@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: The GetDateFormat API !!!!C# Signature: [DllImport("kernel32.dll")] static extern int GetDateFormat(uint locale, uint dwFlags, ref SystemTime date, string format, StringBuilder sb, int sbSize); !!!!User-Defined Types: SYSTEMTIME in Win32 is different then DateTime in CLR. This structure may represent SYSTEMTIME in CLR world: [StructLayout(LayoutKind.Sequential)] private struct SystemTime { [MarshalAs(UnmanagedType.U2)] public ushort Year; [MarshalAs(UnmanagedType.U2)] public ushort Month; [MarshalAs(UnmanagedType.U2)] public ushort DayOfWeek; [MarshalAs(UnmanagedType.U2)] public ushort Day; [MarshalAs(UnmanagedType.U2)] public ushort Hour; [MarshalAs(UnmanagedType.U2)] public ushort Minute; [MarshalAs(UnmanagedType.U2)] public ushort Second; [MarshalAs(UnmanagedType.U2)] public ushort Milliseconds; } !!!!Notes: Win32 interprets format differently than CLR does so if you don't need exactly Win32 compatible behavior use DateTime.ToString() instead. !!!!Tips & Tricks: !!!!Sample Code: using System; using System.Text; using System.Globalization; using System.Runtime.InteropServices; class Test { [DllImport("kernel32.dll")] static extern int GetDateFormat(int locale, uint dwFlags, ref SystemTime sysTime, string lpFormat, StringBuilder lpDateStr, int cchDate ); [StructLayout(LayoutKind.Sequential)] private struct SystemTime { [MarshalAs(UnmanagedType.U2)] public ushort Year; [MarshalAs(UnmanagedType.U2)] public ushort Month; [MarshalAs(UnmanagedType.U2)] public ushort DayOfWeek; [MarshalAs(UnmanagedType.U2)] public ushort Day; [MarshalAs(UnmanagedType.U2)] public ushort Hour; [MarshalAs(UnmanagedType.U2)] public ushort Minute; [MarshalAs(UnmanagedType.U2)] public ushort Second; [MarshalAs(UnmanagedType.U2)] public ushort Milliseconds; public SystemTime(DateTime dateTime) { this.Year = (ushort)dateTime.Year; this.Month = (ushort)dateTime.Month; this.DayOfWeek = (ushort)dateTime.DayOfWeek; this.Day = (ushort)dateTime.Day; this.Hour = (ushort)dateTime.Hour; this.Minute = (ushort)dateTime.Minute; this.Second = (ushort)dateTime.Second; this.Milliseconds = (ushort)dateTime.Millisecond; } } static void Main(string[] args) { int locale = CultureInfo.InvariantCulture.LCID; DateTime dt = DateTime.Now; SystemTime st = new SystemTime(dt); string format = "ddd',' MMM dd yy"; StringBuilder sb = new StringBuilder(format.Length + 16); int res = GetDateFormat(locale, 0, ref st, format, sb, sb.Capacity); if (res == 0) { res = GetDateFormat(locale, 0, ref st, format, sb, 0); if (res != 0) { sb = new StringBuilder(res); res = GetDateFormat(locale, 0, ref st, format, sb, sb.Capacity); } } if (res <= 0) { throw new ArgumentException(); } Console.WriteLine(sb); } } !!!!Alternative Managed API: DateTime.ToString(string format, IFormatProvider provider); Documentation: GetDateFormat@msdn on MSDN
Edit kernel32.getdatef...
You do not have permission to change this page. If you feel this is in error, please send feedback with the contact link on the main page.