Reading And Parsing Large Delimited Text Files?

Nov 23, 2011

I'm busy with an applicaton which reads space delimited log files ranging from 5mb to 1gb+ in size, then stores this information to a MySQL database for later use when printing reports based upon the information contained in the files. The methods I've tried / found work but are very slow.

or is there a better way to handle very large text files?

I've tried using textfieldparser as follows:

Using parser As New TextFieldParser("C:logfiles estfile.txt")
parser.TextFieldType = FieldType.Delimited
parser.CommentTokens = New String() {"#"}

[Code].....

View 2 Replies


ADVERTISEMENT

Reading Delimited Text Files?

Jun 2, 2010

Basically say I have a text file with the following contents:

"Tim", "USA", "1982"
"Jane", "Germany", "1980"
"Brad", "France", "1989"

Can I have a ListBox for each field, one listbox for Names, one for countries, one for years?

View 8 Replies

Reading Delimited Files With Text Qualifiers

May 17, 2012

Is there a set function in vb.net that allows you to read a delimited file with text qualifiers? In the past I have used the split command but that does not allow you to take into account the text qualifiers.

View 1 Replies

Reading Large Text Files

Jan 30, 2012

My problem is I have very large text files (approx 2GBs+).They have records in them based in one per line.Each line is not the same length and the data can be different lengths all the time.I am currently reading the file line by line, then splitting the data by common characters in the records. To process the full file it currently takes 3hours. This is way too slow for its purpose.

View 7 Replies

Parsing A Tab Delimited Text File?

Feb 7, 2012

I'm trying to parse a text file. First I plan on extrcating each line, then extracting each field by searching for a tasb.When I use InStr to search for a (return for end of line) or (for tab) I always get a zero. But if I put in a visable letter such as a I got a 5.also I tried /r, /n and all return a zero.The file looks as follows:

ID Name
1 Patient
2 Bed
3 PatientSet

[code]....

View 2 Replies

Reading Delimited Files And Putting Them In ListBoxes?

Jun 2, 2010

Basically say I have a text file with the following contents:

"Tim", "USA", "1982"
"Jane", "Germany", "1980"
"Brad", "France", "1989"

View 4 Replies

Reading Large Csv Files

Sep 17, 2010

Which is the most performant way to read a large csv file in .NET? Using FileStream? or another class

View 4 Replies

Reading Large Files Efficiently

Sep 12, 2010

I am writing a small tool that identifies digital scielence in non compressed PCM WAV files. Its purpose will be to scan files approximately 1 hour long, containing mostly scilence and spltting the periods of non scilence into files and discarding any digital silence which is encoded as null bytes.I am wondering what the most efficient way of scanning the files is. I am able to derive the number of bytes for each second from the file header (in my case 16000) so am considering reading into a buffer of this size then scanning byte for byte, if I identify a non-null byte I will start siphoning the data off to another file.My issue is with scanning large expanses of digital silence which could be many megabytes of data which would require examining each byte to determine wether or not its digital silence. Surely there is a more efficient way of skipping them as I am not interested in them.

View 7 Replies

Reading From A Comma Delimited Text?

Mar 7, 2011

I have been able to load a drop down meny with a file, but the file is comma delimited. I tried to use the split function to only read the first part of the file before the comma, but I'm getting an erroHere's what I'm doing:

Dim Arts As New IO.StreamReader(System.AppDomain.CurrentDomain.BaseDirectory & _
"Artist.txt")
Do Until Arts.EndOfStream

[code].....

View 7 Replies

Reading Large Excel Files Or Sheets?

Feb 10, 2010

I'm tryng to read an excel sheet that has more than 255 cell. I'm using the following code:

Dim MyConnection As System.Data.OleDb.OleDbConnection
Dim MyDataSet As New System.Data.DataSet
Dim connectionString As String = ConfigurationManager.ConnectionStrings("PCOConnectionString2").ConnectionString

[Code].....

this code throws me an error that indicates me that there are too many rows to read. I found, seaching through forums, that it can't be more that 255 cells on the sheet i'm reading.

How can i read this sheet that has over 500 cells?

View 5 Replies

Reading Space Delimited Text Database

Jan 16, 2012

I am trying to open a text delimited database using the jet.OLEDB.4.0 driver. My connection string is as shown here:
Dim sConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;
Data Source=" & dataDir & ";
Extended Properties=""text;FMT=Delimited( )"";"

I have read that you either need to alter the registry, or to add a schema.ini file containing information about the delimiter in order to recognize the delimiter. My question is if there is any way to do this without altering the registry or adding a schema.ini file, as both of these are unfortunately not an option. The only solution I currently see is to split each row, is this the only way out.

View 10 Replies

Reading Comma Delimited Text Form A Text Box

Nov 27, 2007

I need to be able to read common delimited text that the user enters into a text box. For example the text box would look like this:1,200,02,200,04,120,1203,200,120I need to be able to read the lines and put the data into a multi-dimension array with all the first values in column 1, all the second values in column 2, and all the thrid values in column 3.

