---
title: [Livestream] Adding .NET Core server to Stripe Sample
slug: livestream-adding-net-core-server-to-stripe-sample
published_at: 2021-01-29 23:45:02 +0000
updated_at: 2026-03-04 20:14:32 +0000
summary: 
description: Follow along to see how to add support for a .NET core server option to a brand new Stripe Sample.
tags: []
views: 193
author: CJ Avilla
url: https://www.cjav.dev/videos/livestream-adding-net-core-server-to-stripe-sample
youtube_url: https://www.youtube.com/watch?v=aJtOw0Ms7vE
youtube_id: aJtOw0Ms7vE
embed_url: https://www.youtube.com/embed/aJtOw0Ms7vE
thumbnail_url: https://i.ytimg.com/vi/aJtOw0Ms7vE/hqdefault.jpg
type: video
---

# [Livestream] Adding .NET Core server to Stripe Sample

*Published: January 29, 2021*
*Views: 193*

## Watch

[Watch on YouTube](https://www.youtube.com/watch?v=aJtOw0Ms7vE)

[![[Livestream] Adding .NET Core server to Stripe Sample](https://i.ytimg.com/vi/aJtOw0Ms7vE/hqdefault.jpg)](https://www.youtube.com/watch?v=aJtOw0Ms7vE)

## Description

Follow along to see how to add support for a .NET core server option to a brand new Stripe Sample.

