: Check the RealtimeCurrencyConverterUsingYahooAPI repository for an ASP.NET implementation.
A modern currency converter doesn't just use hardcoded rates; it fetches live data from external providers. This application will: Allow users to enter a source amount. Provide dropdowns for "From" and "To" currency selection.
using Microsoft.AspNetCore.Mvc; using Newtonsoft.Json.Linq; public class ConverterController : Controller { private readonly string _apiKey = "YOUR_API_KEY"; [HttpGet] public IActionResult Index() => View(); [HttpPost] public async Task Index(ConversionModel model) { string url = $"https://currencyapi.com{_apiKey}&base_currency={model.FromCurrency}"; using (var client = new HttpClient()) { var response = await client.GetStringAsync(url); var data = JObject.Parse(response); decimal rate = (decimal)data["data"][model.ToCurrency]["value"]; model.Result = model.Amount * rate; } return View(model); } } Use code with caution. Step 4: Building the User Interface currency converter in asp.net c# source code download
Amount: From: USD - US Dollar EUR - Euro GBP - British Pound To: INR - Indian Rupee JPY - Japanese Yen Convert @if (Model != null && Model.Result > 0) { } Use code with caution. Source Code Download Resources
For complete, pre-configured project files, you can find repositories on platforms like or community blogs: Provide dropdowns for "From" and "To" currency selection
Fetch real-time exchange rates via an API like Fixer or CurrencyAPI . Display the converted value instantly. Prerequisites (Community Edition works fine). .NET Core or .NET 8 (for modern MVC architecture). A free API key from a provider like CurrencyAPI. Step 1: Create the Project Open Visual Studio and select Create a new project . Choose ASP.NET Core Web App (Model-View-Controller) . Name the project CurrencyConverterApp . Step 2: Designing the Model
: Separates logic from the UI, making it professional and maintainable. add ConversionModel.cs :
Create a simple model to handle the conversion data. In the Models folder, add ConversionModel.cs :