Dear All
Does anyone have a regular expression to parse a comma delimited line with
some fields optionally having string delimiters (text qualifiers)
I am currently testing with this regular expression and it works in almost
all my test cases. I found this on the internet in a C# solution.
,(?=([^\"]*"[^"]*")*(?![^"]*"))
However in some of my test cases it fails and I am having difficulty
interpreting it.
The VB.NET function I used is
Public Function parseCSVLine(By Val sInputString As String) As ArrayList
Dim r As New Regex(",(?=([^\" & Chr(34) & "]*" & Chr(34) & "[^" &
Chr(34) & "]*" & Chr(34) & ")*(?![^" & Chr(34) & "]*" & Chr(34) & "))")
Dim iStart As Integer, m As Match
Dim oArrayList As New ArrayList()
For Each m In r.Matches(sInpu tString)
oArrayList.Add( sInputString.Su bstring(iStart, m.Index - iStart))
iStart = m.Index + 1
Next
oArrayList.Add( sInputString.Su bstring(iStart, sInputString.Le ngth -
iStart))
Return oArrayList
End Function
My test cases are as follows:
#
CSV
Value 1
Value 2
Value 3
Value 4
Results
1
a,b,c
a
b
c
P
2
"a",b,c
a
b
c
P
3
'a',b,c
'a'
b
c
P
4
a , b , c
a
b
c
P
5
aa,bb;cc
aa
bb;cc
P
6
P
7
a
a
P
8
,b,
b
P
9
,,c
c
P
10
,,
P
11
"",b
b
P
12
" ",b
[SPACE]
b
P
13
"a,b"
a,b
P
14
"a,b",c
a,b
c
P
15
" a , b ", c
a , b
c
P
16
a b,c
a b
c
P
17
a"b,c
a"b
C
P
18
"a""b",c
a"b
c
P
19
a""b,c
a""b
c
P
20
a,b",c
a
b"
c
O
21
a,b"",c
a
b""
c
P
22
a,"B: ""Hi, I'm B""",c
a
B: "Hi, I'm B"
c
P
23
a,"b,c
a
"b
c
O
24
a,bc"d,e
a
bc"d
e
O
25
a,bc"d",e
a
bc"d"
e
O
26
a,"bc"d,e
a
"bc"d
e
O
Many thanks,
Wazir
18  12333 
Apologies for the formatting of test cases, I didnt realise I was posting in
Plain Text.
Here they are again, I hope it is more readable this time.
Some of them like case 20 doesnt work with the regular expression
# CSV Value 1 Value 2 Value 3 Value 4
1 a,b,c a b c
2 "a",b,c a b c
3 'a',b,c 'a' b c
4 a , b , c a b c
5 aa,bb;cc aa bb;cc
6
7 a a
8 ,b, b
9 ,,c c
10 ,,
11 "",b b
12 " ",b [SPACE] b
13 "a,b" a,b
14 "a,b",c a,b c
15 " a , b ", c a , b c
16 a b,c a b c
17 a"b,c a"b c
18 "a""b",c a"b c
19 a""b,c a""b c
20 a,b",c a b" c
21 a,b"",c a b"" c
22 a,"B: ""Hi, I'm B""",c a B: "Hi, I'm B"
c
23 a,"b,c a "b c
24 a,bc"d,e a bc"d e
25 a,bc"d",e a bc"d" e
26 a,"bc"d,e a "bc"d e
Apologies for the formatting of test cases, I didnt realise I was posting in
Plain Text.
Here they are again, I hope it is more readable this time.
Some of them like case 20 doesnt work with the regular expression
# CSV Value 1 Value 2 Value 3 Value 4
1 a,b,c a b c
2 "a",b,c a b c
3 'a',b,c 'a' b c
4 a , b , c a b c
5 aa,bb;cc aa bb;cc
6
7 a a
8 ,b, b
9 ,,c c
10 ,,
11 "",b b
12 " ",b [SPACE] b
13 "a,b" a,b
14 "a,b",c a,b c
15 " a , b ", c a , b c
16 a b,c a b c
17 a"b,c a"b c
18 "a""b",c a"b c
19 a""b,c a""b c
20 a,b",c a b" c
21 a,b"",c a b"" c
22 a,"B: ""Hi, I'm B""",c a B: "Hi, I'm B"
c
23 a,"b,c a "b c
24 a,bc"d,e a bc"d e
25 a,bc"d",e a bc"d" e
26 a,"bc"d,e a "bc"d e
You can use the OleDbCommand class to read a csv file
Tu-Thac www.ongtech.co
----- MW wrote: ----
Dear Al
Does anyone have a regular expression to parse a comma delimited line wit
some fields optionally having string delimiters (text qualifiers
I am currently testing with this regular expression and it works in almos
all my test cases. I found this on the internet in a C# solution
,(?=([^\"]*"[^"]*")*(?![^"]*")
However in some of my test cases it fails and I am having difficult
interpreting it
The VB.NET function I used i
Public Function parseCSVLine(By Val sInputString As String) As ArrayLis
Dim r As New Regex(",(?=([^\" & Chr(34) & "]*" & Chr(34) & "[^"
Chr(34) & "]*" & Chr(34) & ")*(?![^" & Chr(34) & "]*" & Chr(34) & "))"
Dim iStart As Integer, m As Matc
Dim oArrayList As New ArrayList(
For Each m In r.Matches(sInpu tString
oArrayList.Add( sInputString.Su bstring(iStart, m.Index - iStart)
iStart = m.Index +
Nex
oArrayList.Add( sInputString.Su bstring(iStart, sInputString.Le ngth
iStart)
Return oArrayLis
End Functio
My test cases are as follows
CS
Value
Value
Value
Value
Result
a,b,
"a",b,
'a',b,
'a
a , b ,
aa,bb;c
a
bb;c
,b
,,
1
,
1
"",
1
" ",
[SPACE
1
"a,b
a,
1
"a,b",
a,
1
" a , b ",
a ,
1
a b,
a
1
a"b,
a"
1
"a""b",
a"
1
a""b,
a""
2
a,b",
b
2
a,b"",
b"
2
a,"B: ""Hi, I'm B""",
B: "Hi, I'm B
2
a,"b,
"
2
a,bc"d,
bc"
2
a,bc"d",
bc"d
2
a,"bc"d,
"bc"
Many thanks
Wazi
You can use the OleDbCommand class to read a csv file
Tu-Thac www.ongtech.co
