Using RegEx in vb.net - regex

Here is what I need to do (for clarity)
Take a PDF file (link on the bottom)
Then parse only the information under each header into a DataFridView.
I couldn't think of a way to do this (seeing as there is no native way to handle PDFs)
So my only thought was to convert it to a txt document then (somehow) take the txt from the text document and put it into the datagridview.
So, using Itextsharp I first convert the PDF to a text file; Which keeps "most" of its formatting (see link below)
This is the source for that
Dim mPDF As String = "C:\Users\Innovators World Wid\Documents\test.pdf"
Dim mTXT As String = "C:\Users\Innovators World Wid\Documents\test.txt"
Dim mPDFreader As New iTextSharp.text.pdf.PdfReader(mPDF)
Dim mPageCount As Integer = mPDFreader.NumberOfPages()
Dim parser As PdfReaderContentParser = New PdfReaderContentParser(mPDFreader)
'Create the text file.
Dim fs As FileStream = File.Create(mTXT)
Dim strategy As iTextSharp.text.pdf.parser.SimpleTextExtractionStrategy
For i As Integer = 1 To mPageCount
strategy = parser.ProcessContent(i, New iTextSharp.text.pdf.parser.SimpleTextExtractionStrategy())
Dim info As Byte() = New UTF8Encoding(True).GetBytes(strategy.GetResultantText())
fs.Write(info, 0, info.Length)
Next
fs.Close()
however I only need the "lines" of information. So everything should look like this
63 FMPC0847535411 OD119523523152105000 Aug 28, 2020 02:18 PM EXPRESS
64 FMPP0532201112 OD119523544975573000 Aug 28, 2020 02:18 PM EXPRESS
65 FMPP0532243104 OD119523557412412000 Aug 28, 2020 02:18 PM EXPRESS
66 FMPC0847516962 OD119523576945605000 Aug 28, 2020 02:18 PM EXPRESS
67 FMPC0847520947 OD119523760191783000 Aug 28, 2020 02:19 PM EXPRESS
In order to do that now I needed to use RegEx to remove everything I didn't want
here is the RegEx I Used
The RegEx is
(\d{2}\s.{14}\s.{20}\s.{3}\s\d{1,2},\s\d{4}\s\d{2}:\d{2}\s.{2}\sEXPRESS,*\s*R*e*p*l*a*c*e*m*e*n*t*\s*o*r*d*e*r*)";
Here is the code I used.
Private Sub Fixtext()
Dim regex As Regex = New Regex("\d{2}\s.{14}\s.{20}\s.{3}\s\d{1,2},\s\d{4}\s\d{2}:\d{2}\s.{2}\sEXPRESS,*\s*R*e*p*l*a*c*e*m*e*n*t*\s*o*r*d*e*r*")
Using reader As StreamReader = New StreamReader("C:\Users\Innovators World Wid\Documents\test.txt")
While (True)
Dim line As String = reader.ReadLine()
If line = Nothing Then
Return
End If
Dim match As Match = regex.Match(line)
If match.Success Then
Dim value As String = match.Groups(1).Value
Console.WriteLine(line)
End If
End While
End Using
End Sub
The results are "close" but not exactly the way I need it. In some cases they are "crammed" together and there are still parts left behind. An example would be
90 FMPC0847531898 OD119522758218348000 Aug 28, 2020 03:20 PM EXPRESS
491 FMPP0532220915 OD119522825195489000 Aug 28, 2020 03:21 PM EXPRESS
Tracking Id Forms Required Order Id RTS done on Notes492 FMPP0532194482 OD119522868525176000 Aug 28, 2020 03:21 PM EXPRESS
493 FMPP0532195684 OD119522871090000000 Aug 28, 2020 03:21 PM EXPRESS494 FMPP0532224318 OD119522895172342000 Aug 28, 2020 03:21 PM EXPRESS
the format I actually need is (again) a format I can use to import the data later into a datagridview
so for each line it needs to be
[number][ID][ID2][Date][Notes]
[number][ID][ID2][Date][Notes]
[number][ID][ID2][Date][Notes]
[number][ID][ID2][Date][Notes]
using this "Concept" This is an example of what I need (though i know this doesn't work, but something along these lines that will work)
Dim regex As Regex = New Regex("\d{2}\s.{14}\s.{20}\s.{3}\s\d{1,2},\s\d{4}\s\d{2}:\d{2}\s.{2}\sEXPRESS,*\s*R*e*p*l*a*c*e*m*e*n*t*\s*o*r*d*e*r*")
Using reader As StreamReader = New StreamReader("C:\Users\Innovators World Wid\Documents\test.txt")
While (True)
Dim line As String = reader.ReadLine()
If line = Nothing Then
Return
End If
Dim match As Match = regex.Match(line)
If match.Success Then
Dim value As String = match.Groups(1).Value
Dim s As String = value
s = s.Replace(" Tracking Id Forms Required Order Id RTS done on Notes", Nothing)
s = s.Replace("EXPRESS ", "EXPRESS")
s = s.Replace("EXPRESS", "EXPRESS" & vbCrLf)
Console.WriteLine(line)
End If
End While
End Using
Here is a "brief" explanation with files included.
Copy of the original PDF (This is the PDF being converted to .txt using itext)
I am only doing this because I can't think of a way (outside of paying for a 3rd party tool to convert a pdf to XLS)
https://drive.google.com/file/d/1iHMM_G4UBUlKaa44-Wb00F_9ZdG-vYpM/view?usp=sharing
using the above "itext method" I mentioned this is the outputted converted file
https://drive.google.com/file/d/10dgJDFW5XlhsB0_0QAWQvtimsDoMllx-/view?usp=sharing
I then use the above Regex (mentioned above) to parse out what I don't need.
however it isn't working.
So my Questions are (for "clarity")
Is this the only or best method to do what I need done? (Convert PDF to text, Remove what I don't need then input that information into a DataGridView; Or is there another , Cleaner , Better method?
(if not 1) How can I make this work? Is something wrong with my RegEx or My Logic? Am I missing something better/cleaner that someone can help me see.
(if 2 ^ Not 1) What is the best way to take the results and place them in the proper DataGridView Column.
Final Statement: It doesn't have to be this method. I will take "ANY" method that will allow me to do what I need to be done, the cleaner the better however I have to do this avoiding 3rd party libraries that are free with limitations; Paid 3rd party libraries. That leaves me with limitations. IE: PDFBox, itext,itextsharp) And this has to be able to lead me from a PDF (like the above sample) to that table information in a Datagridview or even a listview.
I will take any help and I am more then appreciative. Also I did re-Ask this question because a mod closed my original question "Stating it wasn't clear what I needed" I did try in both cases to make the question as "thorough" as possible but I do hope this is "Clearer" so it doesn't get closed abruptly.

