I would like to split a string like this in Access 2000 (Visual Basic function):
"[Results]
[Comments]"
in two parts:
the results part
the comments part
As you can notice, these two parts are separated by an empty line (always, this is our separator).
[Results] and [Comments] are blocks of text. We don't care what's in it except:
the results part doesn't have any empty lines in it, so the first empty line we see is the separator one.
I want my function to extract the Comments part only.
Here is what i tried:
Public Function ExtractComm(txt As String) As String
Dim emptyLine As Integer
txt = Trim(txt)
'emptyLine = first empty line index ??
emptyLine = InStrRev(txt, (Chr(13) + Chr(10)) & (Chr(13) + Chr(10)))
'Comments part = all that is after the empty line ??
ExtractComm = Mid(txt, emptyLine + 4)
End Function
But it doesn't work well.
If I do:
ExtractComm(
"Res1
Res2
Comment1
Comment2"
)
I want to obtain:
"Comment1
Comment2"
but I only obtain Comment2. Any idea to extract the comment part ?
Thanks a lot !
Maybe you need to use InStr instead of InStrRev
InStrRev
Returns the position of the first occurrence of one string within another, starting from the right side of the string.
InStr
Returns an integer specifying the start position of the first occurrence of one string within another.
Related
In MS Access I have a table with a Short Text field named txtPMTaskDesc in which some records contains numbers, and if they do, at different positions in the string. I would like to recover these numbers from the text string if possible for sorting purposes.
There are over 26000 records in the table, so I would rather handle it in a query over using VBA loops etc.
Sample Data
While the end goal is to recover the whole number, I was going to start with just identifying the position of the first numerical value in the string. I have tried a few things to no avail like:
InStr(1,[txtPMTaskDesc],"*[0-9]*")
Once I get that, I was going to use it as a part of a Mid() function to pull out it and the character next to it like below. (its a bit dodgy, but there is never more than a two-digit number in the text string)
IIf(InStr(1,[txtPMTaskDesc],"*[0-9]*")>0,Mid([txtPMTaskDesc],InStr(1,[txtPMTaskDesc],"*[0-9]*"),2)*1,0)
Any assistance appreciated.
If data is truly representative and number always preceded by "- No ", then expression in query can be like:
Val(Mid(txtPMTaskDesc, InStr(txtPMTaskDesc, "- No ") + 5))
If there is no match, a 0 will return, however, if field is null, the expression will error.
If string does not have consistent pattern (numbers always in same position or preceded by some distinct character combination that can be used to locate position), don't think can get what you want without VBA. Either loop through string or explore Regular Expressions aka RegEx. Set reference to Microsoft VBScript Regular Expressions x.x library.
Function GetNum(strS AS String)
Dim re As RegExp, Match As Object
Set re = New RegExp
re.Pattern = "[\d+]+"
Set Match = re.Execute(strS)
GetNum = Null
If Match.Count > 0 Then GetNum = Match(0)
End Function
Input of string "Fuel Injector - No 1 - R&I" returns 1.
Place function in a general module and call it from query.
SELECT table.*, GetNum(Nz(txtPMTaskDesc,"")) AS Num FROM table;
Function returns Null if there is no number match.
Well, does the number you want ALWAYS have a - No xxxx - format?
If yes, then you could have this global function in VBA like this:
Public Function GNUM(v As Variant) As Long
If IsNull(v) Then
GNUM = 0
Exit Function
End If
Dim vBuf As Variant
vBuf = Split(v, " - No ")
Dim strRes As String
If UBound(vBuf) > 0 Then
strRes = Split(vBuf(1), "-")(0)
GNUM = Trim(strRes)
Else
GNUM = 0
End If
End Function
Then your sql will be like this:
SELECT BLA, BLA, txtPMTaskDesc, GNUM([txtPMTaskDesc] AS TaskNum
FROM myTable
So you can create/have a public VBA function, and it can be used in the sql query.
