How to customize CultureInfo's default calendar?

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后悔当初
后悔当初 2021-02-09 22:53

I want to customize calendar to persian but after setting CultureInfo as this:

CultureInfo fa = new CultureInfo(\"fa-IR\",true);
Thread.CurrentThread.CurrentCult         


        
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3条回答
  • 2021-02-09 22:56

    You can create a subclass of CultureInfo. The property of it will not be read-only and you can assign to it..

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  • 2021-02-09 22:57

    overriding for beginners like me:

    public class PersianCulture : CultureInfo
    {
    
        private readonly System.Globalization.Calendar cal;
    
        private readonly System.Globalization.Calendar[] optionals;
    
        public PersianCulture()
    
            : this("fa-IR", true)
        {
    
        }
        public PersianCulture(string cultureName, bool useUserOverride)
    
            : base(cultureName, useUserOverride)
        {
            cal = base.OptionalCalendars[0];
            var optionalCalendars = new List<System.Globalization.Calendar>();
            optionalCalendars.AddRange(base.OptionalCalendars);
            optionalCalendars.Insert(0, new PersianCalendar());
            Type formatType = typeof(DateTimeFormatInfo);
            Type calendarType = typeof(System.Globalization.Calendar);
            PropertyInfo idProperty = calendarType.GetProperty("ID", BindingFlags.Instance | BindingFlags.NonPublic);
            FieldInfo optionalCalendarfield = formatType.GetField("optionalCalendars",BindingFlags.Instance | BindingFlags.NonPublic);
            var newOptionalCalendarIDs = new Int32[optionalCalendars.Count];
    
            for (int i = 0; i < newOptionalCalendarIDs.Length; i++)
    
                newOptionalCalendarIDs[i] = (Int32)idProperty.GetValue(optionalCalendars[i], null);
            optionalCalendarfield.SetValue(DateTimeFormat, newOptionalCalendarIDs);
    
            optionals = optionalCalendars.ToArray();
    
            cal = optionals[0];
    
            DateTimeFormat.Calendar = optionals[0];
            DateTimeFormat.MonthNames = new[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };
    
            DateTimeFormat.MonthGenitiveNames = new[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };
    
            DateTimeFormat.AbbreviatedMonthNames = new[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };
    
            DateTimeFormat.AbbreviatedMonthGenitiveNames = new[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };
    
            DateTimeFormat.AbbreviatedDayNames = new string[] { "ی", "د", "س", "چ", "پ", "ج", "ش" };
    
            DateTimeFormat.ShortestDayNames = new string[] { "ی", "د", "س", "چ", "پ", "ج", "ش" };
    
            DateTimeFormat.DayNames = new string[] { "یکشنبه", "دوشنبه", "ﺳﻪشنبه", "چهارشنبه", "پنجشنبه", "جمعه", "شنبه" };
            DateTimeFormat.AMDesignator = "ق.ظ";
            DateTimeFormat.PMDesignator = "ب.ظ";
    
        }
        public override System.Globalization.Calendar Calendar
        {
    
            get { return cal; }
    
        }
        public override System.Globalization.Calendar[] OptionalCalendars
        {
    
            get { return optionals; }
    
        }
    }
    

    then in Page_Load:

    PersianCulture fa = new PersianCulture();
    
    Thread.CurrentThread.CurrentCulture = fa;
    

    form here

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  • 2021-02-09 22:58

    You can set CultureInfo of thread before the control is rendered and restore once the control is rendered.

    Output :

    enter image description here

    Below example show's how you can render two different calendar with different CultureInfo.

    Default.aspx

    <%@Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>
    <%@ Import Namespace="System.Globalization" %>
    <%@ Import Namespace="System.Threading" %>
    
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <title></title>
    </head>
    <body>
        <form id="form1" runat="server">
        <div>
            <% Thread.CurrentThread.CurrentCulture = new CultureInfo("fa-IR");%>
    
            <asp:Calendar ID="Calendar1" runat="server">
            </asp:Calendar>
            <%
                Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US");
            %>
            <asp:Calendar ID="Calendar2" runat="server"></asp:Calendar>
    
        </div>
        </form>
    </body>
    </html>
    

    Default.aspx.cs

    using System;
    using System.Threading;
    using System.Globalization;
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
    
        }
    }
    
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