VBA Function that replaces placeholders in a string

Dstars21

New Member
Joined
Oct 5, 2019
Messages
8
i am currently trying to make a VBA function that replaces placeholders in a string with a value on an excel spreadsheets.

I'd like it to be able to take any number of placeholders, for example:

{} are not {}.

input values for the function: Dogs, Cats

Therefore, the function would return : {dogs} are not {cats}.

Does anyone have any pointers as to how to set this up? New to VBA, any help is appreciated!
 

Excel Facts

Whats the difference between CONCAT and CONCATENATE?
The newer CONCAT function can reference a range of cells. =CONCATENATE(A1,A2,A3,A4,A5) becomes =CONCAT(A1:A5)
The example below uses named ranges, and whereby the value in A1 is amended by changing the values in D2, D3 or D4

Excel 2016 (Windows) 32 bit
[Table="width:, class:head"][tr=bgcolor:#E0E0F0][th] [/th][th]
A
[/th][th]
B
[/th][th]
C
[/th][th]
D
[/th][th]
E
[/th][/tr]
[tr=bgcolor:#FFFFFF][td=bgcolor:#E0E0F0]
1
[/td][td][/td][td] formula in A1[/td][td]Named Range[/td][td][/td][td] Named range refers to[/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E0E0F0]
2
[/td][td]cats are neither dogs nor mice[/td][td] =N_1&" are neither "&N_2 &" nor " & N_3[/td][td]N_1[/td][td]cats[/td][td] =Sheet3!$D$2[/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E0E0F0]
3
[/td][td][/td][td][/td][td]N_2[/td][td]dogs[/td][td] =Sheet3!$D$3[/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E0E0F0]
4
[/td][td][/td][td][/td][td]N_3[/td][td]mice[/td][td] =Sheet3!$D$4[/td][/tr]
[/table]
[Table="width:, class:grid"][tr][td]Sheet: Sheet3[/td][/tr][/table]

VBA
- using Named Ranges is not necessary but simple to illustrate
- what determines replacement value for each placeholder (N_1, N_2, N_3)
 
Upvote 0
Is this what you want ?

String : The {} is in the {}, but the {} is in the {} whereas the {} is in the {}
Values : mottled cat,water,black dog,flower garden,stripey tiger,jungle
Result : The mottled cat is in the water, but the black dog is in the flower garden whereas the stripey tiger is in the jungle

Code:
Sub CallFunction()
    Dim a As String, b As String
    a = "The {} is in the {}, but the {} is in the {} whereas the {} is in the {}"
    b = "mottled cat,water,black dog,flower garden,stripey tiger,jungle"
    MsgBox ReplaceAll(a, b)
End Sub
Code:
Function ReplaceAll(aStr As String, Vals As String) As String
    Dim arr As Variant, i As Integer, c As Integer
    Const P = "{}"
    If InStr(aStr, P) = 0 Then GoTo TheEnd
    arr = Split(Vals, ",")
    aStr = "@" & aStr & "@"                 'add leading\trailing characters
    
    For i = 0 To UBound(arr)
        c = InStr(aStr, P)
        If c = 0 Then Exit For
        aStr = Left(aStr, c - 1) & arr(i) & Mid(aStr, c + 2, Len(aStr))
    Next
    aStr = Mid(aStr, 2, Len(aStr) - 2)      'remove leading\trailing characters

TheEnd:
    ReplaceAll = aStr
End Function
 
Last edited:
Upvote 0
Another way:

Code:
[FONT=Lucida Console][COLOR=Royalblue]Sub[/COLOR] a1113703a()
[I][COLOR=Dimgray]'https://www.mrexcel.com/forum/excel-questions/1113703-vba-function-replaces-placeholders-string.html[/COLOR][/I]
[COLOR=Royalblue]Dim[/COLOR] tx [COLOR=Royalblue]As[/COLOR] [COLOR=Royalblue]String[/COLOR], sInput [COLOR=Royalblue]As[/COLOR] [COLOR=Royalblue]String[/COLOR]

tx = [COLOR=Darkcyan]"I am currently {} to make a {}  that replaces {} in a {}"[/COLOR]
    sInput = [COLOR=Darkcyan]"trying:VBA function:placeholders:string"[/COLOR] 'input separated by [COLOR=Darkcyan]":"[/COLOR]
        MsgBox toReplace(tx, sInput)

[COLOR=Royalblue]End[/COLOR] [COLOR=Royalblue]Sub[/COLOR]


