Good morning,

I am trying to complete the example on page 129 and I am receiving the following error:

An unhandled exception of type 'System.Security.SecurityException' occurred in mscorlib.dll

Additional information: Request for the permission of type System.Security.Permissions.FileIOPermission, mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 failed.

My code reads:

        Dim subFolders() As DirectoryInfo
        subFolders = New DirectoryInfo("c:\").GetDirectories

        Dim subFolder As DirectoryInfo

        For Each subFolder In subFolders
            lstData.Items.Add(subFolder.FullName)

[remainder of code omitted]

Can someone please assist and tell me what this error means?

Thanks in advance.

Eric

Which line are you getting the error on?

This error in general sounds to me like you have tried to access a folder that your user does not have permission to look at.

It would help if you would supply the values of the Message property, the Source Property, StackTrace Property. You can look at the HelpLink to see if there is any useful information there. The properties listed above will be on the exception object that you received.

If you include this information, we have a much better chance of determining what issue you have.

If the book you are working from has a chapter on exception/error handling, now is probably a good time to read it. :)

On a side note: This is not a forum for the book "Beginning VB.Net", so we may not have access to, or have ever read Chapter 3, page 129. If you describe your problem fully, then we can try to help here. Or for book specific stuff, there is a forum specifically for that book. You can find it on the p2p.wrox.com site the tree to it is:
">All Forums>Books>Beginning VB.NET, 2nd Edition"



John R Lick
[email protected]