How I call method in VB.NET

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In my application developped with vb.net , i have 3 Method
the first : function first () as parent reference
the second : function second (parent reference ) as parent reference
the third : sub third (parent reference)

in the button event , after a test (if) , i want to call those method

I mean , when (for example) i call first , i want to know exactly the value which return this méthod

in my code (in event button ) , i do :

dim ref as parent reference
dim res as parent reference 
ref= first()
res = second(ref)

but always the result is false

Dim ref As ParentReference ' reference folder ')
      'reference sous dossier
      Dim res As ParentReference ' reference subfolder

      If (exist(folder_name.selectindex) = True) Then
          MessageBox.Show("Exist folder , Vérify subfolder")

                   here i call creation subfolder (i need folder reference exactly)

folder , subfolder and file are in google drive

What I have tried:

i have to tried to call a method from event button

Posted 31-Jul-17 21:26pm

Member 8587273

Updated 31-Jul-17 22:14pm

v4

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Comments

OriginalGriff 1-Aug-17 3:31am

We're going to need to know what first and second also look like...
Use the "Improve question" widget to edit your question and provide better information.

Graeme_Grant 1-Aug-17 3:38am

You have a Button that does...? Each method (function or subroutine) has a purpose, may need to pass some values or objects to, and may just perform a task, or may need to return some form of result.

Are you able to explain what you are attempting to write?

Member 8587273 1-Aug-17 3:46am

the first method is creationfolder , the second subfolder and the third is uploding file
after existance test , i need when i create a subfolder , i want it in the folder
so , i want to know reference exactly (the folder ) then i call the sub foolder
I improve my post , and i add how i call it

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Graeme_Grant · Answer 1 · 2017-07-31T21:57:00

This should get you started:

VB

Module Module1

    Sub Main()

        Dim ParentFolder As String = My.Computer.FileSystem.SpecialDirectories.MyDocuments
        Dim ChildFolder As String = "NewChildFolder"

        CreateFolder(ParentFolder, ChildFolder)
    End Sub

    Private Sub CreateFolder(ParentFolder As String, ChildFolder As String)

        Dim FolderPath = IO.Path.Combine(ParentFolder, ChildFolder)

        If Not IO.Directory.Exists(FolderPath) Then
            MkDir(FolderPath)
        End If
    End Sub

End Module

UPDATE - GOOGLE DRIVE

You have already asked several questions on Google Drive. To recap:
* Folder Exists - How to found if folder exist or not[^]
* Upload File - How to insert a file in specific folder in Google drive VB.NET[^]

Google Drive API documentation has .Net code for Creating a folder: Work with Folders | Drive REST API | Google Developers[^]

Copied directly from the Google Drive API documentation:

C#

var fileMetadata = new File()
{
    Name = "Invoices",
    MimeType = "application/vnd.google-apps.folder"
};
var request = driveService.Files.Create(fileMetadata);
request.Fields = "id";
var file = request.Execute();
Console.WriteLine("Folder ID: " + file.Id);