I have a program that I can enter in names and integer values in the text boxes and then save those to a file. That works perfectly fine but the part I need help with is the reading of the file.
The data is saved into the file much like a csv file. example:
Test, 5, 5, 5
dadea, 5, 5, 5
das, 5, 5, 5
asd, 5, 5, 5
dsadasd, 5, 5, 5
My problem is, how do I read that into multiple text boxes on my form?
The names (first value of each row) should go into their corresponding Name textbox (i.e. txtName0, txtName1, txtName2, etc.) and the integer values should also go into their corresponding text boxes (txtCut1, txtColour1, etc.).
I have spent the past 2 hours trying to figure this out but I just cant.
The part I need help with is the last method.
Imports System.IO
Public Class Form1
Private aPricesGrid(,) As TextBox
Private aAverages() As TextBox
Private aNames() As TextBox
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
aPricesGrid = {{txtCut1, txtColour1, txtUpDo1, txtHighlight1, txtExtensions1},
{txtCut2, txtColour2, txtUpDo2, txtHighlight2, txtExtensions2},
{txtCut3, txtColour3, txtUpDo3, txtHighlight3, txtExtensions3},
{txtCut4, txtColour4, txtUpDo4, txtBHighlight4, txtExtensions4},
{txtCut5, txtColour5, txtUpDo5, txtHighlight5, txtExtensions5}}
aAverages = {txtAvg0, txtAvg1, txtAvg2, txtAvg3, txtAvg4}
aNames = {txtName0, txtName1, txtName2, txtName3, txtName4}
End Sub
Private Sub btnCalculate_Click(sender As Object, e As EventArgs) Handles btnCalculate.Click
For nCol As Integer = 0 To 4
Dim nColTotal As Integer = 0
Dim nColItems As Integer = 0
For nRow As Integer = 0 To 2
Try
nColTotal += aPricesGrid(nRow, nCol).Text
nColItems += 1
Catch ex As Exception
End Try
Next
aAverages(nCol).Text = (nColTotal / nColItems).ToString("c")
Next
End Sub
Private Sub btnClear_Click(sender As Object, e As EventArgs) Handles btnClear.Click
For Each txt As Control In Me.Controls
If TypeOf txt Is TextBox Then
txt.Text = String.Empty
End If
Next
End Sub
Private Sub SaveToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles SaveToolStripMenuItem.Click
Dim oSaveFileDialog As New SaveFileDialog()
'Display the Common file Dialopg to user
oSaveFileDialog.Filter = "Text Files (*.txt)|*.txt"
If oSaveFileDialog.ShowDialog() = Windows.Forms.DialogResult.OK Then
' Retrieve Name and open it
Dim fileName As String = oSaveFileDialog.FileName
Dim outputFile As StreamWriter = File.CreateText(fileName)
For nRow As Integer = 0 To 4
outputFile.Write(aNames(nRow).Text)
For nCol As Integer = 0 To 2
outputFile.Write(", " & aPricesGrid(nRow, nCol).Text)
Next
outputFile.WriteLine()
Next
outputFile.Close()
End If
End Sub
Private Sub btnExit_Click(sender As Object, e As EventArgs) Handles btnExit.Click
Me.Close()
End Sub
Private Sub ReadToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles ReadToolStripMenuItem.Click
Dim oOpenFileDialog As New OpenFileDialog()
'Display the Common file Dialopg to user
oOpenFileDialog.Filter = "Text Files (*.txt)|*.txt"
If oOpenFileDialog.ShowDialog() = Windows.Forms.DialogResult.OK Then
Dim fileName As String = oOpenFileDialog.FileName
Dim OpenFile As StreamReader = File.OpenText(fileName)
End If
End Sub
End Class
Try this method.
Dim mindex as integer
Dim string1 as string()
Dim OpenFile As StreamReader = File.OpenText(fileName)
While OpenFile .Peek <> -1
string1= OpenFile .ReadLine.Split(",")
If mindex = 0 Then
txtname1.text=string1(0)
txtcut1.text=string1(1)
txtcolour1.text=string1(2)
'add other textboxes
ElseIf mindex = 1 Then
txtname2.text=string1(0)
txtcut2.text=string1(1)
txtcolour2.text=string1(2)
'add other textboxes
ElseIf mindex = 2 Then
txtname3.text=string1(0)
txtcut3.text=string1(1)
txtcolour3.text=string1(2)
'add other textboxes
ElseIf mindex = 3 Then
'your code
ElseIf mindex = 4 Then
'your code
End If
mindex += 1
End While
OpenFile .Close()
hope this helps.
