Winfrom 设置PC 端日期格式

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using System; using System.Collections.Generic; using System.Linq; using System.Runtime.InteropServices; using System.Text;   namespace ZB.QueueSys.Common {     public class DateHelper     {         private static DateHelper instance;         public static DateHelper Instance         {             get             {                 if (instance == null) instance = new DateHelper();                 return DateHelper.instance;             }         }             [DllImport("kernel32.dll", EntryPoint = "GetSystemDefaultLCID")]         public static extern int GetSystemDefaultLCID();         [DllImport("kernel32.dll", EntryPoint = "SetLocaleInfoA")]         public static extern int SetLocaleInfo(int Locale, int LCType, string lpLCData);         public const int LOCALE_SLONGDATE = 0x20;         public const int LOCALE_SSHORTDATE = 0x1F;         public const int LOCALE_STIME = 0x1003;           public void SetDateTimeFormat()         {             try             {                 int x = GetSystemDefaultLCID();                 SetLocaleInfo(x, LOCALE_STIME, "HH:mm:ss");        //时间格式                 SetLocaleInfo(x, LOCALE_SSHORTDATE, "yyyy-MM-dd");   //短日期格式                  SetLocaleInfo(x, LOCALE_SLONGDATE, "yyyy-MM-dd");   //长日期格式             }             catch { return; }         }       } }