Regular expression ( Regex ) to validate Path in ASP.Net

I don't see any variable to validate path? Where you want to validate?

i want to validate the path i.e. "../Error/Feedbackdoc/"

Dim FilePathRegEx As Regex = New Regex("(?:[.\.\]/)([a-z]+)+\.(?i)$") If FilePathRegEx.IsMatch(Server.MapPath("../Error/Feedbackdoc/" & fid & ext)) Then Filedoc.SaveAs(Server.MapPath("../Error/Feedbackdoc/" & fid & ext)) Else objcommon.infoBox("Upload a valid file with extensions doc/docx/jpg/jpeg/pdf") Exit Sub End If

i have used a reg exp but iti is not working for the exact file path above written

But validate what? And where? There should some variable some control which should have some value right?

to validate the path where the file will get uploaded..

Dim ext As String = System.IO.Path.GetExtension(Filedoc.PostedFile.FileName)

this is the file uploaded control

but i want to validate the path :

Server.MapPath("../Error/Feedbackdoc/" & ext)

using regular expression

If Filedoc.HasFile Then Dim ImageFileExtRegEx As Regex = New Regex("(([.\.\])(\\([a-zA-Z]))$") 'Dim FilePathRegEx As Regex = New Regex("(?:[.\.\]/)([a-zA-Z]+)+([a-zA-Z]+)+(.jpeg|.jpg|.png|.doc|.docx|.pdf|.gif)$") 'Dim FilePathRegEx2 As Regex = New Regex("(?:[.\.\])\\(?:[a-zA-Z])*+(.jpeg|.jpg|.png|.doc|.docx|.pdf|.gif)$") If ImageFileExtRegEx.IsMatch(Server.MapPath("../Error/Feedbackdoc/" & fid & ext)) Then Filedoc.SaveAs(Server.MapPath("../Error/Feedbackdoc/" & fid & ext)) Else objcommon.infoBox("Upload a valid file with extensions doc/docx/jpg/jpeg/pdf") Exit Sub End If End If

This is impossible

1. First of all you don't get Full Path in FileName propert of FileUpload

2. It is quite impossible to have Client machine have same Folder structure as yours and also there is no need for you to validate it