I'm a relative novice when it comes to object oriented programming..
How can I use VB.net to efficiently read a large .CSV file, store the records (rows) in a table (an Object or an Array), and then sort them using multiple keys? (e.g. sort by Last Name and First Name) After some additional processing, the output will be written to another .CSV file.
I have a spreadsheet in .XLS format that contains more than 60,000 rows with 12 columns per row. The first column contains the person's name (Last First Middle), which needs to be split into three columns by pushing columns 2 - 12 over into 4 - 14 and making 1, 2, and 3 the Last, First, and Middle Name columns. Then the file needs to be sorted by those three name fields and match-merged against the results of a SQL query (4,000+ records), which is being generated within the VB.net program.
Using VB.net, I can read the .XLS file, parse out the Name, and save the 14 columns into a 2-dimensional Object array. But I can't figure out how to sort it because 'Array.Sort(spreadsheet_table)' will only work on a 1-dimensional table. Maybe I shouldn't be using an Object, but I'm inexperienced enough that I couldn't get DataTable to work.
I'm writing the program as a "Console Application" using Visual Basic (VB.net) 2008 Express Edition in a Windows XP SP3 environment. The following is an example of the input data:
I would like to sort out the repeating lines after reading the text file.
For example i would like to sort:
VERSION 600
LIBRARY [2009/6/15 15:02:14, 2009/6/15 15:02:14] temp.gds
UNITS 0.001 1e-009
[Code]....
How do i continue from here to sort the textfile to get what i want?
I have a txt file, that i want to read into my program. The problem is this:The textfile is a stats file for a game and looks like this:
Code:
ip:port wins username points
ip:port wins username points
ip:port wins username points
ip:port wins username points
ip:port wins username points
etc.
The main thing i want to do is sort these things out and then add to mysql database table that would have these columns:
Code:
ip authid wins username points
So what i wanna do is splitting this textfile data up and then adding everything to a mysql table.
I have managed to access and read a specific file line by line. If I wanted to split information by a comma or space and then sort alphabetically or numerically, how would I go about this procedure? Would I create a loop within the reading loop to parse the information?
Dim file As String = "C:Users est.txt"
Dim Line As String
If System.IO.File.Exists(file) = True Then
[Code].....
I was trying to use the sample code at [URL]4 and am having the problem.I can't seem to create the file "test data.csv". When I insert a MessageBox before System.IO.File.WriteAllText line, the MessageBox appears when I run the program. When I place a MessageBox after that line and run, the MessageBox does not appear. Additionally, I cannot locate the file on my C drive.
View 6 RepliesOkay so I am very new to visual basic I am currently using VB 2010 I know that this is not the correct forum but I figured it was the closest to it since there is no VB 2010.Anyways I am making a program for my Dad's company that can keep track of inventory so I need to store the info in a .txt and load it up etc. I currently am using a stream writer to write to the text and I got that down pat I am just having troubles loading it back up and putting the info in specific text boxes aka sorting or parsing? the information. I have looked at several tutorials and the problem is that I just simply don't know what I am looking at I've been tinkering with it for a couple hours now with no luck so I hope you guys could help me out .
Here is my current code. It is kind of useless because I have tried so many methods I thought maybe I could use a ReadAll function have it go to a string and parse from there hoping it would have been easier but it has not worked out for me so far.
[Code]...
^This above is just the output in test.txt and what will eventually need to get sorted into respective text/list boxes .
I am still trying to accomplish a tiny flatfile based database. So far everything works fine except for the fact that 'data records' are not sorted alphabetically. My 'data records' are saved in files and their filenames are used as ID. Now all the data are stored iin the files, so, my application reads out the values and adds them to the 'database'. Unfortunately, I couldn't find any way to sort this added data alphabetically by name - everything else works perfectly and I am almost finished, except for the sorting.
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how to sort the files in the directory ?i'll have more than 500 no of files in the below format.
prod_orders_XXX_<TimeStamp>.dat
XXX = symbol of the product and the length may varies between 3-6.
<TimeStamp> = date and time
Multiple files for the same XXX are possible with different time stamps.Here are some examples:
prod_orders_abc_20122001083000.dat
prod_orders_abc_20122001083111.dat
prod_orders_xyz_20122001093157.dat
[code]....
I have a VB.Net 2005 application in which I access a SQL Server DB to pull data into a Dataset. Within my app, this dataset is read sequentially. Then, a cross reference file is read against the dataset record. If there is a match (based on 2 fields from the dataset record), a field value from the cross reference file is used to replace a certain value in the dataset record. Once a dataset record has been read and processed...it is written to a new CSV file. This CSV file contains 5 columns.
