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 RepliesI'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.
Okay 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 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 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.
[Code]...
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'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 have a string that looks like this "apples,fish,oranges,bananas,fish" i want to be able to sort this list and get only the uniques. how do i do it in vb.net? please provide code
View 3 RepliesI have a dictionary in the form of: { "honda" : 4, "toyota": 7, "ford" : 3, "chevy": 10 }
I want to sort it by the second column aka (the value) descending.
Desired output:
"chevy", 10
"toyota", 7
"honda", 4
"ford", 3
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 the need for key value pair that I wish to sort so I decided to use a SortedList instead of a HashTable.I am adding the data in the order below to my SortedList which is the order I need it in
Key | Value
--------------------------------
1 "700-800" | List(Of Object)
2 "900-1000" | List(Of Object)
[code]....
The key is a string and the value is a List of objects. The key is representing a time slot that has been concatenated from two integer values and delimited by "-". "700" as a string was 0700 initially an integer.e.g.
Dim key As String = slotTimeStart.ToString() & "-" & slotTimeEnd.ToString()
But once these key value pairs are added to the SortedList they appear in the order
3 "1100-1200" | List(Of Object)
4 "1700-1800" | List(Of Object)
[code]....
Unfortunately I recieve the times slots as two integer values which cannot be changed.Is there any way to force a sort on a SortedList? or is this problem because of the way I am storing my key? Is there a better way to store it?
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 have an XML that looks like this:
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="library.xslt"?>
<Library>
[code].....
How to sort a recordset using vb 6.0 coding?
View 2 RepliesI need to know if there is any simple way to sort an array in visual Basic.net. I have been trying for some time without any real reliable results or wierd results. Here is the code this is the sort routine which transfers a csv text file read earlier into an array.
Private Sub btnSort_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSort.Click
Dim i As Integer = 2 'inner loop
Dim j As Integer 'outer loop
Dim tempstore As String = String.Empty
ProgressSort.Minimum = 0
[Code]...
The data seems to be read into the array but the sorting takes a very long time and I am not sure if it is working or not. I have read from other forums that it is easier to sort the array read from csv before splitting it. This record I am trying to sort is 250 records long. I have no idea how long that should take. Not even sure if the algorithm I chose is correct.
I have a problem with sorting in datagridview. I load an xml file in a datagridview and I sort the collums for check. when I try to sort it according to it's number the sorting goes like this:
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I have two columns in a datagridview, one is a year and the other is a month. These two form a date, but unfortunately the structure in the database I'm forced to use is that of two integers. I need to sort the rows by date, using these two integers. I tried creating an unbound column with a date, but sorting this way seem quite difficult. So, I thought I could do a multicolum sorting by year first and then by month using two columns
View 1 RepliesI have 2 strings one index: 4, 2, 5, 3 and second one times: 205, 153, 320, 300. I need to sort second string ascending, but to change also positions of elements for the first string and maintain position which corresponding with position for second string:For example initial i have:
index: 4 2 5 3 2 4 3 5
time: 205 153 320 300 after sorting 153 205 300 320
How do I disable datagridview sorting?
View 1 RepliesI have this hierarchy of XML
<Chapters>
<Chapter @num="">
<Section @letter="">
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There has got to be a simple way of doing this....
I've written the following class to create CheckedListboxes that use a Natural Sort algorithm. The overridden Sort() method, however, is not getting fired.(The code within that method is from the MSDN example on how to implement your own sort algorithm on a regular Listbox.)
[Code]...
A CheckedListbox derives from a Listbox, so I figured the Sort() override would work, but I'm stuck as to why it doesn't.I am setting the instance's .Sorted = True, but it's just sorting items using the default algorithm, and not the Natural Sort algorithm (which has been tested and shown to work as expected elsewhere).
I have a list of keys and values that I would like sorted by key via a custom Comparer(Of T). I tried using a SortedDictionary, but kept getting incorrect results because it used the comparer to see if the items were the same. For example calling SortedDictionary.ContainsKey() would return false, even though it did contain the key.
When I stepped through the code after calling ContainsKey(), it would go to the comparer.Compare(x, y) function. It would then only compare against a few of the keys in the dicionary, and somehow skip the matching item (which I ensured did exist). I take it that this is some sort of optimization, where some items are skipped depending on what is returned by the comparer.Compare() function? Is it possible to have a dictionary that only uses the comparer for sorting? EDIT: I am using a Type object for the dictionary's key
[Code]....
I'm trying to sort a dictionary by value with LINQ but I can't figure how the ToDictionary() method works.
All the examples I can find are in c#.
here's my code
Dim f As Dictionary(Of String, String) = (From value In projectDescriptions.Values
Order By value Ascending
Select value).ToDictionary(???)
[Code].....
I am trouble in sorting 2 dimensions array in vb.net. One row has 5 columns. Original array have 3000 rows.How can I get the effective sorting with pdtId. I tried to find googling, cannot get the right answer to me.
(0, 0) = pdtId "string"
(0, 1) = brand name
(0, 2) = category Id
(0, 3) = url
(0, 4) = date
[Code]...
gridview sorting in VB.NET: I have a gridview with autogenerate columns = true
<asp:GridView ID="GridView1" FooterStyle-BackColor="Aquamarine"
AutoGenerateColumns="true" AllowSorting="true" OnSorting="Gridview1_Sorting"
AllowPaging="True" PageSize="12" OnRowCreated="GridView1_RowCreated"[code].....
I've declared the sort event handler (OnSorting="Gridview1_Sorting" ), and it works fine.However, then I change the column title (headers as they are in the dataset which I get from the database)
GridView1.HeaderRow.Cells(0).Text = "Document" ' "PROC_UID"
GridView1.HeaderRow.Cells(1).Text = "Process Step" ' "PROC_DOC_UID"
When I set the HeaderRow text, I can no longer click on the title to sort (it also is no longer underlined).How do I correct that?
I'm trying to bubble sort an array then display it in a list box. When I click the button the program crashes.
Here is my code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If Not TextBox1.Text = "" Then
ListBox1.Items.Add(TextBox1.Text)
[code]....
And the compiler gives me this error: A first chance exception of type 'System.IndexOutOfRangeException' occurred in WindowsApplication1.exe