----- MW wrote: ----
Dear Al
Does anyone have a regular expression to parse a comma delimited line wit
some fields optionally having string delimiters (text qualifiers
I am currently testing with this regular expression and it works in almos
all my test cases. I found this on the internet in a C# solution
,(?=([^\"]*"[^"]*")*(?![^"]*")
However in some of my test cases it fails and I am having difficult
interpreting it
The VB.NET function I used i
Public Function parseCSVLine(By Val sInputString As String) As ArrayLis
Dim r As New Regex(",(?=([^\" & Chr(34) & "]*" & Chr(34) & "[^"
Chr(34) & "]*" & Chr(34) & ")*(?![^" & Chr(34) & "]*" & Chr(34) & "))"
Dim iStart As Integer, m As Matc
Dim oArrayList As New ArrayList(
For Each m In r.Matches(sInpu tString
oArrayList.Add( sInputString.Su bstring(iStart, m.Index - iStart)
iStart = m.Index +
Nex
oArrayList.Add( sInputString.Su bstring(iStart, sInputString.Le ngth
iStart)
Return oArrayLis
End Functio
My test cases are as follows
CS
Value
Value
Value
Value
Result
a,b,
"a",b,
'a',b,
'a
a , b ,
aa,bb;c
a
bb;c
,b
,,
1
,
1
"",
1
" ",
[SPACE
1
"a,b
a,
1
"a,b",
a,
1
" a , b ",
a ,
1
a b,
a
1
a"b,
a"
1
"a""b",
a"
1
a""b,
a""
2
a,b",
b
2
a,b"",
b"
2
a,"B: ""Hi, I'm B""",
B: "Hi, I'm B
2
a,"b,
"
2
a,bc"d,
bc"
2
a,bc"d",
bc"d
2
a,"bc"d,
"bc"
Many thanks
Wazi
In article <#h************ *@tk2msftngp13. phx.gbl>, MW wrote: Dear All
Does anyone have a regular expression to parse a comma delimited line with
some fields optionally having string delimiters (text qualifiers)
I just replied to a similar post.
String object has Split call:
"a,b,c,de,fg,he gk".Split(',' )
In article <#h************ *@tk2msftngp13. phx.gbl>, MW wrote: Dear All
Does anyone have a regular expression to parse a comma delimited line with
some fields optionally having string delimiters (text qualifiers)
I just replied to a similar post.
String object has Split call:
"a,b,c,de,fg,he gk".Split(',' )
>> Does anyone have a regular expression to parse a comma delimited line with some fields optionally having string delimiters (text qualifiers)
I just replied to a similar post.
String object has Split call:
"a,b,c,de,fg,he gk".Split(',' )
This is a problem that is known for a long time to the Perl programmers.
It cannot be solved with regular expressions only.
The simple string above is works, but what about the next one, also valid
CSV:
Item 1,"string with comma, not to split",1234,"no w, does it work?",done
This should be split into
Item 1
string with comma, not to split
1234
now, does it work?
done
--
Mihai
-------------------------
Replace _year_ with _ to get the real email
>> Does anyone have a regular expression to parse a comma delimited line with some fields optionally having string delimiters (text qualifiers)
I just replied to a similar post.
String object has Split call:
"a,b,c,de,fg,he gk".Split(',' )
This is a problem that is known for a long time to the Perl programmers.
It cannot be solved with regular expressions only.
The simple string above is works, but what about the next one, also valid
CSV:
Item 1,"string with comma, not to split",1234,"no w, does it work?",done
This should be split into
Item 1
string with comma, not to split
1234
now, does it work?
done
--
Mihai
-------------------------
Replace _year_ with _ to get the real email
Sergei,
Split will only work for a comma delimited file and will not work with text
qualifiers (string delimiters)
"Sergei Gnezdov" <no****@blackho le.net> wrote in message
news:sl******** ***********@STA 01052.itron.com ... In article <#h************ *@tk2msftngp13. phx.gbl>, MW wrote: Dear All
Does anyone have a regular expression to parse a comma delimited line
with some fields optionally having string delimiters (text qualifiers)
I just replied to a similar post.
String object has Split call:
"a,b,c,de,fg,he gk".Split(',' ) This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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Dear All
Does anyone have a regular expression to parse a comma delimited line with
some fields optionally having string delimiters (text qualifiers)
I am currently testing with this regular expression and it works in almost
all my test cases. I found this on the internet in a C# solution.
,(?=(*"*")*(?!*"))
However in some of my test cases it fails and I am having difficulty
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