It just a question if " - No -" is ALWAYS that format, then THEN the number follows this
So we have "space" "-" "space" "No" "space" "-" -- then the number and the " -"
How well this will work depends on how consistent this text is.
I have a field in SQL Server that contains an comma separated list. Here are 2 examples:
select 'ex1,ex2,ex3' as str union all
select 'ax1,ax2'
In my report, I have to transform all of these values (5 in this case) using a function. In this question I will use Trim, but in actuality we are using another custom made function with the same scope.
I know how I can split every value from the string and recombine them:
=Join(Split(Fields!str.Value,","),", ")
This works great. However, I need to execute a function before I recombine the values. I thought that this would work:
=Join( Trim(Split(Fields!VRN.Value,",")) ,", ")
However, this just gives me an error:
Value of type '1-dimensional array of String' cannot be converted to 'String'. (rsCompilerErrorInExpression)
I can't personally change the function that we use.
How do I use an extra function when dealing with both an split and a join?
You can use custom code to include all the logic (Split->Custom Code->Join).
Make adjustments inside the loop to call your custom function instead of trim
Public Function fixString (ByVal s As String) As String
Dim mystring() As String
mystring = s.Split(",")
For index As Integer = 0 To mystring.Length-1
mystring(index) = Trim(mystring(index))
Next
Return Join(mystring, ",")
End Function
To call the custom code use the following expression
Code.fixString( Fields!VRN.Value )
Hi good day I'm very new to powerbuilder and I'm using PB 11.5
Can someone know how to import comma delimited text file into datawindow.
Example Text file
"1234","20141011","Juan, Delacruz","Usa","001992345456"...
"12345","20141011","Arc, Ino","Newyork","005765753256"...
How can I import the third column which is the full name and the last column which is the account number. I want to transfer the name and account number into my external data window. I've tried to use the ImportString(all the rows are being transferred in one column only). I have three fields in my external data window.the Name and Account number.
Here's the code
ls_File = dw_2.Object.file_name[1]
li_FileHandle = FileOpen(ls_File)
li_FileRead = FileRead(li_FileHandle, ls_Text)
DO WHILE li_FileRead > 0
li_Count ++
li_FileRead = FileRead(li_FileHandle, ls_Text)
ll_row = dw_1.ImportString(ls_Text,1)
Loop.
Please help me with the code! Thank You
It seems that PB expects by default a tab-separated csv file (while the 'c' from 'csv' stands for 'coma'...).
Add the csv! enumerated value in the arguments of ImportString() and it should fix the point (it does in my test box).
Also, the columns defined in your dataobject must match the columns in the csv file (at least for the the first columns your are interested in). If there are mode columns in the csv file, they will be ignored. But if you want to get the 1st (or 2nd) and 3rd columns, you need to define the first 3 columns. You can always hide the #1 or #2 if you do not need it.
BTW, your code has some issues :
you should always test the return values of function calls like FileOpen() for stopping processing in case of non-existent / non-readable file
You are reading the text file twice for the first row: once before the while and another inside of the loop. Or maybe it is intended to ignore a first line with column headers ?
FWIF, here is a working code based on yours:
string ls_file = "c:\dev\powerbuilder\experiment\data.csv"
string ls_text
int li_FileHandle, li_fileread, li_count
long ll_row
li_FileHandle = FileOpen(ls_File)
if li_FileHandle < 1 then
return
end if
li_FileRead = FileRead(li_FileHandle, ls_Text)
DO WHILE li_FileRead > 0
li_Count ++
ll_row = dw_1.ImportString(csv!,ls_Text,1)
li_FileRead = FileRead(li_FileHandle, ls_Text)//read next line
Loop
fileclose(li_fileHandle)
use datawindow_name.importfile(CSV!,file_path) method.
After applying the unpivot procedure, I have an Amount column that has blanks and other characters ( like "-"). I would like to convert those non-numberic values to zero. I use replace procedure but it only converts one at the time.
