Sending an email with attachment in Xamarin.Forms for Android and iOS - xamarin

Question

I am creating an app to send an email with an attachment. I have tried using mailTo to do it but it is not working. Are there any other ways to send an email with attachment?
This is the code that I have tried so far
private void Button_Clicked_1(object sender, EventArgs e)
{
string toEmail = "toemail#nyp.edu.sg";
string emailSubject = "Test Email";
string emailBody = "Email Body";
string attachment = "C:/Users/L30901/Desktop/download.jpg";
Device.OpenUri(new Uri(String.Format("mailto:{0}?subject={1}&body={2}&attachment=file:///{3}", toEmail, emailSubject, emailBody, attachment)));
}
This is what I did for iOS
MainPage.xaml.cs
private void Button_Clicked_1(object sender, EventArgs e)
{
DependencyService.Get<IDependency>().SendEmail();
}
IDependency.cs
public interface IDependency
{
void SendEmail();
}
IOSEmail.cs
[assembly: Dependency(typeof(IOSEmail))]
namespace Notification.iOS
{
public class IOSEmail : IDependency
{
MFMailComposeViewController mailController;
public void SendEmail()
{
if (MFMailComposeViewController.CanSendMail)
{
mailController = new MFMailComposeViewController();
mailController.SetToRecipients(new string[] { "some.person#somewhere.com" });
mailController.SetSubject("Testing");
mailController.SetMessageBody("See attached file", false);
NSData data = NSData.FromFile(pdffilename);
mailController.AddAttachmentData(data, "application/jpeg", "xxxxx.jpg");// For JPEG
mailController.Finished += HandleMailFinished;
UIApplication.SharedApplication.KeyWindow.RootViewController.PresentViewController(mailController, true, null);
}
}
private void HandleMailFinished(object sender, MFComposeResultEventArgs e)
{
e.Controller.DismissViewController(true, null);
}

Answer 1

What you need to do can only be done using Xamarin.Forms DependencyService:
For Android you need to do something like this:
Get the Directory of your attachment using Java.IO:
Java.IO.File dir = Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryDownloads);
Note: I have used the downloads directory you can change it as per your need at any point in time.
Once you are done with picking that directory using Android OS environment then pick the file something like this;
Java.IO.File file = new Java.IO.File(dir, "yourFile.pdf"); //This could be any other type of file aswell
Get the URI of that Android file something like this:
Android.Net.Uri path = Android.Net.Uri.FromFile(file);
Create the Intent to send the data from to your Emailing app something like this:
var email = new Intent(Android.Content.Intent.ActionSend);
email.PutExtra(Android.Content.Intent.ExtraEmail,
new string[] { "some.person#somewhere.com" }); // to whom you want to send the email
email.PutExtra(Android.Content.Intent.ExtraCc,
new string[] { "some.person#somewhereelse.com" }); // to whom you want to Copy in the email (CC)
email.PutExtra(Android.Content.Intent.ExtraSubject, "Awesome File");
email.PutExtra(Android.Content.Intent.ExtraText,
"See attached file");
email.PutExtra(Intent.ExtraStream, path);
email.SetType("message/rfc822");
StartActivity(email);
For IOS you need to do something like this:
Create an instance of MFMailComposeViewController and add a subject and message body to it;
var mailer= new MFMailComposeViewController();
mailer.SetSubject("xxxx");
mailer.SetMessageBody("", true);
mailer.Finished += HandleMailFinished; //This controllers finished event in case you need it
Now it is mandatory that you have your file in the document directory for it to be available to the application for more information check Working with the File System
Assuming that you read that and you have added the file to the document directory of your application get the NSData for your attachment:
NSData data = NSData.FromFile(pdfFileName);
mailer.AddAttachmentData(data, "application/pdf", "xxxxx.pdf");// For PDF
mail.AddAttachmentData(csvdata, "application/csv", "csv.txt"); // For CSV/TXT
Get the currently displayed Viewcontroller something like this:
public UIViewController GetCurrentUIController()
{
UIViewController viewController;
var window = UIApplication.SharedApplication.KeyWindow;
if (window == null)
{
return null;
}
if (window.RootViewController.PresentedViewController == null)
{
window = UIApplication.SharedApplication.Windows
.First(i => i.RootViewController != null &&
i.RootViewController.GetType().FullName
.Contains(typeof(Xamarin.Forms.Platform.iOS.Platform).FullName));
}
viewController = window.RootViewController;
while (viewController.PresentedViewController != null)
{
viewController = viewController.PresentedViewController;
}
return viewController;
}
Then Present the Viewcontroller something like this:
var _CurrentViewComtroller= GetCurrentUIController();
_CurrentViewComtroller?.PresentViewController(mailer, true, null);
The Handled Finish method would be something like this:
private void HandleMailFinished(object sender, MFComposeResultEventArgs args)
{
DismissViewController (true, null);
}