Please help w/ Debugging Index Out of Bounds

I am posting extensive details and code here, including the runtime error message I receive that keeps killing my application. I am about to pull my hair out because I cannot find anything wrong with the code, and I do not get the error when debugging the application in VB! Basically a user enters some medical information on a form in text boxes and adds some medical conditons and medications into two listbox controls on the form, on for medical problems and one for medications they are on. When Button1 (command button) is clicked, it calls a subroutine stored in a module1. Then the application throws and Index out of Bounds error and crashes, losing all information that was entered. Here is the code on Button1:

Code:

---

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNext5.Click

Call Store_MedData

End Sub

---

Here is the code for Store_MedData in the module. The error occurs on red text:

Code:

---

Dim ClientLastName as string, ClientMI as String, ClientFirstName as string, ClientAddress as String, _
ClientAddress2 as String, ClientCity as String, ClientState as String, ClientZip as String, ClientDOB as String, _
ClientBloodType as String,ClientActiveMeds(frmmain.lstActiveMeds.Items.Count - 1) As String, _
ClientActiveMedProbs(frmmain.lstActiveMedProbs.Items.Count - 1) as String
 
Public Sub Store_MedData()

        'Store all client information as string values
        ClientLastName = Trim(frmmain.txtLastname.Text)
        ClientMI = Trim(frmmain.txtMI.Text)
        ClientFirstname = Trim(frmmain.txtFirstname.Text)
        ClientAddress = Trim(frmmain.txtAddress1.Text)
        ClientAddress2 = Trim(frmmain.txtAddress2.Text)
        ClientCity = Trim(frmmain.txtCity.Text)
        ClientState = Trim(frmmain.cmbState.Text)
        ClientZip = Trim(frmmain.mtxtZip.Text)
        ClientDOB = Trim(frmmain.mtxtDOB.Text)
        ClientBloodType = Trim(frmmain.cmbBloodType.Text)

        'Store the path of the client photo
        ClientPhotoPath = Trim(frmmain.openPic.FileName)

        'store all active medications information in an array & build a string
        For i As Integer = 0 To frmmain.lstActiveMeds.Items.Count - 1
            ClientActiveMeds(i) = frmmain.lstActiveMeds.Items.Item(i).ToString
        Next

        If frmmain.lstActiveMeds.Items.Count = 0 Then
            ActiveMedsResult = ""
        Else
            ActiveMedsResult = String.Join(", ", ClientActiveMeds)
            ActiveMedsResult = Left(ActiveMedsResult, Len(ActiveMedsResult) - 2)
        End If



        'store all active medical problem information in an array & build a string
        For i As Integer = 0 To frmmain.lstActiveMedProbs.Items.Count - 1
            ClientActiveMedProbs(i) = frmmain.lstActiveMedProbs.Items.Item(i).ToString
        Next

        If frmmain.lstActiveMedProbs.Items.Count = 0 Then
            ActiveMedProbsResult = ""
        Else
            ActiveMedProbsResult = String.Join(", ", ClientActiveMedProbs)
            ActiveMedProbsResult = Left(ActiveMedProbsResult, Len(ActiveMedProbsResult) - 2)
        End If

End Sub

---

AND, here is the Runtime error message when running the application compiled and installed on a workstation. I don't see how or why the index out of bounds error is occurring. It should never count anywhere outside of the number of items in the listbox according to the code:

Code:

---

See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.IndexOutOfRangeException: Index was outside the bounds of the array.
  at MYAPP.Medical.Store_Data()
  at MYAPP.frmmain.Button1_Click(Object sender, EventArgs e)
  at System.Windows.Forms.Control.OnClick(EventArgs e)
  at System.Windows.Forms.Button.OnClick(EventArgs e)
  at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
  at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
  at System.Windows.Forms.Control.WndProc(Message& m)
  at System.Windows.Forms.ButtonBase.WndProc(Message& m)
  at System.Windows.Forms.Button.WndProc(Message& m)
  at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
  at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
  at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


