get file name...

This is for an upload in asp.net to upload a file...
So I decided to still post in here.

How do I catch an error in case an upload doesnt take place...
Kinda new to asp.net with vb.net...
Can we still do on error goto a label...
Here is my code:

If there is something else I should do better please let me know.

VB Code:

Dim strFileNameWithPath As String
        Dim strFileName As String
 
        'This line will check whether a file is selected or not
        If IsNothing(Me.MyFile.PostedFile) Then lbl.Text = "Select one file to upload" : Exit Sub
        'This line will check whether the file selected is a zero length file
        If MyFile.PostedFile.ContentLength = 0 Then
            lbl.Text = "Cannot upload a zero length file!"
            Exit Sub
        Else
            'Display the file name selected
            'You can use this property with regular expression to check the file type
            strFileNameWithPath = MyFile.PostedFile.FileName
            strFileName = System.IO.Path.GetFileName(strFileNameWithPath)
 
            'Save the file to the directory
            MyFile.PostedFile.SaveAs("\\jakah-iis-2\IMS\attachments\" & strFileName)
            lbl.Text = strFileName & " uploaded successfully!"
        End If

PS: The path is hardcoded right now but will change...how do I declare that path as a variable of this class (A constant) ... I just need it so that I can say:

Public Constant strPath as String = "\\jakah-iis2\IMS\attachments\"

Is that possible somewhere ?