From db1cf5c2ce2a8c88e3fa1d8b16f8d173794f7792 Mon Sep 17 00:00:00 2001
From: "nicolas.dorier" <nicolas.dorier@gmail.com>
Date: Thu, 19 Oct 2017 16:01:45 +0900
Subject: [PATCH] format currency correctly

---
 .../Controllers/InvoiceController.UI.cs       | 23 ++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/BTCPayServer/Controllers/InvoiceController.UI.cs b/BTCPayServer/Controllers/InvoiceController.UI.cs
index 832b09ac5..8d6ab411b 100644
--- a/BTCPayServer/Controllers/InvoiceController.UI.cs
+++ b/BTCPayServer/Controllers/InvoiceController.UI.cs
@@ -92,6 +92,27 @@ namespace BTCPayServer.Controllers
 			return View(model);
 		}
 
+
+		static Dictionary<string, CultureInfo> _CurrencyProviders = new Dictionary<string, CultureInfo>();
+		private IFormatProvider GetCurrencyProvider(string currency)
+		{
+			lock(_CurrencyProviders)
+			{
+				if(_CurrencyProviders.Count == 0)
+				{
+					foreach(var culture in CultureInfo.GetCultures(CultureTypes.AllCultures).Where(c => !c.IsNeutralCulture))
+					{
+						try
+						{
+							_CurrencyProviders.TryAdd(new RegionInfo(culture.LCID).ISOCurrencySymbol, culture);
+						}
+						catch { }
+					}
+				}
+				return _CurrencyProviders.TryGet(currency);
+			}
+		}
+
 		[HttpGet]
 		[Route("i/{invoiceId}")]
 		[Route("invoice")]
@@ -123,7 +144,7 @@ namespace BTCPayServer.Controllers
 				ExpirationSeconds = Math.Max(0, (int)(invoice.ExpirationTime - DateTimeOffset.UtcNow).TotalSeconds),
 				MaxTimeSeconds = (int)(invoice.ExpirationTime - invoice.InvoiceTime).TotalSeconds,
 				ItemDesc = invoice.ProductInformation.ItemDesc,
-				Rate = invoice.Rate.ToString(),
+				Rate = invoice.Rate.ToString("C", GetCurrencyProvider(invoice.ProductInformation.Currency)),
 				RedirectUrl = invoice.RedirectURL,
 				StoreName = store.StoreName,
 				TxFees = invoice.TxFee.ToString(),