I've been requested to now sort this new CSV file using 3 of the 5 columns as the "Sort Key". What would be the fastest way to do this?
I know one way would be to create a new dataset and insert the finished record into this new dataset in the order of the 3 fields (which I'm not sure how to setup).
I'm having my program sort an excel sheet by a few columns. However, it is only sorting by the first column not the rest that I specify.ere is my sort code below:
myRange.Sort(Key1:=myRange.Range("A:A"), Order1:=XlSortOrder.xlAscending, Key2:=myRange.Range("G:G"), Order2:=XlSortOrder.xlAscending, Header:=XlYesNoGuess.xlYes, Orientation:=XlSortOrientation.xlSortColumns)
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I have a WPF ObservableCollection which is bound to a ListBox and I have a Sort() method which when called will convert the ObservableCollection to a List(Of T), and undertakes a sort based on a date/time column within the collection.
The data is sorted, even when new items are added to the ObservableCollection, however the date/time isn't being correctly sorted. The data is sorting based on the date however it is very much random when it comes to the time portion. The following is an example of the outcomes I am experiencing:
[Code]...
Is there anything that I am doing incorrectly in this method that would cause the time portion not be included in the sort? Is there a better way of doing a sort?
I am working on a project in VB 2008 and need it to do this:Read first line from text file (using Openfile)Enter line into textbox on formDo some other codeThen Read second linefrom text fileEnter line into same text boxand loop until we have gone through text fileI am not sure how to read line by line from text file then enter it in textbox. I can open the Openfile and get the filename and everything, but I just am not sure how to read from it or enter that line into the textbox.Here is what I have, its not much but its a start:
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim FileReader As StreamReader
[code]....
I'm trying to make a simple program that stores my accounts in a .txt file. Each account has 3 properties, account, password, and source. I know there are alot of better ways to do this, but I'd really rather use a text file because I'm working with PhP also.
testacc1 password1 source1
testacc2 password2 source2
testacc3 password3 source3
I can easily write this to a .txt file, but how can I go through it?
Sorting data from a file
View 2 RepliesThis code is working but i have a few problem in sorting of existing file.. example. Output:
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I'm using Visual Studio .Net 2008 on Vista. The goal of my program is to watch a directory, get file information, then sort them by thier date, and produce a updated text file. I can't seem to get my code to generate a list of files sorted by date. The code does produce a general list of files, however presently ordered in the directory. I also tried an alternate way of sorting the files by date by creating a string, removing the date using substring, then comparing the file dates using datetime.parse but it produces a exception error. My first method using the structure follows:
[Code]...
Ok so I know that you can sort by using a bunch of different sorting algorithms but I just am not sure how to start this off. I have written this code and just want to know if you can even sort this.
The program takes the users information in from text boxes from another part of the program and writes the information into a text file. So when the user clicks on this button it will display all the people that have entered in their names. I want to sort their last names alphabetticaly.
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnListCustomers.Click
[Code]...
how would it be possible to sort a text file?i have a file named "Alarms.txt" and I am using a streamwriter to save the date and time of the alarm into the file.What I want to do is everytime I insert a date and time, the text file sorts itself this is what the data inside the text file looks like (unsorted)
View 6 Replieshow to sort .txt file by first column and the second column the first row is the header
<ticker>,<date>,<opening>,<high>,<low>,<close,<vol>
RIBL,20100329,30.1,30.3,30.1,30.2,205085
RIBL,20100330,30.3,30.5,30.3,30.5,405092
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I know similiar question have been asked but they are a little different so here I go. Basically I have a game in which the user enters their name and they get a score. This name and score then get recorded when they end the game as follows:
Dim userdataSW As New StreamWriter("E:GameScores.txt", True)
strline = frmVictory.TempPlayerName & "," & frmVictory.TempPlayerScore
userdataSW.WriteLine(strline)
userdataSW.Close()
userdataSW.Dispose()
What I then need to do is sort these values in the text file from largest to smallest (based on the number not the name but I still want the name to be assosiated with that score) so I can have the top 10 scores appear in a hall of fame type thing.
I am doing an assignment for my intermediate programming class. It is due tonight at 730. Anyways, I am almost finished, but I have run into a snag. I have this "bank application" and we are storing the info in a text file. However, whenever there is a deposit or withdrawal, the "accounts.txt" file is to be updated. All of the new account info is being written to a "Temp.txt" file and eventually will be renamed to the new "Accounts.txt" file. The problem I'm having is that it isn't writing non-updated account info to the temp file and I don't know how to make it do that while keeping the accounts in order and not rewriting the same account info more than once.
