Update exp to sql

Src/Asp.Net/SqlServerTest/UnitTest/Updateable.cs

@@ -54,8 +54,37 @@ namespace OrmTest
             UValidate.Check(sql.Key, @"UPDATE [Diary]  SET
             [TypeID] = @Const0   WHERE ( [ID] = @ID1 )", "Updateable");
 
+
+            sql = Db.Updateable<UnitDiary>().SetColumns(it => new UnitDiary()
+            {
+                TypeID = saveDiary.TypeID,
+            }).Where(it => it.ID == saveDiary.ID).ToSql();
+            UValidate.Check(sql.Key, @"UPDATE [Diary]  SET
+            [TypeID] = @Const0   WHERE ( [ID] = @ID1 )", "Updateable");
+
+            sql=Db.Updateable<NullTest>().SetColumns(it => new NullTest()
+            {
+                p = true
+
+            }).Where(it => it.id == 1).ToSql();
+            UValidate.Check(sql.Key, @"UPDATE [NullTest]  SET
+            [p] =  @Const0    WHERE ( [id] = @id1 )", "Updateable");
+            sql = Db.Updateable<NullTest>().SetColumns(it => new NullTest()
+            {
+                p2 = true
+
+            }).Where(it => it.id == 1).ToSql();
+            UValidate.Check(sql.Key, @"UPDATE [NullTest]  SET
+            [p2] = @Const0   WHERE ( [id] = @id1 )", "Updateable");
         }
     }
+    public class NullTest
+    {
+        public int id { get; set; }
+        public bool? p { get; set; }
+        public bool p2 { get; set; }
+
+    }
     public class UnitSaveDiary
     {
         public int ID { get; set; }

Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MemberInitExpressionResolve.cs

@@ -109,6 +109,7 @@ namespace SqlSugar
                 }
                 else if (IsConst(item)&&IsConvert(item)&&UtilMethods.IsNullable(item.Type) && UtilMethods.GetUnderType(item.Type)==UtilConstants.BoolType)
                 {
+                    item = (item as UnaryExpression).Operand;
                     parameter.Context.Result.Append(base.Context.GetEqString(memberName, GetNewExpressionValue(item)));
                 }
                 else if (IsConst(item))