I cheated a bit by correcting the text file. It goes a little wonky at page breaks and misses starting a new line. Perhaps you can correct that with Itextsharp or the hard to maintain regex.
I made a class to hold the data. The property names become the column headers in the DataGridView.
I read all the lines in the text file into an array. I checked the first character of the line to see if it was a digit then split the line into another array based on the space. Next I created a new Tracking object, fleshing it out with all its properties with the parameterized constructor.
Finally, I checked it the line contained a comma and added that bit of text to the notes parameter. The completed object is added to the list.
After the loop the lst is bound to the grid.
Public Class Tracking
Public Property Number As Integer
Public Property ID As String
Public Property ID2 As String
Public Property TrackDate As Date
Public Property Notes As String
Public Sub New(TNumber As Integer, TID As String, TID2 As String, TDate As DateTime, TNotes As String)
Number = TNumber
ID = TID
ID2 = TID2
TrackDate = TDate
Notes = TNotes
End Sub
End Class
Private Sub OPCode()
Dim lst As New List(Of Tracking)
Dim lines = File.ReadAllLines("C:\Users\maryo\Desktop\test.txt")
For Each line In lines
If Char.IsDigit(line(0)) Then
Dim parts = line.Split(" "c)
Dim T As New Tracking(CInt(parts(0)), parts(1), parts(2), Date.ParseExact($"{parts(3)} {parts(4)} {parts(5)} {parts(6)} {parts(7)}", "MMM d, yyyy hh:mm tt", CultureInfo.CurrentCulture), parts(8))
If line.Contains(",") Then
T.Notes &= line.Substring(line.IndexOf(","))
End If
lst.Add(T)
End If
Next
DataGridView1.DataSource = lst
End Sub
EDIT
To pinpoint the error let's try...
Private Sub OPCode()
Dim lst As New List(Of Tracking)
Dim lines = File.ReadAllLines("C:\Users\maryo\Desktop\test.txt")
For Each line In lines
If Char.IsDigit(line(0)) Then
Dim parts = line.Split(" "c)
If parts.Length < 9 Then
Debug.Print(line)
MessageBox.Show($"We have a line that does not include all fields.")
Exit Sub
End If
Dim T As New Tracking(CInt(parts(0)), parts(1), parts(2), Date.ParseExact($"{parts(3)} {parts(4)} {parts(5)} {parts(6)} {parts(7)}", "MMM d, yyyy hh:mm tt", CultureInfo.CurrentCulture), parts(8))
If line.Contains(",") Then
T.Notes &= line.Substring(line.IndexOf(","))
End If
lst.Add(T)
End If
Next
DataGridView1.DataSource = lst
End Sub

