Store Calculated Values Into An Array?

Mar 8, 2011

I am attempting to teach myself visual basic and I cannot figure out how to send a calculated value (on a button click) into a one-dimension array and then recall the last five values in a message box when the user exits.

Here's what I have:

Public Class frmInvoiceTotal
Dim totals(4) As Decimal
Private Sub btnCalculate_Click(ByVal sender As System.Object,

[Code]....

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Store Values To Array?

Mar 25, 2010

I am trying to create a "Generate Number" application. It needs to generate numbers ( 1 - 100 ) and add them to the array. I have the numbers generated already and outputed into a list box. but I am not sure on how to add them to the array.

I have generated the numbers using for...next and do while loops. But I haven't been able to get the right syntax to be able to add the numbers into the array. [code]/...

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Enum Or Array - Store The Values

Jul 5, 2009

I have the following code which obtains the compass direction from a degree value. I'm new to VB.Net and was wondering what is the best way to store the values, in an Enum or an Array?

[Code]...

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How To Store Values In Byte Array

Mar 29, 2009

I'm trying to convert old code to VB in VS2005. The code I'm working on is used to store values in a string, which will then be handed to a proprietary scramble function. This function is a given in this case. I've already switched from a string to an array of bytes in my .NET code.

The old code (VBA) was using a string value to store the data, example function for Double value:
Private Function DoubleToStr(ByVal value As Double) As String
Dim Bytes(7) As Byte ' 0-7 Double is 8 bytes
Dim n As Long
CopyMemory(Bytes(0), value, 8)
DoubleToStr = ""
For n = 0 To UBound(Bytes)
DoubleToStr = DoubleToStr & Chr(Bytes(n))
Next n
End Function

The code basically copies the memory contents (using API call CopyMemory) of the memory (held by the double variable) to the memory held by a byte array. It then reads the byte array and converts it into a string. Workarounds could be to convert a bool or long to a string, though that would be expensive in terms of memory/storage eg. 1234564787 would be 10 bytes in a string where as a long is only 4 bytes (factor 2.5 increase).

How to retain the original precision? Converting it to a string would result in endless numbers. Another problem (at least I think it could be) is that in VBA the variables are rather simple, but in .NET they are all objects, so how to retrieve the actual memory location of the value? let alone garbage collection moving stuff around. How to get those variables stored in my byte array?

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Store Database Values In Array?

Apr 4, 2009

I have a code which retrieves values from database

[Code]....

i want to store all the values in a array for further processing.

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Using An Array To Store The Inputted Values?

Sep 13, 2010

I am a beginner at VB.net programming. this score calculator. The application is suppose to total up a sum of numbers added, show the count, and an average of the numbers inputted. I try using an array to store the inputted values. Now I'm have issues with my loop keeping track of the total. Also, how do I clear out the array to start over?

[Code]...

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Cannot Store Retrieved Values From Database To Array

Mar 21, 2011

is that instead of receiving data from one row and assigning it to the same array Im receiving data from multiple rows, but the information is the same because its from the same one column from the database. The error I keep getting is 'index out of bounds of array'

here is the code

What it does is it loops through once and retrieves the first value from the db then it throw the exception when it goes to retrieve the second value.

Dim qBkNum As String = "SELECT BookingNum FROM Bookings WHERE BookingID = '1'"
Dim bkNum(5) As String
Try

[Code].....

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Using The Button Store (btnStore) The Values Are Perfectly Assigned To The Array?

Jul 24, 2009

In my example, i use a class array to which I assign values looping through textboxes in my form. Using the button Store (btnStore) the values are perfectly assigned to the array (i use an msgbox to check).The problem is that when i created another button (btnTest) to test if these values can be read outside the btnstore code, I get an error (NullReferenceException unhandled) which informs me to use the new keyword (cannot be used with arrays).I suppose the same applies when trying to access the array from another form. The question is how can i assign the values to the array "forever" and be accessed from "everywhere" in my program ?(tried public, friend, redim preserve the array with no luck).

[Code]...

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Multi-Dimensional Arrays - Code To Set Array Values And Store Them In A Variable

Aug 7, 2010

I have this code to set array values and store them in a variable,

Dim productName As String()
Dim productPrice As String()
Dim productCategory As String()

[CODE]...

How do you get the variable values to output like this?

