Storing Data In Arrays?
Apr 22, 2011storing data into an array. I understand how to place information in one record eg in index 0, but how do i place data into several records(indexes).
View 4 Repliesstoring data into an array. I understand how to place information in one record eg in index 0, but how do i place data into several records(indexes).
View 4 RepliesI am trying to store 8 separate pieces of information in a text file (like a database) [but not a SQL database], consisting of integers and strings. How would I use an array to do this? Will an array collect data from text boxes (I also want to display the 8 pieces of information in separate boxes). also how would I save the text file so I can open it again or open a different text file (database?), from within the program?
EDIT: I see I need to use readline and writeline to read/write from a text file but how would I find specific data to show in my boxes?
My xml files were looking a bit clumsy when i read them, what i have done now is to save them in the xml in this format:
vb.net <field>{value1|its partner value2}</field>
i noticed {|} this is the format that vb.net uses for arrays, i was wondering if that's an ok way to store things, on retrieval once i get the node value, what would be the best way to break up the {value1|it's partner value2} variables to use, explode the | and get parts (0) and (1)?
i am using vb 2010 i was working with images.....i extract a pixel from the image using getpixel()...but wen i assign it to an array of colors i am getting a run-time error.
"Object reference not set to an instance of an object."
I'm still doing upgrades on my program that i'm creating and i've run into a bump again. I'm currently using a multi-dimension array to store a name, email, password, email provider, and user name. These 5 values are stored, corresponding with the latter, meaning the array is build as: name 1....n user name 1....n user email 1....n user email provider 1....n password 1....n So my question is, how can i store this in My.Settings? To be clearer, i'll use code: My.Settings.Name = name My.Settings.UserName = userName etc..... My current set up for a first run is like so... My.Settings.Password = adminInfo(2, 0) My.Settings.UserName = admingInfo(1, 0) etc.
View 11 RepliesThe scenario is:
1)A large 2 dimensional array (400,20)
2)The program needs to access particular chunks(for example (0,20) to (50,20)
3)The program will open multiple files and process each into it's own 2D array (400,20)
What I have right now is code capable of creating the array, but no way to store the array so that I can open a new file and process that data into another large array. Someone mentioned the generics List(of T) might be a good way to store each new array as you could use the Add function. I have done some research on the List(of T) class but I'm not totally convinced that is the way to go. I'm just looking for some direction as I've just started on .net this year.
i have declared an array which i want to populate with names, as they are entered into an input box.It does not seem to work i have tried many other methods with the array but to no success.
Dim namearray() As String
Dim i As Integer
name = InputBox("Enter the candidates name:", "candidatename", "", 500, 500)
name = namearray(i)
i = i + 1
SI have a form and on submit I need the following variables stored in array.
Dim OrderName, OrderNumber, OrderSize, OrderQuantity, OrderAddOn, OrderEachPrice, OrderTotal As String
So pretty much its an order a customer will be making and every time a new order is placed, a new array will be made.
Example:
OrderName = TextBox1.Text was Sean
OrderNumber = TextBox2.Text was 123456
OrderSize = TextBox3.Text was Large
OrderQuantity = TextBox4.Text was 2
OrderAddOn = TextBox5.Text was Pocket
OrderEachPrice = TextBox6.Text was 10
OrderTotal = TextBox7.Text was 20.00
On submit a new array would be created and would be something like this:
Dim ArrayName(,) As String = {{"Sean", "123456", "Large", "2", "Pocket", "10", "20.00"}}
BUT a new array has to be created each time the submit is clicked.
I'm trying to read data from a text file with multiple records and fields separated by tabs to store into arrays, which I later want to output into a textbox on the form. The problem is that with the code I've written, when I debug it it exits the sub procedure when it enters the first loop where the parser is reading the text file. There are no error messages, it just exits? I'm not even sure if what I've written is possible. Here's what I've written so far:
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I am reading data from a socket (as bytes) and storing this data in a string. Then later i need to access specific bytes within the string and do some math with them. However the bytes that I read back from the string are not what I am expecting.
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I need to store data in a grid like this:
{0,1,2,3}
{4,5,6,7}
{8,9,10,11}
{12,13,14,15}
I know I can use multi dimensional arrays, but Is there any easier way to do it? Also I need to get values from it like myData.Item(0,1) would return 1.
I've linked the two using the standard data sourcing method and I now need to use the data that is read in to it on another form. The idea of this is that I'm creating a wage calculator and the employees are stored in a database and can be viewed on a vb form, however, I now need to use the data of their pay/hr to be used on another form to calculate the wage.I have tried to declare a public variable across the two separate forms, and on the button that takes you to the other to set this variable as the contents of the text box which is displaying the pay/hr using the following
Public Class ManageUsers
Public HrlyRate As Decimal 'Declaring global variable to use between forms
'Some other code in between relating to rest of the stuff on the form
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
RatePerHourTextBox.Text = HrlyRate 'Saving private variable to global variable
Calculation.Show()
End Sub
End Class
Then on the other form I have used this code to do the calculation:
Public Class Calculation
Private Sub calculation_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
[code]....
I'm having trouble trying to put together some code for an array. What I'm trying to do is get data entered from a text box and store it in an array.What I then need to do is take the entered data and make it appear in reverse order to what it's been entered and show this.
View 6 RepliesI have propetie get set classes, and a constructor to quickly set them all.The only concern I have is that the byval in the constructor class and the byval in the set() properties, might be inefficient because the parameter is copied twice? Should I use ByRef? Or is that too dangerous?