Try this regex and see if this works according to your requirement:
\b[0-9].*(FMPC|OD).*(EXPRESS|Replacement\sOrder)\b

Related

Extract Date and Time in ABAP via Regex

I wanted to separate the time and date from this string using REGEX because I feel like it is the only way I can separate it. But I am not really familiar on how to do it maybe someone can help me out here.
The original string: Your item was delivered in or at the mailbox at 3:34 pm on September 1, 2016 in TEXAS, MT 59102
The output i want to achieve/populate:
lv_time = 3:34 pm
lv_date = September 1, 2016
Here's the code I was trying to do but I am only able to cut it like this:
lv_status = Your item was delivered in or at the mailbox at
lv_time = 3
lv_date = :34 pm on September 1, 2016 in TEXAS, MT 59102.
Here's the code I have so far:
DATA: lv_status TYPE string,
lv_time TYPE string,
lv_date TYPE string,
lv_off TYPE i.
lv_status = 'Your item was delivered in or at the mailbox at 3:34 pm on September 1, 2016 in TEXAS, MT 59102.'.
FIND REGEX '(\d+)\s*(.*)' IN lv_status SUBMATCHES lv_time lv_date MATCH OFFSET lv_off.
lv_status = lv_status(lv_off).
You asked for it, here it comes:
\b((1[0-2]|0?[1-9]):([0-5][0-9]) ([AaPp][Mm])) on (January|February|March|April|May|June|July|August|September|October|November|December)\D?(\d{1,2}\D?)?\D?((?:19[7-9]\d|20\d{2})|\d{2})
This accepts time in HH:MM am/pm format, and dates in Jan-Dec, dd 1970-2999.
Each part is captured in its own group.
The demo shows a version that allows abbreviated month names:
Demo

