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VB.NET Examples

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(VB.NET) Delete All Files

Permanently deletes all files owned by the user without moving it to the trash.

This example works by first getting a list of all fileIds, and then iterating over the list to delete each file.

See Google Drive Files delete for more information.

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Dim success As Boolean = True

'  It requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

'  This example uses a previously obtained access token having permission for the
'  Google Drive scope.

Dim gAuth As New Chilkat.AuthGoogle
gAuth.AccessToken = "GOOGLE-DRIVE-ACCESS-TOKEN"

Dim rest As New Chilkat.Rest

'  Connect using TLS.
Dim bAutoReconnect As Boolean = True
success = rest.Connect("www.googleapis.com",443,True,bAutoReconnect)

'  Provide the authentication credentials (i.e. the access token)
rest.SetAuthGoogle(gAuth)

'  Get 10 results per page for testing.  (The default page size is 100, with a max of 1000.
rest.AddQueryParam("pageSize","10")

Dim json As New Chilkat.JsonObject
Dim i As Integer
Dim numFiles As Integer

'  Send the request for the 1st page.
Dim jsonResponse As String = rest.FullRequestNoBody("GET","/drive/v3/files")

Dim pageNumber As Integer = 1
Dim pageToken As String
Dim bContinueLoop As Boolean = rest.LastMethodSuccess And (rest.ResponseStatusCode = 200)

Dim fileId As String
Dim saFileIds As New Chilkat.StringArray

While bContinueLoop = True

    Console.WriteLine("---- Page " & pageNumber & " ----")
    json.Load(jsonResponse)

    numFiles = json.SizeOfArray("files")
    i = 0
    While i < numFiles
        json.I = i
        fileId = json.StringOf("files[i].id")
        Console.WriteLine("name: " & json.StringOf("files[i].name"))
        Console.WriteLine("id: " & fileId)
        saFileIds.Append(fileId)
        i = i + 1
    End While

    '  Get the next page of files.
    '  If the "nextPageToken" is present in the JSON response, then use it in the "pageToken" parameter
    '  for the next request.   If no "nextPageToken" was present, then this was the last page of files.
    pageToken = json.StringOf("nextPageToken")
    bContinueLoop = False
    Dim bHasMorePages As Boolean = json.LastMethodSuccess
    If (bHasMorePages = True) Then
        rest.ClearAllQueryParams()
        rest.AddQueryParam("pageSize","10")
        rest.AddQueryParam("pageToken",pageToken)
        jsonResponse = rest.FullRequestNoBody("GET","/drive/v3/files")
        bContinueLoop = rest.LastMethodSuccess And (rest.ResponseStatusCode = 200)
        pageNumber = pageNumber + 1
    End If


End While

'  Before actually deleting, check for errors...
If (rest.LastMethodSuccess <> True) Then
    Console.WriteLine(rest.LastErrorText)
    Exit Sub
End If


'  A successful response will have a status code equal to 200.
If (rest.ResponseStatusCode <> 200) Then
    Console.WriteLine("response status code = " & rest.ResponseStatusCode)
    Console.WriteLine("response status text = " & rest.ResponseStatusText)
    Console.WriteLine("response header: " & rest.ResponseHeader)
    Console.WriteLine("response JSON: " & jsonResponse)
    Exit Sub
End If


'  OK, we have the full list of files.  Delete each..
Dim sbPath As New Chilkat.StringBuilder
numFiles = saFileIds.Count
i = 0
While i < numFiles
    fileId = saFileIds.GetString(i)

    rest.ClearAllQueryParams()

    sbPath.Clear()
    sbPath.Append("/drive/v3/files/")
    sbPath.Append(fileId)

    jsonResponse = rest.FullRequestNoBody("DELETE",sbPath.GetAsString())
    If (rest.LastMethodSuccess <> True) Then
        Console.WriteLine(rest.LastErrorText)
        Exit Sub
    End If


    '  A successful response will have a status code equal to 204 and the response body is empty.
    '  (If not successful, then there should be a JSON response body with information..)
    If (rest.ResponseStatusCode <> 204) Then
        Console.WriteLine("response status code = " & rest.ResponseStatusCode)
        Console.WriteLine("response status text = " & rest.ResponseStatusText)
        Console.WriteLine("response header: " & rest.ResponseHeader)
        Console.WriteLine("response JSON: " & jsonResponse)
        Exit Sub
    End If


    i = i + 1
    Console.WriteLine(i & ": Deleted " & fileId)
End While

Console.WriteLine("All Files Deleted.")

 

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