Optimized code select dto

Src/Asp.Net/SqlServerTest/Demo/Demo1_Queryable.cs

@@ -169,6 +169,7 @@ namespace OrmTest
               .Select(it=>new ViewOrder(){ 
                   Name=SqlFunc.Subqueryable<Order>().Select(s=>s.Name)
                }).ToList();
+            var test19 = db.Queryable<Order>().Select<ViewOrder>().ToList();
             Console.WriteLine("#### Examples End ####");
         }
 

Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs

@@ -790,11 +790,15 @@ namespace SqlSugar
                 var selectValue = new SugarMapper(this.Context).GetSelectValue<TResult>(this.QueryBuilder);
                 return this.Select<TResult>(selectValue);
             }
-            else
+            else if (this.QueryBuilder.EntityType == UtilConstants.ObjType || (this.QueryBuilder.AsTables != null && this.QueryBuilder.AsTables.Count == 1)||this.QueryBuilder.EntityName!=this.QueryBuilder.EntityType.Name) 
             {
-
                 return this.Select<TResult>(this.SqlBuilder.SqlSelectAll);
             }
+            else
+            {
+                var selects = this.QueryBuilder.GetSelectValueByString();
+                return this.Select<TResult>(selects);
+            }
         }
 
         public virtual ISugarQueryable<TResult> Select<TResult>(string selectValue)