Excel data import in specific cell

I would like to list up devices and put their prices next to them.
My goal is to check different sites every week and notice trends.
This is a hobby project, I know there are sites that already do this.
For instance:
Device | URL Site 1 | Site 1 | URL Site 2 | Site 2
Device a | http://... | €40,00 | http://... | €45,00
Device b | http://... | €28,00 | http://... | €30,50
Manually, this is a lot of work (checking every week), so I thought a Macro in Excel would help. The thing is, I would like to put the data in a single cell and excel only recognises tables. Solution: view source code, read price, export price to specific cell.
I think this is all possible within Excel, but I can't quiet figure out how to read the price or other given data and how to put it in one specific cell. Can I specify coordinates in the source code, or is there a more effective way of thinking?
First of all you have to find out how does the website works. For the page you asked I have done the following:
Opened http://www.mediamarkt.de page in Chrome.
Typed BOSCH WTW 85230 in the search box, suggestion list appeared.
Pressed F12 to open developer tools and clicked Network tab.
Each time I was typing, the new request appeared (see yellow areas):
Clicked the request to examine general info:
You can see that it uses GET method and some parameters including url-encoded product name.
Clicked the Response tab to examine the data returning from the server:
You can see it is a regular JSON, full content is as follows:
{"suggestions":[{"attributes":{"energyefficiencyclass":"A++","modelnumber":"2004975","availabilityindicator":"10","customerrating":"0.00000","ImageUrl":"http://pics.redblue.de/artikelid/DE/2004975/CHECK","collection":"shop","id":"MediaDEdece2358813","currentprice":"444.00","availabilitytext":"Lieferung in 11-12 Werktagen"},"hitCount":0,"image":"http://pics.redblue.de/artikelid/DE/2004975/CHECK","name":"BOSCH WTW 85230 Kondensationstrockner mit Warmepumpentechnologie (8 kg, A++)","priority":9775,"searchParams":"/Search.ff?query=BOSCH+WTW+85230+Kondensationstrockner+mit+W%C3%A4rmepumpentechnologie+%288+kg%2C+A+%2B+%2B+%29\u0026channel=mmdede","type":"productName"}]}
Here you can find "currentprice":"444.00" property with the price.
Simplified the request by throwing out some optional parameters, it turned out that the same JSON response can be received by the URL http://www.mediamarkt.de/FACT-Finder/Suggest.ff?channel=mmdede&query=BOSCH+WTW+85230
That data was enough to built some code, assuming that first column intended for products:
Option Explicit
Sub TestMediaMarkt()
Dim oRange As Range
Dim aResult() As String
Dim i As Long
Dim sURL As String
Dim sRespText As String
' set source range with product names from column A
Set oRange = ThisWorkbook.Worksheets(1).Range("A1:A3")
' create one column array the same size
ReDim aResult(1 To oRange.Rows.Count, 1 To 1)
' loop rows one by one, make XHR for each product
For i = 1 To oRange.Rows.Count
' build up URL
sURL = "http://www.mediamarkt.de/FACT-Finder/Suggest.ff?channel=mmdede&query=" & EncodeUriComponent(oRange.Cells(i, 1).Value)
' retrieve HTML content
With CreateObject("MSXML2.XMLHTTP")
.Open "GET", sURL, False
.Send
sRespText = .responseText
End With
' regular expression for price property
With CreateObject("VBScript.RegExp")
.Global = True
.MultiLine = True
.IgnoreCase = True
.Pattern = """currentprice""\:""([\d.]+)""" ' capture digits after 'currentprice' in submatch
With .Execute(sRespText)
If .Count = 0 Then ' no matches, something going wrong
aResult(i, 1) = "N/A"
Else ' store the price to the array from the submatch
aResult(i, 1) = .Item(0).Submatches(0)
End If
End With
End With
Next
' output resultion array to column B
Output Sheets(1).Range("B1"), aResult
End Sub
Function EncodeUriComponent(strText)
Static objHtmlfile As Object
If objHtmlfile Is Nothing Then
Set objHtmlfile = CreateObject("htmlfile")
objHtmlfile.parentWindow.execScript "function encode(s) {return encodeURIComponent(s)}", "jscript"
End If
EncodeUriComponent = objHtmlfile.parentWindow.encode(strText)
End Function
Sub Output(oDstRng As Range, aCells As Variant)
With oDstRng
.Parent.Select
With .Resize( _
UBound(aCells, 1) - LBound(aCells, 1) + 1, _
UBound(aCells, 2) - LBound(aCells, 2) + 1 _
)
.NumberFormat = "#"
.Value = aCells
.Columns.AutoFit
End With
End With
End Sub
Filled worksheet with some product names:
Launched the sub and got the result:
It is just the example how to retrieve a data from the website via XHR and parse a response with RegExp, I hope it helps.