## Transcript

okay so today i&#39;m going to add a couple of servers to accept a payment the first one i&#39;m going to do is a net core example so this is a brand new stripe sample for accepting a payment using a variety of different payment methods and so right now the sample looks like this we have a custom payment flow integration type and inside of that we have a client directory with a few different options for implementing the client side we have a server directory for implementing several different servers so the one we&#39;re going to add now is for net and this will be a.net console application and i&#39;m going to copy a an existing one from one of our checkout one-time payments custom payment flow server.net so i&#39;m gonna i&#39;m gonna copy an existing solution from another sample into this custom payment flow one and then we&#39;ll go look at the custom payment flow um implementation here so in the dotnet server we have just a dot net i&#39;m sorry it&#39;s not a net console application it&#39;s a net mvc application and so if we start in startup we have some environment variables that the other sample used that we do not need to use including these three arguments we just need publishable key secret key and webhook signing secret and so before we go too far i&#39;m also going to update this stripe options object to only accept these three in our controller we are not going to have anything about checkout anymore so i&#39;m actually just going to delete these methods let&#39;s see our config is going to return just the publishable key from and that will be loaded here like so and now we can go to our config response and make it so that we only are responding with the publishable key publishable key that&#39;s the pattern and convention that this specific sample uses uh so when we receive a get request for slash config we expect that the publishable key is returned so if i jumped into um custom custom payment flow server.net then here i could run dot net run program.cs and before i do that i actually want to i&#39;m going to change i&#39;m going to change the um the stripe version so dotnet package remove stripe.net because this always trips me up remove package the ordering of those commands is always super weird to me okay so we&#39;re removing stripe.net and then i want to add it back this is i think this is the only way to like upgrade the version to uh to latest so um so i want to make sure that we&#39;re on the latest version of stripe.net i&#39;m going to try running dot net run program dot again this should start up our.net mvc application and it didn&#39;t it crashed because i changed that name from that to that so let&#39;s see accept a payment all right so jumping back into our implementation here in the controller in the payments controller i renamed this to publishable key so that should work let&#39;s see so if we try to run the program again we&#39;re getting a warning that says the async method lacks in a weight operator that&#39;s because we&#39;re not actually calling a weight in here so i think we can just have this return a config response um let&#39;s see parameter web root ah right okay so the web root um actually yeah okay so i need to recall okay so we do have okay so i i messed up i removed one setting that we actually still do need okay web root where did you go use webroot get the environment variable static dir so that that actually does need to be set and so i&#39;m actually i&#39;m going to what am i going to do i&#39;m going to copy so in the root of the dot net server implementation we need to have a file called dot end so i&#39;m going to go into custom payment flow servers.net and i&#39;m going to copy the one that i have in the ruby server in here and we&#39;ll take a look at what that looks like so dot end looks like this these are my api keys i have us keys and keys from malaysia so that we can test fpx but this was the the key right here was that we needed this static directory defined in our end environment variables now in practice if you&#39;re going through this there should be a dot m dot example in the root of the application and there is here so you can copy that diamond.example rename it to dot end and put it in the root of your server directory so in this case it&#39;s going to be here inside of custom paymentflowserver.net and it&#39;ll be named.n all right so let&#39;s try this again so we&#39;re going to run program.cs now that that web root what it defines is the path to the client files so where the front end where the front end code is running now if i go to localhost 4242 i should see the sample and here it is it&#39;s looking grand okay so what&#39;s next i actually have some tests that i can run um they&#39;re written in r specs i can say r spec spec and these will run ruby tests against our server and then come back with some errors so we&#39;re passing a couple tests already but the full integration path to slash create payment intent creates a payment intent with uh for card with usd so right now we don&#39;t actually support any post request for this endpoint that we need to add for creating a payment intent so again a payment intent is a represents an intent for someone to purchase something one of your customers so create payment intent and we&#39;re going to respond with a payment intent response and i&#39;m going to make this one async because we can use a wait um when we&#39;re making the call to create the payment intent so if we pull up the docs for creating a payment intent and today we are ah way too big oh my gosh can&#39;t see anything create a payment intent we are working oh my word we are working in net and this is what it looks like so i&#39;m just going to copy that and cool our amount 20 that&#39;s too steep let&#39;s do 19.99 the currency is going to be passed in uh as an argument so i&#39;m going to actually put that here um payment or create payment intent request is called wreck and then we&#39;ll just say like uh wrecked currency we&#39;ll accept that from the front end uh and then here for the payment method types the list of payment method types we&#39;re going to accept that also as an argument so rec dot um payment method type and the reason is that we want this server to support several different payment method types so that&#39;s like card ideal shiropay klarna um alipay those those types of payment methods all right so then we&#39;re call we&#39;re creating a new payment intent service and we are going to call service.create uh i&#39;m trying to recall how this works um okay because i think we want to use this.client ah yes okay so when we initialize okay when we initialize the controller the controller is set up with an instance of a stripe client given our secret key and so when that means that we have we are setting the secret key per request we&#39;re setting our api key per request this is nice we are not globally setting the api key we&#39;re setting it per request but that means that for our payment intent service we have to pass in this doc client as the first argument so that it uses that per requesting now once we&#39;ve created the payment intent we&#39;re going to get back a payment intent object and we want that because our response create payment intent response is going to send back the client secret for that payment intent so i&#39;m going to set client secret equal to payment intent dot client secret and that&#39;ll be what we&#39;re returning now i haven&#39;t actually defined this create payment intent request object that we&#39;re going to use model binding when we&#39;re taking it in from the body and i also have not created the create payment intents create payment intent response either um so i&#39;m going to add those now so in our models directory i&#39;m going to add create payment intent request dot cs and create payment intent response dot cs public class create payment intent response and that is just going to have our client secret so public string client secret and the want that to look like um we want it to look like client secret camel case like so and then i&#39;m gonna say using new newton soft dot json um okay and then something very similar for our request where we are going to accept as a string the payment method type case like that payment method type we&#39;re also going to accept the currency that we&#39;re going to process payment in now every payment method type has limitations some of them you must use a certain currency so we&#39;re gonna have to have some sort of validation uh when that happens but i think this might be at a place where we can sort of test it out we do need to wrap this in some error handling but let&#39;s see what i messed up we can go from there so almost certainly not going to start immediately and perfectly so payment intent response payment oh yeah so this is going to be like create payment intent response let&#39;s see um oh right and then we wanted to use async so we can say create async and then we can say await here and that actually makes use of the async await in c sharp all right so we&#39;ve got a server it&#39;s running let&#39;s uh let&#39;s rerun our tests here we had two failures last time maybe we&#39;ll have one fewer or maybe not okay still two two errors failed to parse a failed response so i&#39;m doing something wrong let&#39;s take a look again at this other sample here and do i need to do from model from body or something yeah okay i was missing this like directive from body uh okay so in our create payment intent method here before i set the class the model class and i&#39;m going to use model binding when the request comes in i have to say from body i believe as this i think this is called a decorator or an attribute or something in c sharp i can&#39;t remember but you have to add that so that it binds the incoming attributes to that all right let&#39;s run this again and still two failures fail to parse 405 method not allowed oh did i call this i called it get it should be post okay so the this is where you define the http methods so get post put delete uh patch options etc etc that your endpoints will accept so in this case we want to accept post requests to slash create payment intent in order to create payment intent objects but i had i had http get which doesn&#39;t that&#39;s that&#39;s not how it works so rerun our specs hey three passing fantastic all right full integration path fails gracefully if uh mismatched currency and payment method type okay so what we need to do now is um when we&#39;re making this api call to create the payment intent uh we need to wrap this up in a try catch block um so i&#39;m going to move all of this into here and i think the error handling for net should show us okay so stripe exception so if we get a stripe exception then i want to return a 400 if we get a any other exception i want to return a 500. so i&#39;m just going to re-raise that and then otherwise here well actually no let&#39;s let&#39;s not re-raise because i do want to respond even if there&#39;s a failure i would like to respond with well-formed json so that the client can parse that and present the error to the developer who&#39;s working with the sample so let&#39;s let&#39;s respond with some error messages here payments controller okay so trying to find some examples um yeah so we want to return bad response with json though okay okay perfect so yes this is what we want to do um uh so e dot i think how do we get the message out of the error object uh e dot stripe error.message if it was a stripe error and then otherwise we&#39;ll just say the message is like a nun failure or something um all right let&#39;s see if that runs um so i wonder if this can be i action result so the return type is not the bad request return type is not um something that we can con that we can cast into uh so how does this work again net core i action result json um i action result i kind of want to return a task of i action result i thought but i i expect that it needs to be sort of uh wrapped um okay i&#39;m gonna pause and i will be back after i figure out what&#39;s going on all right so um previously our task was uh i&#39;m sorry our endpoint here create payment intent was returning an async task where the type in here was create payment intent response but sometimes we want to return a create payment intent response and sometimes we want to just return an error with bad request so bad request gives us the status code 400 and it also allows us to return some just like inline json here and so in order to do that we need to actually return instead of returning a create payment intent response we need to return an i action result um and then instead of returning just returning this object directly here what we want to do is return an ok so a 200 status code with that object nested okay google stop so if we rerun the program or program.cs and then run our tests we are now passing so just to show you what this looks like localhost 4242 if we want if we came over here we could click on card and we could test out you know an sca regulatory card where we click pay the client secret was returned back to the client and then we uh we received this modal this is a test payment for 9.99 usd using 3d secure complete the authentication and then payment is has succeeded what&#39;s cool is that what we&#39;re working through is adding the support for this to several different payment method types so beck&#39;s direct debit uh sepa direct debit let&#39;s take a look at maybe like shiro pay right so you can click on pay and then we experience the bank redirect flavor of payment method where we then have to authorize and we&#39;re redirected back so now net server is implemented in the same way that all of our other servers are and we have an example uh hopefully that was helpful and uh yeah if you enjoyed this then uh hit uh hit the like hit subscribe um and uh yeah i expect to be putting out a lot more content like this so we&#39;ll see you later

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