vb.net - Why do I get this error when trying to bubble sort a csv file? - vb.net

Question

I have a csv file which I'm trying to sort by data (numerical form)
The csv file:
date, name, phone number, instructor name
1308290930,jim,041231232,sushi
123123423,jeremy,12312312,albert
The error I get is: Conversion from string "jeremy" to type 'double'is not valid
Even though no where in my code I mention double...
My code:
Public Class Form2
Dim currentRow As String()
Dim count As Integer
Dim one As Integer
Dim two As Integer
Dim three As Integer
Dim four As Integer
'concatenation / and operator
'casting
Dim catchit(100) As String
Dim count2 As Integer
Dim arrayone(4) As Decimal
Dim arraytwo(4) As String
Dim arraythree(4) As Decimal
Dim arrayfour(4) As String
Dim array(4) As String
Dim bigstring As String
Dim builder As Integer
Dim twodata As Integer
Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Using MyReader As New Microsoft.VisualBasic.FileIO.TextFieldParser("D:\completerecord.txt")
MyReader.TextFieldType = FileIO.FieldType.Delimited
MyReader.SetDelimiters(",")
Dim currentRow As String()
Dim count As Integer
Dim currentField As String
count = 0
While Not MyReader.EndOfData
Try
currentRow = MyReader.ReadFields()
For Each currentField In currentRow
' makes one array to contain a record for each peice of text in the file
'MsgBox(currentField) '- test of Field Data
' builds a big string with new line-breaks for each line in the file
bigstring = bigstring & currentField + Environment.NewLine
'build two arrays for the two columns of data
If (count Mod 2 = 1) Then
arraytwo(two) = currentField
two = two + 1
'MsgBox(currentField)
ElseIf (count Mod 2 = 0) Then
arrayone(one) = currentField
one = one + 1
ElseIf (count Mod 2 = 2) Then
arraythree(three) = currentField
three = three + 1
ElseIf (count Mod 2 = 3) Then
arrayfour(four) = currentField
four = four + 1
End If
count = count + 1
'MsgBox(count)
Next
Catch ex As Microsoft.VisualBasic.FileIO.MalformedLineException
MsgBox("Error Occured, Please contact Admin.")
End Try
End While
End Using
RichTextBox1.Text = bigstring
' MsgBox("test")
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim NoMoreSwaps As Boolean
Dim counter As Integer
Dim Temp As Integer
Dim Temp2 As String
Dim listcount As Integer
Dim builder As Integer
Dim bigString2 As String = ""
listcount = UBound(arraytwo)
'MsgBox(listcount)
builder = 0
'bigString2 = ""
counter = 0
Try
'this should sort the arrays using a Bubble Sort
Do Until NoMoreSwaps = True
NoMoreSwaps = True
For counter = 0 To (listcount - 1)
If arraytwo(counter) > arraytwo(counter + 1) Then
NoMoreSwaps = False
If arraytwo(counter + 1) > 0 Then
Temp = arraytwo(counter)
Temp2 = arrayone(counter)
arraytwo(counter) = arraytwo(counter + 1)
arrayone(counter) = arrayone(counter + 1)
arraytwo(counter + 1) = Temp
arrayone(counter + 1) = Temp2
End If
End If
Next
If listcount > -1 Then
listcount = listcount - 1
End If
Loop
'now we need to output arrays to the richtextbox first we will build a new string
'and we can save it to a new sorted file
Dim FILE_NAME As String = "D:\sorted.txt"
'Location of file^ that the new data will be saved to
If System.IO.File.Exists(FILE_NAME) = True Then
Dim objWriter As New System.IO.StreamWriter(FILE_NAME, True)
'If D:\sorted.txt exists then enable it to be written to
While builder < listcount
bigString2 = bigString2 & arraytwo(builder) & "," & arrayone(builder) + Environment.NewLine
objWriter.Write(arraytwo(builder) & "," & arrayone(builder) + Environment.NewLine)
builder = builder + 1
End While
RichTextBox2.Text = bigString2
objWriter.Close()
MsgBox("Text written to log file")
Else
MsgBox("File Does Not Exist")
End If
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Sub
End Class

Answer 1

I think in this line is the problem
arrayone(one) = currentField
Here it trys to cast the string to a double. You have to use something like this:
arrayone(one) = Double.Parse(currentField)
or to have it a saver way:
Dim dbl As Double
If Double.TryParse(currentField, dbl) Then
arrayone(one) = dbl
Else
arrayone(one) = 0.0
End If