Related
i am having a bit of issue with exporting my data from a List-view in VB.NET i have included screenshots of what i am seeing basically i want to see only the Values in my csv file when i export it,
as you can see i am seeing what the List-box is showing, those values are coming from the List View Before Export. also i need the export to be in 1 column not rows as shown
any help would be great..
''''
Imports System.IO
Imports System.IO.StreamReader
Imports System.IO.StreamWriter
Imports System.Data.DataSet
Public Class Form1
Private Sub startcol_Click(sender As Object, e As EventArgs) Handles startcol.Click
Timer1.Enabled = True
End Sub
Private Sub stopcol_Click(sender As Object, e As EventArgs) Handles stopcol.Click
Timer1.Enabled = False
End Sub
Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
Const MIN As Double = 5.0
Const MAX As Double = 400.0
Const DEC_PLACES As Integer = 2
Dim rnd As New Random
Dim list As Integer()
'Generate a random number X where MIN <= X < MAX and then round to DEC_PLACES decimal places.
Dim dbl As Double = Math.Round(rnd.NextDouble() * (MAX - MIN) + MIN, DEC_PLACES)
weight.Text = dbl
Dim newItem As New ListViewItem(weight.Text)
newItem.SubItems.Add(weight.Text)
'newItem.SubItems.Add(TextBox3.Text)
ListBox1.Items.Add(newItem)
ListView1.Items.Add(newItem)
rowcnt.Text = ListView1.Items.Count
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Timer1.Enabled = True
End Sub
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
' ExportDatasetToCsv(List)
'WriteToTextFile()
Me.DoSave()
End Sub
Private Sub DoSave()
Dim SFD As New SaveFileDialog()
Try
With SFD
.AddExtension = True
.CheckPathExists = True
.CreatePrompt = False
.OverwritePrompt = True
.ValidateNames = True
.ShowHelp = True
.DefaultExt = "txt"
.Filter = _
"CSV Files (*.csv)|*.csv|" & _
"All files|*.*"
.FilterIndex = 1
If .ShowDialog() = Windows.Forms.DialogResult.OK Then
Me.DoSaveItems(.FileName)
End If
End With
Catch ex As Exception
MsgBox(ex.Message, MsgBoxStyle.Exclamation, Me.Text)
End Try
End Sub
' save All values from ListView1
Private Sub DoSaveItems(ByVal fileName As String)
If fileName Is Nothing = False Then
If fileName.Length > 0 Then
Using writer As New System.IO.StreamWriter(fileName)
For Each currentItem As Object In Me.ListView1.Items
writer.Write(currentItem.ToString() & ",")
Next
End Using
End If
End If
End Sub
Public Function ExportListViewToCSV(ByVal filename As String, ByVal lv As ListView) As Boolean
Try
' Open output file
Dim os As New StreamWriter(filename)
' Write Headers
For i As Integer = 0 To lv.Columns.Count - 1
' replace quotes with double quotes if necessary
os.Write("""" & lv.Columns(i).Text.Replace("""", """""") & """,")
Next
os.WriteLine()
' Write records
For i As Integer = 0 To lv.Items.Count - 1
For j As Integer = 0 To lv.Columns.Count - 1
os.Write("""" & lv.Items(i).SubItems(j).Text.Replace("""", """""") + """,")
Next
os.WriteLine()
Next
os.Close()
Catch ex As Exception
' catch any errors
Return False
End Try
Return True
End Function
Public Sub TestExportToCSV()
Dim dlg As New SaveFileDialog
dlg.Filter = "CSV files (*.CSV)|*.csv"
dlg.FilterIndex = 1
dlg.RestoreDirectory = True
If dlg.ShowDialog = Windows.Forms.DialogResult.OK Then
If ExportListViewToCSV(dlg.FileName, ListView1) Then
Process.Start(dlg.FileName)
End If
End If
End Sub
Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
'TestExportToCSV()
End Sub
End Class
''''
As you haven't shown us your code, we can't tell you how to modify it specifically. In general though, you can treat the ListView somewhat like a 2D array, looping through the rows and the columns to get the data. That means that you could output the data to a CSV like this:
Using writer As New StreamWriter(filePath)
For rowIndex = 0 To myListView.Items.Count - 1
Dim item = myListView.Items(rowIndex)
'Write a line break before all but the first line.
