Sending an email with attachment using SendGrid

Question

 var myMessage = new SendGridMessage();
            myMessage.From = new MailAddress("info@email.com");
            myMessage.AddTo("Cristian <myemail@email.com>");
            myMessage.Subject = user.CompanyName + "has selected you!";
            myMessage.Html = "<p>Hello World!</p>";
            myMessage.Text = "Hello World plain text!";

           // myMessage.AddAttachment("C:\test\test.txt");



            var apiKey = "";
            var transportWeb = new Web(apiKey);
            transportWeb.DeliverAsync(myMessage);

Basically I can make the email work, and the moment I attempt to add an attachment it doesn't send it. I tried different paths and different ways of writing the path, I am not sure what is going wrong, every single tutorial I have found shows it should work like this.

did you got any error message? – Midhun Mundayadan Jun 21 '16 at 13:16 — Midhun Mundayadan, Jun 21 '16 at 13:16

score 11 · Accepted Answer · answered Jun 21 '16 at 13:23

11

I got it to work, turns out I just needed a virtual path:

myMessage.AddAttachment(Server.MapPath(@"~\img\logo.png"));

answered Jun 21 '16 at 13:23

crystyxn

819
2
16
39

score 7 · Answer 2 · answered Jun 21 '16 at 13:17

7

\ it is a escape character

//Initialize with a regular string literal.

myMessage.AddAttachment(@"C:\test\test.txt");

else // Initialize with a verbatim string literal.

myMessage.AddAttachment("C:\\test\\test.txt");

answered Jun 21 '16 at 13:17

Midhun Mundayadan

3,023
3
17
29

score 6 · Answer 3 · answered Mar 29 '19 at 10:12

attach blob reference doc using sendgrid

mail.AddAttachment(AzureUploadFileClsName.MailAttachmentFromBlob("DocName20190329141433.pdf"));

common method you can create as below one.

public static Attachment MailAttachmentFromBlob(string docpath)
    {
        CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
        CloudBlobContainer container = blobClient.GetContainerReference(storageContainer);
        CloudBlockBlob blockBlob = container.GetBlockBlobReference(docpath);
        blockBlob.FetchAttributes();
        long fileByteLength = blockBlob.Properties.Length;
        byte[] fileContent = new byte[fileByteLength];
        for (int i = 0; i < fileByteLength; i++)
        {
            fileContent[i] = 0x20;
        }
        blockBlob.DownloadToByteArray(fileContent, 0);

        return new Attachment{ Filename = "Attachmentname",
            Content = Convert.ToBase64String(fileContent),
            Type = "application/pdf",
            ContentId = "ContentId" };

    }

score 3 · Answer 4 · answered Apr 01 '20 at 16:04

You can add multiple files

       var msg = MailHelper.CreateSingleEmail(from, to, subject, null, content);

        byte[] byteData = Encoding.ASCII.GetBytes(File.ReadAllText(filePath));
        msg.Attachments = new List<SendGrid.Helpers.Mail.Attachment>
        {
            new SendGrid.Helpers.Mail.Attachment
            {
                Content = Convert.ToBase64String(byteData),
                Filename = "FILE_NAME.txt",
                Type = "txt/plain",
                Disposition = "attachment"
            }
        };

score 2 · Answer 5 · answered Feb 18 '21 at 11:40

This's the complete example:

static async Task ExecuteStreamAttachmentAdd()
    {
        var apiKey = Environment.GetEnvironmentVariable("NAME_OF_THE_ENVIRONMENT_VARIABLE_FOR_YOUR_SENDGRID_KEY");
        var client = new SendGridClient(apiKey);
        var from = new EmailAddress("test@example.com");
        var subject = "Subject";
        var to = new EmailAddress("test@example.com");
        var body = "Email Body";
        var msg = MailHelper.CreateSingleEmail(from, to, subject, body, "");

        using (var fileStream = File.OpenRead("C:\\Users\\username\\file.txt"))
        {
            await msg.AddAttachmentAsync("file.txt", fileStream);
            var response = await client.SendEmailAsync(msg);
        }
    }

Sending an email with attachment using SendGrid

5 Answers5

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