asp.netで現地時間でウェルカムメッセージを表示

Question

以下のコードは、現在の現地時間でのメッセージをユーザーに表示しています。これは、私のlocalhostでうまく動作しますが、サーバにアップロードした後、サーバ時間を示します。どのようにISTに変換しますか？

private void admin_Default2_Load(object sender, EventArgs e) 
{ 
    if (DateTime.Now.Hour < 12) { 
     lblGreeting.Text = "Good Morning"; 
     lblDate.Text = Convert.ToString(DateTime.Now); 
    } else if (DateTime.Now.Hour < 17) { 
     lblGreeting.Text = "Good Afternoon"; 
     lblDate.Text = Convert.ToString(DateTime.Now); 
    } else { 
     lblGreeting.Text = "Good Evening"; 
     lblDate.Text = Convert.ToString(DateTime.Now); 
    } 
} 

Answer 1

はちょうどあなたがISTをしたい場合はUTC &へのあなたの現在の時間が5.5時間を追加変換します

if (DateTime.UtcNow.AddHours(5.5).Hour < 12) { 
    lblGreeting.Text = "Good Morning"; 
    lblDate.Text = Convert.ToString(DateTime.UtcNow.AddHours(5.5)); 
} else if (DateTime.UtcNow.AddHours(5.5).Hour < 17) { 
    lblGreeting.Text = "Good Afternoon"; 
    lblDate.Text = Convert.ToString(DateTime.UtcNow.AddHours(5.5)); 
} else { 
    lblGreeting.Text = "Good Evening"; 
    lblDate.Text = Convert.ToString(DateTime.UtcNow.AddHours(5.5)); 
} 

Answer 2

ISTは+5です：世界時先に30時間ので、あなたは以下のコードを使用することができます

 if (DateTime.Now.ToUniversalTime().AddHours(5).AddMinutes(30).Hour < 12) 
     { 
      lblGreeting.Text = "Good Morning"; 
      lblDate.Text = Convert.ToString(DateTime.Now); 
     } 
     else if (DateTime.Now.ToUniversalTime().AddHours(5).AddMinutes(30).Hour < 17) 
     { 
      lblGreeting.Text = "Good Afternoon"; 
      lblDate.Text = Convert.ToString(DateTime.Now); 
     } 
     else 
     { 
      lblGreeting.Text = "Good Evening"; 
      lblDate.Text = Convert.ToString(DateTime.Now); 
     } 

Answer 3

DateTime serverTime = DateTime.Now; // gives you current Time in server timeZone 
DateTime utcTime = serverTime.ToUniversalTime; // convert it to Utc using timezone setting of server computer 
TimeZoneInfo tzi = TimeZoneInfo.FindSystemTimeZoneById("India Standard Time"); 
DateTime localTime = TimeZoneInfo.ConvertTimeFromUtc(utcTime, tzi); // convert from utc to local 
if (localTime < 12) { 
     lblGreeting.Text = "Good Morning"; 
     lblDate.Text = Convert.ToString(localTime); 
    } else if (localTime < 17) { 
     lblGreeting.Text = "Good Afternoon"; 
     lblDate.Text = Convert.ToString(localTime); 
    } else { 
     lblGreeting.Text = "Good Evening"; 
     lblDate.Text = Convert.ToString(localTime); 
    }