Question

I have a page that allow user to upload a photo and the path of the photo would be save in db, which is something like this ‘~/images/1288598614_house – Copy_000002.png’.

So, i would like to check is the file exists when user retrieve the photo.

I have tried the code below:

Dim myPhoto As String = ~/images/1288598614_house - Copy_000002.png

If File.Exists(myPhoto) Then
   hfPhotoUploadPath.Value = myPhoto 
   imgPhoto.ImageUrl = hfPhotoUploadPath.Value
Else
   imgPhoto.ImageUrl = "~/images/default.jpg"
End If

but it’s not working…..

Answer 1

You probably want to map that to a file path (example using C# syntax):

string localPath = Server.MapPath(myPhoto);
if(File.Exists(localPath)) {...}

however – the naked file system isn’t necessarily the best option for this data – or at least, you would need to sanitize it before allowing upload of some file types. Also, you might (depending on scale) need to think about multiple servers, etc.