If rowIndex > 0 Then
writer.WriteLine()
End If
For columnIndex = 0 To myListView.Columns.Count - 1
Dim subItem = item.SubItems(columnIndex)
'Write a field delimiter before all but the first field.
If columnIndex > 0 Then
write.Write(",")
End If
writer.Write(subItem.Text)
Next
Next
End Using
That's the old-school way. There are more succinct options, especially with the advent of LINQ:
File.WriteAllLines(filePath,
myListView.Items.
Cast(Of ListViewItem)().
Select(Function(item) String.Join(",",
item.SubItems.
Cast(Of ListViewItem.ListViewSubItem)().
Select(Function(subItem) subItem.Text))))
EDIT:
If you want to include the column headers then you can modify the above code like so:
Using writer As New StreamWriter(filePath)
For columnIndex = 0 To myListView.Columns.Count - 1
Dim column = myListView.Columns(columnIndex)
'Write a field delimiter before all but the first field.
If columnIndex > 0 Then
writer.Write(",")
End If
writer.Write(column.Text)
Next
For rowIndex = 0 To myListView.Items.Count - 1
Dim item = myListView.Items(rowIndex)
'Write a line break before each line.
writer.WriteLine()
For columnIndex = 0 To myListView.Columns.Count - 1
Dim subItem = item.SubItems(columnIndex)
'Write a field delimiter before all but the first field.
If columnIndex > 0 Then
writer.Write(",")
End If
writer.Write(subItem.Text)
Next
Next
End Using
File.WriteAllLines(filePath,
myListView.Items.
Cast(Of ListViewItem)().
Select(Function(item) String.Join(",",
item.SubItems.
Cast(Of ListViewItem.ListViewSubItem)().
Select(Function(subItem) subItem.Text))).
Prepend(String.Join(",",
myListView.Columns.
Cast(Of ColumnHeader)().
Select(Function(header) header.Text))))
I got asked a couple of days ago how to save number of clicks you have done to each button in a program to a small file, to keep track of what is most used. Since it was ages ago i dabbled with visual basic i said i would raise the question here, so here goes.
There are 5 buttons labels Button1-Button5. When a button is clicked it should look for the correct value in a file.txt and add +1 to the value. The file is structured like this.
Button1 = 0
Button2 = 0
Button3 = 0
Button4 = 0
Button5 = 0
So when button1 is clicked it should open file.txt, look for the line containing Button1 and add +1 to the value and close the file.
I have tried looking for some kind of tutorial on this but have not found it so i'm asking the collective of brains here on Stackoverflow for some guidance.
Thanks in advance.
delete file first
new ver ..
Imports System.IO.File
Imports System.IO.Path
Imports System.IO
Imports System.Text
Public Class Form1
Dim line() As String
Dim strbild As StringBuilder
Dim arr() As String
Dim i As Integer
Dim pathAndFile As String
Dim addLine As System.IO.StreamWriter
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Dim fileName As String = "myfile.txt"
Dim appPath As String = My.Application.Info.DirectoryPath
pathAndFile = Path.Combine(appPath, fileName)
If System.IO.File.Exists(pathAndFile) Then
'line = File.ReadAllLines(pathAndFile)
Else
Dim addLineToFile = System.IO.File.CreateText(pathAndFile) 'Create an empty txt file
Dim countButtons As Integer = 5 'add lines with your desired number of buttons
For i = 1 To countButtons
addLineToFile.Write("Button" & i & " = 0" & vbNewLine)
Next
addLineToFile.Dispose() ' and close file
End If
End Sub
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
writeToFile(1)
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
writeToFile(2)
End Sub
Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
writeToFile(3)
End Sub
Private Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.Click
writeToFile(4)
End Sub
Private Sub Button5_Click(sender As Object, e As EventArgs) Handles Button5.Click
writeToFile(5)
End Sub
Public Sub writeToFile(buttonId As Integer)
Dim tmpButton As String = "Button" & buttonId
strbild = New StringBuilder
line = File.ReadAllLines(pathAndFile)
Dim f As Integer = 0
For Each lineToedit As String In line
If InStr(1, lineToedit, tmpButton) > 0 Then
Dim lineSplited = lineToedit.Split
Dim cnt As Integer = lineSplited.Count
Dim newVal = addCount(CInt(lineSplited.Last()))
lineSplited(cnt - 1) = newVal
