Add demo

Src/Asp.Net/SqlServerTest/a1_Delete.cs

@@ -1,16 +1,186 @@
-using System;
+using SqlSugar;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace OrmTest
 {
     internal class _a1_Delete
     {
+        /// <summary>
+        /// 初始化删除操作的示例方法。
+        /// Initializes example methods for delete operations.
+        /// </summary>
         internal static void Init()
         {
+            // 获取新的数据库连接对象
+            // Get a new database connection object
+            var db = DbHelper.GetNewDb();
 
+            db.CodeFirst.InitTables<Student, Order>();
+
+            // 调用各个删除操作的示例方法
+            // Calling example methods for various delete operations
+            DeleteSingleEntity(db);
+
+            // 批量删除实体的示例方法
+            // Example method for deleting entities in batch
+            DeleteBatchEntities(db);
+
+            // 批量删除并分页的示例方法
+            // Example method for deleting entities in batch with paging
+            DeleteBatchEntitiesWithPaging(db);
+             
+            // 调用无主键实体删除的示例方法
+            // Calling example method for deleting entities without primary key
+            DeleteEntitiesWithoutPrimaryKey(db);
+
+            // 调用根据主键删除实体的示例方法
+            // Calling example method for deleting entity by primary key
+            DeleteEntityByPrimaryKey(1, db);
+             
+            // 调用根据主键数组批量删除实体的示例方法
+            // Calling example method for deleting entities by primary key array
+            DeleteEntitiesByPrimaryKeyArray(db);
+
+            // 调用根据表达式删除实体的示例方法
+            // Calling example method for deleting entities by expression
+            DeleteEntitiesByExpression(db);
+
+            // 调用联表删除实体的示例方法
+            // Calling example method for deleting entities with join
+            DeleteEntitiesWithJoin(db);
+        }
+
+        /// <summary>
+        /// 删除单个实体的示例方法。
+        /// Example method for deleting a single entity.
+        /// </summary>
+        internal static void DeleteSingleEntity(ISqlSugarClient db)
+        {
+            // 删除指定 Id 的学生实体
+            // Delete the student entity with the specified Id
+            db.Deleteable<Student>(new Student() { Id = 1 }).ExecuteCommand();
+        }
+
+        /// <summary>
+        /// 批量删除实体的示例方法。
+        /// Example method for deleting entities in batch.
+        /// </summary>
+        internal static void DeleteBatchEntities(ISqlSugarClient db)
+        {
+            // 创建学生实体列表
+            // Create a list of student entities
+            List<Student> list = new List<Student>()
+            {
+                new Student() { Id = 1 }
+            };
+
+            // 批量删除学生实体
+            // Delete student entities in batch
+            db.Deleteable<Student>(list).ExecuteCommand();
+        }
+
+        /// <summary>
+        /// 批量删除并分页的示例方法。
+        /// Example method for deleting entities in batch with paging.
+        /// </summary>
+        internal static void DeleteBatchEntitiesWithPaging(ISqlSugarClient db)
+        {
+            // 创建订单实体列表
+            // Create a list of order entities
+            List<Order> list = new List<Order>();
+
+            // 批量删除订单实体并分页
+            // Delete order entities in batch with paging
+            db.Deleteable<Order>(list).PageSize(500).ExecuteCommand();
+        }
+
+        /// <summary>
+        /// 无主键实体删除的示例方法。
+        /// Example method for deleting entities without primary key.
+        /// </summary>
+        internal static void DeleteEntitiesWithoutPrimaryKey( ISqlSugarClient db)
+        {
+            List<Order> orders = new List<Order>()
+            {
+                new Order() { Id = 1 },
+                new Order() { Id = 2 }
+            };
+
+            // 根据指定的实体列表的 Id 列进行删除
+            // Delete entities based on the Id column of the specified entity list
+            db.Deleteable<Order>().WhereColumns(orders, it => new { it.Id }).ExecuteCommand();
+        }
+
+        /// <summary>
+        /// 根据主键删除实体的示例方法。
+        /// Example method for deleting an entity by primary key.
+        /// </summary>
+        internal static void DeleteEntityByPrimaryKey(int id, ISqlSugarClient db)
+        {
+            // 根据指定的 Id 删除学生实体
+            // Delete the student entity with the specified Id
+            db.Deleteable<Student>().In(id).ExecuteCommand();
+        }
+
+        /// <summary>
+        /// 根据主键数组批量删除实体的示例方法。
+        /// Example method for deleting entities by primary key array.
+        /// </summary>
+        internal static void DeleteEntitiesByPrimaryKeyArray(ISqlSugarClient db)
+        {
+            // 定义主键数组
+            // Define an array of primary keys
+            int[] ids = { 1, 2 };
+
+            // 根据指定的 Id 数组批量删除学生实体
+            // Delete student entities in batch based on the specified Id array
+            db.Deleteable<Student>().In(ids).ExecuteCommand();
+        }
+
+        /// <summary>
+        /// 根据表达式删除实体的示例方法。
+        /// Example method for deleting entities by expression.
+        /// </summary>
+        internal static void DeleteEntitiesByExpression(ISqlSugarClient db)
+        {
+            // 根据指定的表达式删除学生实体
+            // Delete the student entity based on the specified expression
+            db.Deleteable<Student>().Where(it => it.Id == 1).ExecuteCommand();
+        }
+
+        /// <summary>
+        /// 联表删除实体的示例方法。
+        /// Example method for deleting entities with join.
+        /// </summary>
+        internal static void DeleteEntitiesWithJoin(ISqlSugarClient db)
+        {
+            // 联表删除学生实体
+            // Delete student entities with join
+            db.Deleteable<Student>()
+              .Where(p => SqlFunc.Subqueryable<Order>().Where(s => s.Id == p.SchoolId).Any())
+              .ExecuteCommand();
+        }
+
+        [SugarTable("Students_a1")]
+        public class Student
+        {
+            [SugarColumn(IsPrimaryKey = true, IsIdentity = true)] // 主键
+            public int Id { get; set; }
+
+            public string Name { get; set; }
+
+            public int SchoolId { get; set; }
+        }
+
+        [SugarTable("Orders_a2")]
+        public class Order
+        {
+            [SugarColumn(IsPrimaryKey = true, IsIdentity = true)] // 主键
+            public int Id { get; set; }
+
+            public string OrderNumber { get; set; }
+
+            public decimal Amount { get; set; }
         }
     }
 }