Error receiving email

[NJDubois]

So I'm setting up my mailing list program. Everything is going and working great. It catches the message from outlook when a new message is received.

But I can't do anything with the data? The code for the message catch is

Dim OutlookNS As Outlook.NameSpace
OutlookNS = outlookApp.GetNamespace("MAPI")

Dim Inbox As Outlook.MAPIFolder
Inbox = OutlookApp.Session.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox)

Dim NewMail As Outlook.MailItem
NewMail = OutlookNS.GetItemFromID(EntryIDCollection, Inbox.StoreID)

Dim str As String = NewMail.SenderEmailAddress & "," & NewMail.Subject

but I can't do anything with str?
for example
msgbox(str) works great! I get a pretty message box saying "whoever@whatever.com, subscribe"

BUT, if I try to do anything else with it

textbox1.text = str

I get this error

A first chance exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll

Why is this happening?

Thanks for the help guys. I'll be a vb.net programmer someday...

Nick

 

[Stonkie]

That's weird... If the String can be sent to a message box, it is correct... Have you tried replacing <textbox1.text = str> by <textbox1.text = "abc">?

Maybe the TextBox or the form it is on are disposed or something...

 

[cjard]

On the Debug menu, Click Exceptions* and put a tick next to "thrown"

Show us the exact line of code that is throwing this error if possible

*you might have to customize your menu for this (right click any toolbar and click Customize), as some vb people seem not to have it by default

 

[NJDubois]

update...

Ok, the line that seems to give me the error is anytime I try to use the data.

textbox1.text = str

or

listbox1.items.add(str)

you name it, it does it. It doesn't kill the program, and everytime that line of code is ran it outputs the error again.

but if I do say textbox1.text = "Hello"
or the same for the listbox in place of the str it works as it is supposed to.

When I get home I will look to see if Exceptions is set to "thrown", but I am pretty sure it isn't.

Thanks for the replys. I hope that exceptions is set wrong, cause this is driving me crazy!

Thanks for the fast replys, and if there is anything else I can do please post!

Thanks
nick

 

[Stonkie]

Can you give us the stack trace of the exception to see if you don't have some validation, format or anything that can be caused by the textbox's inner working?

I must admit I have no idea... Can you post some code? I mean some structure so we can look for anything that might lie out of the few lines you already posted...

 

[cjard]

also switch on option explicit and option strict, fix any compiler errors that doing so realises

 

[NJDubois]

The source.

Because I have a lot of things on my todo list and today is not a day for coding I do not have any time to mess with this right now. Here is the source code, I hope it helps you to help me!

I followed this howto
http://www.devx.com/dotnet/Article/35900

The code I am giving you is a simplified version of it. Just a listbox, and the code needed to catch the email.

I regret to say that you need to have outlook (outlook express wouldn't work?) in order to test it, and get the code where I am having the problem used.

Thanks for the aid!

Nick

 

[JohnH]

There is attempt to access UI from different thread, perhaps because it is a COM object there is no exception message for it. Using the standard invoke pattern solves it:

Private Delegate Sub SetTextHandler(ByVal txt As String)

Private Sub SetText(ByVal txt As String)
    If Me.ListBox1.InvokeRequired Then
        Dim d As New SetTextHandler(AddressOf SetText)
        Me.ListBox1.Invoke(d, txt)
    Else
        Me.ListBox1.Items.Add(txt)
    End If
End Sub

From the event you can call SetText(str).