C#•4y ago

Email with attachments

I am trying to add attachments to an email, but its always null
In my mailDto i have IFormFile List to store the attachments, but from all my research in the frontend they use an IBrowserFile to show selected files. How can i send my IBrowserFile to my IFormFileList. I will attach screenshots for reference
If you need any more information, please ask! Thanks!

OObel I am trying to add attachments to an email, but its always null In my mailDto i ...

TeBeCo•10/4/22, 7:59 AM

IIRC it's super advised to stop using SmtpClient anymore

TeBeCo•10/4/22, 7:59 AM

TeBeCo•10/4/22, 7:59 AM

https://learn.microsoft.com/en-us/dotnet/api/system.net.mail.smtpclient?view=net-6.0

SmtpClient Class (System.Net.Mail)

Allows applications to send email by using the Simple Mail Transfer Protocol (SMTP). The SmtpClient type is obsolete on some platforms and not recommended on others; for more information, see the Remarks section.

TeBeCo•10/4/22, 7:59 AM

because ... proper reason like any form of modern stuff won't work

ObelOP•10/4/22, 8:06 AM

Would SendGrid be a better option?

ObelOP•10/4/22, 8:06 AM

SMTP was just the first i stumbled upon, seemed to have lots of documentation and guides

ObelOP•10/4/22, 8:11 AM

I am using Mailkit btw, just using an instance of SMTPClient for configuration of mail settings

TeBeCo•10/4/22, 8:15 AM

as the docs indicate, MailKit is one of the many other recommendation

OObel I am using Mailkit btw, just using an instance of SMTPClient for configuration o...

TeBeCo•10/4/22, 8:15 AM

though I'm surprised you also have

TeBeCo•10/4/22, 8:16 AM

unless ....

TeBeCo•10/4/22, 8:16 AM

that class is in fact the one from

TeBeCo•10/4/22, 8:16 AM

For SMTP, most developers use System.Net.Mail.SmtpClient which suits their needs more-or-less satisfactorily and so is probably not high on their list of needs. However, the SmtpClient implementation included with MailKit is a much better option if cross-platform support is needed or if the developer wants to be able to save and re-load MIME messages before sending them via SMTP. MailKit's SmtpClient also supports PIPELINING which should improve performance of sending messages (although might not be very noticeable).

TeBeCo•10/4/22, 8:16 AM

this paragraph is from docs

TeBeCo•10/4/22, 8:16 AM

so if your is from forget everything I said

ObelOP•10/4/22, 8:17 AM

Indeed it is using MailKit.Net.Smtp;

TeBeCo•10/4/22, 8:17 AM

then don't mind me

ObelOP•10/4/22, 8:17 AM

But also someone suggested SendGrid when i first started this email thingf

TeBeCo•10/4/22, 8:17 AM

it's sligtly more complicated

TeBeCo•10/4/22, 8:18 AM

just don't run your own MailServer

ObelOP•10/4/22, 8:22 AM

My only problem is frontend, in swagger everything works fine, but i need to figure out how i can take the uploaded files, and send them into my MailDTO list of attachments..

TeBeCo•10/4/22, 8:25 AM

regular upload

TeBeCo•10/4/22, 8:25 AM

temp storage

TeBeCo•10/4/22, 8:25 AM

and use that after

TeBeCo•10/4/22, 8:25 AM

$upload

TTeBeCo $upload

MODiX•10/4/22, 8:25 AM

In case you did not read the docs:
https://docs.microsoft.com/en-us/aspnet/core/mvc/models/file-uploads?view=aspnetcore-6.0
Client Code:

ServerCode:

The field's name in the body when doing the POST, needs to match the binded field in the Controler's Action
https://media.discordapp.net/attachments/569261465463160900/1001188081069735936/unknown.png

Upload files in ASP.NET Core

How to use model binding and streaming to upload files in ASP.NET Core MVC.

TeBeCo•10/4/22, 8:25 AM

that's with though ... so you would have to adapt

TeBeCo•10/4/22, 8:26 AM

and docs also show multi upload

TeBeCo•10/4/22, 8:26 AM

even though i would do that async and upload docs separatly with like ... DocsId + DocsByte + EmailId

TeBeCo•10/4/22, 8:26 AM

so you can track it all server side to prepare the mail

ObelOP•10/4/22, 8:27 AM

So you suggest uploading every file by itself, adding them 1 by one to the email?

TeBeCo•10/4/22, 8:28 AM

that's what most online mail UI does today

TeBeCo•10/4/22, 8:28 AM

"add an attachment" directly upload the moment you attach

TeBeCo•10/4/22, 8:28 AM

and you can see the progress bar per file

ObelOP•10/4/22, 8:29 AM

This is true

TeBeCo•10/4/22, 8:29 AM

so you need an info to track document per mail

TeBeCo•10/4/22, 8:29 AM

and documenet to it data

TeBeCo•10/4/22, 8:29 AM

and store it

TeBeCo•10/4/22, 8:29 AM

... until it's sent

TeBeCo•10/4/22, 8:29 AM

because for example ... DRAFT are stored a certain period of time (up to the code)

ObelOP•10/4/22, 8:29 AM

So i would create like an UploadResult model?

ObelOP•10/4/22, 8:29 AM

to hold the data

TeBeCo•10/4/22, 8:30 AM

whatever you want

TeBeCo•10/4/22, 8:30 AM

but you will need a way server side to reconciliate mail and all attachment + their name + their data

TeBeCo•10/4/22, 8:30 AM

based on ID probably

TeBeCo•10/4/22, 8:30 AM

and choose an appropriate Storage and an appropriate "eviction storage time"

TeBeCo•10/4/22, 8:31 AM

and probably warn the user if you keep the draft but purge the "temp attachment" or if their are not reachable anymore

ObelOP•10/4/22, 8:33 AM

Aight, its a bit more complicated than i anticipated with this email, i'll dig into it

ObelOP•10/4/22, 8:35 AM

So actually my first step is to upload the attachment, and then worrying about sending an email with it after

OObel Aight, its a bit more complicated than i anticipated with this email, i'll dig i...

TeBeCo•10/4/22, 8:39 AM

it honnestly depends what flexibility you want

TeBeCo•10/4/22, 8:40 AM

but having the file uploaded upfront will have more guaranty