Fix #5054: resolve the issue in fa-IR language.

Oqtane.Server/Extensions/ApplicationBuilderExtensions.cs

@@ -34,6 +34,15 @@ namespace Oqtane.Extensions
                 options.SetDefaultCulture(defaultCulture)
                     .AddSupportedCultures(supportedCultures)
                     .AddSupportedUICultures(supportedCultures);
+
+                for  (var i = 0; i < options.SupportedCultures.Count; i++)
+                {
+                    if (options.SupportedCultures[i].Name.Equals("fa-IR", StringComparison.OrdinalIgnoreCase))
+                    {
+                        options.SupportedCultures[i] = PersianCulture.GetPersianCultureInfo();
+                        break;
+                    }
+                }
             });
 
             return app;

Oqtane.Server/Infrastructure/Localization/PersianCalendar.cs

@@ -0,0 +1,77 @@
+using System;
+
+namespace Oqtane.Infrastructure
+{
+    public class PersianCalendar : System.Globalization.PersianCalendar
+    {
+        public override int GetYear(DateTime time)
+        {
+            try
+            {
+                return base.GetYear(time);
+            }
+            catch
+            {
+                // ignore
+            }
+
+            return time.Year;
+        }
+
+        public override int GetMonth(DateTime time)
+        {
+            try
+            {
+                return base.GetMonth(time);
+            }
+            catch
+            {
+                // ignore
+            }
+
+            return time.Month;
+        }
+
+        public override int GetDayOfMonth(DateTime time)
+        {
+            try
+            {
+                return base.GetDayOfMonth(time);
+            }
+            catch
+            {
+                // ignore
+            }
+
+            return time.Day;
+        }
+
+        public override int GetDayOfYear(DateTime time)
+        {
+            try
+            {
+                return base.GetDayOfYear(time);
+            }
+            catch
+            {
+                // ignore
+            }
+
+            return time.DayOfYear;
+        }
+
+        public override DayOfWeek GetDayOfWeek(DateTime time)
+        {
+            try
+            {
+                return base.GetDayOfWeek(time);
+            }
+            catch
+            {
+                // ignore
+            }
+
+            return time.DayOfWeek;
+        }
+    }
+}

Oqtane.Server/Infrastructure/Localization/PersianCulture.cs

@@ -0,0 +1,70 @@
+using System;
+using System.Globalization;
+using System.Reflection;
+
+namespace Oqtane.Infrastructure
+{
+    public class PersianCulture
+    {
+        public static CultureInfo GetPersianCultureInfo()
+        {
+            var persianCultureInfo = new CultureInfo("fa-IR");
+
+            SetPersianDateTimeFormatInfo(persianCultureInfo.DateTimeFormat);
+            SetNumberFormatInfo(persianCultureInfo.NumberFormat);
+
+            var cal = new PersianCalendar();
+
+            FieldInfo fieldInfo = persianCultureInfo.GetType().GetField("_calendar", BindingFlags.NonPublic | BindingFlags.Instance);
+            if (fieldInfo != null)
+            {
+                fieldInfo.SetValue(persianCultureInfo, cal);
+            }
+
+            FieldInfo info = persianCultureInfo.DateTimeFormat.GetType().GetField("calendar", BindingFlags.NonPublic | BindingFlags.Instance);
+            if (info != null)
+            {
+                info.SetValue(persianCultureInfo.DateTimeFormat, cal);
+            }
+
+            return persianCultureInfo;
+        }
+
+        public static void SetPersianDateTimeFormatInfo(DateTimeFormatInfo persianDateTimeFormatInfo)
+        {
+            persianDateTimeFormatInfo.MonthNames = new[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", string.Empty };
+            persianDateTimeFormatInfo.MonthGenitiveNames = persianDateTimeFormatInfo.MonthNames;
+            persianDateTimeFormatInfo.AbbreviatedMonthNames = persianDateTimeFormatInfo.MonthNames;
+            persianDateTimeFormatInfo.AbbreviatedMonthGenitiveNames = persianDateTimeFormatInfo.MonthNames;
+
+            persianDateTimeFormatInfo.DayNames = new[] { "یکشنبه", "دوشنبه", "ﺳﻪشنبه", "چهارشنبه", "پنجشنبه", "جمعه", "شنبه" };
+            persianDateTimeFormatInfo.AbbreviatedDayNames = new[] { "ی", "د", "س", "چ", "پ", "ج", "ش" };
+            persianDateTimeFormatInfo.ShortestDayNames = persianDateTimeFormatInfo.AbbreviatedDayNames;
+            persianDateTimeFormatInfo.FirstDayOfWeek = DayOfWeek.Saturday;
+
+            persianDateTimeFormatInfo.AMDesignator = "ق.ظ";
+            persianDateTimeFormatInfo.PMDesignator = "ب.ظ";
+
+            persianDateTimeFormatInfo.DateSeparator = "/";
+            persianDateTimeFormatInfo.TimeSeparator = ":";
+
+            persianDateTimeFormatInfo.FullDateTimePattern = "tt hh:mm:ss yyyy mmmm dd dddd";
+            persianDateTimeFormatInfo.YearMonthPattern = "yyyy, MMMM";
+            persianDateTimeFormatInfo.MonthDayPattern = "dd MMMM";
+
+            persianDateTimeFormatInfo.LongDatePattern = "dddd, dd MMMM,yyyy";
+            persianDateTimeFormatInfo.ShortDatePattern = "yyyy/MM/dd";
+
+            persianDateTimeFormatInfo.LongTimePattern = "hh:mm:ss tt";
+            persianDateTimeFormatInfo.ShortTimePattern = "hh:mm tt";
+        }
+
+        public static void SetNumberFormatInfo(NumberFormatInfo persianNumberFormatInfo)
+        {
+            persianNumberFormatInfo.NumberDecimalSeparator = "/";
+            persianNumberFormatInfo.DigitSubstitution = DigitShapes.NativeNational;
+            persianNumberFormatInfo.NumberNegativePattern = 0;
+            persianNumberFormatInfo.NegativeSign = "-";
+        }
+    }
+}