MS Graph SendMail with attachment - microsoft-graph-api

Question

I have problem to send an email with attachment.
Without attachment it works.
If I use the same function and add an attachment to the message I get the following error message:
Code: ErrorRequiredPropertyMissing Message: Required property is missing. ClientRequestId: 2af....
I am using MS Graph v4.0.30319
What am I doing wrong
public static async Task<String> SendMyMailAsync()
{
try
{
var FromSender = new Microsoft.Graph.Recipient()
{
EmailAddress = new Microsoft.Graph.EmailAddress
{
Address = "EarlyBird#mail.com"
}
};
byte[] contentBytes = System.IO.File.ReadAllBytes(#"C:\Users\me\Desktop\Test.pdf");
String bs64 = Convert.ToBase64String(contentBytes);
var attachment = new FileAttachment
{
AdditionalData = new Dictionary<string, object>()
{
{"#odata.type","#microsoft.graph.fileAttachment"}
},
//ODataType = "#microsoft.graph.fileAttachment",
ContentType = "application/pdf",
Name = "Test.pdf",
ContentBytes = Convert.FromBase64String(bs64),
IsInline = false,
Size = bs64.Length,
ContentId = "TestMail",
LastModifiedDateTime = DateTime.Now,
Id = "HSDJHEWuDSjfkkfGt",
};
Microsoft.Graph.Message message = new Microsoft.Graph.Message
{
Sender = FromSender,
From = FromSender,
Subject = "Mail no1",
Importance = Microsoft.Graph.Importance.Normal,
Body = new Microsoft.Graph.ItemBody
{
ContentType = Microsoft.Graph.BodyType.Html,
Content = "Hello World",
},
ToRecipients = new List<Microsoft.Graph.Recipient>()
{
new Microsoft.Graph.Recipient
{
EmailAddress = new Microsoft.Graph.EmailAddress
{
Address = "EarlyBird#MailNo2.com"
}
}
},
Attachments = new MessageAttachmentsCollectionPage(),
};
// -- If I comment this out I can send the mail without error but without attachment----
message.Attachments.Add(attachment);
message.HasAttachments = true;
//-----------------------------------------------------------------
var request = graphClient.Me.SendMail(message, true);
// Messages[message.Id].Send();// SendMail(message, null);
await request.Request().PostAsync();
return "Mail send OK";
}
catch (ServiceException ex)
{
Console.WriteLine($"Error getting events: {ex.Message}");
return "Send mail error";
}
}

Answer 1

The below code works perfectly fine for me
public static async Task<String> SendMyMailAsync()
{
try
{
var FromSender = new Microsoft.Graph.Recipient()
{
EmailAddress = new Microsoft.Graph.EmailAddress
{
Address = "Shiva#nishantsingh.live"
}
};
byte[] contentBytes = System.IO.File.ReadAllBytes(#"C:\Users\Shiva\Desktop\sample.pdf");
String bs64 = Convert.ToBase64String(contentBytes);
var attachment = new FileAttachment
{
AdditionalData = new Dictionary<string, object>()
{
{"#odata.type","#microsoft.graph.fileAttachment"}
},
ContentType = "application/pdf",
Name = "Test.pdf",
ContentBytes = Convert.FromBase64String(bs64),
IsInline = false,
Size = bs64.Length,
ContentId = "TestMail",
LastModifiedDateTime = DateTime.Now,
Id = "HSDJHEWuDSjfkkfGt",
};
Microsoft.Graph.Message message = new Microsoft.Graph.Message
{
Sender = FromSender,
From = FromSender,
Subject = "Mail no1",
Importance = Microsoft.Graph.Importance.Normal,
Body = new Microsoft.Graph.ItemBody
{
ContentType = Microsoft.Graph.BodyType.Html,
Content = "Hello World",
},
ToRecipients = new List<Microsoft.Graph.Recipient>()
{
new Microsoft.Graph.Recipient
{
EmailAddress = new Microsoft.Graph.EmailAddress
{
Address = "Shiva#nishantsingh.live"
}
}
},
Attachments = new MessageAttachmentsCollectionPage(),
};
message.HasAttachments = true;
message.Attachments.Add(attachment);
var request = graphClient.Me.SendMail(message, true);
await request.Request().PostAsync();
return "Mail send OK";
}
catch (ServiceException ex)
{
Console.WriteLine($"Error getting events: {ex.Message}");
return "Send mail error";
}
}
You need to make sure that you have the PDF file path correctly specified and the fromSender variable will obviously be yours as you are calling me/sendMail. If you want to send mail from other user's mailbox then you need to have client credential flow setup so that it can give you an App-only token which should have required permissions and you need to change the call something like this var request = graphClient.Users["userid/UPN"].SendMail(message, true);.

Answer 2

I have just updated the MS Graph preview version from
4.0.0-preview.1
to
4.0.0-preview.2
Now everything works as expected
I think it was a bug in preview.1