Also, I tried to use the following script
/**
Public Overrides Sub Input()_ProcessInputRows(ByVal Row As Input()Buffer)
If Row.ColumnName_IsNull = False Or Row.ColumnName = "" Then
Dim pattern As String = String.Empty
Dim r As Regex = Nothing
pattern = "[^0-9]"
r = New Regex(pattern, RegexOptions.Compiled)
Row.ColumnName = Regex.Replace(Row.ColumnName, pattern, "")
End If
End Sub
**/
but i'm getting error.I don't much about script so maybe I placed in the wrong place. The bottom line is that I need to convert those non-numberic values.
Thank you in advance for your help.
I generally look at regular expressions as a great way to introduce another problem into an existing one.
What I did to simulate your problem was to write a select statement that added 5 rows. 2 with valid numbers, the rest were an empty string, string with spaces and one with a hyphen.
I then wired it up to a Script Component and set the column as read/write
The script I used is as follows. I verified there was a value there and if so, I attempted to convert the value to an integer. If that failed, then I assigned it zero. VB is not my strong suit so if this could have been done more elegantly, please edit my script.
Public Overrides Sub Input0_ProcessInputRow(ByVal Row As Input0Buffer)
' Ensure we have data to work with
If Not Row.ColumnName_IsNull Then
' Test whether it's a number or not
' TryCast doesn't work with value types so I'm going the lazy route
Try
' Cast to an integer and then back to string because
' my vb is weak
Row.ColumnName = CStr(CType(Row.ColumnName, Integer))
Catch ex As Exception
Row.ColumnName = 0
End Try
End If
End Sub
I need to remove hyphens from a string in a large number of access fields. What's the best way to go about doing this?
Currently, the entries are follow this general format:
2010-54-1
2010-56-1
etc.
I'm trying to run append queries off of this field, but I'm always getting validation errors causing the query to fail. I think the cause of this failure is the hypens in the entries, which is why I need to remove them.
I've googled, and I see that there are a number of formatting guides using vbscript, but I'm not sure how I can integrate vb into Access. It's new to me :)
Thanks in advance,
Jacques
EDIT:
So, Ive run a test case with some values that are simply text. They don't work either, the issue isn't the hyphens.
I'm not sure that the hyphens are actually the problem without seeing sample data / query but if all you need to do is get rid of them, the Replace function should be sufficient (you can use this in the query)
example: http://www.techonthenet.com/access/functions/string/replace.php
If you need to do some more advanced string manipulation than this (or multiple calls to replace) you might want to create a VBA function you can call from your query, like this:
http://www.pcreview.co.uk/forums/thread-2596934.php
To do this you'd just need to add a module to your access project, and add the function there to be able to use it in your query.
I have a function I use when removing everything except Alphanumeric characters. Simply create a query and use the function in the query on whatever field you are trying to modify. Runs much faster than find and replace.
Public Function AlphaNumeric(inputStr As String)
Dim ascVal As Integer, originalStr As String, newStr As String, counter As Integer, trimStr As String
On Error GoTo Err_Stuff
' send to error message handler
If inputStr = "" Then Exit Function
' if nothing there quit
trimStr = Trim(inputStr)
' trim out spaces
newStr = ""
' initiate string to return
For counter = 1 To Len(trimStr)
' iterate over length of string
ascVal = Asc(Mid$(trimStr, counter, 1))
' find ascii vale of string
Select Case ascVal
Case 48 To 57, 65 To 90, 97 To 122
' if value in case then acceptable to keep
newStr = newStr & Chr(ascVal)
' add new value to existing new string
End Select
Next counter
' move to next character
AlphaNumeric = newStr
' return new completed string
Exit Function
Err_Stuff:
' handler for errors
MsgBox Err.Number & " " & Err.Description
End Function
Just noticed the link to the code, looks similar to mine. Guess this is just another option.