 'Locate specific gun type according to QR code number
If Guncode = "" Then
MsgBox "This gun doesn't exist in database!"
Else
MsgBox "The tool number is:" & Retrieve1 & vbCrLf & "The gun type is:" & Retrieve2
End If
End With
End Sub
1. I am not sure what is the reason using Address(True, False) for row number.
This comes from a combination of these two functions. The true/false setting is telling the funciton to use/not use absolute references in the address.
Split ( expression [,delimiter] [,limit] [,compare] )
https://www.techonthenet.com/excel/formulas/split.php
expression.Address (RowAbsolute, ColumnAbsolute, ReferenceStyle, External, RelativeTo)
https://learn.microsoft.com/en-us/office/vba/api/excel.range.address
Shouldn't Cell (1, FinalColumn) stands for the column number?
No, the cells fucntiosn basically returns an intersection/address of rows & column.
Try this for example: debug.Print; thisworkbook.Sheets("Sheet1").Cells(2,2)
You mentioned CSTR doesn't magically transform to letter equivalent so what would it transform to? Could you further elaborate?
This is a data type conversion function. CSTR(666) essentially does this: this 666 becomes this "666"
2. vArr(0). I am confused with what does the parameter 0 stands for in the bracket. Actually this is a general question I always have regarding to parameter specification.
This is an array position refence. The split function returns an array of strings. Since we're using to capture the column label value, we only need to reference the first position.
(3) I tried copy your code and run it but still reminds me error on the same row.
Works fine for me unless there is no returning value, which returns an error which is what I meant by "bomb."
I'm trying to determine if a named range has been set via VBA. The named range is called LoadedToken and essentially is loaded when a user clicks a particular button. I use this as proof that initialisation has taken place.
I have a function to check if this has taken place:
Function ToolIsEnabled()
' We check if the R2A add-in has been loaded by detecting the named range
If ActiveWorkbook.Names("LoadedToken") Is Nothing Then
ToolIsEnabled = False
Else
ToolIsEnabled = True
End If
End Function
and I get an application error. Of course, the VBA is incorrect. However how can I actually accomplish this?!
Sub Test()
Debug.Print IsNamedRange("Bumsti")
End Sub
Function IsNamedRange(RName As String) As Boolean
Dim N As Name
IsNamedRange = False
For Each N In ActiveWorkbook.Names
If N.Name = RName Then
IsNamedRange = True
Exit For
End If
Next
End Function
Usage in OP context could be
' ...
If IsNamedRange("LoadedToken") Then
' ...
End If
' ...
or - if a program specific Bool needs to be set
' ...
Dim IsTokenLoaded as Boolean
IsTokenLoaded = IsNamedRange("LoadedToken")
' ...
Both constructs make it pretty clear in the source code what you are aiming for.
You can achieve this by using error handling:
Function ToolIsEnabled() As Boolean
Dim rng As Range
On Error Resume Next
Set rng = ActiveWorkbook.Range("LoadedToken")
On Error GoTo 0
ToolIsEnabled = Not rng is Nothing
End Function
This will check either in ThisWorkbook or a named workbook and return TRUE/FALSE.
Sub Test()
MsgBox NamedRangeExists("SomeName")
MsgBox NamedRangeExists("SomeOtherName", Workbooks("Book1.xls"))
End Sub
Public Function NamedRangeExists(sName As String, Optional Book As Workbook) As Boolean
On Error Resume Next
If Book Is Nothing Then
Set Book = ThisWorkbook
End If
NamedRangeExists = Book.Names(sName).Index <> (Err.Number = 0)
On Error GoTo 0
End Function
Edit:
A shorter version if it's only going to look in ThisWorkbook:
Public Function NamedRangeExists(sName As String) As Boolean
On Error Resume Next
NamedRangeExists = ThisWorkbook.Names(sName).Index <> (Err.Number = 0)
On Error GoTo 0
End Function
For the activeworkbook, you could also call the old XLM NAMES() function:
Function IsNameInActiveWorkbook(sName As String) As Boolean
IsNameInActiveWorkbook = Not IsError(Application.ExecuteExcel4Macro("MATCH(""" & sName & """,NAMES(),0)"))
End Function
As per Tom's answer these 2 line should do the trick:
On Error Resume Next
Set TestRange = ActiveWorkbook.Range("LoadedToken") 'if it does **not** exist this line will be ERROR
These if ... then statements are getting the wrong results in my opinion. The first is returning the value 'false' when it should be 'true'. The fourth returns the right value. The second and third return an error.
Sub empty_array()
Dim arr1() As Variant
If IsEmpty(arr1) Then
MsgBox "hey"
End If
If IsError(UBound(arr1)) Then
MsgBox "hey"
End If
If IsError(Application.match("*", (arr1), 0)) Then
MsgBox "hey"
End If
ReDim arr1(1)
arr1(1) = "hey"
If IsEmpty(arr1) Then
MsgBox "hey"
End If
End Sub
Arr1 becomes an array of 'Variant' by the first statement of your code:
Dim arr1() As Variant
Array of size zero is not empty, as like an empty box exists in real world.
