Stripe payment gateway In xamarin forms

CreditCardModel.cs

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Text;

namespace Nonco.Model.PaymentGatway
{
   public class CreditCardModel
   {
        [JsonProperty("exp_month")]
        public long? ExpMonth { get; set; }
        [JsonProperty("exp_year")]
        public long? ExpYear { get; set; }
        [JsonProperty("number")]
        public string Number { get; set; }
        [JsonProperty("address_city")]
        public string AddressCity { get; set; }
        [JsonProperty("address_country")]
        public string AddressCountry { get; set; }
        [JsonProperty("address_line1")]
        public string AddressLine1 { get; set; }
        [JsonProperty("address_line2")]
        public string AddressLine2 { get; set; }
        [JsonProperty("address_state")]
        public string AddressState { get; set; }
        [JsonProperty("address_zip")]
        public string AddressZip { get; set; }
        [JsonProperty("currency")]
        public string Currency { get; set; }
        [JsonProperty("cvc")]
        public string Cvc { get; set; }
        [JsonProperty("name")]
        public string Name { get; set; }
        [JsonProperty("metadata")]
        public object MetaData { get; set; }
        [JsonProperty("issuing_card")]
        public string IssuingCardId { get; set; }
   }
}

PaymentGatwayPageViewModel.cs

using Acr.UserDialogs;
using Nonco.Model.PaymentGatway;
using Nonco.Views.InfoPage;
using Prism.Commands;
using Prism.Mvvm;
using Prism.Navigation;
using Stripe;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Xamarin.Forms;

namespace Nonco.ViewModels
{
    public class PaymentGatwayPageViewModel : BindableBase
    {
        #region Variable

        private CreditCardModel _creditCardModel;
        private TokenService Tokenservice;
        private Token stripeToken;
        private bool _isCarcValid;
        private bool _isTransectionSuccess;
        private string _expMonth;
        private string _expYear;
        private string _title;

        #endregion Variable

        #region Public Property
        private string StripeTestApiKey = "{Your Stripe Api Key}";
        public string ExpMonth
        {
            get { return _expMonth; }
            set { SetProperty(ref _expMonth, value); }
        }

        public bool IsCarcValid
        {
            get { return _isCarcValid; }
            set { SetProperty(ref _isCarcValid, value); }
        }

        public bool IsTransectionSuccess
        {
            get { return _isTransectionSuccess; }
            set { SetProperty(ref _isTransectionSuccess, value); }
        }

        public string Title
        {
            get { return _title; }
            set { SetProperty(ref _title, value); }
        }

        public string ExpYear
        {
            get { return _expYear; }
            set { SetProperty(ref _expYear, value); }
        }

        public CreditCardModel CreditCardModel
        {
            get { return _creditCardModel; }
            set { SetProperty(ref _creditCardModel, value); }
        }

        #endregion Public Property

        #region Constructor

        public PaymentGatwayPageViewModel()
        {
            CreditCardModel = new CreditCardModel();
            Title = "Card Details";
        }

        #endregion Constructor

        #region Command

        public DelegateCommand SubmitCommand => new DelegateCommand(async () =>
        {
                CreditCardModel.ExpMonth = Convert.ToInt64(ExpMonth);
                CreditCardModel.ExpYear = Convert.ToInt64(ExpYear);
                CancellationTokenSource tokenSource = new CancellationTokenSource();
                CancellationToken token = tokenSource.Token;
            try
            {
                UserDialogs.Instance.ShowLoading("Payment processing..");
                await Task.Run(async () =>
                {

                    var Token = CreateToken();
                    Console.Write("Payment Gateway" + "Token :" + Token);
                    if (Token != null)
                    {
                        IsTransectionSuccess = MakePayment(Token);
                    }
                    else
                    {
                        UserDialogs.Instance.Alert("Bad card credentials", null, "OK");
                    }
                });
            }
            catch (Exception ex)
            {
                UserDialogs.Instance.HideLoading();
                UserDialogs.Instance.Alert(ex.Message, null, "OK");
                 Console.Write("Payment Gatway" + ex.Message);
            }
            finally
            {
                if (IsTransectionSuccess)
                {
                     Console.Write("Payment Gateway" + "Payment Successful ");
                    
                    UserDialogs.Instance.HideLoading();
                }
                else
                {
                  
                    UserDialogs.Instance.HideLoading();
                    UserDialogs.Instance.Alert("Oops, something went wrong","Payment failed","OK");
                    Console.Write("Payment Gateway" + "Payment Failure ");
                }
            }
        
        });

        #endregion Command

        #region Method

        private string CreateToken()
        {
            try
            {
                StripeConfiguration.SetApiKey(StripeTestApiKey);
                var service = new ChargeService();
                var Tokenoptions = new TokenCreateOptions
                {
                    Card = new CreditCardOptions
                    {
                        Number = CreditCardModel.Number,
                        ExpYear = CreditCardModel.ExpYear,
                        ExpMonth = CreditCardModel.ExpMonth,
                        Cvc = CreditCardModel.Cvc,
                        Name = "Sonu Sharma",
                        AddressLine1 = "18",
                        AddressLine2 = "SpringBoard",
                        AddressCity = "Gurgoan",
                        AddressZip = "284005",
                        AddressState = "Haryana",
                        AddressCountry = "India",
                        Currency = "inr",
                    }
                };

