Support serialize dateTime format

Src/Asp.Net/SqlSugar/Entities/Mapping/SugarMappingAttribute.cs

@@ -134,6 +134,13 @@ namespace SqlSugar
             get { return _NoSerialize; }
             set { _NoSerialize = value; }
         }
+
+        private string _SerializeDateTimeFormat;
+        public string SerializeDateTimeFormat
+        {
+            get { return _SerializeDateTimeFormat; }
+            set { _SerializeDateTimeFormat = value; }
+        }
     }
 
 }

Src/Asp.Net/SqlSugar/Enum/SugarDateTimeFormat.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace SqlSugar
+{
+    public partial class SugarDateTimeFormat
+    {
+        public const string Default = "yyyy-MM-dd HH:mm:ss";
+        public const string Date = "yyyy-MM-dd HH";
+    }
+}

Src/Asp.Net/SqlSugar/IntegrationServices/SerializeService.cs

@@ -1,4 +1,5 @@
 using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
 using Newtonsoft.Json.Serialization;
 using System;
 using System.Collections.Generic;
@@ -44,8 +45,26 @@ namespace SqlSugar
                             Writable = true,
                             ValueProvider = base.CreateMemberValueProvider(p)
                         }).ToList();
-
+            foreach (var item in list)
+            {
+                if (UtilMethods.GetUnderType(item.PropertyType) == UtilConstants.DateType)
+                {
+                    CreateDateProperty(type, item);
+                }
+            }
             return list;
         }
+
+        private static void CreateDateProperty(Type type, JsonProperty item)
+        {
+            var property = type.GetProperties().Where(it => it.Name == item.PropertyName).First();
+            var itemType = UtilMethods.GetUnderType(property);
+            if (property.GetCustomAttributes(true).Any(it => it is SugarColumn))
+            {
+                var sugarAttribute = (SugarColumn)property.GetCustomAttributes(true).First(it => it is SugarColumn);
+                item.Converter = new IsoDateTimeConverter() { DateTimeFormat = sugarAttribute.SerializeDateTimeFormat };
+            }
+        }
     }
+     
 }

Src/Asp.Net/SqlSugar/SqlSugar.csproj

@@ -87,6 +87,7 @@
     <Compile Include="Entities\SugarDebugger.cs" />
     <Compile Include="Enum\ConditionalType.cs" />
     <Compile Include="Enum\DbType.cs" />
+    <Compile Include="Enum\SugarDateTimeFormat.cs" />
     <Compile Include="Enum\WhereType.cs" />
     <Compile Include="ExpressionsToSql\CaseWhen\CaseWhen.cs" />
     <Compile Include="ExpressionsToSql\CaseWhen\CaseWhenResolve.cs" />