(C#) Get a List of Message IDs in GMail User's Mailbox

Demonstrates how to get a list of message IDs in a GMail mailbox. The "userId" can be either the user's email address or the special value "me" to indicate the authenticated user.

For more information, see https://developers.google.com/gmail/api/v1/reference/users/messages/list

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

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Http http = new Chilkat.Http();

http.AuthToken = "ACCESS_TOKEN";

http.Accept = "application/json";

Chilkat.HttpResponse resp = http.QuickRequest("GET","https://www.googleapis.com/gmail/v1/users/userId/messages");
if (http.LastMethodSuccess != true) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

Debug.WriteLine("Response Status Code: " + Convert.ToString(resp.StatusCode));

Chilkat.JsonObject jsonResponse = new Chilkat.JsonObject();
jsonResponse.Load(resp.BodyStr);
jsonResponse.EmitCompact = false;
Debug.WriteLine(jsonResponse.Emit());

if (resp.StatusCode != 200) {
    Debug.WriteLine("Failed.");

    return;
}

// {
//   "messages": [
//     users.messages Resource
//   ],
//   "nextPageToken": string,
//   "resultSizeEstimate": unsigned integer
// }

string id;
string threadId;

int resultSizeEstimate = jsonResponse.IntOf("resultSizeEstimate");
int i = 0;
int count_i = jsonResponse.SizeOfArray("messages");
while (i < count_i) {
    jsonResponse.I = i;
    id = jsonResponse.StringOf("messages[i].id");
    threadId = jsonResponse.StringOf("messages[i].threadId");
    i = i + 1;
}