Xamarin.Forms - Send Mail Using Xamarin Essentials

In this article, you will learn how to send mail Using Xamarin.Essentials in Xamarin Forms.

Introduction

Send Mail Using Xamarin Essentials
 
Xamarin.Forms code runs on multiple platforms - each of which has its own filesystem. This means that reading and writing files are most easily done using the native file APIs on each platform. Alternatively, embedded resources are a simpler solution to distribute data files with an app.

Xamarin.Essentials
Send Mail Using Xamarin Essentials 
Xamarin.Essentials plugin provides 20+ cross-platform APIs for mobile application development. Xamarin.Essentials API works with all Xamarin.Forms, Xamarin.Android, Xamarin.iOS, or UWP applications that can be accessed from shared code. Thanks to Xamarin.Essentials, developers can access every native platform API using C#. This plugin provides many APIs so initially, there is no need for more plugins for Xamarin. Xamarin.Essentials plugin impacts your app's minimum size.

Platform Support
 
Xamarin.Essentials supports platforms and operating systems,
 
 Platform Version
Android 4.4 (API 19) or earlier
 iOS 10.0 or higher
 UWP 10.0.16299.0 or earlier
  
Prerequisites
  • Visual Studio 2017(Windows or Mac)
Setting up a Xamarin.Forms Project

Start by creating a new Xamarin.Forms project. You’ll learn more by going through the steps yourself.

Choose the Xamarin.Forms App Project type under Cross-platform/App in the new project dialog.
 
Send Mail Using Xamarin Essentials 

Name your app, select “Use Portable Class Library” for shared code, and target both Android and iOS.

Send Mail Using Xamarin Essentials 

You probably want your project and solution to use the same name as your app. Put it in your preferred folder for projects and click create.

Send Mail Using Xamarin Essentials 

You now have a basic Xamarin.Forms app. Click the play button to try it out.

Send Mail Using Xamarin Essentials

Setting up the User Interface

Go to MainPage.Xaml and write the following code.
 
MainPage.xaml
  1. <?xml version="1.0" encoding="utf-8" ?>  
  2. <ContentPage xmlns="http://xamarin.com/schemas/2014/forms"  
  3.              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"  
  4.              xmlns:local="clr-namespace:XamarinEssentials"  
  5.              x:Class="XamarinEssentials.MainPage">  
  6.   
  7.     <StackLayout>  
  8.         <StackLayout HorizontalOptions="Center" VerticalOptions="Start">  
  9.          <Image Margin="0,50,0,0" x:Name="imgBanner" Source="banner.png" ></Image>  
  10.          <Image Margin="0,0,0,10" x:Name="imgXamarinEssential" Source="xamarinessential.png" ></Image>  
  11.          <Label Margin="0,0,0,10" FontAttributes="Bold" FontSize="Large" TextColor="#CA6F1E" HorizontalTextAlignment="Center" Text="Mail"></Label>  
  12.          <Entry x:Name="txtTo" Placeholder="someone@example.com"> </Entry>  
  13.          <Entry x:Name="txtSubject" Placeholder="Subject"> </Entry>  
  14.          <Editor x:Name="txtBody" HeightRequest="50" > </Editor>  
  15.          <Button x:Name="btnSend" Text="Send Mail" Clicked="btnSend_Clicked"/>  
  16.         </StackLayout>  
  17.     </StackLayout>  
  18.   
  19. </ContentPage>  
Add Xamarin Essentials
 
In this step, add Xamarin.Essentials to your project. You can install Xamarin.Essentials via NuGet, or you can browse the source code on GitHub.

Go to Solution Explorer and select your solution. Right-click and select "Manage NuGet Packages for Solution". Search "Xamarin.Essentials" and add Package. Remember to install it for each project (PCL, Android, iO, and UWP).

Send Mail Using Xamarin Essentials

Xamarin.Essentials requires platform-specific setup

Android,

The following steps are necessary for Android,
  1. Xamarin.Essentials support a minimum Android version of 4.4
  2. Target Android version for compiling must be 8.1, API level 27.
In the Android project's MainActivity that is launched, Xamarin.Essentials must be initialized in the OnCreate method.

MainActivity.cs
  1. Xamarin.Essentials.Platform.Init(this, bundle);  
Xamarin.Essentials must receive any OnRequestPermissionsResult. Write the following code for runtime permission.

MainActivity.cs
  1. public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)  
  2. {  
  3.     Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);  
  4.   
  5.     base.OnRequestPermissionsResult(requestCode, permissions, grantResults);  
  6. }  
iOS

No additional setup required.

UWP

No additional setup required.

Limitation
  • It supports the devices only, not Simulator/Emulator
In this step, write the following code for sending mail.

MainPage.xaml.cs
  1. using System.Threading.Tasks;  
  2. using Xamarin.Forms;  
  3. using Xamarin.Essentials;  
  4. namespace XamarinEssentials  
  5. {  
  6.     public partial class MainPage : ContentPage  
  7.     {  
  8.         public MainPage()  
  9.         {  
  10.             InitializeComponent();  
  11.         }  
  12.         protected override void OnAppearing()  
  13.         {  
  14.             base.OnAppearing();  
  15.         }  
  16.   
  17.         async void btnSend_Clicked(object sender, System.EventArgs e)  
  18.         {  
  19.             List<string> toAddress = new List<string>();  
  20.             toAddress.Add(txtTo.Text);  
  21.             await SendEmail(txtSubject.Text,txtBody.Text, toAddress);  
  22.         }  
  23.   
  24.         public async Task SendEmail(string subject, string body, List<string> recipients)  
  25.         {  
  26.             try  
  27.             {  
  28.                 var message = new EmailMessage  
  29.                 {  
  30.                     Subject = subject,  
  31.                     Body = body,  
  32.                     To = recipients,  
  33.                 };  
  34.                 await Email.ComposeAsync(message);  
  35.             }  
  36.             catch (FeatureNotSupportedException fbsEx)  
  37.             {  
  38.                 // Email is not supported on this device  
  39.             }  
  40.             catch (Exception ex)  
  41.             {  
  42.                 // Some other exception occurred  
  43.             }  
  44.         }  
  45.     }  
  46. }  
Click the play button to try it out.

Send Mail Using Xamarin Essentials

I hope you have understood how to send mail Using Xamarin Essentials in Xamarin.Forms.

Thanks for reading. Please share comments and feedback.