CODEWITHSUNDEEP
c#.net-coremicrosoft-graph-apimicrosoft-graph-mail
jay
jay

Reputation: 1175

Get all email message using Microsoft Graph API in c#

I have the following functions to get messages using Graph API

var client = new GraphServiceClient(authenticationProvider);
var messages = await client.Users["[email protected]"].Messages
     .Request()
     .GetAsync();

I am only able to get the latest 10 messages. How do I get all the messages? I tried to have a look at the microsoft documentation here: https://learn.microsoft.com/en-us/graph/api/message-get?view=graph-rest-1.0&tabs=csharp but unable to find any clues.

Upvotes: 4

Views: 16506

Answers (4)

JayChase
JayChase

Reputation: 11525

There is now a PageIterator included in the Microsoft Graph SDK that can be used to eager load all pages.

var messages = await graphClient.Me.Messages
    .GetAsync(requestConfiguration =>
    {
        requestConfiguration.QueryParameters.Top = 10;
        requestConfiguration.QueryParameters.Select =
            ["sender", "subject", "body"];
        requestConfiguration.Headers.Add(
            "Prefer", "outlook.body-content-type=\"text\"");
    });

if (messages == null)
{
    return;
}

var pageIterator = PageIterator<Message, MessageCollectionResponse>
    .CreatePageIterator(
        graphClient,
        messages,
        // Callback executed for each item in
        // the collection
        (msg) =>
        {
            Console.WriteLine(msg.Subject);
            return true;
        },
        // Used to configure subsequent page
        // requests
        (req) =>
        {
            // Re-add the header to subsequent requests
            req.Headers.Add("Prefer", "outlook.body-content-type=\"text\"");
            return req;
        });

await pageIterator.IterateAsync();

Upvotes: 0

jay
jay

Reputation: 1175

Found the answer after googling and trial error.

IUserMessagesCollectionPage msgs = await _client.Users[[email protected]].Messages.Request()
                .Filter("put your filter here")
                .GetAsync();
            List<Message> messages = new List<Message>();
            messages.AddRange(msgs.CurrentPage);
            while (msgs.NextPageRequest != null)
            {
                msgs = await msgs.NextPageRequest.GetAsync();
                messages.AddRange(msgs.CurrentPage);
            }

Upvotes: 7

Ivan Gechev
Ivan Gechev

Reputation: 712

You can do it with .Top():

var client = new GraphServiceClient(authenticationProvider);
var messages = await client.Users["[email protected]"].Messages
     .Request()
     .Top(100)
     .GetAsync();

Upvotes: 2

Carl Zhao
Carl Zhao

Reputation: 9519

I think you should refer to this document:

Depending on the page size and mailbox data, getting messages from a mailbox can incur multiple requests. The default page size is 10 messages. To get the next page of messages, simply apply the entire URL returned in @odata.nextLink to the next get-messages request. This URL includes any query parameters you may have specified in the initial request.

Upvotes: 0

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