lineToedit = String.Join(" ", lineSplited)
line(f) = lineToedit
End If
f = f + 1
Next
strbild = New StringBuilder
'putting together all the reversed word
For j = 0 To line.GetUpperBound(0)
strbild.Append(line(j))
strbild.Append(vbNewLine)
Next
' writing to original file
File.WriteAllText(pathAndFile, strbild.ToString())
Me.Refresh()
End Sub
' Reverse Function
Public Function ReverseString(ByRef strToReverse As String) As String
Dim result As String = ""
For i As Integer = 0 To strToReverse.Length - 1
result += strToReverse(strToReverse.Length - 1 - i)
Next
Return result
End Function
Public Function addCount(ByVal arr As Integer) As Integer
Return arr + 1
End Function
End Class
Output in myfile.txt
Button1 = 9
Button2 = 2
Button3 = 4
Button4 = 0
Button5 = 20
Create a vb winform Application
Drag on your form 5 buttons (Button1, Button2, ... etc)
copy that :
Imports System.IO.File
Imports System.IO.Path
Imports System.IO
Imports System.Text
Public Class Form1
Dim line() As String
Dim strbild As StringBuilder
Dim arr() As String
Dim i As Integer
Dim pathAndFile As String
Dim addLine As System.IO.StreamWriter
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Dim fileName As String = "myfile.txt"
Dim appPath As String = My.Application.Info.DirectoryPath
pathAndFile = Path.Combine(appPath, fileName)
If System.IO.File.Exists(pathAndFile) Then
line = File.ReadAllLines(pathAndFile)
Else
Dim addLineToFile = System.IO.File.CreateText(pathAndFile) 'Create an empty txt file
Dim countButtons As Integer = 5 'add lines with your desired number of buttons
For i = 1 To countButtons
addLineToFile.Write("Button" & i & " = 0" & vbNewLine)
Next
addLineToFile.Dispose() ' and close file
End If
End Sub
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
writeToFile(1)
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
writeToFile(2)
End Sub
Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
writeToFile(3)
End Sub
Private Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.Click
writeToFile(4)
End Sub
Private Sub Button5_Click(sender As Object, e As EventArgs) Handles Button5.Click
writeToFile(5)
End Sub
Public Sub writeToFile(buttonId As Integer)
Dim tmpButton As String = "Button" & buttonId
strbild = New StringBuilder
line = File.ReadAllLines(pathAndFile)
i = 0
For Each lineToedit As String In line
If lineToedit.Contains(tmpButton) Then
Dim lineSplited = lineToedit.Split
Dim newVal = addCount(CInt(lineSplited.Last()))
'lineToedit.Replace(lineSplited.Last, newVal)
lineToedit = lineToedit.Replace(lineToedit.Last, newVal)
line(i) = lineToedit
End If
i = i + 1
Next
strbild = New StringBuilder
'putting together all the reversed word
For j = 0 To line.GetUpperBound(0)
strbild.Append(line(j))
strbild.Append(vbNewLine)
Next
' writing to original file
File.WriteAllText(pathAndFile, strbild.ToString())
End Sub
' Reverse Function
Public Function ReverseString(ByRef strToReverse As String) As String
Dim result As String = ""
For i As Integer = 0 To strToReverse.Length - 1
result += strToReverse(strToReverse.Length - 1 - i)
Next
Return result
End Function
Public Function addCount(ByVal arr As Integer) As Integer
Return arr + 1
End Function
End Class
Have fun ! :)CristiC777
try this on vs2013
change If confition
line = File.ReadAllLines(pathAndFile)
i = 0
For Each lineToedit As String In line
If InStr(1, lineToedit, tmpButton) > 0 Then
'If lineToedit.Contains(tmpButton) = True Then
Dim lineSplited = lineToedit.Split
Dim newVal = addCount(CInt(lineSplited.Last()))
lineToedit = lineToedit.Replace(lineToedit.Last, newVal)
line(i) = lineToedit
End If
i = i + 1
Next
I have an application to export ListView to Excel sheet , and im trying to do this in background but i have error in SaveFileDialog.showdialog().This is the error :
An exception of type 'System.Threading.ThreadStateException' occurred
in System.Windows.Forms.dll but was not handled in user code
Additional information: Current thread must be set to single thread apartment (STA) mode before OLE calls can be made. Ensure that your Main function has STAThreadAttribute marked on it. This exception is only raised if a debugger is attached to the process.