If you define a variable of 'Variant', that will be empty when it is created.
Following code will display "Empty".
Dim a as Variant
If IsEmpty(a) then
MsgBox("Empty")
Else
MsgBox("Not Empty")
End If
Adding into this: it depends on what your array is defined as. Consider:
dim a() as integer
dim b() as string
dim c() as variant
'these doesn't work
if isempty(a) then msgbox "integer arrays can be empty"
if isempty(b) then msgbox "string arrays can be empty"
'this is because isempty can only be tested on classes which have an .empty property
'this do work
if isempty(c) then msgbox "variants can be empty"
So, what can we do? In VBA, we can see if we can trigger an error and somehow handle it, for example
dim a() as integer
dim bEmpty as boolean
bempty=false
on error resume next
bempty=not isnumeric(ubound(a))
on error goto 0
But this is really clumsy... A nicer solution is to declare a boolean variable (a public or module level is best). When the array is first initialised, then set this variable.
Because it's a variable declared at the same time, if it loses it's value, then you know that you need to reinitialise your array.
However, if it is initialised, then all you're doing is checking the value of a boolean, which is low cost. It depends on whether being low cost matters, and if you're going to be needing to check it often.
option explicit
'declared at module level
dim a() as integer
dim aInitialised as boolean
sub DoSomethingWithA()
if not aInitialised then InitialiseA
'you can now proceed confident that a() is intialised
end sub
sub InitialiseA()
'insert code to do whatever is required to initialise A
'e.g.
redim a(10)
a(1)=123
'...
aInitialised=true
end sub
The last thing you can do is create a function; which in this case will need to be dependent on the clumsy on error method.
function isInitialised(byref a() as variant) as boolean
isInitialised=false
on error resume next
isinitialised=isnumeric(ubound(a))
end function
#jeminar has the best solution above.
I cleaned it up a bit though.
I recommend adding this to a FunctionsArray module
isInitialised=false is not needed because Booleans are false when created
On Error GoTo 0 wrap and indent code inside error blocks similar to with blocks for visibility. these methods should be avoided as much as possible but ... VBA ...
Function isInitialised(ByRef a() As Variant) As Boolean
On Error Resume Next
isInitialised = IsNumeric(UBound(a))
On Error GoTo 0
End Function
I would do this as
if isnumeric(ubound(a)) = False then msgbox "a is empty!"
I may be a bit late, but following simple stuff works with string arrays:
Dim files() As String
files = "..." 'assign array
If Not Not files Then
For i = LBound(files) To UBound(files)
'do stuff, array is not empty
Next
End If
That's all the code for this.
Above methods didn´t work for me. This did:
Dim arrayIsNothing As Boolean
On Error Resume Next
arrayIsNothing = IsNumeric(UBound(YOUR_ARRAY)) And False
If Err.Number <> 0 Then arrayIsNothing = True
Err.Clear
On Error GoTo 0
'Now you can test:
if arrayIsNothing then ...
this worked for me:
Private Function arrIsEmpty(arr as variant)
On Error Resume Next
arrIsEmpty = False
arrIsEmpty = IsNumeric(UBound(arr))
End Function
The problem with VBA is that there are both dynamic and static arrays...
Dynamic Array Example
Dim myDynamicArray() as Variant
Static Array Example
Dim myStaticArray(10) as Variant
Dim myOtherStaticArray(0 To 10) as Variant
Using error handling to check if the array is empty works for a Dynamic Array, but a static array is by definition not empty, there are entries in the array, even if all those entries are empty.
So for clarity's sake, I named my function "IsZeroLengthArray".
Public Function IsZeroLengthArray(ByRef subject() As Variant) As Boolean
'Tell VBA to proceed if there is an error to the next line.
On Error Resume Next
Dim UpperBound As Integer
Dim ErrorNumber As Long
Dim ErrorDescription As String
Dim ErrorSource As String
'If the array is empty this will throw an error because a zero-length
'array has no UpperBound (or LowerBound).
'This only works for dynamic arrays. If this was a static array there
'would be both an upper and lower bound.
UpperBound = UBound(subject)
'Store the Error Number and then clear the Error object
'because we want VBA to treat unintended errors normally
ErrorNumber = Err.Number
ErrorDescription = Err.Description
ErrorSource = Err.Source
Err.Clear
On Error GoTo 0
'Check the Error Object to see if we have a "subscript out of range" error.
'If we do (the number is 9) then we can assume that the array is zero-length.
If ErrorNumber = 9 Then
IsZeroLengthArray = True
'If the Error number is something else then 9 we want to raise
'that error again...
