VS 2008 - Storing / Using Numeric Data
Oct 20, 2009
I 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]
[Code]...
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Jan 12, 2012
is 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.
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Dec 11, 2010
I 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:
HTML
Dim MyTable as New Hashtable
MyTable.Add("Data1","200")
MyTable.Add("Data2","100")
[code]....
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.
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Nov 5, 2009
My application check a valid license key using Select...Case,for each user I have a Case statement.This way I can easily remove a user from next versions of my app.If I use a external data file, my app can be easily hacked,exe can be replaced etc,but using all inside exe seems to be more secure,but Select...Case statement will grow so I'm looking for a way to store white list - keys inside my exe.
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Mar 16, 2010
I'm trying to add functionality to my application to let user define "custom actions" in one of the context menus.Essentially, these would be command lines that can be executed against remote machines.I've got the code to add the menu items working but I'm not sure of the best of storing the data related to the menu items. At the moment I'm using a Specialized.StringCollection in the project settings but this only allows me to store a single line (i.e. the command line).This means that the text of the menu items is whatever command line the user has defined (not ideal).What I would like is to have a "friendly" name for the menu item (e.g. Start Notepad) and have that associated to notepad.exe.What's a good way to store this data so that I best dynamically build the menu items every time?
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Sep 3, 2009
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)?
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Nov 16, 2009
I have a simple multithread application that stores updated data from a list of websites. After each thread gathers data, it then store the data into the same text file. I am now thinking of having each thread store the data directly into a arrayList, and after a certain amount of time past, store from the arrayList to the text file. Which situation would enable the application to complete its task faster?
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Oct 24, 2009
In a resource string, not one that you declare in the code, but rather in the resources itself, how do I store multiple pieces of data in it?
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Jan 22, 2010
I am reading a data file and storing them in an array of string.Data is random, could be like "1","2","133,18" but sometimes there can be missing values like "?".Once I load the data in the array, I want to check if at least a majority (like 60% of them) are numeric values.If yes, then I wanna track down the higher and lowest value in the array, and output a range of 5.Loop through the array
If 60% of them are numbers (integers or decimals) then find highest value, find lowest value end if produce range
If for example lowest = 1 and highest = 100, range of 5 means 0,20,40,60,80,100 (so 5 ranges are 0-20, 20-40, 40-60, 60-80, 80-100).Also if the ranges turn to have decimals due to weird numbers, I would like to round them up.My problem is, in order to find highest and lowest when there are non numeric values in the array like "?", how should I handle those? I was thinking of something like Double.NaN but I would have to have an array of doubles.
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Nov 29, 2009
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.
[Code]...
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Apr 6, 2012
Is there a numeric text box, not an up-down box, a SIMPLE numeric box into which the user can place a number, 5 boxes actually, then on command have the five boxes added and the sum displayed?
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Sep 17, 2009
I have a textbox field which when I save ,if the field has a Non Numeric Data throws an error message.How to fix this ?
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Jun 2, 2011
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.
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May 2, 2011
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]....
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May 15, 2009
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.
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Apr 22, 2011
storing 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).
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Apr 25, 2012
I 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
[code].....
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Jun 23, 2011
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.
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Jul 5, 2010
How can i store data accquired from an Ip address within the LAN into my database?
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Mar 23, 2011
I 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.
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Jun 5, 2012
So I know ("C") converts it to currency, but when I do that I get "Expression is not an array or method, and cannot have an argument list."[code]...
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May 10, 2010
i have finished my code and the program works but i need setup a few error messages incase a user inputs invalid data (non numeric, and negative numbers)i keep getting both errors at the same time when i input a negative or non numeric data. My program allows a user to calculate cell phone bill
[Code]...
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Nov 23, 2009
I have a field in a sql table that is of datatype numeric(9,0).I have a time field on my input screen that is type textbox.I want to insert the time (which is type text) into the numeric field of my table. Do I need to parse this data somehow? Or will it just work as a text field? How would I do that?
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Jan 23, 2012
I have a bound Datagridview with a column Quantity in which I want to enter numbers but dont want the user to type a decimal. E.g. 100 should be allowed, however 100.23 should not be allowed.Have set the DefaultCellStyle property of this column to
DataGridViewCellStyle { Format=N0 }
AND
Also in my Form Load event i have entered below code:
Me.DataGridViewTblInvoiceDetailsAndTblTempInvoiceDetails.Columns(2).DefaultCellStyle.Format
= "N0"[code].....
However this is not working.When I run the program it is allowing me to enter decimal values.
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Mar 29, 2011
Is there a way to transfer numeric data from one form to another?
For instance: form1 textbox1.text = form2 textbox3.text and i would like to add it to the number already in form2 textbox3.text. Is that to much to expect...I am very new to .net
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Dec 13, 2010
I 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.
[Code]...
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.
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Jan 22, 2011
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.
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Jan 15, 2012
I'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].....
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Apr 23, 2009
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.
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Dec 25, 2009
I 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].....
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