and this is my code :
Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
BackgroundWorker1.RunWorkerAsync()
End Sub
Public Sub saveExcelFile(ByVal FileName As String)
Try
Dim xls As New Excel.Application
Dim sheet As Excel.Worksheet
Dim i As Integer
xls.Workbooks.Add()
sheet = xls.ActiveWorkbook.ActiveSheet
Dim row As Integer = 1
Dim col As Integer = 1
For i = 0 To Me.ListView1.Columns.Count - 1
sheet.Cells(1, i + 1) = Me.ListView1.Columns(i).Text
Next
For i = 0 To Me.ListView1.Items.Count - 1
For j = 0 To Me.ListView1.Items(i).SubItems.Count - 1
sheet.Cells(i + 2, j + 1) = Me.ListView1.Items(i).SubItems(j).Text
Next
Next
row += 1
col = 1
' for the header
sheet.Rows(1).Font.Name = "Cooper Black"
sheet.Rows(1).Font.size = 12
sheet.Rows(1).HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter
Dim mycol As System.Drawing.Color = System.Drawing.ColorTranslator.FromHtml("#148cf7")
sheet.Rows(1).Font.color = mycol
' for all the sheet without header
sheet.Range("a2", "z1000").Font.Name = "Arial"
sheet.Range("a2", "z1000").Font.Size = 13
sheet.Range("a2", "z1000").HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter
sheet.Range("A1:X1").EntireColumn.AutoFit()
sheet.Range("A1:X1").EntireRow.AutoFit()
xls.ActiveWorkbook.SaveAs(FileName)
xls.Workbooks.Close()
xls.Quit()
Catch ex As Exception
End Try
End Sub
Private Sub BackgroundWorker1_DoWork(sender As Object, e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
Try
Dim saveFileDialog1 As New SaveFileDialog
saveFileDialog1.Filter = "Excel File|*.xlsx"
saveFileDialog1.Title = "Save an Excel File"
saveFileDialog1.ShowDialog()
If saveFileDialog1.FileName <> "" Then
saveExcelFile(saveFileDialog1.FileName)
End If
Catch ex As Exception
End Try
End Sub
Private Sub BackgroundWorker1_RunWorkerCompleted(sender As Object, e As System.ComponentModel.RunWorkerCompletedEventArgs) Handles BackgroundWorker1.RunWorkerCompleted
MsgBox("done")
End Sub
You could move everything concerning SaveFileDialog1 to Button3_Click and store the filename in a Private variable, so it can be used later in BackgroundWorker1_DoWork.
Private _filename As String
Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
SaveFileDialog1.Title = "Save Excel File"
SaveFileDialog1.Filter = "Excel files (*.xls)|*.xls|Excel Files (*.xlsx)|*.xslx"
SaveFileDialog1.ShowDialog()
'exit if no file selected
If SaveFileDialog1.FileName = "" Then
Exit Sub
End If
_filename = SaveFileDialog1.FileName
BackgroundWorker1.RunWorkerAsync()
End Sub
Private Sub BackgroundWorker1_DoWork(sender As Object, e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
...
book.SaveAs(_filename)
...
End Sub
i put this code in load form and everything is perfect:
Control.CheckForIllegalCrossThreadCalls = False
hello i want to read text file line by line and set every lien in textbox eash time i click the button
this is my code and working fine. but i looking for easy way to read large text that has more thean 5 lines ?
