Read File name and put it into Variable - vb.net

Question

I am trying to find a way to read a specific file name in a directory and then put the file name into a variable. In my program I have a batch file that zips a folder called logs and then changes the name of zip to username_date_time.zip.
So basically if the filename was jobs_03152015_1315.zip I would want the entire file name but not the path stored into a variable. The file starts off on the user's local machine. It is then uploaded into a network share.
The network path will be uploaded to a database for others to view. I want to just add the unique file name to the end of a pre set path. Here is the code I am using.
Dim filePath As String = "c:\temp\logs\"
If (System.IO.Directory.Exists(filePath)) Then
For Each file As String In filePath
If file.Contains(".zip") Then
Dim zip As String = file
testbox.Text = zip
Exit For
End If
Next
End If

Answer 1

You can enumerate all files using the GetFiles() method of the static (shared in VB) Directory class, see msdn.
Assuming you have more then 1 file I add the files to a listbox control. But you could change that if you wish. I get the filename using the Path class. You will find a lot other helpful functions in this class.
Dim searchPath = "C:\temp\logs"
Dim files = Directory.GetFiles(path, "*.zip")
For Each file In files
listbox1.Items.Add(path.GetFileName(file))
Next
This should do it.

Answer 2

Your loop doesn't read anything. The string variable filePath is just the name of the directory, not a list of the files in that directory. Calling For Each over a string simply enumerates each character contained in the string
To get a list of files contained in that folder you need Directory.EnumerateFiles() and pass the filePath variable and the extension required.
It seems that you are interested only to find if that folder contains at least one file with zip extension. If this is the case then you could remove the explicit loop and write simply
Dim file = Directory.EnumerateFiles(filePath, "*.zip").FirstOrDefault()
If file IsNot Nothing Then
testbox.Text = Path.GetFileName(file)
End If
Using Path.GetFileName will return just the file without the path part

Answer 3

Try this code :
Dim FilePath As String = "c:\temp\logs\"
If (System.IO.Directory.Exists(FilePath)) Then
For Each File As String In System.IO.Directory.EnumerateFiles(FilePath)
If File.Contains(".zip") Then
Dim info As New System.IO.FileInfo(File)
zip = info.Name
testbox.Text = zip
Exit For
End If
Next
End If