how to pay with visa, debit or credit card in c# asp net

helloo mahesh van thanks for your respond...

i have actualy codes for credit card payment and i havent any company.... in the program, it needs three strings like secret, data and merchant key and i do not know how should i bring these info. do you know, what they are? are they info to my account? i dont know, people pay to who? i need those information... i add the codes as follow and i hope you can help me out, if not, then i go through your steps...

private string CreateToken(string message, string secret)
        {
            secret = secret ?? "";
            var encoding = new System.Text.ASCIIEncoding();
            byte[] keyByte = encoding.GetBytes(secret);
            byte[] messageByte = encoding.GetBytes(message);
            using (var vmessiah = new HMACSHA256(keyByte))
            {
                byte[] venusmessage = vmessiah.ComputeHash(messageByte);
                return Convert.ToBase64String(venusmessage);
            }
        }

 

protected void btnPayNow_Click(object sender, EventArgs e)
        {
            string secret = "";  //i dont know what is it? how should i find in my account?
            string data = "";  //i dont know what is it? how should i find in my account?
            string merchantkey = "";  //i dont know what is it? how should i find in my account?

            SortedDictionary formParams = new SortedDictionary();
            formParams.Add("AppId", merchantkey);
            formParams.Add("Email", txtEmail.Text);
            formParams.Add("The Name on the Card", txtName.Text);
            formParams.Add("expiration Date", txtexpiration.Text);
            formParams.Add("CCV", txtccv.Text);
            formParams.Add("returnUrl", "http://localhost:64353/CallBack.aspx");

            foreach (var kvp in formParams)
                data = data + kvp.Key + kvp.Value;

            string signature = CreateToken(data, secret);
            lblresult.Text = signature;

........

}

i appreciate your respond, kind regards

You can integrate with payment gateway APIs such as Stripe or PayPal to provide credit card and debit card payments. You have to create an account with these payment gateways. If you're building this project for a company, the company has to first sign up with these payment gateways and provide you the key and API access details. We are using Stripe and PayPal on C# Corner. Stripe provides better rates (last we checked).

Here are the steps required to implement a payment gateway (ChatGPT):

1. Choose a Payment Gateway: Select a service like Stripe, PayPal, or another that supports the types of payments you want to accept (Visa, debit, credit cards).
2. Create an Account and Get API Keys: Sign up for an account with the chosen payment gateway and obtain the necessary API keys for integration.
3. Set Up the Payment Gateway SDK: Most payment gateways offer SDKs (Software Development Kits) for different programming languages. For C# ASP.NET, you'll need to add the SDK to your project. This is often done via NuGet package manager.
4. Implement the Payment Gateway API: Integrate the payment gateway into your ASP.NET application. This typically involves creating a payment form, handling payment submissions, and using the gateway's API to process the payment.
5. Secure Your Application: Ensure that your application is secure, as you're dealing with sensitive financial data. This includes using HTTPS, secure handling of API keys, and following the gateway's best practices for security.
6. Handle Responses and Errors: After a payment attempt, the gateway will send a response. You need to handle these responses appropriately in your application, including success messages and error handling.
7. Testing: Before going live, thoroughly test the payment process using the gateway's test mode to simulate transactions without actual money being involved.
8. Compliance with Regulations: Ensure compliance with financial regulations like PCI-DSS when handling credit card information.

Here are couple of blogs/tutorials on this site: 

Implement Stripe Payment Gateway In ASP.NET MVC
https://www.c-sharpcorner.com/Blogs/implement-stripe-payment-gateway-in-asp-net-mvc
 

Credit Card Payment In ASP.NET using Stripe
https://www.c-sharpcorner.com/blogs/credit-card-payment-in-asp-net-using-stripecom1

Cheers!