Encode / Decode A Byte Array To / From Base64 Format
May 29, 2014
I am trying to make an encode/decode function to use in excel from base64 to array of bytes
I want to put string encoded in base64 in cell1 and get result in cell2 with decoded array of bytes and vice versa i find some codes [URL]....
and a code here
[URL]....
using the code above to convert A1
A1 = a03060fa564665
ENCODEBASE64(A1) -> YTAzMDYwZmE1NjQ2NjU= (which is correct result for string "a03060fa564665" not the array of bytes)
while correct result i need is oDBg+lZGZQ==
i know the issue is converting string to array of bytes but i couldn't fix it myself
example
if cell1= a03060fa564665
result1= oDBg+lZGZQ==
if cell2= oDBgm1BGaQ==
result2= a030609b504669
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Apr 18, 2007
I have a function that will be used across 10K+ records at a time, so I was taking a look at optimizing it a bit. At the start of the routing I have a string with a 9 to 15 digit numeric value in it. I wanted to load each individual digit into a byte array. I started out using:
byVal = StrConv(sVal,vbFromUnicode)
But that actually loads the ASCII Character codes into the array not the digits themselves. From there I considered looping through the array applying CByte(Chr$(byVal(i))) but then I wondered if it would make more sense to just load the array with Mid$(sVal,i,1)... Does anyone have tested knowledge on which performs better? Is there an option C I have missed?
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Sep 6, 2007
I have a byte array that contains a 4 byte floating point number. How would I convert this byte array to the single typed floating point number it contains?
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Nov 7, 2012
This code convert jpg to base64. Well base64 to jpg convert possible?
Code:
Public Function EncodeFile(strPicPath As String) As String
Const adTypeBinary = 1 ' Binary file is encoded
' Variables for encoding Dim objXML Dim objDocElem
' Variable for reading binary picture Dim objStream
' Open data stream from picture
Set objStream = CreateObject("ADODB.Stream")
[Code] ........
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Jun 24, 2014
I have a worksheet that contains data but column E has blank cells. i want to automatically encode on the last blank cell in column E up to the last used row.
I am using the ff. code to select the last blank cell in column E:
Range("E1").End(xlDown).Offset(1, 0).Select
I am using the ff. code to select the last used row:
ActiveSheet.UsedRange.Rows.Select
but it doesn't work.
In my excel file, all i want to do is to encode "ECASE-UNUSABLE-UPD" in cell E61:1549 , wherein E61 = is the last blanck cell & E1549 = is the last used row.
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Jun 11, 2013
I need to use SQL decode functionality in Excel. I tried but Excel won't accept decode. Is there a way to get the same effect in Excel?
Example: quite often, people use letters to represent numbers, like 1234D = 123.44, 5432G=543.27 in text files. To converter from letters to numbers, I can use decode (substr(A1,5,1), 'A', 1, 'B',2,'C',3,......,'{', 0, null).
Not sure how Excel handles this?
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Aug 10, 2006
there is a vba function that is similar to a sql decode command. Something similar to this....
decode(variable,"jan","01","feb","02","mar"03"....)
In this example, the function will return the month number when given the month name.
does a command like this exist?
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Jul 30, 2012
in C a string is nothing more than an Array of characters ending with a null character.
in VBA this does not seem to be the case.I am trying to use the BlowFish code from David Midkiff for some encryption, however the code sometimes fails:
When encrypting a string a string of a specific length should be returned. however sometimes one of the characters of the encrypted string is a null character, and the returned encrypted string (with a embedded null character) is causing me problems. I want to check for the null character and if present redo the encryption. But how do I check for the presence of this null character in a unicode (double-byte) string?
Checking with Len(encrypted) gives the correct length (!) but trying to move each (unicode)character into an array fails when using the Mid() function past the null character in the string.
Now I can use
byteArray() = StrConv(unicodetext,vbFromUnicode)
to get the lower byte of each character into an array easily, but how do I do this for both bytes of the unicode characters?
Using an integer array does not work other than through
intArray(j) = CInt(AscW(Mid(Outp, j, 1)))
which fails on the nullstring in my encrypted text.
I have tried with variants but so far no luck. I thought if the string was entered into a variant then I could also address the variant as an array of bytes, but that does not seem to be accepted by VBA.
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Sep 11, 2007
we would use a byte data type as a counter in a For Loop, but just today I have been having trouble with this. When I try to count backwards with " Step -1" I get an "error 6: overflow" on the FOR LOOP line. When I count forwards it works fine.
For example ....
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Mar 16, 2014
I have text in an array (there are formula in all the fields) and I would like to arrange this text so that it is in a list format.
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Jun 19, 2014
How to conditionally format an array formula? The basic formula is an index(match criteria1 and match criteria2. I have come across sites where they mention you can incorporate aggregate into the formula to remove the Alt+Ctrl+Shift thus allowing for the formula to work in conditional formatting. Shown below is the formula I am trying to use. Basically if the formula below = today() then be yellow.
