Update ContextMethods

Src/Asp.Net/SqlSugar/Infrastructure/ContextMethods.cs

@@ -7,6 +7,7 @@ using System.Dynamic;
 using System.Linq;
 using System.Reflection;
 using System.Text;
+using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 namespace SqlSugar
 {
@@ -276,9 +277,21 @@ namespace SqlSugar
                 var name = item.Name;
                 var typeName = tType.Name;
                 if (item.PropertyType.IsClass())
+                {
+                    if (readerValues != null &&
+                        readerValues.Count == 1 &&
+                        readerValues.First().Key == name &&
+                        readerValues.First().Value!=null&&
+                        readerValues.First().Value.GetType()==UtilConstants.StringType&&
+                        Regex.IsMatch(readerValues.First().Value.ObjToString(), @"^\{.+\}$"))
+                    {
+                        result.Add(name, DeserializeObject<Dictionary<string,object>>(readerValues.First().Value.ObjToString()));
+                    }
+                    else
                     {
                         result.Add(name, DataReaderToDynamicList_Part(readerValues, item, reval));
                     }
+                }
                 else
                 {
                     if (readerValues.Any(it => it.Key.Equals(name, StringComparison.CurrentCultureIgnoreCase)))