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
Static count As Integer
count = count + 1
Dim textfile As String = "c:\test.txt"
If IO.File.Exists(textfile) Then
Dim readLines() As String = IO.File.ReadAllLines(myFile)
If count = 1 Then
TextBox1.Text = readLines(0)
End If
If count = 2 Then
TextBox1.Text = readLines(1)
End If
If count = 3 Then
TextBox1.Text = readLines(2)
End If
If count = 4 Then
TextBox1.Text = readLines(3)
End If
If count = 5 Then
TextBox1.Text = readLines(4)
End If
If count = 6 Then
TextBox1.Text = readLines(5)
End If
End If
End Sub
I think you need to read the file just one time when you load your form (assuming a WinForms example here)
' Declare these two globally
Dim readLines() As String
Dim count As Integer = 0
Private void Form_Load(sender As Oject, e As EventArgs) Handles Base.Load
' In form load, read the file, just one time
Dim textfile As String = "c:\test.txt"
If IO.File.Exists(textfile) Then
readLines() As String = IO.File.ReadAllLines(myFile)
else
TextBox1.Text "File not found"
End If
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
' Check if you have a file and if you don't have reached the last line
if readLines IsNot Nothing AndAlso count < readLines.Length Then
TextBox1.Text = readLines(count)
count += 1
else
TextBox1.Text "End of file"
End If
End Sub
This reduces the amount of code you need to write:
TextBox1.Text = readLines(count - 1)
The TabLoad() function doesn't seem to be working on clicking of this dynamic button. The aim of this button click event is that it deletes text from a text file and loads the form again.
Below is the complete code. The TabLoad() function is in the NextDelbtn_Click sub at the end.
Also any suggestion regarding change of code is appreciated.
Imports System.IO
Public Class Form1
Dim str As String
Dim FILE_NAME As String = "D:\1.txt"
Dim file_exists As Boolean = File.Exists(FILE_NAME)
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
If TextBox1.Text = "" Then
MsgBox("Please enter text that you want to save", MsgBoxStyle.Information, "TOCC Error")
Else
str = TextBox1.Text
Dim fs As FileStream = Nothing
If (Not File.Exists(FILE_NAME)) Then
fs = File.Create(FILE_NAME)
Using fs
End Using
End If
If File.Exists(FILE_NAME) Then
Dim sw As StreamWriter
sw = File.AppendText(FILE_NAME)
sw.WriteLine(str)
sw.Flush()
sw.Close()
TabLoad()
TextBox1.Text = ""
End If
End If
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
TabControl1.SelectedIndex = TabControl1.TabIndex + 1
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
TabLoad()
End Sub
Private Sub Nextbtn_Click(sender As Object, e As EventArgs)
Dim s As String = DirectCast(DirectCast(sender, Button).Tag, Label).Text
Clipboard.SetText(s)
End Sub
Private Sub TabLoad()
Dim i As Integer = 1
For Each line As String In System.IO.File.ReadAllLines(FILE_NAME)
Dim NextLabel As New Label
Dim Nextbtn As New Button
Dim NextDelbtn As New Button
NextLabel.Text = line
Nextbtn.Text = "Copy"
NextDelbtn.Text = "Delete"
NextLabel.Height = 22
Nextbtn.Width = 55
Nextbtn.Height = 22
NextDelbtn.Width = 55
NextDelbtn.Height = 22
Nextbtn.BackColor = Color.WhiteSmoke
NextLabel.Tag = Nextbtn
Nextbtn.Tag = NextLabel
NextDelbtn.Tag = NextLabel
NextDelbtn.BackColor = Color.WhiteSmoke
NextLabel.BackColor = Color.Yellow
TabPage2.Controls.Add(NextLabel)
TabPage2.Controls.Add(Nextbtn)
TabPage2.Controls.Add(NextDelbtn)
NextLabel.Location = New Point(10, 10 * i + ((i - 1) * NextLabel.Height))
Nextbtn.Location = New Point(120, 10 * i + ((i - 1) * Nextbtn.Height))
NextDelbtn.Location = New Point(180, 10 * i + ((i - 1) * NextDelbtn.Height))
AddHandler Nextbtn.Click, AddressOf Me.Nextbtn_Click
AddHandler NextDelbtn.Click, AddressOf Me.NextDelbtn_Click
i += 1
Next
File.WriteAllLines(FILE_NAME,
File.ReadAllLines(FILE_NAME).Where(Function(y) y <> String.Empty))
End Sub
Private Sub NextDelbtn_Click(sender As Object, e As EventArgs)
Dim btn As Button = CType(sender, Button)
Dim s As String = (btn.Tag).Text
Dim lines() As String = IO.File.ReadAllLines(FILE_NAME)
Using sw As New IO.StreamWriter(FILE_NAME)
For Each line As String In lines
If line = s Then
line = ""
End If
sw.WriteLine(line)
Next
sw.Flush()
sw.Close()
TabLoad()
End Using
End Sub
End Class
Your problem appears to be that you're initializing new controls but you're not changing the controls on the form or even creating a new form.