MySql Support DateTimeOffset

Src/Asp.Net/MySqlTest/UnitTest/UCodeFirst.cs

@@ -37,6 +37,17 @@ namespace OrmTest
             }).ToList();
             Db.CodeFirst.InitTables<UnitTest012213>();
             Db.CodeFirst.InitTables<UnitTest3131>();
+            Db.CodeFirst.InitTables<UnitDateOfTime2>();
+          
+            Db.Insertable(new UnitDateOfTime2() { DateTimeOffset1 = DateTimeOffset.Now }).ExecuteCommand();
+            var list2 = Db.Queryable<UnitDateOfTime2>().ToList();
+            
+        }
+
+        public class UnitDateOfTime2
+        {
+            [SqlSugar.SugarColumn(ColumnDataType ="datetime(3)")]
+            public DateTimeOffset DateTimeOffset1 { get; set; }
         }
 
         public class UnitTest3131 

Src/Asp.Net/SqlSugar/Realization/MySql/DbBind/MySqlDbBind.cs

@@ -22,6 +22,8 @@ namespace SqlSugar
                 csharpTypeName = "bool";
             if (csharpTypeName == "SByte")
                 csharpTypeName = "Byte";
+            if (csharpTypeName == "DateTimeOffset")
+                csharpTypeName = "DateTime";
             var mappings = this.MappingTypes.Where(it => it.Value.ToString().Equals(csharpTypeName, StringComparison.CurrentCultureIgnoreCase));
             return mappings.HasValue() ? mappings.First().Key : "varchar";
         }

Src/Asp.Net/SqlSugar/Realization/MySql/MySqlProvider.cs

@@ -117,6 +117,11 @@ namespace SqlSugar
                 {
                     sqlParameter.DbType = System.Data.DbType.AnsiString;
                 }
+                if (parameter.DbType== System.Data.DbType.DateTimeOffset) 
+                {
+                    sqlParameter.Value = UtilMethods.ConvertFromDateTimeOffset((DateTimeOffset)sqlParameter.Value);
+                    sqlParameter.DbType = System.Data.DbType.DateTime;
+                }
                 ++index;
             }
             return result;

Src/Asp.Net/SqlSugar/Utilities/UtilMethods.cs

@@ -17,6 +17,16 @@ namespace SqlSugar
     public class UtilMethods
     {
 
+        internal static DateTime ConvertFromDateTimeOffset(DateTimeOffset dateTime)
+        {
+            if (dateTime.Offset.Equals(TimeSpan.Zero))
+                return dateTime.UtcDateTime;
+            else if (dateTime.Offset.Equals(TimeZoneInfo.Local.GetUtcOffset(dateTime.DateTime)))
+                return DateTime.SpecifyKind(dateTime.DateTime, DateTimeKind.Local);
+            else
+                return dateTime.DateTime;
+        }
+
         internal static object To(object value, Type destinationType)
         {
             return To(value, destinationType, CultureInfo.InvariantCulture);