ElseIf ErrorNumber <> 0 Then
Err.Raise ErrorNumber, ErrorSource, ErrorDescription
'If the Error number is 0 then we have no error and can assume that the
'array is not of zero-length
ElseIf ErrorNumber = 0 Then
IsZeroLengthArray = False
End If
End Function
I hope that this helps others as it helped me.
I'm using this
If UBound(a) >= 0 Then
' not empty
Else
' empty... UBound(a) = -1
End If
IsEmpty(a) did not work for me... I hate VBA
Dim arr() As Variant
Debug.Print IsEmpty(arr) ' False
Debug.Print UBound(arr) ' raises error
arr = Array()
Debug.Print IsEmpty(arr) ' False
Debug.Print UBound(arr) ' -1
ReDim Preserve arr(UBound(arr) + 1)
arr(UBound(arr)) = "test"
Debug.Print IsEmpty(arr) ' False
Debug.Print UBound(arr) ' 0
The below function works for both static and dynamic arrays.
Function array_Empty(testArr As Variant) As Boolean
Dim i As Long, k As Long, flag As Long
On Error Resume Next
i = UBound(testArr)
If Err.Number = 0 Then
flag = 0
For k = LBound(testArr) To UBound(testArr)
If IsEmpty(testArr(k)) = False Then
flag = 1
array_Empty = False
Exit For
End If
Next k
If flag = 0 Then array_Empty = True
Else
array_Empty = True
End If
End Function
Tente isso:
Function inic(mtz As Variant) As Boolean
On Error Resume Next
Dim x As Boolean
x = UBound(mtz): inic = x
End Function
...
if inic(mymtz) then
debug.print "iniciada"
else
debug.print "não iniciada"
end if
I've got the following:
Private Sub cmdColumnLetter_Click()
Dim colRange As Range
Set colRange = Excel.Application.InputBox( _
Prompt:="Please Select Any Cell In ""Splitter"" Column", _
Title:="Column", _
Default:=fTableRange.Columns(1).Column, Type:=8)
fColNumber = colRange.Column
TxBoxColumnNum = fColNumber
End Sub
If the user hits cancel then Set colRange = fails as it is looking to assign an object to this variable. Do I have to use an On Error structure to defend against this error or is there a more elegant approach?
Different syntax for assigning objects and values is, IMO, one drawback of VBA.
As such, functions as InputBox returning objects or values cause errors.
However, function arguments passing syntax is same.
Exploring this, I purpose and alternative solution, indeed not better then error handling solution:
Function SetObject(v, ByVal ExpectedTypeName As String) As Object
If TypeName(v) = ExpectedTypeName Then Set SetObject = v
End Function
Private Sub cmdColumnLetter_Click()
Dim colRange As Range
Set colRange = SetObject(Excel.Application.InputBox("input", Type:=8), "Range")
If Not colRange Is Nothing Then
Debug.Print "..."
End If
End Sub
SetObject accepts either an object or a value, but always retuns given object if typename matchs expected one or Nothing if doesn't match.
Yes, you will have to OERN
Sub Test()
Dim colRange As Range
Dim fColNumber As Long, TxBoxColumnNum As Long
On Error Resume Next
Set colRange = Excel.Application.InputBox( _
Prompt:="Please Select Any Cell In ""Splitter"" Column", _
Title:="Column", Default:=fTableRange.Columns(1).Column, Type:=8)
On Error GoTo 0
If colRange Is Nothing Then Exit Sub
fColNumber = colRange.Column
TxBoxColumnNum = fColNumber
End Sub
I'm trying to write a UDF that returns whether the cell is at a page break.
So far I have this:
Function pbreak() As Boolean
' Application.Volatile
pbreak = False
Dim ra As Range
Set ra = Application.Caller
With ra
For i = 1 To .Worksheet.HPageBreaks.Count
If .Worksheet.HPageBreaks(i).Location.Row = .Row Then
pbreak = True
End If
Next
End With
End Function
This returns a #VALUE error. I've tried debugging it, HPageBreaks.Count returns 3 (and there are 3 page breaks), but HPageBreaks(i) yields an "index out of range"-error for all pagebreaks that are below the current cell .
Is this a bug (ie .Count is wrong), or is there some special behavior with page breaks that I am missing?
Is there a way to fix this (preferably without resorting to on error resume next)?
Thanks
Martin
Option Explicit
Function pbreak() As Boolean
' Application.Volatile
Dim i As Integer 'the missing line
pbreak = False
Dim ra As Range
Set ra = Application.Caller
With ra
For i = 1 To .Worksheet.HPageBreaks.Count
If .Worksheet.HPageBreaks(i).Location.Row <= .Row Then
If .Worksheet.HPageBreaks(i).Location.Row = .Row Then
pbreak = True
'exit the function once a page break is found.
Exit Function
End If
Else
Exit Function
End If
Next
End With
End Function
EDIT: Always use Option Explicit & compile the code before using it.
Use of Exit Function inside the loop is to prevent the code from running it further, once the result is known.