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OrmTest/UnitTest/Query/JoinQuery.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using SqlSugar;
+using System.Linq.Expressions;
+using OrmTest.Models;
+namespace OrmTest.UnitTest
+{
+    public class JoinQuery : ExpTestBase
+    {
+        private JoinQuery() { }
+        public JoinQuery(int eachCount)
+        {
+            this.Count = eachCount;
+        }
+        internal void Init()
+        {
+            base.Begin();
+            for (int i = 0; i < base.Count; i++)
+            {
+                Q1();
+                Q2();
+            }
+            base.End("Method Test");
+        }
+
+        public void Q1()
+        {
+            using (var db = GetInstance())
+            {
+                var list = db.Queryable<Student, School>((st, sc) => new object[] {
+                          JoinType.Left,st.SchoolId==sc.Id
+                }).Where(st => st.Id > 0).Select<Student>("*").ToList();
+            }
+        }
+        public void Q2()
+        {
+            using (var db = GetInstance())
+            {
+                var list = db.Queryable<Student, School>((st, sc) => new object[] {
+                          JoinType.Left,st.SchoolId==sc.Id
+                }).Where(st=>st.Id>0).Select<Student>("*").ToList();
+            }
+        }
+
+
+        public SqlSugarClient GetInstance()
+        {
+            SqlSugarClient db = new SqlSugarClient(new SystemTablesConfig() { ConnectionString = Config.ConnectionString, DbType = DbType.SqlServer });
+            db.Database.IsEnableLogEvent = true;
+            db.Database.LogEventStarting = (sql, pars) =>
+            {
+                Console.WriteLine(sql+" "+pars);
+            };
+            return db;
+        }
+    }
+}