                Tokenservice = new TokenService();
                stripeToken = Tokenservice.Create(Tokenoptions);
                return stripeToken.Id;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        public bool MakePayment(string token)
        {
            try
            {
                StripeConfiguration.SetApiKey(StripeSecreatApiKey);
                var options = new ChargeCreateOptions
                {
                    Amount = (long)float.Parse("20000"), 
                    Currency = "inr",
                    Description = "Charge for [email protected]",
                    SourceId = stripeToken.Id,
                    StatementDescriptor = "Custom descriptor",
                    Capture = true,
                    ReceiptEmail = "[email protected]",
                };
                //Make Payment
                var service = new ChargeService();
                Charge charge = service.Create(options);
                return true;
            }
            catch (Exception ex)
            {
                Console.Write("Payment Gatway (CreateCharge)"+ ex.Message);
                throw ex;
            }
        }

        private bool ValidateCard()
        {
            if (CreditCardModel.Number.Length == 16 && ExpMonth.Length == 2 && ExpYear.Length == 2 && CreditCardModel.Cvc.Length == 3)
            {
            }
            return true;
        }

        #endregion Method
    }
}

StripePaymentGatwayPage.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:prism="clr-namespace:Prism.Mvvm;assembly=Prism.Forms"
             prism:ViewModelLocator.AutowireViewModel="True"
             x:Class="Nonco.Views.InfoPage.PaymentGatwayPage">
    <NavigationPage.TitleView>
        <Grid HorizontalOptions="FillAndExpand">
            <Image Source="HeaderLogo" Aspect="AspectFit" HorizontalOptions="Center" VerticalOptions="Center"  Margin="-60,0,0,0"/>
        </Grid>
    </NavigationPage.TitleView>
    <ContentView>
        <StackLayout VerticalOptions="FillAndExpand">
         <Grid HorizontalOptions="Center"  Padding="20,20,20,0" ColumnSpacing="20">
            <Grid.RowDefinitions >
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="*"/>
                <RowDefinition Height="50"/>
         
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="1*"/>
                <ColumnDefinition Width="1*"/>
            </Grid.ColumnDefinitions>
      
            <StackLayout Grid.Row="0" Grid.ColumnSpan="2">
                <Entry x:Name="CardNumber" Placeholder="  Enter card  number"  Text="{Binding CreditCardModel.Number}"  ReturnType="Next" 
                                      Completed="CardNumber_Completed"  TextChanged="CardNumber_TextChanged" Keyboard="Keyboard.Numeric"/>
                <Label x:Name="ErrorLabel_CardNumber"  IsVisible="{Binding IsError_CardNumber}" TextColor="Red" FontSize="13" />
            </StackLayout>


            <StackLayout  Grid.Row="1" Grid.Column="0">
                <Entry x:Name="Month" Placeholder="  MM" Text="{Binding ExpMonth}"  ReturnType="Next" Keyboard="Keyboard.Numeric"
                                      Completed="Month_Completed" TextChanged="Month_TextChanged"/>
                <Label x:Name="ErrorLabel_Month"  IsVisible="{Binding IsError_Month}"  TextColor="Red" FontSize="13"/>
            </StackLayout>

            <StackLayout  Grid.Row="1" Grid.Column="1">
                <Entry x:Name="Year" Placeholder="  YY"  Text="{Binding ExpYear}"   ReturnType="Next"
                                      Completed="Year_Completed" TextChanged="Year_TextChanged" Keyboard="Keyboard.Numeric"/>
                <Label x:Name="ErrorLabel_Year" Text="year can be empty !!" IsVisible="{Binding IsError_Year}"  TextColor="Red" FontSize="13"/>
            </StackLayout>
            <StackLayout Grid.Row="2" Grid.ColumnSpan="2">
                <Entry x:Name="Cvv" Placeholder="  Cvv code" Text="{Binding CreditCardModel.Cvc}"  ReturnType="Next" 
                                      Completed="Cvv_Completed" TextChanged="Cvv_TextChanged" Keyboard="Keyboard.Numeric"/>
                <Label x:Name="ErrorLabel_Cvv" Text="CVV can not be empty !!" IsVisible="{Binding IsError_Cvv}" TextColor="Red" FontSize="13" />
            </StackLayout>
           
        </Grid>
         <StackLayout HorizontalOptions="FillAndExpand" VerticalOptions="End" >
             <Button x:Name="Submit_Button" BorderRadius="0"  Text="Submit" Command="{Binding SubmitCommand}" HorizontalOptions="FillAndExpand" VerticalOptions="EndAndExpand"/>
         </StackLayout>
        </StackLayout>
    </ContentView>
</ContentPage>  