View 9 Replies

File I/O And Registry :: Reading Files From A Large Directory?

Jul 15, 2009

I wrote a cleanup program to go through some directories and delete files based on if the creation date is older than say 6 months. It works fine with some of the directories I have that contain around a few thousand small files. However, there is one directory (that contains small backup files from another program) that is loaded with over 300,000 files and it locks up on me as soon as I read in the first file in that directory.I am convinced it is the directory has too many files in it to open it. The server that the directory is on is slow. It takes a half hour to open the directory while on the server itself. I know it will take forever to delete the amount of files I want to delete, but I don't understand why it gets stuck and hangs there with no error message.Here is where I get stuck. Listbox1 is the directory I'm attempting to access

For Each selectFile In My.Computer.FileSystem.GetFiles(ListBox1.Items.Item(Count), FileIO.SearchOption.SearchTopLevelOnly, "*.*")
compFile = Path.GetFileName(selectFile)

[code].....

View 6 Replies

Reading A Text File (Pipe Delimited) Using .net Script?

Oct 19, 2011

I am reading a text file (Pipe delimited) using .net script the sample file is .. first line is column names and second is data

Part Number|Rev|State|Type|Weight|PC Wt Units|Noun Phrase|Noun Phrase Description|Noun Phrase Modifier|Bore|Bore Type|Dynamic Capacity (kN)|Number of Rows|Number of Seals|Number of Shields|Outside Diameter|Type of Ball Bearing|Width-LC|Linear Dimension Units|Max
Housing Fillet Radius|Max Shaft Fillet Radius|Heat Treatment

[code]....

So Here i am getting columns up to "NounPhraseModifier" what ever the columns after that should be inserted into PROPERTIES column.

View 2 Replies

Parsing - Reading Blocks Of Text From A CSV File - .net?

Oct 21, 2011

I need to parse a CSV file with blocks of text being processed in different ways according to certain rules, e.g.

userone,columnone,columntwo
userthirteen,columnone,columntwo
usertwenty,columnone,columntwo
customerone,columnone<br>
customertwo,columntwo<br>

[Code]...

View 1 Replies

Reading / Parsing / Writing A Text File?

Oct 7, 2009

I'm using visual basic 2008 express to do some simple stuff. For this project, Im reading in one large text file.The top of each page has a header section that is always the same, except sometimes a dept# changes, signifying a new set of data.The first line always has the text "RunDate", so when I read that, I know that I'm at the top of the first page.After reading the first line, I'd like to immediately go to the sixth line and grab that dept# and store it.dept = left(trim(myline,7)(Its always 7 characters long) so I know what dept I'm working on.I'll then loop through and write each line to a new text file, until I hit the top of a new page.At that point I need to look at line 6 again. if the dept # is the same, I'll keep writing to the same file.Reading and re-writing from the text files is easy, I just loop through line by line, but I need to be able to jump down to the 6th line, and I don't know how to do that without reading each line to that point"

View 2 Replies

Reading A Very Large Text File?

Jan 30, 2012

My problem is I have very large text files (approx 2GBs+).They have records in them based in one per line.Each line is not the same length and the data can be different lengths all the time.I am currently reading the file line by line, then splitting the data by common characters in the records. To process the full file it currently takes 3hours. This is way too slow for its purpose.

View 4 Replies

Reading Large Text File?

Jul 6, 2011

I've a problem reading text file using StreamReader. The file have between 500 000 and 1 000 000 lines.When I try to read it in a cycle, I get an error. That's why I've tried the StreamReader.ReadToEnd method. It worked fine. I've get the entire contents of the file in one string. So far everything is okay, but I've a small problem searching this huge string. I have to reformat the string to my desired format. I'll try to be more specific: The format of the input file is as follows:

50471100 8 2 6 5 0<LF><CR>
00000016 365442 12231<LF><CR>
00000026 112166 31133<LF><CR>
<end>

[Code]...

View 7 Replies

VB Text Files Hyphen & Comma Delimited?

Jun 12, 2011

My customer requires text files to be written in the following format:

"adrian","sigamoney","01","1","B"

No matter what I do I get in file

adrian,sigamoney,01,1,B

I have tried split, replace, adding extra hyphens to string.

View 1 Replies

[2008] Reading A Very Large Text File

Feb 1, 2009

The following code suppose to:

1. Read line-by-line a txt file with more than 500,000 lines, (each line 521 characters long)

2. extract an ID No from the line

3. query from a database for LCCIStatus

4. concatenate the value of LCCIStatus to the line

5. write the line to sample.txt

My problem is, this code works perfectly with the test file of 8000 lines but fail with the actual files which have over 500,000 lines. FYI, the test file contains data which I cut and paste from the actual file.

[Code]...

View 5 Replies

Importing And Summing Excel (xls) Or Delimited Text Files?