'Config data for an Environment.
Public Class Environment
Private msEnvName As String
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I'm trying to learn visual basic and i've made my application all work and now I just need to make the listview save data.As far as I know, I can create a database with all the relavent tables in it for each column in the listview. For example in a database, I will have a table that will have four columns because I have a four column listview. Each row must be tied together though.
The other option is to create a text file and use some xml or seperate them with commas. which one should I go with? I'd rather do the database one, but I really have no idea how to go about it.
How can i store data accquired from an Ip address within the LAN into my database?
View 3 RepliesI have a question. I have a asp site that keeps track of inventory. I currently have it as to where any updates to the inventory, an email is sent with the new changes. How can I get it to send the old changes and the new changes. I know I will need to somehow temp store the old values to use them in the email, but I can't figure out how to do it. I don't want to store them in an actual database table.
View 1 Repliesis there any way to keep data stored in an application retrieved from web references like we get data [items] invoked in a listbox from web references and then after publishing it when once exe. is run the data is invoked or retrieved from web references. so that when next time once again exe. is run the retrieved data will be there instead of waiting services to get data.
View 13 RepliesPossible Duplicate: DataGridView - Validating for Cell?i have a requirement. i dont know how to get the data from the datagrid after the user entered data in textboxcolumn. i also want to validate the entered text in datagrid cell.
View 2 RepliesI am making a small tool that require some calculation. I am using hashtable to store values that I need to calculate. This tool continuously extract data on specific time interval(30 seconds) from webpage and add those data into the hashtable. Now the problem is I need to store the previous extraction data and when new extraction occurs, I need to deduct the previous data from new data.
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On first run it shows the result of Data3 = 100 which is currect. But on second run I need to redefine the value of Data2 = Data1 . So I need a result of Data3 = 0 on second run. This may not be the proper way to do this sort of operation. I have also tried using listbox, listview and even textfile to store the Data2 and recall that on second run. But could not make it possible.
This is the last phase of my tool and I am stuck with it.
What SQL Server data type should be used to store RichTextBox text? The reason I ask is because the BOL indicates not to use text or ntext anymore because these data types will be excluded from future versions of SQL Server.
View 4 RepliesI've been searching around these forums for quite a while now, and can't seem to either understand or find what I'm looking for.I have a text file, that my program is always adding to it, it's format is like so:
Line 1: UserName (For User 1)
Line 2: FilePath (For User 1)
Line 3: UserName (For User 2)
[code].....
I basically need to hold a lot of data - the structure is that of a five dimensional array holding integers.What would be the most efficient way of storing this in a file (I was thinking of XML - your opinion?) that would also be quick to extract.
View 3 RepliesI am making a small tool that require some calculation. I am using hashtable to store values that I need to calculate. This tool continuously extract data on specific time interval(30 seconds) from webpage and add those data into the hashtable. Now the problem is I need to store the previous extraction data and when new extraction occurs, I need to deduct the previous data from new data.Here is the process I am currently following:
Dim MyTable as New Hashtable
MyTable.Add("Data1","200")
MyTable.Add("Data2","100")
[code].....
I am using an Access database and vb.net 2010. I have created a table in the database with columns for title, datein, dateout and roomnymber. In vb.net 2010 I made a distinguished title = combobox, datein and dateout = DateTimePicker. When I click on F5, an error occurs: INSERT INTO Syntax Error in statement. [Code]
View 1 RepliesI have a whole bunch of information that has been parsed from a web page and i want to insert the data into a multi-demensional array and the compare the data of a certain array element to another array in the same format to determine which is missing/added.So if i have this:
Type of animal | Color | Age
Cat, Brown, 15
Dog, Pink, 6
Fish, Orange, 4
[code].....
I only want to compare the type of the animal and the color and age is irrelevant.I want it to let me know whats missing and what's been added.Sounds bizarre but yeah. It doesn't need to be arrays, it's the only thing i know of though.
i simple want to store the textbox data into the dataset .after that i want to fill using adapter into the sql server table
View 11 RepliesI have the book "Visual Basic 2008 Step by Step", I am in the final chapters and have completed all of the walk through and demo programs thus far. I am a beginner but I also have a basic understanding of quite a few program statements and objects. My Goal: For the sake of simplicity I will use an example. I have a Tetris game, the player loses in the first level earns 25 points they click the save score button. , they play again tomorrow and do 1,000 levels and earn 25,000, now their score is 25,025.
Then they play my blackjack game, they gain 25,025 points when they start automatically from their Tetris game, they earn 25 points in blackjack click a save score button, now they have 25,050. [Thus far I have 2 games, and they both share a score that will need to be added to in the future]
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There are "text" files, there are databases, I used to use a record (now called a structure) in a ".dat" file, but I'm having trouble finding documentation support in vs2010. So I'm thinking maybe it's time to move up to ... ? databases? ".txt"s? The current app I'm trying to write will only have a couple of hundred "records" at the very most; Old vb6 command like LenB which would return the size of a file in bytes is no longer, and I can't find how len( .."as byte" of file) would actually be implemented. len( <filename>, as byte) isn't the correct syntax - what is?
Is there some thing less dramatic than a full blown database? Or getting used to how a database uses SQL and all that goes along with that shoud be something to get handy with?
I'm working on a project at the moment, where all the data being loaded is kept in an XML file which until now have been rather clean with structures such as
Code:
<Textures>
<Texture id="1">TerraingrassDirtNW.png</Texture>
[code].....