修改DEMO

Src/Asp.Net/SqlServerTest/4_JoinQuery.cs

@@ -61,7 +61,7 @@ namespace OrmTest
         public static List<ViewOrder2> SyntaxSugar3()
         {
             var db = DbHelper.GetNewDb();
-            var list = db.Queryable<Order, OrderItem, Custom>((o, i, c) => o.Id == i.OrderId && c.Id == o.CustomId)
+            var list = db.Queryable<Order, OrderDetail, Custom>((o, i, c) => o.Id == i.OrderId && c.Id == o.CustomId)
                 .Select((o, i, c) => new ViewOrder2 { Id = o.Id, Name = o.Name, CustomName = c.Name })
                 .ToList();
 

Src/Asp.Net/SqlServerTest/5_PageQuery.cs

@@ -0,0 +1,112 @@
+using OrmTest;
+using SqlSugar;
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+
+public class _5_PageQuery
+{
+    public static void Init()
+    {
+    
+        int pagenumber = 1;
+        int pageSize = 20;
+        int totalCount = 0;
+
+        SqlSugarClient db = DbHelper.GetNewDb();
+
+        //建表
+        //Create table
+        AddTestData(db);
+
+        // 同步分页方法
+        // Synchronous pagination method
+        SyncPagination(db, pagenumber, pageSize, ref totalCount);
+
+        // 异步分页方法
+        // Asynchronous pagination method
+        AsyncPagination(db, pagenumber, pageSize) .GetAwaiter() .GetResult();
+    }
+
+    public static void AddTestData(SqlSugarClient db)
+    {
+    
+        //建表
+        //Create table
+        db.CodeFirst.InitTables<School, Student>();
+
+        // 添加学校数据
+        // Add school data
+        var school1 = new School { Name = "School A" };
+        var school2 = new School { Name = "School B" };
+        db.Insertable(school1).ExecuteCommand();
+        db.Insertable(school2).ExecuteCommand();
+
+        // 添加学生数据
+        // Add student data
+        var student1 = new Student { SchoolId = school1.Id, Name = "John", CreateTime = DateTime.Now };
+        var student2 = new Student { SchoolId = school1.Id, Name = "Alice", CreateTime = DateTime.Now }; 
+
+        db.Insertable(student1).ExecuteCommand();
+        db.Insertable(student2).ExecuteCommand();
+
+        Console.WriteLine("Test data added successfully.");
+    }
+
+    /// <summary>
+    /// 同步分页示例
+    /// Synchronous pagination example
+    /// </summary>
+    /// <param name="db">数据库连接对象 Database connection object</param>
+    /// <param name="pagenumber">页码 Page number</param>
+    /// <param name="pageSize">每页大小 Page size</param>
+    /// <param name="totalCount">总记录数 Total record count</param>
+    public static void SyncPagination(SqlSugarClient db, int pagenumber, int pageSize, ref int totalCount)
+    {
+        // 同步单表分页
+        // Synchronous pagination for a single table
+        var page = db.Queryable<Student>().ToPageList(pagenumber, pageSize, ref totalCount);
+
+        // 同步多表分页
+        // Synchronous pagination for multiple tables
+        var list = db.Queryable<Student>().LeftJoin<School>((st, sc) => st.SchoolId == sc.Id)
+                   .Select((st, sc) => new { Id = st.Id, Name = st.Name, SchoolName = sc.Name })
+                   .ToPageList(pagenumber, pageSize, ref totalCount);
+
+        // offset分页
+        // offset pagination
+        var sqlServerPage = db.Queryable<Student>().ToOffsetPage(pagenumber, pageSize);
+          
+    }
+
+    /// <summary>
+    /// 异步分页示例
+    /// Asynchronous pagination example
+    /// </summary>
+    /// <param name="db">数据库连接对象 Database connection object</param>
+    /// <param name="pagenumber">页码 Page number</param>
+    /// <param name="pageSize">每页大小 Page size</param>
+    public static async Task AsyncPagination(SqlSugarClient db, int pagenumber, int pageSize)
+    {
+        RefAsync<int> total = 0;
+        // 异步分页
+        // Asynchronous pagination
+        var orders = await db.Queryable<Student>().ToPageListAsync(pagenumber, pageSize, total);
+    }
+    [SugarTable("Student05")]
+    public class Student
+    {
+        [SugarColumn(IsIdentity =true,IsPrimaryKey =true)]
+        public int Id { get; set; }
+        public int SchoolId { get; set; }
+        public string Name { get; set; }
+        public DateTime CreateTime { get; set; }
+    }
+    [SugarTable("School05")]
+    public class School
+    {
+        [SugarColumn(IsIdentity = true, IsPrimaryKey = true)]
+        public int Id { get; set; }
+        public string Name { get; set; }
+    } 
+}

Src/Asp.Net/SqlServerTest/Program.cs

@@ -12,6 +12,7 @@ namespace OrmTest
             _2_DbFirst.Init();
             _3_EasyQuery.Init();
             _4_JoinQuery.Init();
+            _5_PageQuery.Init();
             Console.ReadKey();
         }
     }

Src/Asp.Net/SqlServerTest/SqlServerTest.csproj

@@ -67,6 +67,7 @@
     <Compile Include="1_CodeFirst.cs" />
     <Compile Include="2_DbFirst.cs" />
     <Compile Include="4_JoinQuery.cs" />
+    <Compile Include="5_PageQuery.cs" />
     <Compile Include="UnitTest\Description.cs" />
     <Compile Include="3_EasyQuery.cs" />
     <Compile Include="UserTestCases\Cases\OldDemo\Demo2_Updateable.cs" />