Copying one array element to another array

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I have written a code to read a text box character by character and copy the characters into another array. As soon as the space character occurs the process should stop. the Program is giving argument null exception at runtime. Any solutions.

Here is the code.

VB

Private Sub file_open_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles file_open.Click
Dim objreader As New System.IO.StreamReader(file_name.Text)
    TextBox1.Text = objreader.ReadLine

    TextBox1.Text = TextBox1.Text & objreader.ReadLine & vbCrLf

    Dim myArray() As Char
    Dim myArray2() As Char

    myArray = Me.TextBox1.Text.ToCharArray
    For i As Integer = 1 To 70
        If myArray(i) <> " " Then

        Else
            Array.Copy(myArray, myArray2, i)     'exception here

        End If
    Next

End Sub

Posted 24-Sep-11 4:58am

Razanust

Updated 24-Sep-11 5:01am

Simon Bang Terkildsen

v2

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Simon Bang Terkildsen · Answer 1 · 2011-09-24T05:07:00

Solution 1

you haven't initialized myArray2 so it's null just like your exception tells you.

However the code you posted makes no sense, all you're trying to do is copying all the elements in myArray to myArray2 except any space(s) that might be at the end of myArray. And you're doing it again and again..

Posted 24-Sep-11 5:07am

Simon Bang Terkildsen

Comments

Sergey Alexandrovich Kryukov 25-Sep-11 3:42am

Correct, my 5.
--SA

Simon Bang Terkildsen 25-Sep-11 9:00am

Thank you

Mario Majčica · Answer 2 · 2011-09-24T05:13:00

Solution 2

Try using a list of chars List(Of Char)
And once ready call ToArray method. In this way you do not need to deal with array sizes.

Something like

VB

Dim myArray1 As List(Of Char) = TextBox1.Text.ToCharArray
Dim myArray2 As List(Of Char) = New List(Of Char)

For Each c As Char In myArray1
    If c <> " " Then
        myArray2.Add(c)
    Else
        Exit For
    End If
Next

Cheers

Posted 24-Sep-11 5:13am

Mario Majčica

Updated 24-Sep-11 6:26am

v2

Comments

Sergey Alexandrovich Kryukov 25-Sep-11 3:43am

Makes sense, my 5.
--SA

Mario Majčica 25-Sep-11 7:02am

But to Razanust it doesn't! :) Love people who ask and then disappear! :)

Simon Bang Terkildsen 25-Sep-11 9:05am

you got my 5 too
About the OP not accepting, voting or commenting thats just the way some inquirers behave, once they post they expect a satisfying answer and if they don't get one, just posts the question on some other forum, or even reposts on the same forum.
Before answering a question I usually look up the previous quesions the OP has posted, if he isn't engaged in this questions then I don't put more than a minute or two into my answer, if I even bother answering :)

Mario Majčica 25-Sep-11 10:31am

Internet made people lazy and rude!