Here is the code for the entire project so far:
Imports System.IO
Public Class Form1
Private Sub btnProcess_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnProcess.Click
lstDisplay.Items.Clear()
[Code] .....
I have been trying to create an application that will read in the contents of a text file, sort the contents, add together any similar Client-Matter codes (based on the first two field values) and then create a new text file with the summarized results. [code]The first two fields can be treated as one field for sorting purposes. The two 403049,000017 lines would add together the last field, and use the most recent date in the newly created file.For some reason, I can not get the new file with the results created. I added messageboxes throughout the code to see where I am going wrong - they tell me where the program is going. They seem to point to me that everything is working but still, no export file.[code]
View 1 RepliesI'm using Visual Basic Express 2008 and I need to upload and sort two data text files (notepad) in a listview box. It doesn't have to be a listview box I chose that because it has nice options for columns. Anyway I've got the code set up to open the dialog box and allow the upload of multiple files. I've also got it set up to show separate columns, movie titles and box office amounts, titles in one file box office amount in the other. What I nee sorting the data once it's uploaded so the movie titles show in one column and the box office amounts show in another. Currently everything is showing in the left most column. I'd like to be able to represent the data seperately also so I can format the dollar amounts into currency. Here's what I've got so far:
Private Sub LoadButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LoadButton.Click
Dim DialogBoxResults As System.Windows.Forms.OpenFileDialog
[code].....
I have problem with Sorting ListBox in Visual Basic 2008. When I load names from some files (file's name is number_name like="156_blabla") and I need sort it by that number
It is:
1018_name1
102_name2
1026_name3
And I need it:
102_name2
1018_name1
1026_name3
I have lines like this
1.0 30 Blue (2 15.50 27.0) [2 15.48 24.1] 96111 19775 100493 19608
1.0 30 Blue (2 16.00 25.0) [2 15.26 23.7] 99111 23275 101123 18112
1.0 30 Blue (2 15.12 22.0) [2 14.97 17.9] 103611 17087 109706 16065
1.0 30 Blue (2 15.50 21.0) [2 15.15 21.4] 105111 19775 104509 17325
1.0 30 Blue (2 15.00 23.0) [2 15.23 17.9] 102111 16275 109706 17876
I want to sort the column that i higlighted in accending order.This is my code so far:
Dim FileContents() As String = IO.File.ReadAllLines(wirebot50)
For Y As Integer = 0 To FileContents.GetUpperBound(0)
If Not FileContents(Y).Trim = "" Then
[code]....
But this does not sorting anything. What is the wrong in the above code. And if i want to sort in decending order how to modify the code?
I need to write data to a file, preferably in binary format, but I am unaccustomed with the concept. Where's the easiest place to get the basics? I could come here with a specific need, but I'm at the point right now where I am more willing to work within the confines of keeping it simple.
Here's what I know:
1. how to open a new file
2. how to specify the record length
3. how to close the file
Some specific questions:
Does the record length have to be constant throughout the file?
Can I read the nth record without reading the whole file?
I've this txt file (almost 60 MiB)
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Every line starts with 56000 then the first key, the the second key and the rest of the line. I tried to use SORT, that's included with Windows. It does a pretty nice job, but i need to have my own function in case SORT is not available. The output should write 560001002001 at first.
I have line like this in text file
-----------------------------------------------------------------------------
( Pin ) [ Probe ] Length = in.
| From | To | From | To
Length|Ga|Color |(b r c )|(b r c )| X Y | X Y
------|--|------|---------------|---------------|-------|-------|-------|-------
[code]....
i want to sort the above column inorder that, all the line contain Twst will come first then blue, red and finaly black. This is my code so far
Sub coloursort()
Dim lines() As String = File.ReadAllLines(TextBox1.Text)
For Y As Integer = 0 To lines.GetUpperBound(0)
[code]....
But the above code replace the line with 1,2,3,4 or 5. According to select case statement. How to modify the above code so that it sort the lines?
In the past, I have learned by reading three or four other people's coding and once I gained understanding of how it worked, I could easily write my coding. I've got I will say this is a school project, so I don't expect anyone to just throw coding at me. I'd like to actually learn this stuff! Also, I HAVE read my book (over and over) and also requested help from the instructor, but as I'd like to meet the deadline on this project, I'm having problems waiting on his availability or lack thereof.
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