Storing And Calculating Data Into Hashtable?
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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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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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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Dec 3, 2007
how to save hashtable object to data or text file like (sample.dat or sample.txt)
i got this class Name Book.
[code...]
if i run this application it works, but if i close the application the hashtable items will be erase.i want to save the items to dat file or txt file.i got some idea but it doesnt work, i use the file stream :[code...]
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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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Oct 5, 2010
The Question sound like this.Assume the theater keep 20% of its box office receipts. Use the Following test data to determine if the Application is calculating properly :
[Code]...
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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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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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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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Nov 27, 2010
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]
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Oct 15, 2011
I 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.
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Jun 20, 2012
i simple want to store the textbox data into the dataset .after that i want to fill using adapter into the sql server table
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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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Dec 28, 2010
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?
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Jul 22, 2009
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].....
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Feb 13, 2010
What is the most appropriate data type for storing currency values in VB.NET?
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Feb 6, 2012
I 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?
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Jul 21, 2011
What is the easiest method of storing data and retrieving it using VB? FYI, I have not used Access before. It will be a movie database that stores title genre, etc. I thought about using a text file but i think thats crude and ran across this site:
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May 16, 2010
I will need to store 3 tables of data. Instead of implementing an entire database backend, I just want to store the record for these tables in application.settings.I don't care about security. Is it advisable to do it with application settings? how else would you do it? Perhaps storing a matrix in application.settings would be OK?
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Sep 5, 2009
what is alternative way for storing data if connection of database fail in vb.net application
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Aug 9, 2011
I am about to develop an application in vb.net 2010, until now I used to connect to database server to manage my data . Now i need to develope an .exe which could run in any pc, so I need somehow to store the data in a local database which is embedded to my application, I see .NET has a local database. My question is a right choice to use a local database for these kind of solutions?
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