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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Mar 15, 2012
In the following code (Class & Form1), I'm trying to figure out the following:
- Create an array that stores the 'Clients' (first name, last name, account number)
- 'Button List' the array with the (First Name , Last Name , Array Value , Account Balance) [code]
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Jun 8, 2009
I have an array of filenames, and an array of files in a directory. I use a for loop in a for loop to check if those files are in that directory. Look at the below code to illustrate my problem. [code]
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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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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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Jul 22, 2011
How can I take recorded coordinates (x,y) and place them into an array? I have the variables set up and everything, but I am unsure how to declare the array for this purpose and how to take what I have in the array and graph the coordinates later on.
Here is the relevant
vb.net
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
TextBox1.Text = TextBox1.Text + 1
[Code].....
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Oct 17, 2010
How to place units and their men on the form but I cant seem to get this array to work. It has multiple errors in it.
Dim pic(calctroops()) As New PictureBox
Dim z As Integer = 15
For i = 0 To Form3.orcunits
For x = 1 To Form3.orc(orcunits)
z = z + 15
pic(i).Location = New Point(Orc1.x + z, Orc1.y)
pic(i).BackColor = Color.Green
Me.Controls.Add(pic(i))
Next x
Next i
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Feb 23, 2010
Is there a built-in way to multiply every member of an array by some number in-place?
Example:
Dim volts () as Double = {1.243, 0.534, 5.343, 2.223, 4.334}
Dim millivolts (4) as Double = volts.MultiplyEachBy(1000) 'something like this
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Jan 30, 2010
I'm having problems regarding using arrays on object names. for example, i have a textbox named txtBox1.text and a array declared as a(2). I what to transfer the value of the textbox to the array using loop.[code]
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Oct 31, 2009
What i'm trying to do is to open a dialog box which from there i will be able to select files and their names will go into an array.
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Apr 13, 2011
I want to store value in array, from my database. I am using following code but it return error: "Object reference not set to an instance of an object."[code...]
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Apr 11, 2011
I created a custom class for a custom object. I instantiate like so[code]...
Now, I have two problems. First, right now this is just overwriting the same object properties, again, and again. I need to somehow dynamically name the object. Then, I need to place these objects in an array so I can iterate through them...
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Mar 5, 2012
I m trying to write a program that is mostly dynamic. This program enables the user to read in several inputs (temperature, pressure .) and perform calculations on those inputs. After that the program sends an integer to an analogue output port. The program automatically determines the number and type of the inputs. It also creates something called a variable handle for each input.This is then saved to an array input_handler(0,x). That array is sized this way input_handler(0 to 1 , 0 to 9)
0= handle (integer)
1= value (integer)
The program dynamically creates a button for every input. There also is a button for every mathematical operator. This way the user can create a function by pressing buttons.This function will be saved to a string. That string will look something like this input_handler(1,0)+ input_handler(1,4)/ input_handler(1,3)Well now Im stuck with a string and VB will obviously just print out that string instead of calculating anything. Is there any conversion I can perform so that string becomes the actual array values?
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Jun 28, 2010
How can i add an array on names in a list box And be able to add and delet name in a listbox ps sence i just fond out .net cant mke control array ill use listbox with an array of names in it
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Jul 8, 2010
In one program i'm making, I have a little problem.In this application I have 25 button, wich I must have enable or disable everytime.How can I sned a part of name of the button? For example, if I have one array with the values:[bt1, bt2, bt3, bt4, bt5....] witch is the name of each control.Is possible someting similar this? :
array(1).enabled=true
button & array(2).enabled=true
etc...
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Jun 1, 2009
I've come up with the following and it's partly working.
Public serial1, serial2, serial3, serial4, serial5 As SerialPort
Public serialports() As Object = New Object() {serial1, serial2, serial3, serial4, serial5}
dComPort = "COM4"[code]....
The above code works fine! But im having trouble trying to now retreive whats stored in the array.In the above example, an entry will be stored in serialports(4), all other array elements will be blank.If I do this it works.
MsgBox(serialports(4).PortName) ' this retuns the value COM4
But I'd like to loop though all array elements and print out ALL the PortNames, The below code doesnt work, I get an error Object variable or With block variable not set.
For i = 0 To serialports.Length - 1
MsgBox(serialports(i).portname)
Next
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Jun 19, 2009
I'm trying to sort an array based on a structure but whenever I do this, it basically erases all the data in the entire array.I have verified that the array is populated correctly, it is when using array.sort that everything returns blank.
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Nov 10, 2009
initialize an indefinite (eg. Decimal) array without setting boundaries on the array length?
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Jun 14, 2011
I didn't think it fair to post a comment on Fredrik Mörk's answer in this 2 year old post, so I thought I'd just ask it as a new question instead..NB: This is not a critiscm of the answer in any way, I'm simply trying to understand this all before delving into memory management / the marshal class.
