(C# UWP/WinRT) List all Folders

Demonstrates how to retrieve a list of all folders.

Note: Let's say we have a directory tree with the following folders in Google Drive:

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

This would be our result. Notice that the "name" of each folder is NOT the full path, but just the final folder name. To distinguish between the two FolderA's, we would need to get the parent information for each.

---- Page 1 ----
name: FolderB
id: 1ep8p9wsCV8S_xTI7G1-qEuf8RNO_9250
mimeType: application/vnd.google-apps.folder
-
name: FolderA
id: 1h_BWJGEn7L7aFV5SN8iOKv91uxddTbY8
mimeType: application/vnd.google-apps.folder
-
name: Folder2
id: 1cvDIF78KSDuUyrU_VCKRSRbmENWkHNqV
mimeType: application/vnd.google-apps.folder
-
name: AAWorkArea
id: 0BzXkF-yZEO0-ank3VndfZTZsdlk
mimeType: application/vnd.google-apps.folder
-
name: FolderA
id: 1Fksv-TfA1ILii1YjXsNa1-rDu8Cdrg72
mimeType: application/vnd.google-apps.folder
-

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

bool success = true;

// This example 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.

Chilkat.AuthGoogle gAuth = new Chilkat.AuthGoogle();
gAuth.AccessToken = "GOOGLE-DRIVE-ACCESS-TOKEN";

Chilkat.Rest rest = new Chilkat.Rest();

// Connect using TLS.
bool bAutoReconnect = true;
success = await rest.ConnectAsync("www.googleapis.com",443,true,bAutoReconnect);

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

// Get 50 results per page for testing.  (The default page size is 100, with a max of 1000.
rest.AddQueryParam("pageSize","50");

// Get all entries that are folders.
rest.AddQueryParam("q","mimeType = 'application/vnd.google-apps.folder'");

Chilkat.JsonObject json = new Chilkat.JsonObject();
json.EmitCompact = false;

int i;
int numFiles;

// Send the request for the 1st page.
string jsonResponse = await rest.FullRequestNoBodyAsync("GET","/drive/v3/files");

int pageNumber = 1;
string pageToken;
bool bContinueLoop = rest.LastMethodSuccess && (rest.ResponseStatusCode == 200);

while (bContinueLoop == true) {

    Debug.WriteLine("---- Page " + Convert.ToString(pageNumber) + " ----");

    // Iterate over each file in the response and show the name, id, and mimeType.
    json.Load(jsonResponse);

    numFiles = json.SizeOfArray("files");
    i = 0;
    while (i < numFiles) {
        json.I = i;
        Debug.WriteLine("name: " + json.StringOf("files[i].name"));
        Debug.WriteLine("id: " + json.StringOf("files[i].id"));
        Debug.WriteLine("mimeType: " + json.StringOf("files[i].mimeType"));
        Debug.WriteLine("-");
        i = i + 1;
    }

    // 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;
    bool bHasMorePages = json.LastMethodSuccess;
    if (bHasMorePages == true) {
        rest.ClearAllQueryParams();
        rest.AddQueryParam("pageSize","50");
        rest.AddQueryParam("pageToken",pageToken);
        rest.AddQueryParam("q","mimeType = 'application/vnd.google-apps.folder'");

        jsonResponse = await rest.FullRequestNoBodyAsync("GET","/drive/v3/files");
        bContinueLoop = rest.LastMethodSuccess && (rest.ResponseStatusCode == 200);
        pageNumber = pageNumber + 1;
    }

}

if (rest.LastMethodSuccess != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

// A successful response will have a status code equal to 200.
if (rest.ResponseStatusCode != 200) {
    Debug.WriteLine("response status code = " + Convert.ToString(rest.ResponseStatusCode));
    Debug.WriteLine("response status text = " + rest.ResponseStatusText);
    Debug.WriteLine("response header: " + rest.ResponseHeader);
    Debug.WriteLine("response JSON: " + jsonResponse);
    return;
}