Replace text using RegEx in Excel-VBA

I have data in Excel like follows (one row here - one cell in Excel):
07 July 2015 12:02 – 14 July 2015 17:02
12 August 2015 22:02 – 01 September 2015 11:02
I want to write a macro that will delete all time info (e.g. "12:02") within a user's selection (multiple cells) to look like this:
07 July 2015 – 14 July 2015
12 August 2015 – 01 September 2015
When all "times" where similar ("00:00") this macro worked perfectly:
Sub delete_time()
Selection.Replace What:="00:00", Replacement:="", LookAt:=xlPart, _
SearchOrder:=xlByRows, MatchCase:=False, SearchFormat:=False, _
ReplaceFormat:=False
End Sub
But then time-info stopped being uniform, so I decided to use RegEx. The problem is I can't find a proper way to do this on VBA. I tried this macro:
Sub delete_time()
Dim RegEx As Object
Set RegEx = CreateObject("VBScript.RegExp")
On Error Resume Next
RegEx.Global = True
RegEx.Pattern = "\d\d\:\d\d"
ActiveDocument.Range = _
RegEx.Replace(ActiveDocument.Range, "")
End Sub
But it didn't work. Also tried "[0-9]{2}:[0-9]{2}" and "[0-9][0-9]:[0-9][0-9]" patterns but nothing changed. So the problem must be in my misunderstanding of VBA (I'm new to it).
Can anyone help?
The problem is with your selection.
ActiveDocument.Range = _
RegEx.Replace(ActiveDocument.Range, "")
ActiveDocument doesn't exist in the Excel namespace. We have ActiveWorkbook or ThisWorkbook, but what you need now is the Selection.
Use a for each loop to iterate all the cells in the current selection like this:
Dim myCell As Range
For Each myCell In Selection.Cells
myCell.Value = RegEx.Replace(myCell.Value, "")
Next
A faster approach would be to combine your RegExp with a variant array:
'Press Alt + F11 to open the Visual Basic Editor (VBE)
'From the Menu, choose Insert-Module.
'Paste the code into the right-hand code window.
'Press Alt + F11 to close the VBE
'In Xl2003 Goto Tools … Macro … Macros and double-click KillDate
Sub KillDate()
Dim rng1 As Range
Dim rngArea As Range
Dim lngRow As Long
Dim lngCol As Long
Dim lngCalc As Long
Dim objReg As Object
Dim X()
On Error Resume Next
Set rng1 = Application.InputBox("Select range for the replacement", "User select", Selection.Address, , , , , 8)
If rng1 Is Nothing Then Exit Sub
On Error GoTo 0
'See Patrick Matthews excellent article on using Regular Expressions with VBA
Set objReg = CreateObject("vbscript.regexp")
objReg.Pattern = "\d\d\:\d\d"
objReg.Global = True
'Speed up the code by turning off screenupdating and setting calculation to manual
'Disable any code events that may occur when writing to cells
With Application
lngCalc = .Calculation
.ScreenUpdating = False
.Calculation = xlCalculationManual
.EnableEvents = False
End With
'Test each area in the user selected range
'Non contiguous range areas are common when using SpecialCells to define specific cell types to work on
For Each rngArea In rng1.Areas
'The most common outcome is used for the True outcome to optimise code speed
If rngArea.Cells.Count > 1 Then
'If there is more than once cell then set the variant array to the dimensions of the range area
'Using Value2 provides a useful speed improvement over Value. On my testing it was 2% on blank cells, up to 10% on non-blanks
X = rngArea.Value2
For lngRow = 1 To rngArea.Rows.Count
For lngCol = 1 To rngArea.Columns.Count
'replace the leading zeroes
X(lngRow, lngCol) = objReg.Replace(X(lngRow, lngCol), vbNullString)
Next lngCol
Next lngRow
'Dump the updated array sans leading zeroes back over the initial range
rngArea.Value2 = X
Else
'caters for a single cell range area. No variant array required
rngArea.Value = objReg.Replace(rngArea.Value, vbNullString)
End If
Next rngArea
'cleanup the Application settings
With Application
.ScreenUpdating = True
.Calculation = lngCalc
.EnableEvents = True
End With
Set objReg = Nothing
End Sub
The easiest approach to me seems to be to use LEFT and RIGHT functions to extract the two separate timestamps, then to convert these timestamps to dates using TEXT function. Probably easiest in excel directly, but if you want to go down VBA route then example solution below:
' Taking a random date from Cell A1
DateRange = Range("A1")
' Extracting the first timestamp
FirstTimeStamp = Left(DateRange, Application.Find(" – ", DateRange))
' Converting to required date format
FirstDate = Application.Text(FirstTimeStamp, "dd-mmm-yyyy")
LastTimeStamp = Right(DateRange, Application.Find(" – ", DateRange))
LastDate = Application.Text(LastTimeStamp, "dd-mmm-yyyy")
Function ReplaceRegEx(str As String, pattern As String, newChar As String) As String 'recherche et remplace une expression reguliere par une chaine de char
Dim regEx As Object, found As Object, counter As Integer, F As Object
Set regEx = CreateObject("VBscript.RegExp")
regEx.Global = True
regEx.ignorecase = False
regEx.pattern = pattern
Set found = regEx.Execute(str)
counter = found.Count
If counter <> 0 Then
For Each F In found
str = Replace(str, F, newChar)
Next F
End If
ReplaceRegEx = str
End Function