Mar 18, 2011

how to best go about this project. I have just been given the task of creating a program that will primarily be used to import and sum a excel or text file that is tab delimited. As a quick example the file would be in the following format:[URL]The problem is that I would need to store this information locally (unless you know better) because I need to be able to append information to this from a second (or third, fourth, etc...) file and re-sum it, lets say that this is the second excel file that I needed to sum:

[URL]

I would have to append the week5 and week6 columns and add the Neapolitan row to my summation. This program will then format the sums into a list of the different flavors and the sums of all products sold during the total weeks and output to a text file.I have informed my employer that it would be easiest to do this with a VB script in excel, however, they are adamant that they want this done in VB.NET with a GUI.

View 4 Replies

VS 2005 Importing Delimited Text Files To Excel With .NET

Nov 11, 2009

I need to dump a bunch of delimited data to Excel. In VB6 days, I would save the data to a text file, then use ExcelApp.ActiveSheet.QueryTables.Add (blah blah blah...) to import the data to Excel (I got this code from recording a macro while manually importing a text file).In VB.NET (2005), QueryTables does not appear to be an option for ActiveSheet.I could take the long path and manually parse thru the data writing to individual cells - however if I could just import it, it would be much faster.Part of the issue is not being able to record a macro in Excel in .NET format.So my primary question is, how do I import a delimited text file in to Excel without having to manually parse the data into individual cells.Secondary question is any tips for not being able to have ready made examples (in VB .NET format) by recording a macro.

View 3 Replies

Parsing A Comma Delimited Flat File?

Nov 19, 2009

What is the best method to parse through a Comma Delimited .dat file? I am using VS2002 and VB. My code will be looking for certain placeholders within the files and pulling the value from that element to populate a table in SQL2000.Here is a sample of one row that is in the database so far:17768 01 1770 003 2009-11-01 00:00:00 5065.14 NULL NULLEach spaced section is taken from a part of the .dat file, but being manually keyed in for now. My job is to automate the reading of the file, and writing it to the SQL database.Here is a sample of the flat file I am trying to parse:

0001,00003470,091411," "
0002,1000,0037707839,0000304220,0000282256,00000387
0003,1000,006795,0004,00000000,0000,00000000,0000,00000000,0000

There are about 12-13 'records' in each flat file, each row being a record as the sample shows.

View 1 Replies

Text Editor - Loading Multiple Large Text Files

Jul 10, 2010

I'm fairly new to VB.NET, and I'm working on a text editor with a tabbed interface. I deal with large text files. Should I have each tab / text document open up in a new thread or a process? I basically want the entire application to always run fast as the text editor is just one part of it. If I have several large text files open I don't want the rest of the application slowing down a bit.

View 2 Replies

Importing And Parsing Text Files Hex Code?

Aug 20, 2009

I am try to import a text file read it's hex code search for a specific string and replace it with a different string. and write the changed file. I so far have a why to browse for the file on my form but not sure what to do from there.A

Public Class Form1
Public fdlg As OpenFileDialog = New OpenFileDialog()
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As

[Code].....

View 9 Replies

File I/O And Registry :: Reading TAB Delimited File Using MS Text Driver

Jun 14, 2011

I am trying to import a TAB (NOt comma) delimited text file into a DataGridView. The following code works fine if I have a comma separated file. All I have to do is change the FMT to "Delimited".It just does not work with FMT=TabDelimited. All columns are read into single datatable column. The text file is ANSI text and I have double checked to make sure Tabs are tabs and not spaces, even exported a sample Tab Delimited file from Excel.Can this even be done using Text Driver? [code]

View 2 Replies

C# - .Net String Parsing Library Or Regex For Parsing .Net Code Files

Mar 5, 2009

I would like to be able to parse vb.net code files, so I can examine the collection of Subs, Functions (and their contents, including comments), private variables, etc. I can be open the actual source code files. So for example, if I have:

[Code]....

View 7 Replies

.net - Check If 2 Large Text Files Content Are 100% Same?

Jun 29, 2011

I have two large text files (about 1.8 GB each encoded in UTF-8). And I want to check if the content of both files are 100% same. If there is single character difference then it is considered not same, i.e. both files are different. How do I do that? So my question is: How to check if 2 large text files content are 100% same?

[Code]...

View 2 Replies

Import Large Textfiles (Delimited) To Microsoft SQL / MySql Server?

Jun 27, 2011

Is is possible to import or migrate .txt files to my database? Im using VB 2010 Express. Im just a newbie in Visual Basic and I need to import a text file into my system.

View 3 Replies

VS 2010 Comma Delimited Text Into Tab Delimited Text?

Feb 11, 2011

how to make a text conversion like the below pic -

1. the textbox 1 is multiline with an array of comma delimited and tab delimited text.

2. the textbox 2 is one line textbox

3. A,B,C,D,E,F,G is where the position of each string before / after conversion

View 5 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved