I'm a new programmer and I'm trying to create a small program that will help me finish many things.
How it's looks like?
This is how the text file's data is formatted:
**;======================= Start**
(item (name 256) (Index 1) (Image "Wea001") (Action 1 1) (class
weapon sword) (code 1 1 1 1) (country 2) (level 1) (wear
1) (limit Knight 1) (range 16) (buy 4) (sell 1) (endurance
4) (specialty (aspeed 700) (Attack 3 10) (hit 15) ) )
**;======================== end**
I need to import the (number beside the name), the (number beside the index), and the (name beside the Image).
User will be loading the text file from an open file dialog and the 3 columns will display the 3 fields that I am asking for help with.
Can anybody show me example of code to load text file data, into a datagridview? I am using vb.net
Here's a way that uses the existing format. This uses a datatable to contain the data then it's used as the datasource for the datagridview It searches for the correct line, then splits the line by the closing parenthesis ), then extracts the data by splitting each piece by the space.
Imports System.IO
Public Class Form1
Dim dt As New DataTable
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
Dim sr As New StreamReader("InitItem.txt")
Dim DataString As String = ""
Dim ImageIndex As Integer = 2
dt.Columns.AddRange({New DataColumn("Name"), New DataColumn("Index"), New DataColumn("Image")})
While Not sr.EndOfStream
DataString = sr.ReadLine
If DataString.Contains("(item") Then
Dim ParseData() As String = DataString.Split(")"c)
If (ParseData(ImageIndex).Contains("desc")) Then
ImageIndex = 3
End If
AddNewRow(ParseData, ImageIndex)
End If
End While
DataGridView1.DataSource = dt
End Sub
Private Sub AddNewRow(ParseData() As String, ImageIndex As Integer)
Dim TempRow As DataRow = dt.NewRow
TempRow.ItemArray = {ParseData(0).Trim.Split({" "c}, StringSplitOptions.RemoveEmptyEntries)(1), _
ParseData(1).Trim.Split({" "c}, StringSplitOptions.RemoveEmptyEntries)(1), _
ParseData(ImageIndex).Trim.Split({" "c}, StringSplitOptions.RemoveEmptyEntries)(1).Trim(""""c)}
dt.Rows.Add(TempRow)
End Sub
End Class
Splitting by the ) ensures that when we want to extract the data after we split by the space, that the string doesn't have the ) tacked on to the end.
Because the text file format is kind of all over the place I made this code specifically for the data you requested. If you want something more generic then, as already mentioned, you should consider a more standard format for the file. Since there doesn't seem to be a lot of data, I would suggest a field/value pair on each line.
Related
enter image description hereWrite a program to display 1000 8-character random user IDs in a text box after you click a button. Make sure the program verifies that none of the IDs are identical. Each userid should include a mixture of alphabetic characters and numbers.
What I have so far, which could be enough to get by as a random ID generator alone, but it does not loop 1000 times to be displayed in the label, and doesn't check for repeated ID's.
Public Class Form1
Private Sub btnGenerateRandomID_Click(sender As Object, e As EventArgs) Handles btnGenerateRandomID.Click
Dim rand As New Random
Dim char1 As String
Dim char2 As String
Dim char3 As String
Dim char4 As String
Dim char5 As String
Dim char6 As String
Dim char7 As String
Dim char8 As String
char1 = ChrW(rand.Next(Asc("A"), Asc("Z") + 1))
char2 = ChrW(rand.Next(Asc("A"), Asc("Z") + 1))
char3 = ChrW(rand.Next(Asc("A"), Asc("Z") + 1))
char4 = ChrW(rand.Next(Asc("A"), Asc("Z") + 1))
char5 = rand.Next(0, 9)
char6 = rand.Next(0, 9)
char7 = rand.Next(0, 9)
char8 = rand.Next(0, 9)
lblRandomId.Text = char1 + char2 + char3 + char4 + char5 + char6 + char7 + char8
End Sub
End Class
Thanks.
EDIT:
Public Class Form1
'Write a program to display 1000 8-character random user IDs in a text
'box after you click a button. Make sure the program verifies that none Of the IDs are identical.
'Each userid should include a mixture Of alphabetic characters And numbers.
Private Sub btnGenerateRandomID_Click(sender As Object, e As EventArgs) Handles btnGenerateRandomID.Click
Dim strChar As String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
Dim rand As New Random
Dim strID As String = ""
For count_ids As Integer = 0 To 999
For count_chars As Integer = 0 To 7
strID += strChar(rand.Next(0, 62))
Next count_chars
lblRandomId.Text = strID
Next
End Sub
End Class
Here is the actual question "Q. Write a program to display 1000 8-character random user IDs in a text box after you click a button. Make sure the program verifies that none of the IDs are identical. Each userid should include a mixture of alphabetic characters and numbers.
Explain your program in your essay, with screenshots. Include a paragraph on the random number generator used in Visual Basic, and answer the question: how should the random number generator be best seeded?"
First of all, Welcome to StackOverflow,
From what i understand from your post you want to generate 1000 8 Character long Unique ID's
First of all we declare our variables
Dim Characters As String = "AZERTYUIOPQSDFGHJKLMWXCVBN0123456789" 'Declare All Characters on one string
Dim IDsList As New List(Of String) With {.Capacity = 1000} 'You can limit the capacity to 1000
Dim Id As String = ""
Dim Rand As New Random
Now we begin to genearte ID's and add them to IDsList using a nested loop
For i As Integer = 0 To 999 'This is a Zero Based Index so 999 is actually 1000
For _i As Integer = 0 To 7 'This also means 7 is 8
Id += Characters(Rand.Next(0, 36))
Next
IDsList.Add(Id)
Id = ""
Next
'You can Check for duplicates by adding this piece of code or use the next one instead
Dim NoDupesIDsList As New List(Of String)
NoDupesIDsList = IDsList.Distinct.ToList
For i As Integer = 0 To 999 'This is a Zero Based Index so 999 is actually 1000
For _i As Integer = 0 To 7 'This also means 7 is 8
Id += Characters(Rand.Next(0, 36))
Next
If not IDsList.contains(Id) then
IDsList.Add(Id)
End if
Id = ""
Next
Use a Textbox with multiline and scroll bar for better experience
Feel free to ask me anything via comments
PS: I tested my method and it's working , enjoy it !
This function will return the ASCII characters between 48 an 122. That will include some characters that are not letters or numbers but this makes the ids even more unique and simplifies the code.
The For loop builds the ids with a length of 8. Then the id is checked for uniqueness with the .Contains method. Only if it is not in the list, it is added to the list and the counter is incremented.
Private Rnd As New Random
Private Function GetListOfIDs() As List(Of String)
Dim Counter As Integer
Dim lst As New List(Of String)
Dim id As String = ""
Do While Counter < 1000
id = ""
For i = 0 To 7
id &= Chr(Rnd.Next(48, 123))
Next
If Not lst.Contains(id) Then
lst.Add(id)
Counter += 1
End If
Loop
Return lst
End Function
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim lst = GetListOfIDs()
TextBox1.Text = String.Join(vbCrLf, lst)
End Sub
EDIT
As per suggestion by Caius Jard in comments I have added a solution using a HashSet. Same idea only a HashSet will not accept duplicate entries. The .Add method returns a boolean telling you if the Add was successful.
Private Function GetListOfIDs() As HashSet(Of String)
Dim hs As New HashSet(Of String)
Dim id As String = ""
Do While hs.Count < 1001
id = ""
For i = 0 To 7
id &= Chr(Rnd.Next(48, 123))
Next
If hs.Add(id) Then
Counter += 1
End If
Loop
Return hs
End Function
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim hs = BuildHashSet()
TextBox1.Text = String.Join(vbCrLf, hs)
End Sub
This method is probably more efficient because a HashSet is designed for hight performance. For 1000 items I did not notice any difference in the user interface. The text box updated immediately with both methods.
This will create the names:
Function RandomName(length As Integer) As String
Shared rnd As New Random()
Shared corpus() As Char = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".ToCharArray()
Return New String(Enumerable.Range(0, length).Select(Function(c) corpus(rnd.Next(corpus.Length))).ToArray())
End Function
Iterator Function GetUniqueNames(length As Integer, count As Integer) As IEnumerable(Of String)
Dim names As New HashSet(Of String)
For i As Integer = 0 To count
Dim name As String = RandomName(length)
While names.Contains(name)
'Potential (but unlikely) halting problem
name = RandomName(length)
End While
names.Add(name)
Yield name
Next
End Function
Dim uniqueNames = GetUniqueNames(8, 1000)
But do you really want to display 1000 of them in a single label?
lblRandomId.Text = string.Join(vbCrLf, uniqueNames)
Let's talk about your code.
Dim strChar As String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
This assignment will work in your loop because a String is really an array of Char. This is why you can refer to an index in the string.
Dim rand As New Random()
The .net Random class provides a seed for Random based on system time. Only rarely would you want to provide a seed.
From the docs https://learn.microsoft.com/en-us/dotnet/api/system.random?view=netcore-3.1
CONSTRUCTORS
Random() Initializes a new instance of the Random class
using a default seed value.
Random(Int32) Initializes a new instance of the Random class, using
the specified seed value.
For count_ids As Integer = 0 To 999
A For loop is not appropriate for this problem. We only want to increment the counter if we get a unique ID. The above For loop will increment on every iteration.
Do While Counter < 1000
'Code here
Loop
Notice in my code the counter is only incremented if the ID is unique.
The following loop should work fine but above this code we need to reset strID to an empty string. Otherwise we will have a very long string.
For count_chars As Integer = 0 To 7
strID += strChar(rand.Next(0, 62))
Next count_chars
You should not update the user interface (the label) on each iteration of the loop. Repainting the screen is one of the slowest operations in code. This line will overwrite the string in the label on every iteration.
lblRandomId.Text = strID
Move the update of the UI to after both loops are complete
Your code never checks for duplicates.
Now let's fix it.
We use a List(Of T) to accumulate the IDs. The T stands for Type; in our case it is String. A List is like an array only you don't have to know ahead of time how many entries there will be. No ReDim Preserve required.
Moved Dim strID As String = "" to the beginning of the inner loop so we will get a new strID on each iteration of the outer loop.
Changed strID &= strChar(rand.Next(0, 62)). &= instead of +=. In VB.net we use the ampersand to concatenate strings although the plus sign will work. The .Next method of the Random class has an overload that takes 2 Integers. It is inclusive of the first and exclusive of the second which means (0, 62) will return numbers form 0 to 61. Your string with a length of 62 has indexes of 0 to 61.
Next we check for duplicates with the .Contains method of the List class. This method does just what you would expect. We pass the new ID to the method and it returns a Boolean telling if the string is already in the list.
If it is not in the list, we add it to the list and increment the counter. The counter is only incremented if we have a successful add.
Finally we update the user interface by using a method of the String class. the .Join method takes a separator and the list to join. The TextBox must be multiline and have scroll bars.
I changed the names of the controls so I could test it in my testing program.
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim lst As New List(Of String)
Dim strChar As String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
Dim rand As New Random()
Dim counter As Integer
Do While counter < 1000
Dim strID As String = ""
For count_chars = 0 To 7
strID &= strChar(rand.Next(0, 62))
Next
If Not lst.Contains(strID) Then
lst.Add(strID)
counter += 1
End If
Loop
TextBox1.Text = String.Join(vbCrLf, lst)
End Sub
EDIT
The official documentation for this method can be found here.
https://learn.microsoft.com/en-us/dotnet/api/system.string.join?view=netcore-3.1
I know it will be difficult to read but just take a look. Eventually you will be able to understand it and will be using these docs a lot.
String.Join(separator, List(Of String))
The separator is what to put between the strings in the list. In our case that is vbCrLf which is a vb constant for new line. Cr = Carraiage Return and Lf = Line Feed. Other types of collections that contain strings can also use this method.
The method takes each string in the list and adds the separator. After it is done with the list it returns one long string which we display in the TextBox.
I'm trying to collect data after creating dynamic text-box with vb.net
Private Sub btn_OK_lines_number_Click(sender As Object, e As EventArgs)
Handles btn_OK_lines_number.Click
Dim i As Integer
Dim x As Integer
Dim Z As Integer
Z = 150
If IsNumeric(txt_lines_number.Text) Then
Int32.TryParse(txt_lines_number.Text, x)
For i = 1 To x
Dim newTB As New TextBox
Dim newLB As New Label
newLB.Name = "lbl_workstation_number_line" & i
newLB.Text = "Nbr Work Station in Line" & i
newLB.Size = New Size(190, 20)
newLB.ForeColor = Color.White
newLB.Font = New Font("consolas", 12, FontStyle.Regular, GraphicsUnit.Pixel)
newLB.Location = New Point(20, Z + i * 30)
newTB.Name = "Textbox" & i
newTB.Size = New Size(170, 20)
newTB.Location = New Point(200, Z + i * 30)
Me.Controls.Add(newTB)
Me.Controls.Add(newLB)
Next
i = i + 1
Else
MessageBox.Show("please enter a number")
txt_lines_number.Text = ""
End If
End Sub
Let's say you just have one row, and only create one TextBox. You set the name here:
newTB.Name = "Textbox" & i
where the resulting TextBox is named Textbox1. The problem is you can't just reference the identifier Textbox1 directly in your code, as you do with txt_lines_number. You can't even reference it as a member of the class (Me.Textbox1). This name didn't exist at compile time, and so it's not an identifier you can use, and it's not a member of the class at all. There was never a matching Dim statement for that name.
What you can do, though, is look again in the Controls collection where you added the TextBox to the form:
Me.Controls("Textbox1")
or
Me.Controls("Textbox1").Text
You may also need to cast the value to a TextBox:
Dim box As TextBox = DirectCast(Me.Controls("Textbox1"), TextBox)
MessageBox.Show(box.Text)
Remember that case matters here.
Further saving this in a DB is out of scope for one question. There are as many ways to do that as there are programmers in the world. You should make your own attempt first, and come back here with a new question when you run into specific problems.
Thank you,
this is my attempt and it is done !
Dim userInput As TextBox = Form1.Controls.Item("TextBox" & i.ToString)
mycommand.Parameters.AddWithValue("#workstation", userInput.Text)
:D
Because you creating dynamic amount of input controls, right tool for the job will be DataGridView control.
Create a class to represent your data
Public Class LineInfo
Public Property Number As Integer
Public Property WorkStationNumber As Integer
End Class
Create `DataGridView in the form designer.
Private Sub btn_OK_lines_number_Click(sender As Object, e As EventArgs) Handles btn_OK_lines_number.Click
Dim linesAmount As Integer
If Integer.TryParse(txt_lines_number.Text, linesAmount) = False Then
MessageBox.Show("please enter a number")
txt_lines_number.Text = ""
Exit Sub
End If
' Create class instance for every line
Dim lines =
Enumerable.Range(1, linesAmount)
.Select(Function(i) New LineInfo With { .Number = i })
.ToList()
'Set lines as DataSource to the DataGridView
Me.DataGridView1.DataSource = lines
End Sub
DataGridView will display all lines and provide input fields to update work station numbers.
You can access updated lines later by casting DataSource back to the List
Dim lines = DirectCast(Me.DataGridView1.DataSource, List(Of LineInfo))
' Now you can access all data and save it to the database
Dim parameters =
lines.Select(Function(line)
Return new SqlParameter With
{
.ParameterName = $"#workstation{line.Number}",
.SqlDbType = SqlDbType.Int,
.Value = line.WorkStationNumber
}
End Function)
.ToList()
myCommand.Parameters.AddRange(parameters)
You can freely change style, font colors of different columns in the datagridview.
I use a visual basic program to get information from another program, which we'll call ProgramX.
ProgramX has built in functionality to generate tab-delimited tables, which many users copy over to Excel. My goal(which I've acheived) is to generate and collect upwards of 1,000 of these tables and have the results ready for the user to copy/paste into Excel all at once instead of one at a time. My Dataset keeps the tab-delimited records just as I would like them.
The issue is that when I display my dataset/datatable in my datagridview, all tab characters are removed. When the results are copied/pasted into Excel they take up one column instead of automatically breaking out. I have been using datagridview to preview results/copy to clipboard; Is there any way to retain the tabs in this view?
Expected Result: Result 1 [tab] Result 2 [tab] Result 3
Result in datatable: Result 1 [tab] Result 2 [tab] Result 3
Result in datagridview: Result 1Result 2Result 3
If the only way to achieve this is to copy directly from my datatable, I have seen a few posts on how to accomplish that. Thanks!
You have numerous options available, but in most cases you'll need to perform some looping one way or another - however even with 1000+ records it's performance hardly takes a hit.
So for the first couple of options let's assume I have the following setup - keeping with your one DataGridViewColumn idea:
Me.table = New DataTable()
Me.table.Columns.Add("Data", GetType(String))
For i As Integer = 0 To 999
Dim x As Integer = i * 4
Dim data As String = String.Format("Result {0}" & vbTab & "Result {1}" & vbTab & "Result {2}" & vbTab & "Result {3}", x + 1, x + 2, x + 3, x + 4)
Me.table.Rows.Add(data)
Next
Me.dataGridView1.AllowUserToAddRows = False
Me.dataGridView1.DataSource = Me.table
Possible Solutions
Loop through the DataTable, concatenate the data, and set the clipboard text:
Private Sub button1_Click(sender As Object, e As System.EventArgs) Handles button1.Click
Dim content As String = String.Empty
For Each row As DataRow In Me.table.Rows
content = String.Format("{0}" & vbLf & "{1}", content, row.ItemArray(0).ToString())
Next
content = content.TrimStart(ControlChars.Lf)
Clipboard.SetText(content)
End Sub
Loop through the DataGridView.Rows, concatenate the data, and set the clipboard text:
Private Sub button1_Click(sender As Object, e As System.EventArgs) Handles button1.Click
Dim content As String = String.Empty
For Each row As DataGridViewRow In Me.dataGridView1.Rows
content = String.Format("{0}" & vbLf & "{1}", content, row.Cells(0).Value.ToString())
Next
content = content.TrimStart(ControlChars.Lf)
Clipboard.SetText(content)
End Sub
And to make the grid look a little better for both option 1 and 2, since the display seems to ignore tabs:
Private Sub dataGridView1_CellFormatting(ByVal sender As Object, _
ByVal e As DataGridViewCellFormattingEventArgs) _
Handles dataGridView1.CellFormatting
Dim value As String = e.Value.ToString().Replace(vbTab, " ")
e.Value = value
End Sub
With that your grid might look like:
In addition to the original setup and instead of binding to the original DataTable, split the table's data by the tabs and display them in separate columns:
Dim splitTable As New DataTable()
For Each row As DataRow In Me.table.Rows
Dim splitItems = row.ItemArray(0).ToString().Split(ControlChars.Tab)
For i As Integer = splitTable.Columns.Count To splitItems.Length - 1
splitTable.Columns.Add(String.Empty, GetType(String))
Next
splitTable.Rows.Add(splitItems)
Next
Me.dataGridView1.AllowUserToAddRows = False
Me.dataGridView1.ClipboardCopyMode = DataGridViewClipboardCopyMode.EnableWithoutHeaderText
Me.dataGridView1.DataSource = splitTable
Then you can use the built-in clipboard method for the DataGridView:
Private Sub button1_Click(sender As Object, e As System.EventArgs) Handles button1.Click
Me.dataGridView1.SelectAll()
Clipboard.SetDataObject(Me.dataGridView1.GetClipboardContent())
End Sub
With that your grid might look like:
For all three options, clicking button1 to copy the data and hitting Ctrl+V in Excel will produce:
Note that Wrap Text will be on by default.
Pros:
Options 1 and 2 leave the user-selected cells intact. Option 3 looks better with separated DataGridView columns.
Cons:
Options 1 and 2 can look less clean pending the data. Option 3 selects all cells, losing the user's previous selected cells.
New TechGuy on this site. Thought i'd make this resourceful since im getting ready to graduate and want more programming practice. I have a question:
I tried looping through a text file I created and I wanted to replace each multiple of 3 with the word "changed". I created a text file and entered numbers 1-15 on each line. My code is below but for some reason it would only change the number 3 and 13. I tried using this link as a resource (Loop through the lines of a text file in VB.NET) but that wasnt to helpful. Anyway here is my code, can someone help with what i'm doing wrong?
Public Class numbers
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
Dim OpenFilePrompt As New OpenFileDialog
openFilePrompt.ShowDialog()
Dim currentReader As New System.IO.StreamReader(OpenFilePrompt.FileName)
txtInput.Text = currentReader.ReadToEnd
Dim a As String
Dim numbers As New List(Of String)
a = txtInput.Text
numbers.Add(a)
Dim b As Integer
For i = 0 To numbers.Count Step 3
b = b + 3
TextBox2.Text = (numbers.Item(i).Replace(b.ToString, "Changed"))
Next
End Sub
End Class
You are setting numbers (the first item) to a, which is txtInput.Text.
Then you have a one size list which is completely useless!
You should use Mod instead.
Divides two numbers and returns only the remainder.
So just check if Integer Mod 3 equals 0.
Also consider using File.ReadAllLines(String), Val(String), String.Join(String, String()) and File.WriteAllLines(String, String()).
Dim Content() As String = File.ReadAllLines(OpenFilePrompt.FileName)
For Index As Integer = 0 To Content.Length - 1
Dim Number As Integer = Val(Content(Index))
If Number Mod 3 = 0 Then
Content(Index) = "changed"
End If
Next
txtInput.Text = String.Join(vbCrLf, Content)
File.WriteAllLines(OpenFilePrompt.FileName, Content)
Recently when creating a program for my client as part of my computing project in visual basic .net I've came across a problem, which looks like following; In order to receive additional marks for my program I must take an advantage of either Binary Search or Insertion Sort subroutine declared recursively, so far the only place I can use it on is my View form which displays all reports generated by program but the problem with this is since I'm using MS Access to store my data all of the data is downloaded and placed in listview in load part of form. So the only way I can use it is by running it on listview which is a major problem for me due to the fact that I'm not very experienced in vb.
For binary search I have tried downloading all of the items in specified by user column into an array but that's the bit I was struggling on the most because I'm unable to download all items from only one column into an array. Also instead of searching every single column user specifies in my form in which column item is located (For example "19/02/2013" In Column "Date"), In my opinion if I manage to download every single entry in specified column into an array it should allow me to run binary search later on therefore completing the algorithm. Here's what I've got so far.
Sub BinarySearch(ByVal Key As String, ByVal lowindex As String, ByVal highindex As String, ByVal temp() As String)
Dim midpoint As Integer
If lowindex > highindex Then
MsgBox("Search Failed")
Else
midpoint = (highindex + lowindex) / 2
If temp(midpoint) = Key Then
MsgBox("found at location " & midpoint)
ElseIf Key < temp(midpoint) Then
Call BinarySearch(Key, lowindex, midpoint, temp)
ElseIf Key > temp(midpoint) Then
Call BinarySearch(Key, midpoint, highindex, temp)
End If
End If
End Sub
Private Sub btnSearch_Click(sender As System.Object, e As System.EventArgs) Handles btnSearch.Click
Dim Key As String = txtSearch.Text
Dim TargetColumn As String = Me.lstOutput.Columns(cmbColumns.Text).Index
Dim lowindex As Integer = 0
Dim highindex As Integer = lstOutput.Items.Count - 1
'Somehow all of the items in Target column must be placed in temp array
Dim temp(Me.lstOutput.Items.Count - 1) As String
' BinarySearch(Key, lowindex, highindex, temp)
End Sub
For Insertion sort i don't even have a clue how to start, and the thing is that I have to use my own subroutine instead of calling system libraries which will do it for me.
Code which I have to use looks like following:
Private Sub InsertionSort()
Dim First As Integer = 1
Dim Last As Integer = Me.lstOutput.
Dim CurrentPtr, CurrentValue, Ptr As Integer
For CurrentPtr = First + 1 To Last
CurrentValue = A(CurrentPtr)
Ptr = CurrentPtr - 1
While A(Ptr) > CurrentValue And Ptr > 0
A(Ptr + 1) = A(Ptr)
Ptr -= 1
End While
A(Ptr + 1) = CurrentValue
Next
Timer1.Enabled = False
lblTime.Text = tick.ToString
End Sub
Any ideas on how to implement this code will be very appreciated, and please keep in my mind that I'm not very experienced in this language
Perhaps this might give you a place to begin. If you already have a ListView with "stuff" in it you could add a button to the form with the following code to copy the Text property for each item into an array:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim myArray(Me.ListView1.Items.Count - 1) As String
Dim i As Integer
' load array
For i = 0 To Me.ListView1.Items.Count - 1
myArray(i) = Me.ListView1.Items(i).Text
Next
' show the results
Dim s As String = ""
For i = 0 To UBound(myArray)
s &= String.Format("myArray({0}): {1}", i, myArray(i)) & vbCrLf
Next
MsgBox(s, MsgBoxStyle.Information, "myArray Contents")
' now go ahead and manipulate the array as needed
' ...
End Sub