{=IFERROR(INDEX(Table2[Comp Req Date],MATCH(1,([@[SLDR_EF]]=
Table2[Component Material])*([@[Grand Sequence]]=Table2[Order Seq Num]),0)),"")}
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Feb 25, 2009
This has been kicking my can all morning! Should be simple. I'm trying to conditionally format an array from the value of a single cell.
=IF(A1<80, A3:A24,RED,0)
=IF(A1>80,A3:A24,GREEN,0)
=IF(A1>120,A3:A24,BLUE,0)
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Jul 17, 2013
I have a list of data for each year dating back 10 years and some of lists had entries that weren't available so the cell showed up #N/A. I searched and replaced them with 0 but when I graph the data it skews my graph. I was wondering if it was possible to take a logic (IF) statement that says if the cell = 0 then take the average of the next and previous data points so the graph looks smooth. i.e. =IF(G444=0,(G443+G445)/2,G444) This gives me the correct number i want, but i want to apply it to all my lists like a format if possible.
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Sep 17, 2008
I have a VBA subroutine that builds a list of dates in an array and then copies this to the worksheet using worksheetfunction.transpose. The array is two dimensional and therefore uses the variant data type.
This works fine in Excel 2002. In Excel 2003 the array is fine until the Transpose function is used, at this point they are changed from dd/mm/yyyy to mm/dd/yyyy. This means that some dates are changed (eg: 01/Mar/2008 becomes 03/Jan/2008) and some are written as strings (eg: 17/Mar/2008 becomes the string "17/03/2008" and cannot be operated on as a date).
I'm aware that there was a hotfix to deal with a similar issue regarding recalculation but this is on Excel 2003 SP3 which should already have that hotfix in place.
I have reduced my code down to a basic demonstration showing the problem. This assumes the worksheet contains some dates in "A2:A32". I have also attached the workbook containing this code.
VB:
Private Sub CommandButton1_Click()
Dim a() As Variant, c As Integer
Redim a(1 To 31)
For c = 1 To 31
a(c) = Cells(1 + c, 1)
Next c
Range("D2:D32") = WorksheetFunction.Transpose(a)
End Sub
I have fixed this problem by looping through each element of the array and writing them individually in to cells but this is far slower so I'd like to know if there is a better solution than that.
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Sep 9, 2012
I am trying to populate many arrays with the same code using something like this. For this test, assume the following data in A1.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Code:
Sub populate()
Dim firstArr(5), secondArr(5), thirdArr(5), fourthArr(5), fifthArr(5) As Integer
Dim r, c, num As Integer
[Code]....
The above code does not work of course and falls over. I am unsure whether I should try and concatenate with something like this eg "" & arrName(i) = Cells (r,c) or go down a different route.
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Dec 20, 2013
I need to export this to Xcelsius which doesn't support any macros/vba. Btw I can;'t use Row() in xcelsius too.
[Code].....
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Oct 2, 2008
I have a class module with several private variables, including one that is an array of a user-defined type. I am trying to set the values of a single element of this array with "Property Let ..." from a string array:
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Apr 7, 2009
Say I have 3 columns of data: A1:C10 and I want to run a Match() function on them all together to see if I get a match any one those cells, say the value of have in X1.
Since, Match only allows a One-Column lookup array.. is there a way to "concatenate" or "append" the 3 columns together within a formula so now I would be looking to Match in an array that is 1 column * 30 rows?
Basically want to convert =Match(X1,A1:C10,0) to =Match(X1,A1:A30,0) without moving around the raw data in the sheet.
And I want to avoid doing an AND or OR formula that uses 3 separate MATCH() for each column.
I have a hunch that the MMULT or MMULT/TRANSPOSE functions are involved, but can't seem to get it right.
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May 2, 2013
I'm only starting to get to grips with arrays. I have what I consider to be a lot of data that I need to 'cut' into separate workbooks. I have written some code that does this by simply looping through each line, 250k+, checking against a variable and copying the row into a separate sheet. This took longer than it would have doing it manually. It was suggested to me that I use arrays to speed up the process. I have managed to store the test data into an array but am struggling to find a way to loop through and pull out an entire 'row' from the array based on a variable. I have looked for 2 days in various places to find some way to loop through the data held in the array, but to no avail.
That code will appear here from about 8am GMT tomorrow. I know that once I've cracked this I'm on the road to some very significant time saving and comprehensive report writing.
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Aug 5, 2014
I want to pass an array to Offset in the "Height" parameter, without having to type the array.
{=MAX(SUBTOTAL(9,(OFFSET(A1,ROW(1:5),,{1,2,3,4,5}))))}
I can't seem to figure out how to build the {1,2,3,4,5}. I've tried another ROW(1:5) and have tried nesting that like N(ROW(1:5)) but nothing works.