Extract text with regex between ","

I have been struggling making a regex to extract the information in below divided in 3 part between the ",". Only the first and second sequence (Friday and the date has succeded).
Friday, 26 Apr 2013, 18:30
I hope someone has the experience.
Best regards
Why not simply split the string and trim the excess whitespace of the individual parts? For example, verbosely written in C#:
string input = "Friday, 26 Apr 2013, 18:30";
string[] parts = input.Split(',');
for (int i = 0; i < parts.Length; i++)
{
parts[i] = parts[i].Trim();
}
Console.WriteLine(parts[0]); // "Friday"
Console.WriteLine(parts[1]); // "26 Apr 2013"
Console.WriteLine(parts[2]); // "18:30"
If you really want to use a regular expression for this, ^(.*),(.*),(.*)$ should work:
string input = "Friday, 26 Apr 2013, 18:30";
Regex regex = new Regex("^(.*),(.*),(.*)$", RegexOptions.Singleline);
Match match = regex.Match(input);
Console.WriteLine(match.Groups[1].Value.Trim()); // "Friday"
Console.WriteLine(match.Groups[2].Value.Trim()); // "26 Apr 2013"
Console.WriteLine(match.Groups[3].Value.Trim()); // "18:30"
Adding appropriate error checking is left as an exercise for the reader.
The following Regex expression is matching this whole part :
, 18:30
I hope someone has the experience.
Best regards
,+\s[0-9]+:[0-9]+ \r*.*
But yeah, that's kind of ultra specific to this ", Hour:Minuts [...]" format. You should do a split if you're using PHP or the equivalent in your language.
I think what you really want is something like this:
from datetime import datetime
s="Friday, 26 Apr 2013, 18:30"
d=datetime.strptime(s, "%A, %d %b %Y, %H:%M")
d
Out[7]: datetime.datetime(2013, 4, 26, 18, 30)
See the strptime and date format docs for details :)
Edit: sorry, I was somehow assuming you were using Python. Other languages have similar idioms though, e.g. PHP's date_parse, C#'s DateTime.Parse, etc.
You didn't specify a language so I'm going to answer this with a standard REGEX approach.
(?<=(^|,\s+)).+?(?=(,|$)) Will work for you.
Let me break up what it's doing.
(?<=(^|,\s+) - Look ahead for the start of a string or a comma followed by whitespace, but don't include it in the match. All matches must have this in front of them.
.+? - Grab all characters, but don't be greedy.
(?=(,|$)) - Look behind for the end of string or a comma. All matches must have this behind them.
When ran on your test case of Friday, 26 Apr 2013, 18:30, I get 3 matches:
Friday
26 Apr 2013
18:30
Like m01's answer, you could try this approach with C#:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Globalization;
namespace TestDate
{
class Program
{
static void Main(string[] args)
{
string dateString = "Friday, 26 Apr 2013, 18:30"; // Modified from MSDN
string format = "dddd, dd MMM yyyy, HH:mm";
DateTime dateTime = DateTime.ParseExact(dateString, format, CultureInfo.InvariantCulture);
Console.WriteLine(dateTime);
Console.Read();
}
}
}
This will print out the localized date and time that is configured on the user's machine. For me it printed out 4/16/2013 6:30:00 PM.