[COLOR=Royalblue]Function[/COLOR] toReplace(tx1 [COLOR=Royalblue]As[/COLOR] [COLOR=Royalblue]String[/COLOR], sInput1 [COLOR=Royalblue]As[/COLOR] [COLOR=Royalblue]String[/COLOR]) [COLOR=Royalblue]As[/COLOR] [COLOR=Royalblue]String[/COLOR]
[COLOR=Royalblue]Dim[/COLOR] n [COLOR=Royalblue]As[/COLOR] [COLOR=Royalblue]Long[/COLOR], i [COLOR=Royalblue]As[/COLOR] [COLOR=Royalblue]Long[/COLOR], x

n = [COLOR=Royalblue]UBound[/COLOR](Split(tx1, [COLOR=Darkcyan]"{}"[/COLOR]))

[COLOR=Royalblue]For[/COLOR] [COLOR=Royalblue]Each[/COLOR] x In Split(sInput1, [COLOR=Darkcyan]":"[/COLOR])
    i = i + [COLOR=Brown]1[/COLOR]
    tx1 = WorksheetFunction.Replace(tx1, WorksheetFunction.Find([COLOR=Darkcyan]"{}"[/COLOR], tx1), [COLOR=Brown]2[/COLOR], [COLOR=Darkcyan]"{"[/COLOR] & x & [COLOR=Darkcyan]"}"[/COLOR])
    [COLOR=Royalblue]If[/COLOR] i = n [COLOR=Royalblue]Then[/COLOR] [COLOR=Royalblue]Exit[/COLOR] [COLOR=Royalblue]For[/COLOR]
[COLOR=Royalblue]Next[/COLOR]

toReplace = tx1

[COLOR=Royalblue]End[/COLOR] [COLOR=Royalblue]Function[/COLOR][/FONT]
 
Upvote 0
The code in post #4 can be simplified to this:

Code:
[FONT=Lucida Console][COLOR=Royalblue]Sub[/COLOR] a1113703a()
[I][COLOR=Dimgray]'https://www.mrexcel.com/forum/excel-questions/1113703-vba-function-replaces-placeholders-string.html[/COLOR][/I]
[COLOR=Royalblue]Dim[/COLOR] tx [COLOR=Royalblue]As[/COLOR] [COLOR=Royalblue]String[/COLOR], sInput [COLOR=Royalblue]As[/COLOR] [COLOR=Royalblue]String[/COLOR]

tx = [COLOR=Darkcyan]"I am currently {} to make a {}  that replaces {} in a {}"[/COLOR]
    sInput = [COLOR=Darkcyan]"trying:VBA function:placeholders:string"[/COLOR] 'input separated by [COLOR=Darkcyan]":"[/COLOR]
        MsgBox toReplace(tx, sInput)

[COLOR=Royalblue]End[/COLOR] [COLOR=Royalblue]Sub[/COLOR]


[COLOR=Royalblue]Function[/COLOR] toReplace(tx1 [COLOR=Royalblue]As[/COLOR] [COLOR=Royalblue]String[/COLOR], sInput1 [COLOR=Royalblue]As[/COLOR] [COLOR=Royalblue]String[/COLOR]) [COLOR=Royalblue]As[/COLOR] [COLOR=Royalblue]String[/COLOR]
[COLOR=Royalblue]Dim[/COLOR] x

[COLOR=Royalblue]For[/COLOR] [COLOR=Royalblue]Each[/COLOR] x In Split(sInput1, [COLOR=Darkcyan]":"[/COLOR])
    tx1 = Replace(tx1, [COLOR=Darkcyan]"{}"[/COLOR], [COLOR=Darkcyan]"{"[/COLOR] & x & [COLOR=Darkcyan]"}"[/COLOR], [COLOR=Brown]1[/COLOR], [COLOR=Brown]1[/COLOR])
[COLOR=Royalblue]Next[/COLOR]

toReplace = tx1

[COLOR=Royalblue]End[/COLOR] [COLOR=Royalblue]Function[/COLOR][/FONT]

the result:
I am currently {trying} to make a {VBA function} that replaces {placeholders} in a {string}

but if you want the result without the "{}", then change this part:

tx1 = Replace(tx1, "{}", "{" & x & "}", 1, 1)

with this:

tx1 = Replace(tx1, "{}", x, 1, 1)

the result:
I am currently trying to make a VBA function that replaces placeholders in a string
 
Last edited:
Upvote 0

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