Comparing FileInfo Created Dates

[dotnetnube]

I need to find the newest file in a file folder by looking at the creation date. What is the best way to go about this?

I already have the code below to do some other work. Can I insert code to do the comparison inside the For...Each, or is there a better way to do it?

Dim sourceFiles As FileInfo()
Dim sourceFile As FileInfo

For each sourceFile in Sourcefiles
...existing code
Next

Thank you in advance!

 

[JohnH]

Sort the array by one of the file date properties, this can be done with a Comparison(Of T) delegate:

Array.Sort(infos, AddressOf FileDateSort)

Where the FileDateSort implementation can be this:

Function FileDateSort(ByVal x As IO.FileInfo, ByVal y As IO.FileInfo) As Integer
    Return x.LastWriteTime.CompareTo(y.LastWriteTime)
End Function

Now the FileInfo array is sorted from old to new, where last item is the most recent file.

If you have to do a full For-Each loop anyway then you can save a little processing time by using a temp variable and compare each FileInfo to find the newest file:

Dim temp As IO.FileInfo = infos(0)
For Each info As IO.FileInfo In infos
    If temp.LastWriteTime < info.LastWriteTime Then
        temp = info
    End If
Next

At the end of the loop the temp variable hold the info for newest file.

 

[dotnetnube]

That works great!

Thank you for the help!