(VB.NET) Lookup Google Drive Folder ID Given a Folder Path

Demonstrates how to find the Google Drive folder ID given a Folder Path.

This example demonstrates that we cannot simply query by folder name. (We can if every folder name is unique, but if not...) For example, imagine we have the following directory structure on Google Drive:

/AAWorkArea
/AAWorkArea/FolderA
/AAWorkArea/FolderB
/Folder2
/Folder2/FolderA

There are two directories named "FolderA". One is contained within AAWorkArea, and one is contained within "Folder2". To say it differently: One has the parent "AAWorkArea" and the other's parent is "Folder2".

To find the id of "/AAWorkArea/FolderA", we need to first find the id for "AAWorkArea", and then find the id for the folder with name="FolderA" and with AAWorkArea's id in FolderA's parents.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

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)

Dim json As New Chilkat.JsonObject
json.EmitCompact = False

' Get the AAWorkArea folder that is in the Google Drive root.
rest.AddQueryParam("q","'root' in parents and name='AAWorkArea'")
Dim jsonResponse As String = rest.FullRequestNoBody("GET","/drive/v3/files")
If (rest.LastMethodSuccess <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If

json.Load(jsonResponse)
Debug.WriteLine(json.Emit())
Debug.WriteLine("name: " & json.StringOf("files[0].name"))
Debug.WriteLine("id: " & json.StringOf("files[0].id"))
Debug.WriteLine("mimeType: " & json.StringOf("files[0].mimeType"))
Debug.WriteLine("-")

rest.ClearAllQueryParams()

' Now that we know the ID for the AAWorkarea directory, get the id for the FolderA having AAWorkArea as the parent.
Dim sbQuery As New Chilkat.StringBuilder
sbQuery.Append("name = 'FolderA' and '")
sbQuery.Append(json.StringOf("files[0].id"))
sbQuery.Append("' in parents")
rest.AddQueryParamSb("q",sbQuery)

jsonResponse = rest.FullRequestNoBody("GET","/drive/v3/files")
If (rest.LastMethodSuccess <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


json.Load(jsonResponse)
Debug.WriteLine(json.Emit())
Debug.WriteLine("name: " & json.StringOf("files[0].name"))
Debug.WriteLine("id: " & json.StringOf("files[0].id"))
Debug.WriteLine("mimeType: " & json.StringOf("files[0].mimeType"))
Debug.WriteLine("-")