How I can get the {1,2,3,4,5} without having to type it out (so that I can expand this to a larger list)??
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Aug 26, 2009
I am trying to filter an array (the longer one) using the shorter array as the criteria. I am currently doing this using the following method
IF(LOOKUP(lookup cell, array)=lookupcell, lookupcell, "FALSE")
I then copy and paste 'values' and filter out the 'false' to get my final result.
This has worked in the past, but for some reason that I simply can't figure out, the formula isnt working! I've attached the example, and I've highlighted a number in blue (cell E522 and C103), (that should be being found in the 'LOOKUP' function) but is returning a "FALSE". I have looked over the code and simply can't figure out why Excel isn't returning the right value.
This is obviously happening for a quite a few of my numbers, as my filter result is returning an array that is about 1500 shorter than it should be. I have highlighted E522 as the 'example cell' to look at.
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Jun 21, 2014
wondering is there a VBA equivalent of --() in excel that turns trues and falses to 1's and 0's?
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Nov 6, 2013
Is there anyway to recreate this formula w/o it being an array ?
{=IF(C3="","",IFERROR(INDEX('Master List'!$B$1:$B$2000,MATCH(TRUE,ISNUMBER(SEARCH('Master List'!$A$1:$A$2000,C3)),0)),"ADD TO MASTER"))}
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Nov 15, 2007
=CORREL(C1:C10,C12:C21) at H1
=CORREL(C1:C10,C23:C32) at H2
=CORREL(C1:C10,C34:C43) at H3
etc
can i have a macro that first array remain the same, and second array always 11 cells added. drag it down also can
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Mar 22, 2007
I've tried to multiply each element in a 6x6 array by a similar 6x6 array, both on the same sheet, and it worked.(see Macro2 and attached xls file "Test").Then I got more ambitious and tried to do the multiplication from a standard array in sheet "TestA", with the result on the same sheet, by each array in sheet "TestB" and failed.How do I solve this problem? Pgualb PS:I'm using the R1C1 style.
Sub Macro2()
For y = 29 To 34
For x = 2 To 7
Cells(x, y) = Cells(x, y - 27) * Cells(x, y - 18)
Next x
Next y
End Sub
Sub Teste12()
'Multiplica matriz em TestB por matriz padrão em TestA com _
'resultado na matriz em TestA correspondente à matriz em TestB
'
Dim x, y As Integer
For y = 2 To 7.............
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Aug 15, 2014
Assume that I have in Sheet2 a list of CUSTOMIZED name.
[Code].....
Now in Sheet1, I have data in column A that has strings consist of the customized name.
For example
[Code] .....
What function should I use that could give me the result of the CUSTOMIZED name?
I was thinking of a formula i.e.
[Code] ......
Obviously, the above formula give me error. Even if it works, it'll not give me the customized name ...
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Nov 28, 2011
I'm new to arrays. They seem promising for what I want to do though...
Heres where I'm at. I have some data like this:
items freq 1 0.5 2 0.5 3 0.5 4 0.25 5 0.25 6 0.125
Now, I've created a 2 dimensional array, as such:
Code:
Sub testarray()
Dim arr1 As Variant
Dim rng1 As Range
Dim lngX As Long
Set rng1 = [A2:A6]
ReDim arr1(1 To rng1.Count, 1 To 2)
For lngX = 1 To rng1.Count
arr1(lngX, 1) = rng1.Cells(lngX, 1)
arr1(lngX, 2) = rng1.Cells(lngX, 2)
Next
End Sub
Now, what I need to do, is create an array for each freq of all the items that share that freq. Essentially I need this:
0.5 {1,2,3} 0.25 {4,5} 0.125 {6}
Now, I was thinking, if I could create a dictionary object and make the key the freq (so my keys would be 0.5,0.25,0.125) then I could assing the "item" an array (or another dictionary) holding the items that apply to that freq.
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May 18, 2007
I just wanted to concatenate a few cells using an array formula like this:
{=SUM(IF(B2:J2="";0;B2:J2))}
Well, this does not work. I have no idea why it fails. Any solution to this without scripting?
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Jun 30, 2006
i need to replicate what i did using array formulas with VBA macro (array variable). to make things clear and simple i created an example for illustration only. look at it & u will find what i did & what i need to do ,much of it
in writing so that i accurately describe my problem. attached is my example
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Jul 11, 2007
On one sheet (KPI) I have either the values "x" or "" in the range A84:A89 to mark wheter to use the corresponding project in the range B84:B89. On the sheet X-ref I have the same project names in range T4:Y4 and a corresponding target value in T8:Y8
What I want is the sum (or average) of the marked-projects target-values. The result should end up in KPI!G31.
In other words I want
=sumif(A84:A89;"x";'X-ref'!T4:Y4)
but it doesn't work since the first range is an column-array and the second range is an row-array.
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