StripePaymentGatwayPage.xaml.cs

using System;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

namespace Nonco.Views.InfoPage
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class PaymentGatwayPage : ContentPage
    {
        public PaymentGatwayPage()
        {
            InitializeComponent();
        }

        protected override void OnAppearing()
        {
            Submit_Button.IsEnabled = false;
            ErrorLabel_CardNumber.IsVisible = false;
            ErrorLabel_Cvv.IsVisible = false;
            ErrorLabel_Month.IsVisible = false;
            ErrorLabel_Year.IsVisible = false;
        }
        private void CardNumber_TextChanged(object sender, TextChangedEventArgs e)
        {
            if (CardNumber.Text.Length > 16)
            {
                ErrorLabel_CardNumber.IsVisible = true;
                CardNumber.Text = RemoveLastCharacter(CardNumber.Text);
                ErrorLabel_CardNumber.Text = "Invalid Card number";
            }
            else if (CardNumber.Text.Length < 1)
            {
                ErrorLabel_CardNumber.IsVisible = true;
                ErrorLabel_CardNumber.Text = "Card number can not be empty !!";

            }
            else
            {
                ErrorLabel_CardNumber.IsVisible = false;

            }
            EnableSubmitButton();
        }
        private void CardNumber_Completed(object sender, System.EventArgs e)
        {
            if (CardNumber.Text.Length > 16 || CardNumber.Text.Length < 12)
            {
                ErrorLabel_CardNumber.IsVisible = true;
                ErrorLabel_CardNumber.Text = "Invalid Card number";
                EnableSubmitButton();
            }
            else
            {
                ErrorLabel_CardNumber.IsVisible = false;
            }
            CardNumber.Unfocus();
            Month.Focus();
            EnableSubmitButton();
        }

        private void Month_TextChanged(object sender, TextChangedEventArgs e)
        {
            if (Month.Text.Length < 1)
            {
                ErrorLabel_Month.IsVisible = true;
                ErrorLabel_Month.Text = "month can not be empty !!";
            }
            else if (Month.Text.Length > 2)
            {
                Month.Text = RemoveLastCharacter(Month.Text);
                ErrorLabel_Month.IsVisible = true;
                ErrorLabel_Month.Text = "Invalid month !!";
            }
            else
            {
                ErrorLabel_Month.IsVisible = false;
                EnableSubmitButton();
            }
            EnableSubmitButton();
        }
        private void Month_Completed(object sender, System.EventArgs e)
        {
            Month.Unfocus();
            Year.Focus();
        }

        private void Year_TextChanged(object sender, TextChangedEventArgs e)
        {
            if (Year.Text.Length < 1)
            {
                ErrorLabel_Year.IsVisible = true;
                ErrorLabel_Year.Text = "month can not be empty !!";
            }
            else if (Year.Text.Length > 2)
            {
                Year.Text = RemoveLastCharacter(Year.Text);
                ErrorLabel_Year.IsVisible = true;
                ErrorLabel_Year.Text = "Invalid year !!";
            }
            else
            {
                ErrorLabel_Year.IsVisible = false;
                EnableSubmitButton();
            }
            EnableSubmitButton();
        }
        private void Year_Completed(object sender, System.EventArgs e)
        {
            Year.Unfocus();
            Cvv.Focus();
        }

        private void Cvv_TextChanged(object sender, TextChangedEventArgs e)
        {
            if (Cvv.Text.Length < 1)
            {
                ErrorLabel_Cvv.IsVisible = true;
                ErrorLabel_Cvv.Text = "CVV can not be empty !!";
            }
            else if (Cvv.Text.Length > 3)
            {
                Cvv.Text = RemoveLastCharacter(Cvv.Text);
                ErrorLabel_Cvv.IsVisible = true;
                ErrorLabel_Cvv.Text = "Invalid Cvv !!";
            }
            else
            {
                ErrorLabel_Cvv.IsVisible = false;
                EnableSubmitButton();
            }

            EnableSubmitButton();
        }
        private void Cvv_Completed(object sender, System.EventArgs e)
        {
            Cvv.Unfocus();
        }

        private void EnableSubmitButton()
        {
            if (ErrorLabel_CardNumber.IsVisible || ErrorLabel_Cvv.IsVisible || ErrorLabel_Month.IsVisible || ErrorLabel_Year.IsVisible)
            {
                Submit_Button.IsEnabled = false;
            }
            else
            {
                Submit_Button.IsEnabled = true;
            }
        }
        private string RemoveLastCharacter(string str)
        {
            int l = str.Length;
            string  text = str.Remove(l-1,1);
            return text;
        }
    }
}

Hi, TheAlphamerc,
Can I use this code on Xamarin Android project?
I tried it to use, but when call tokenService.Create(tokenoption), it gives me error that says "System.ArgumentException: Get Method not found for 'Card' at System.Reflection.RuntimePropertyInfo.GetValue ........".

Hi, TheAlphamerc, Can I use this code on Xamarin Android project? I tried it to use, but when call tokenService.Create(tokenoption), it gives me error that says "System.ArgumentException: Get Method not found for 'Card' at System.Reflection.RuntimePropertyInfo.GetValue ........".

This code doesn't support Xamarin android. It will only works with xamarin form.