Handle nullable type.

framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/AbpDbContext.cs

@@ -23,6 +23,7 @@ using Volo.Abp.EntityFrameworkCore.EntityHistory;
 using Volo.Abp.EntityFrameworkCore.Modeling;
 using Volo.Abp.EntityFrameworkCore.ValueConverters;
 using Volo.Abp.Guids;
+using Volo.Abp.Localization;
 using Volo.Abp.MultiTenancy;
 using Volo.Abp.ObjectExtending;
 using Volo.Abp.Reflection;
@@ -340,13 +341,19 @@ namespace Volo.Abp.EntityFrameworkCore
                 {
                     if (TypeHelper.IsPrimitiveExtended(entryProperty.Metadata.ClrType, includeEnums: true))
                     {
-                        if (entryProperty.Metadata.ClrType == typeof(Guid))
+                        var conversionType = entryProperty.Metadata.ClrType;
+                        if (TypeHelper.IsNullable(conversionType))
                         {
-                            entryProperty.CurrentValue = TypeDescriptor.GetConverter(entryProperty.Metadata.ClrType).ConvertFromInvariantString(entityProperty.ToString());
+                            conversionType = conversionType.GetFirstGenericArgumentIfNullable();
+                        }
+
+                        if (conversionType == typeof(Guid))
+                        {
+                            entryProperty.CurrentValue = TypeDescriptor.GetConverter(conversionType).ConvertFromInvariantString(entityProperty.ToString());
                         }
                         else
                         {
-                            entryProperty.CurrentValue = Convert.ChangeType(entityProperty, entryProperty.Metadata.ClrType, CultureInfo.InvariantCulture);
+                            entryProperty.CurrentValue = Convert.ChangeType(entityProperty, conversionType, CultureInfo.InvariantCulture);
                         }
                     }
                 }

framework/src/Volo.Abp.ObjectExtending/Volo/Abp/Data/HasExtraPropertiesExtensions.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.ComponentModel;
 using System.Globalization;
 using Volo.Abp.DynamicProxy;
+using Volo.Abp.Localization;
 using Volo.Abp.ObjectExtending;
 using Volo.Abp.Reflection;
 
@@ -33,12 +34,18 @@ namespace Volo.Abp.Data
 
             if (TypeHelper.IsPrimitiveExtended(typeof(TProperty), includeEnums: true))
             {
-                if (typeof(TProperty) == typeof(Guid))
+                var conversionType = typeof(TProperty);
+                if (TypeHelper.IsNullable(conversionType))
                 {
-                    return (TProperty)TypeDescriptor.GetConverter(typeof(TProperty)).ConvertFromInvariantString(value.ToString());
+                    conversionType = conversionType.GetFirstGenericArgumentIfNullable();
                 }
 
-                return (TProperty)Convert.ChangeType(value, typeof(TProperty), CultureInfo.InvariantCulture);
+                if (conversionType == typeof(Guid))
+                {
+                    return (TProperty)TypeDescriptor.GetConverter(conversionType).ConvertFromInvariantString(value.ToString());
+                }
+
+                return (TProperty)Convert.ChangeType(value, conversionType, CultureInfo.InvariantCulture);
             }
 
             throw new AbpException("GetProperty<TProperty> does not support non-primitive types. Use non-generic GetProperty method and handle type casting manually.");

framework/test/Volo.Abp.EntityFrameworkCore.Tests/Volo/Abp/EntityFrameworkCore/Domain/ExtraProperties_Tests.cs

@@ -29,6 +29,7 @@ namespace Volo.Abp.EntityFrameworkCore.Domain
             london.ExtraProperties["PhoneCode"] = 123456;
             london.ExtraProperties["Rank"] = "88";
             london.ExtraProperties["ZipCode"] = null;
+            london.ExtraProperties["Established"] = DateTime.MinValue;
             london.ExtraProperties["Guid"] = "a7ae2efe-d8d6-466b-92e3-da14aa6e1c5b";
             await CityRepository.UpdateAsync(london);
 
@@ -36,10 +37,10 @@ namespace Volo.Abp.EntityFrameworkCore.Domain
             london2.GetProperty<string>("PhoneCode").ShouldBe("123456");
             london2.GetProperty<int>("Rank").ShouldBe(88);
             london2.GetProperty<string>("ZipCode").ShouldBe(null);
+            london2.GetProperty<DateTime?>("Established").ShouldBe(DateTime.MinValue);
             london2.GetProperty<Guid>("Guid").ShouldBe(new Guid("a7ae2efe-d8d6-466b-92e3-da14aa6e1c5b"));
         }
 
-
         [Fact]
         public async Task An_Extra_Property_Configured_As_Extension2()
         {

framework/test/Volo.Abp.EntityFrameworkCore.Tests/Volo/Abp/EntityFrameworkCore/Domain/TestEntityExtensionConfigurator.cs

@@ -25,6 +25,8 @@ namespace Volo.Abp.EntityFrameworkCore.Domain
                         "ZipCode"
                     ).MapEfCoreProperty<City, int>(
                         "Rank"
+                    ).MapEfCoreProperty<City, DateTime?>(
+                        "Established"
                     ).MapEfCoreProperty<City, Guid>(
                         "Guid"
                     );

framework/test/Volo.Abp.TestApp/Volo/Abp/TestApp/Testing/HasExtraPropertiesExtensions_Tests.cs

@@ -33,8 +33,17 @@ namespace Volo.Abp.TestApp.Testing
             city.GetProperty<bool>("IsHot").ShouldBeFalse();
             city.GetProperty<bool>("IsHot", true).ShouldBeTrue();
 
+            city.GetProperty<bool?>("IsHot?").ShouldBeNull();
+            city.GetProperty<bool?>("IsHot?", true).Value.ShouldBeTrue();
+
             city.SetProperty("Guid", "2260AFEC-BBFD-42D4-A91A-DCB11E09B17F");
             city.GetProperty<Guid>("Guid").ShouldBe(new Guid("2260AFEC-BBFD-42D4-A91A-DCB11E09B17F"));
+
+            city.SetProperty("Guid?", "2260AFEC-BBFD-42D4-A91A-DCB11E09B17F");
+            city.GetProperty<Guid?>("Guid?").ShouldBe(new Guid("2260AFEC-BBFD-42D4-A91A-DCB11E09B17F"));
+
+            city.SetProperty("DateTime?", DateTime.MinValue);
+            city.GetProperty<DateTime?>("DateTime?").ShouldBe(DateTime.MinValue);
         }
     }
 }