<input type="text" value="Chang Beverages $19.00" id="Chang" /><br />
<input type="text" value="Ipoh Coffee Beverages $46.00" id="Ipoh Coffee" /><br />
<input type="text" value="Gula Malacca Condiments $19.45" id="Gula Malacca" /><br />

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Cannot Get Listbox To Display Calculated Values For Each Integer Along Way

Mar 22, 2011

I am working with a future value application and I am trying to display the calculated future values in a listbox. For instance, I input the monthly investment, the yearly interest rate and the number of years into textboxes and I want the application to list out the future value for each year until the number of years in which I entered is reached. I cannot figure out how to get the code to display the value after each year. I am trying to use the "mod" operator to display the value each time the 12th month comes around.[code]...

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Plot A Graph From Values Calculated From A Database?

Apr 19, 2011

ive been struggling on this portion of my code for almost 3 days with no luck. i have a database containing a list of transactions (in this case, the product name, quantity and date of sale). I want to plot a graph for each product showing the amount sold each month for the past 12 months. The functions to calculate these values are working fine. but my problem is this:

each tab page is named after the product name:

TabControl_SaleOfProducts.TabPages.Add(
"TabPage_"
& ProductName, Item)

and then to this tab page i want to add the graph. but i cannot reference the newly created tab page?

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Display Calculated Results Of Textbox Values Into Summary?

Apr 3, 2012

I'm trying to learn vb .net. Below is my code, and all I want to do is display the calculated results in a summary. Whether it be a message box or a different form it really doesn't matter.

Public Class Form1
'Global Declarations.
Const STEREOSYSTEM_Decimal As Decimal = 425.76D
Const LEATHERINTIERIOR_Decimal As Decimal = 987.41D
Const COMPUTERNAVIGATION_Decimal As Decimal = 1741.23D
[Code] .....

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VS 2010 OleDB Updating Multiple Records With Calculated Values

May 23, 2012

I'm writing a time entry program to record when an employee checks in and when they check out.I'm struggling on the part where I need to calculate a time span (time out / time in). I am selecting the In Time, Out Time, and Total columns.I want it to take the Out Time subtract it from the In Time and place that value in the Total column.I have so far and have tried several variations of different updates but have had no luck.[code]I keep getting a syntax error in the UPDATE statment.I'm not very fluent with OleDB yet and I'm not sure if I'm doing the update correctly.I have no problem with OleDB and single UPDATES or single field updates but when I am updating multiple rows with different values.

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Seaching An Array - Store In A 1d Array A Set Of 5 Place Names And In 2d Array The Distances Between Places

Jul 28, 2010

I am trying to create the following program Store in a 1d array a set of 5 place names and in a 2d array the distances between the places. Ensure that the order of the places is the same in both arrays. When the names are places are input the distance between them is displayed. If they are not both in the table a suitable message is displayed

Dim town(1 To 5) As String

Dim Dist(1 To 5, 1 To 5) As Integer

Dim First As Integer

[CODE]......................

I think the best way forward is pass a parameter to the function findnumber.

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Generic Class Array - Reading In A Excel File And Extract Data To Store In A Array

Sep 9, 2010

I want to reading in a excel file and extract the sCodenumber sDescription ans the sStatus and store them in a array : StatusComposeArray(5200) As MyCompose. After this I need this array for comparing outside this class. But as can you see the array is defined inside the sub: ReadingIn_ExcelFilesCompose [Code]

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VS 2010 : Copy This Array To A Temp Array So That The Temp Array Has All The Same Values As The Original Custom Array?

Jun 19, 2011

I have an array of people stored in a custom structure array... how can i copy this array to a temp array so that the temp array has all the same values as the original custom array?

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Store 5 Values And An Associated Unique Key?

Jan 9, 2012

I am trying to store 5 values and an associated unique key. I need to search for this key and update the 5 associated values. I'm guessing I would use an object as the value but how do I get the values out from the object?

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Export Values From Array Into Excel And Import Scatterplot Of Values?

Mar 28, 2011

I am creating a maths programs that draws graphs for the user. so far i have placed 22 values into an array and now i need to import them to excel, draw the graph and import the graph back into the program to display them.[code]...

