Store Data In List?
Jun 23, 2011
I just wondering if Visual Basic.NET and VB6 can do these examples.I have use python before and i will take some examples.Save numbers to a list and add
Quote:
this_is_a_list=[1,2,35,4564,532,2454,3404,3,455,2,1]
x = len(this_is_a_list)
this_is_a_list.insert(10, x)
len is a function who count how long a list is. This list is 11 numbers long. I will now insert/add number 10 after the last number. The first number has the place 0. The second number has the place 1.Can VB.net do that? Check how long a list is?Delete a list?
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Feb 20, 2009
In .NET which data type do you use to store list of strings ?Currently I'm using List(Of String) because it's easier than Array to manage and add/remove stuff. I'm trying to understand what are the other options, when they become handy and when I should avoid List(Of String) usage.
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May 17, 2011
I have a string with xml data.Dim appManifest As String = New System.IO.StreamReader(Application.GetResourceStream(New System.Windows.Resources.StreamResourceInfo(e.Result, Nothing), New Uri("AppManifest.xaml", UriKind.Relative)).Stream).ReadToEnd()
[Code]...
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Mar 22, 2012
I am coding a program that will allow the user to input 5 payrolls for Store 1, Store 2, and Store 3. The total of the 5 payrolls are then added together and shown in the respective Store's labels. A total label is also there to add up all the totals into one number. The numbers in the label must be in currency form. My problem is the numbers don't add correctly when I hit calculate. The first two numbers add together, but then after that the number just seems to subtract a random amount.
So far I have this --
Public Class Form1
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Me.Close()
End Sub
[CODE[...
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Aug 17, 2010
I have a set of points. The connections among them areenerated. How can Draw lines between theconnected points?In the example below, Plist is the connection list among them. How can I store points to PList so that it draw lines?
Public Class Form1
Dim Matt(7, 7) As Integer
Dim NumberofConnections As Integer
[code].....
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Jun 7, 2012
I'm trying to store a bunch of integers into a list. I need to be able to find a integer in the list, and change it somehow. I've tried an array, but it wont let me change the values?
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Sep 21, 2010
Is it possible to store two related numbers in a list and then check them if the are exist in the list?ere is an example of what I did to achieve the above:
Dim CounterConnections, FromN, ToN As Integer
Dim ConnectionsList As New List(Of Integer)
Dim Myrandom As New Random
[code]....
The above code generate two random numbers and store the in a list. I am adding the two numbers to be one so that I can check if they exist in the list.e.g. if the FromN = 7 and ToN = 11 then the list will consist of :
711 and 117
a list to store 11 7 and 7 11 which is capable to be checked later if some some numbers are exists.
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May 24, 2012
I have a WPF form that takes a list of objects that have locations and sizes and plots them on the canvas. I'm currently trying to implement an undo button that will throw out all the changes that have been made to the positions of the objects and revert back to the original collection that was retrieved when the form loaded.
As it stands now I go out to the database on the load of the form and get all the objects that will need to be displayed then assign the list that is returned to two seperate collections. The problem that comes up is that the two collections are actually pointers to the original collection and whenever one is changed the changes are reflected in the second collection.
Is it possible to copy a list of objects so that changes made to one collection won't affect the secondary collection?
So far I've tried simply using the assignment operator, passing the source collection into a function byval and scrolling through each element of the list manually adding it to the second collection and using linq to get all the objects from the original list and pushing the results to a separate temporary list and assigning the second collection to the temporary list.
I feel like I'm overcomplicating the issue but almost all the places I've come across while googling say that this behavior is by design, which I understand but it seems like this would be a fairly common idea.
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Sep 8, 2009
How to store the state of my check box list tick boxes accross the page life cycle? Here I have a unbound checkbox list control where values comes from xml file. How to retain the state? Moreover, when I click on Next button to the new page and comeback state is retained. But when I click on the back button and come to the same page state is not retained.
Protected Sub chkBx_SR_wu_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Handles chkBx_SR_wu.SelectedIndexChanged
Dim i As Integer
i = 0
Try
For i = 0 To chkBx_SR_wu.Items.Count - 1
[Code] .....
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Dec 2, 2010
I have a list of files and all of them have a different size. I need to upload them in chunks of 250Kb (or less if it's a small file or if it's the last chunk of a file).What I would like to do is read a bunch of chunks (lets say 15 chunks), in a separate thread, and then store the chunks of data in some sort of list. This list must be available to other threads.
An upload thread (I don't need help with uploading itself) takes the first chunk from the list and marks the chunk as "currently being uploaded". When the chunk has been fully uploaded, then the chunk is removed from the list. A second upload thread takes the next available chunk in the list that has not been set to "currently being uploaded", etc. There are a total of 10 upload threads working at the same time.
As soon as a chunk is removed from the list, then a new chunk of data is read and added to the list.Does anybody know what kind of list I need or how I should do something like this? I don't expect people to write out the code for me, but I have no idea where to start with this.
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Nov 30, 2010
I have a .txt file i want to read that has states by abbreviation and states by name. In that text file some are territories and some are states.
I want to read from that file and put the abbreviations into one structure array and the states into another structure array.
I then want to lookup up the states by abbreviation or state name. The lookup will simply be selected by a radio button which will flag either the states full name array, or the abbreviation array.
all I have is the structures created:
Public Class Form1
Structure Lookup
Dim Abbreviation As String
[Code]....