manipulation on a file - vb.net plus some regex

The below is the content of my file(which is already sorted). Whichever is there between square brackets, relate to one transaction. The transactions can be groupa, groupb,groupc etc.
Jan 2012 02:10:12 [5678](groupa):Part 1:data1
Jan 2012 02:10:12 [5678](groupa):Part 2:data2
Jan 2012 02:10:12 [5678](groupa):Part 3:data3
Jan 2012 02:10:12 [5678](groupa):Part 4:data4
Jan 2012 02:13:14 [12308](groupa):Part 1:data1
Jan 2012 02:13:14 [12308](groupa):Part 2:data2
Jan 2012 02:13:24 [34517](groupb):Part 1:data1
Jan 2012 02:13:24 [34517](groupb):Part 2:data2
I want to output the below data to another file using vb.net. It should contain the transaction group, followed by the time(the time should be taken from the first row of the contents grouped by transaction, then grouped by the number inside the square bracket, in the contents). Next line should concatenate the data(after Part [1-9]:), corresponding to the particular transaction grouped by the number inside the square bracket. For the above contents,
groupa at Jan 2012 02:10:12
data1data2data3data4
groupa at Jan 2012 02:13:14
data1data2
groupb at Jan 2012 02:13:24
data1data2
So first let's create a class to represent that data. It will make it easier to work it. Here is what mine looks like:
Public Class LogEntry
Public Property DateTime As DateTime
Public Property Id As Integer
Public Property Group As String
Public Property Part As String
Public Property Data As String
End Class
Now that we have that, let's parse each line with a regular expression. They aren't my strength, but in this case it works:
Dim text = File.ReadAllLines("log.log")
Dim rx As New Regex("^(?<date>.+)\s\[(?<id>\d+)\]\((?<group>.+)\):(?<part>.+):(?<data>.+)$")
Dim logEntries As New List(Of LogEntry)
For Each line In text
Dim match = rx.Match(line)
Dim entry As New LogEntry With _
{
.DateTime = DateTime.ParseExact(match.Groups("date").Value, "MMM yyyy hh:mm:ss", System.Globalization.CultureInfo.CurrentCulture),
.Id = Int32.Parse(match.Groups("id").Value),
.Group = match.Groups("group").Value.Trim(),
.Part = match.Groups("part").Value.Trim(),
.Data = match.Groups("data").Value.Trim()
}
logEntries.Add(entry)
Next
Here we are loading the text from a file. It doens't matter how it gets the text. After that we iterate over each line and gather the information with a regular expression. Once we parse it, we create a LogEntry and add it to a list. As a list this will make it easier to work. We can use LINQ to group, then print it out:
Dim grouped = logEntries _
.GroupBy(Function(x) New With {Key .Id = x.Id, Key .Group = x.Group, Key .DateTime = x.DateTime}) _
.OrderBy(Function(x) x.Key.DateTime)
For Each group In grouped
Console.WriteLine("{0} at {1:MMM yyyy hh:mm:ss}", group.Key.Group, group.Key.DateTime)
Console.WriteLine(String.Join("", group.Select(Function(x) x.Data)))
Next