Add Queryable. Select(exp,true)

Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableHelper.cs

@@ -9,6 +9,7 @@ using System.Text.RegularExpressions;
 using System.Reflection;
 using System.Dynamic;
 using System.Threading.Tasks;
+using System.Collections.ObjectModel;
 
 namespace SqlSugar
 {
@@ -877,6 +878,21 @@ namespace SqlSugar
         #endregion
 
         #region  Other
+        protected string AppendSelect<EntityType>(string sql, ReadOnlyCollection<ParameterExpression> parameters, List<EntityColumnInfo> columnsResult, int parameterIndex1)
+        {
+            var columns = this.Context.EntityMaintenance.GetEntityInfo<EntityType>().Columns;
+            var parameterName = parameters[parameterIndex1];
+            foreach (var item in columns)
+            {
+                if (item.IsIgnore == false && columnsResult.Any(it => it.PropertyName == item.PropertyName) && !sql.Contains(SqlBuilder.GetTranslationColumnName(item.PropertyName)))
+                {
+                    sql = $" {sql},{parameterName.Name}.{item.DbColumnName} AS {item.PropertyName} ";
+                }
+            }
+
+            return sql;
+        }
+
         protected JoinQueryInfo GetJoinInfo(Expression joinExpression, JoinType joinType)
         {
             QueryBuilder.CheckExpressionNew(joinExpression, "Join");

Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider02-05.cs

@@ -9,6 +9,7 @@ using System.Text.RegularExpressions;
 using System.Reflection;
 using System.Dynamic;
 using System.Threading.Tasks;
+using System.Collections.ObjectModel;
 
 namespace SqlSugar 
 {
@@ -192,7 +193,19 @@ namespace SqlSugar
         {
             return _Select<TResult>(expression);
         }
-
+        public ISugarQueryable<TResult> Select<TResult>(Expression<Func<T,T2, TResult>> expression, bool isAutoFill)
+        {
+            var sql = this.Clone().Select(expression).QueryBuilder.GetSelectValue;
+            if (this.QueryBuilder.IsSingle() || string.IsNullOrEmpty(sql) || sql.Trim() == "*")
+            {
+                return this.Select<TResult>(expression);
+            }
+            var parameters = (expression as LambdaExpression).Parameters;
+            var columnsResult = this.Context.EntityMaintenance.GetEntityInfo<TResult>().Columns;
+            sql = AppendSelect<T>(sql, parameters, columnsResult, 0);
+            sql = AppendSelect<T2>(sql, parameters, columnsResult, 1);
+            return this.Select<TResult>(sql);
+        }
         #endregion
 
         #region Order

Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs

@@ -254,6 +254,7 @@ namespace SqlSugar
 
         #region Select
         ISugarQueryable<TResult> Select<TResult>(Expression<Func<T, T2, TResult>> expression);
+        ISugarQueryable<TResult> Select<TResult>(Expression<Func<T,T2, TResult>> expression, bool isAutoFill);
         #endregion
 
         #region OrderBy