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How To Find Repeated Values In One Dimensional Array And Change The Values

Jul 14, 2009

I am using Visual Basic express edition 2008.I am trying to know if a value in a single dimensional array is repeated in the array. If yes, then multiply one of them by 100. For example:

MyArray (14) = 12, 15, 18, 15, 18, 11, 15, 18, 16, 14, 18, 8, 12, 17, 10
In the above example:
MyArray (1) = MyArray (3) = MyArray (6) = 15
MyArray (2) = MyArray (4) = MyArray (7) = MyArray (10) = 18
MyArray (0) = MyArray (12) = 12

[Code]...

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Access - Store Different Data Values?

Apr 22, 2010

I don't know if I can have several same forms to do the manager jobs, ACTUALLY THE STORE VALUES ARE DIFFERENT(those forms can have the independant data values to store into the forms), like if I can have the datagridviews to store the different values? SO,MY QUESTION IS if I can have several same forms(FROM ONE SAME FORM), and can store different data values into the forms with vb.net & access, OR I HAVE TO CREATE SEVERAL SAME FORMS.

[Code]...

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Select Statement To Store Values?

Jul 19, 2011

Here is my select stament to store values when username and password and check boxes are check

com =
New OleDbCommand("INSERT
INTO Users (UserName,Password,IsAdmin,Read,Write,Change,REMOVE,User_st) VALUES ('" & txtusername.Text &
"','" & txtpassword.Text &
"'," &
CInt(chkIsadmin.Checked) &

[Code]...

My problem is this wehen i add new record to my db it saves values like this the value of read column is as follows read = 1 when check box is checked and read = 0 when check box is checked but i want to save true or false instead 1 and 0 how to achieve this using vb.net and my db is Oracle.

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Store And Retrieve Values From Web.config?

Apr 24, 2009

I built a small website and there will be only one admin, so in the admin panel I am asking for a password with a value that I do not retrieve from a database, I just hard coded it in the function in code behind, I know this is wrong though I don't know why.

So is hard coding it in web.config the right thing to do? and how?

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Store Retrieved DB Values In Variables?

May 31, 2010

I have a database in my app which loads and displays some information on a form by binding the Comboboxes and Textboxes. However, I need to get some of the other values from the database for calculations before they are displayed on the form and I can't seem to find out how to do this.I could bind a couple of Textboxes to the database and then use those values to calculate, but it doesn't seem like a very efficient way of doing things.The dataset is created using the wizard and the controls are linked in the UI.

Please bear with me, I'm still a noob.

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Store Variable Values Between Forms?

Jul 12, 2010

My application sends information from Form1 to Form2 by means of a global variable on Form1 whose value is read by Form2.

This variable is basically used to tell Form2 what it has to do because it's value will change depending on different conditions.

All form2 is meant to do is load data from a database into DataSets which will "ported" to Form1 (the main form) for consumption. I use a Form for this rather than a class because there's a lot of data that will be loaded each time it's visible and I wanted[code]...

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Using A Rich Text Box To Store 10 Values?

Apr 8, 2009

I have a rich text box and i want to enter 10 values and I want to use this button I have to store it. How can I do this? Or can anyone link me to the Microsoft site with information about this? (this is visual basic in Visual studio 2008)

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VS 2008 Store / Remember Certain Values?

Jul 18, 2009

Using VB express 2008 here. I am just wondering about the best way to store certain values like the last browsed folder even if a user closes the app and starts it again. I dont want to go the route of making a text file in the installation directory and storing the values there. Seems clunky.

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VS 2010 - Best Ways To Store Values?

Oct 11, 2009

I want to store say like 8 values, that in the end will be combined into one string. What's the best way to store them? They should be reached in a own namespace I did. In a separate .vb file. I want to able to edit them. The values are both text and numbers. So whats the best way according to you?

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VS 2010 Combobox Store Values?

Feb 18, 2012

i think its hard to explain, but here we go.I have a combobox, where you should be able to add item (in this case colors/Hexcode selected from colordialog).So lets say we have 3 items in that combobox:and if you pick blue, the color blue should apper in a background color.I can only get names to work, but i cant find out how to store the hex value data.

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Assign Different Values To Existing Values Of 2 Dimensional Array?

Apr 4, 2010

I have an array of 10 x 10 as shown below. In addition to -1, it consists of numbers from 1 to 9.[code]...

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Cast Integer Values To An Array Of Enum Values?

Jan 2, 2009

cast integer values to an array of enum values?

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