C# 启动项目直接修改电脑的日期格式

启动界面添加

1、引用添加

using System.Runtime.InteropServices;

2、方法添加

  [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 (Exception ex)
            {
                Console.WriteLine(ex);
            }
        }

    }

3、在启动界面的Load事件调用方法

 SetDateTimeFormat();