.net – How to copy a file from one directory to another directory by creating the folder if that folder does not exist

.netcopydirectoryfilevb.net

I have some problem with copying the file from one directory to another directory by creating the folder if that folder does not exist in the destination directory.

Example:

  • Source path: C:\temp\test\1.txt
  • Destination path: C:\Data\

If C:\Data\ doesn't contain "temp" or "test" folder, it should create the folder before coping 1.txt.

Copied to C:\Data\temp\test\1.txt

Below is my code. But it doesn't work..

Private Sub btnBackup_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnBackup.Click
          Dim sourcepath As String = "C:\temp\test\1.txt"
    Dim DestPath As String = "C:\Data\"
    CopyDirectory(sourcepath, DestPath)
End Sub

Private Shared Sub CopyDirectory(sourcePath As String, destPath As String)
    If Not Directory.Exists(destPath) Then
        Directory.CreateDirectory(destPath)
    End If

    For Each file__1 As String In Directory.GetFiles(sourcePath)
        Dim dest As String = Path.Combine(destPath, Path.GetFileName(file__1))
        File.Copy(file__1, dest)
    Next

    For Each folder As String In Directory.GetDirectories(sourcePath)
        Dim dest As String = Path.Combine(destPath, Path.GetFileName(folder))
        CopyDirectory(folder, dest)
    Next
End Sub

Best Solution

The following is not a directory.

Dim sourcepath As String = "C:\temp\test\1.txt"

Because you are using it as a directory in Directory.GetFiles(sourcePath).

Apart from that, I recommend to elaborate your questions more the next time. The code raises meaningful exceptions like DirectoryNotFoundException with the appropriate path as message or (if the file exists) an IOException with message "The directory name is invalid". You should have added that to the question.

So the solution simply is to remove the 1.txt from the directory-name:

Dim sourcepath As String = "C:\temp\test\"

If you need to copy only one file, use CopyTo method:

Dim sourcepath As String = "C:\temp\test\"
Dim DestPath As String = "C:\temp\Data\"
If Not Directory.Exists(DestPath) Then
    Directory.CreateDirectory(DestPath)
End If
Dim file = New FileInfo("C:\temp\test\1.txt")
file.CopyTo(Path.Combine(DestPath, file.Name), True)