Update exp to sql

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

@@ -775,6 +775,10 @@ namespace SqlSugar
                 {
                     type = DbType.MySql;
                 }
+                else 
+                {
+                    type = GetType(this.Context.GetType().Name);
+                }
                 return this.Context.SqlFuncServices.First(it => it.UniqueMethodName == name).MethodValue(model, type, this.Context);
             }
             else
@@ -1021,6 +1025,20 @@ namespace SqlSugar
             return null;
         }
 
+        private DbType GetType(string name)
+        {
+            DbType result = DbType.SqlServer;
+            foreach (var item in UtilMethods.EnumToDictionary<DbType>())
+            {
+                if (name.StartsWith(item.Value.ToString())) 
+                {
+                    result = item.Value;
+                    break;
+                }
+            }
+            return result;
+        }
+
         private bool IsContainsArray(MethodCallExpression express, string methodName, bool isValidNativeMethod)
         {
             return !isValidNativeMethod && express.Method.DeclaringType.Namespace.IsIn("System.Linq", "System.Collections.Generic") && methodName == "Contains";