************** Loaded Assemblies **************
mscorlib
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3074 (QFE.050727-3000)
    CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll
----------------------------------------
MyAPP
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///C:/Program%20Files/MYAPP/MYAPP.exe
----------------------------------------
Microsoft.VisualBasic
    Assembly Version: 8.0.0.0
    Win32 Version: 8.0.50727.3053 (netfxsp.050727-3000)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/Microsoft.VisualBasic/8.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.dll
----------------------------------------
System
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3053 (netfxsp.050727-3000)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Windows.Forms
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3053 (netfxsp.050727-3000)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3053 (netfxsp.050727-3000)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Runtime.Remoting
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3053 (netfxsp.050727-3000)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Runtime.Remoting/2.0.0.0__b77a5c561934e089/System.Runtime.Remoting.dll
----------------------------------------
System.Configuration
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3053 (netfxsp.050727-3000)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Configuration/2.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
System.Xml
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3074 (QFE.050727-3000)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Xml/2.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
AxInterop.csXImage
    Assembly Version: 3.4.0.0
    Win32 Version: 3.4.0.0
    CodeBase: file:///C:/Program%20Files/MYAPP/AxInterop.csXImage.DLL
----------------------------------------
Interop.csXImage
    Assembly Version: 3.4.0.0
    Win32 Version: 3.4.0.0
    CodeBase: file:///C:/Program%20Files/MYAPP/Interop.csXImage.DLL
----------------------------------------

************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.

For example:

<configuration>
    <system.windows.forms jitDebugging="true" />
</configuration>

When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.

---

The application is being run on a PC running Windows Vista Home Premium w/ SP1. (aka. Windows "Worthless Edition"):D

Any help getting this issue resolved is extremely appreciated as it is driving me crazy and is the only thing keep my application from being used. I have been trying to resolve this issue for over a month now with no success. Thanks in advance for any insight.

-Jeremy

are you adding any items to the listbox during execution of your program?

you need to be sure that the upperbound of the array = items.count -1

Yes, the user enters the name of medication into a textbox and then clicks a button to add it to the listbox. The number of items in the listboxes will be variable. My arrays are declared here as you mentioned:

Code:

---

Dim ClientLastName as string, ClientMI as String, ClientFirstName as string, ClientAddress as String, _
ClientAddress2 as String, ClientCity as String, ClientState as String, ClientZip as String, ClientDOB as String, _
ClientBloodType as String,ClientActiveMeds(frmmain.lstActiveMeds.Items.Count - 1) As String, _
ClientActiveMedProbs(frmmain.lstActiveMedProbs.Items.Count - 1) as String

---

You need to REDIM PRESERVE your arrays everytime an item is added, otherwise, your list will grow, and the array will not.

Instead of using arrays, I recommend using a List(of string) instead. It's more fool-proof (but they always make a better fool!)

did that solve your problem?

don't forget to mark the thread resolved

Something like this?

Code:

---

'store all active medications information in an array & build a string
        For i As Integer = 0 To frmamenmain.lstActiveMeds.Items.Count - 1
            ClientActiveMeds(i) = frmamenmain.lstActiveMeds.Items.Item(i).ToString
            ReDim Preserve ClientActiveMeds(i)
        Next

---

Thanks.

vb Code:

frmmain.lstActiveMeds.Items.add("whatever")
ReDim Preserve ClientActiveMeds(frmmain.lstActiveMeds.Items.Count - 1)

Ok, I am confused now because the subroutine Store_MedData is in a module. The Arrays are declared in the module, but the button_1 is actually on the main form. So I will not be able to reference the array from outside of the module. What do i need to search for on List. If there is a better way to do this, I'd rather just re-code it and have it work than chase my tail forever trying to fix what I've got now. Thanks for the help.

declare the array public instead of dim'ing it

I still cannot make this work. All I am trying to do is loop through all of the items in a listbox, and build a string.

Listbox Contents:

MedicineA
MedicineB
MedicineC
MedicineD
I need to build a string like below, separating the medicine with a comma and a space:

MedicineA, MedicineB, MedicineC, MedicineD

The only variable is the number of items in the listbox. Is there an easier way to do this.