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How do I delete a file which was last modified yesterday or before ?

Posted on 2010-08-29
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Last Modified: 2013-11-07
I'm using the following code to delete a file, but I need to modify it to just delete a file if it was last modified yesterday or before. So not if todays date.

Dim sqlfile As DirectoryInfo = New DirectoryInfo(System.IO.Path.GetDirectoryName( _
               System.Reflection.Assembly.GetEntryAssembly.Location.ToString()) & "\") 

            Try : File.Delete(sqlfile.FullName & System.Reflection.Assembly.GetExecutingAssembly.GetName.Name & "PossSQLErr.txt") : Catch ex As Exception : LogError(ex, "MAIN-3a") : End Try

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Question by:mindwarpltd
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7 Comments
 
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Accepted Solution

by:
Akin Delu earned 167 total points
ID: 33552684
       dim flinfo as New System.IO.FileInfo("filename")
        dim dt as DateTime = flinfo.LastWriteTime
        if DateTime.Now.Year >= dt.Year and DateTime.Now.Month >= dt.Month then
                dim daydiff as int = DateTime.Now.Day - dt.Day
                if daydiff >= 1 and daydiff < 2 then
                    System.IO.File.Delete("filename");
                end if
        end if
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LVL 42

Assisted Solution

by:sedgwick
sedgwick earned 166 total points
ID: 33553219
here you go

Dim sqlfile As DirectoryInfo = New DirectoryInfo(System.IO.Path.GetDirectoryName( _
               System.Reflection.Assembly.GetEntryAssembly.Location.ToString()) & "\")

        Dim fi As FileInfo = New FileInfo(sqlfile.FullName & System.Reflection.Assembly.GetExecutingAssembly.GetName.Name & "PossSQLErr.txt")

'check if exists and last modified time is equal or bigger than 1
        If fi.Exists And DateDiff(DateInterval.Day, DateTime.Now, fi.LastWriteTime) >= 1 Then
            Try
                fi.Delete()
            Catch ex As Exception

            End Try

        End If

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LVL 75

Assisted Solution

by:käµfm³d 👽
käµfm³d   👽 earned 167 total points
ID: 33556825
It should be as simple as:
System.IO.FileInfo fi = new System.IO.FileInfo("filename");

if (DateTime.Now.Subtract(fi.LastWriteTime).TotalDays > 0) fi.Delete(); // == 0 means we're in the same day

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Expert Comment

by:sedgwick
ID: 33556866
@kaufmed

which is the same as my post without the exception handling and the file validation.
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Expert Comment

by:käµfm³d 👽
ID: 33557069
Except that you're using vb6 style functions and I'm using the .NET OO-centric functions  ;)
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LVL 42

Expert Comment

by:sedgwick
ID: 33557234
that's true.
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Author Comment

by:mindwarpltd
ID: 33573989
@kaufmed I also said vb.net
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