In that answer, the function GetByteArray allocates memory to each object within the given array, within a loop.Would the GetByteArray function on the aforementioned post have benefited at all from allocating memory for the total size of the provided array:
Dim arrayBufferPtr = Marshal.AllocHGlobal(Marshal.SizeOf(<arrayElement>) * <array>.Count)
I just wonder if allocating the memory, as shown in the answer, causes any kind of fragmentation? Assuming there may be fragmentation, would there be much of an impact to be concerned with? Would allocating the memory in the way I've shown force you to call IntPtr.ToInt## to obtain pointer offsets from the overall allocation pointer, and therefore force you to check the underlying architecture to ensure the correct method is used*1 or is there a better way? (ToInt32/ToInt64 depending on x86/64?)
*1 I read elsewhere that calling the wrong IntPtr.ToInt## will cause overflow exceptions. What I mean by that statement is would I use:
Dim anOffsetPtr As New IntPtr(arrayBufferPtr.ToInt## + (loopIndex * <arrayElementSize>))
I've read through a few articles on the VB.Net Marshal class and memory allocation; listed below, but if you know fo any other good articles I'm all ears![URL]..
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Dec 12, 2010
Per this UserControl that can be added to a blank form, I would like to use the HorizUnits array below to map custom grid x coordinate from a mouse x position.For a given input value 13, what syntax would I use to obtain a value of 2 where 13 lies between Value 10 and 16 for which 2 (Name) would be the custom grid's displayed coordinate position?
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Mar 12, 2012
I have a 2d array of data that I have performed the sum of the individual column of the 2d array. I want to send the results to a datagridview and also will like to have the result as a 1d or 2d array.
Below is sample of my code
Dim Array1(,) as double
Array1(0, 0) = 5
Array1(0, 1) = 7
[code].....
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Nov 27, 2009
Can I save an array into my .bin file then read the array again just like a string or Integer??
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Jun 23, 2011
n my project i am to enter a name and a test mark into two separate text boxes and then select the button to store the information into the arrays, one array for names and another for marks, but when it is reset using the Erase <Array> fuction andi try to re enter information, no matter what information is entered i get a "Null Reference Exception Unhandled" Error.I am using Visual Basic 2008.My code is as it says from now:
Public Class frmAdverageTestMarkCalculator
Dim ClosingMsg As String
Dim Closingtitle As String
[code].....
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Dec 7, 2010
I am writing a pizza order program for class and have gotten everything put together, even got my array setup and displaying but when i go to calculate it will not calculate the values coming from the array in any of the calculations.
[highlight="vb"]Option Strict On Public Class Form1 'declare structure and module-level variables Structure PizzaSale Dim SizaString As String Dim StyleString As Stri]
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Apr 13, 2012
I'm using the following code to read in a highscores file with the score written first and the player's name written to the next line, and then display the top 3 scores or fewer if there aren't 3 scores written to the file. A highscores display should have the scores sorted with the highest first so that's what this program tries to implement.
Array.sort() isn't doing a damn thing. In fact, the program's not even reversing the arrays like it should either. I've tested array.sort() this way with the names and scores arrays given explicitly and it works fine. I thought maybe it was still reading the data as string even though it's declared otherwise but it rounds off decimals when I change the array type to Integer so I'm pretty sure it's not that.
I have no idea why reading the data in from a file changes how it's sorted. My teacher didn't understand what was going on either. Does anyone know what's going on here?
Imports System.IO
Public Class Form2
Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
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Apr 19, 2011
Can this be rewritten any better using LINQ? I'm a C#er trying to think in VB.NET for this current project. It's in an ASP.NET Web Forms .vb codebehind:
Public ReadOnly Property AllowedCategoryIds As Integer()
Get
Dim ids = New List(Of Integer)
[Code]....
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Apr 9, 2010
I want to compare two array and save the miss match character into 3rd array.
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Jun 22, 2010
A c# class's single dimension byte array contains socket level instrument sensor data as per:
public static byte[] frameData
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Mar 20, 2011
I have a Comma Separated value file in .txt format... simply put, its a bunch of data delimited by commas and text qualifier is separated with ""For example:
"So and so","1234","Blah Blah", "Foo","Bar","","","",""
"foofoo","barbar","etc.."
Where ever there is a carriage return it signifies a new row and every comma separates a new column from another.My next step is to go into VB.net and create an array using these values and having the commas serve as the delimeter and somehow making the array into a table where the text files' format matches the array After that array has been created, I need to select only certain parts of that array and store the value into a variable for later use.... how to make the array and selecting the certain info out of it..
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Nov 23, 2010
Assume I have an array myArray1 = { A, B, C, D, E, F, ., T}I have another that contains a subset of the elements of myArray1 but where the order may vary
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