How can I read from the .txt file and store into an array
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Sep 11, 2009
I am new to VB.net. I want to read and input file and store that data to an SQL Server database. Do you have an sample code that do such?
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Mar 2, 2012
I have a modbus TCP device that I have managed to connected to through my VB source code.
I want to poll (continueously read) data from certain registers of the device, and store the polled data in a file (text,csv, excel).
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Feb 14, 2011
I have an application that uses Dataset.WriteXML to create a small backup before data is syncronized to a data store (less than a meg).This application has worked well for 5 years now, and all of a sudden with the installation of XML 6.0 SP2 the XML document is not working correctly.I have multiple tables within a Dataset (Company, Contact, Notes, etc...)When WriteXML is called, the first table should be Company, however, the first table is being named Contact with the Company Data in it. The Notes table is being called Contact and so forth. In other words it's not giving the correct names to the tables in the XML File.This appears to be a bug, which is causing great distress on all the companies who have been using this program.
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May 15, 2010
the dropdown list is showing data from database, but how to retrieve the selected value and store it in a session variable??
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Dec 12, 2011
i just want to know how to get a template and store it in a data base without using data set
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Jul 31, 2011
I hope this is the correct place to obtain a little bit of advice for a program I am looking to produce in visual basic 2010.
I currently work as a design engineer designing press tools and a lot of our designs are similer just maybe a feature, length, diameter change etc. So the design principles are the same for each product.
What I am aiming to do is program the 3D design package so that 80% of the tool design can be done using the program etc.
Now the enquiry I have is where would the best place to hold the standard data be?
For instance each press has a maximum blank diameter, shutt height, bores diameters in the bed and likewise each product type has design features with the same calculations such as length, pierce etc.
I have done a bit of reading and I have found that data can be stored into text files, xml files and databases etc or hard coded into the program.
I am looking to allow new presses to be added so the user would need to add new shutt heuights, blank size etc but the tooling would have to be unqiue dependent on the typs of stage. So I am wondering to store this information would a database be the best option even though the data will not be continually updated more a place for it to be retrived from excpet under failry rare circumstances.
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Jul 24, 2009
I was thinking about using an access database to store the data but I would like to know if there is a better way of storing data?
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Dec 30, 2010
This is what I'm sure will be the first of many noob-ish questions from yours truly... I'm studying as a mature student for a Computing Degree (encompassing web design, hardware, programming and systems analysis). The programming seems to be my weak spot this year. I enjoyed C++ last year, doing basic console applications, but progamming visually with VB in Visual Studio 2008 I'm struggling!
[Code].....
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Dec 19, 2009
I'm writing an app in vb.net and was wondering wath the best way to store/retrieve data was?
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Mar 31, 2011
I've just finished an application which does everything I want within the Visual Studio environment now I need a way to store the data the user creates but I've never had to do it before and am a bit lost. I've spent days trying to use XML to do this but to no avail mainly cos my classes use ArrayLists as properties and it gets a bit beyond me. I've been told that ArrayLists were not the best choice for this and would be prepared to change my design if need be if I thought the end to this problem was in sight.
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Apr 21, 2011
I am reading data from wordpad one by one which records the sale of grocery item by barcode. I want to store it in memory so that after reading the whole file I can calculate the total number of the same items sold by comparing the bar code.
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May 21, 2010
I'm making a program that uses XML to store data and I'm having problems retrieving the data. Here's an example of how I'm storing data:
<?xml version="1.0" encoding="utf-8"?>
<main>
<category>
[Code].....
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Aug 5, 2009
I'm having problem displaying and storing data from RS232 to access 2007. I have a PIC demo board that sends SMS via AT commands. I want to grab useful information like phone numbers and status message and store/display to access/richtextbox respectively. Right now every line of AT commands are display. And does not store to access. How do i search for the string with numbers like phone numbers?
[Code]...
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May 31, 2011
I'm creating a program that outputs Quotations (and other information relating to these 1. What is the BEST way to read/write from a database (I only really know how to use Access but if XML or SQL would be better, I'm willing to learn). The database needs to be stored and accessed from the same state every time that the program opens. I've tried multiple different ways, both through DataAdapters (in code) to doing it through connecting the database through the Visual Studio GUI. Neither have seemed to work. Other people have told me that using DataAdapters and such aren't the best way, but no one has been able to tell me what this 'best way' is. Also, I need to somehow be able to link pictures in the database - apparently it's not easy to do in SQL?[code]...
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Apr 18, 2009
i want to store data for Pilots ( a program i am working on ), i want to store the Callsign (ie UKV1918) and there Lat and Lon (latitude and longtitude)I need to be able to update the pilots lat and lon, and remove the pilot when they disconnect.
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Feb 23, 2009
Is it possible to store data in memory or a temp file so that if my application crashes information such as text boxes can be restored?
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Jul 18, 2010
I m trying to create a windows app that will store employee working hours of everyday. Is there any way to store a week much data in some sort of file or somewhere else beside database ? Or I have to use some sort dbms.
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Mar 31, 2011
I'm not sure how to do this but I want to store data in several collections. I want the data to be stored / accessed as follows.
CombatCollection("Joe").CombatRecord(1).AttackRecord(1).Damage
how these nested structures or collections are defined and used?
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Aug 15, 2011
I am using sql in and am stuck. after "selecting * from table", how do i store whatever I have obtained from my database in a variable, for display?
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