Update demo

Src/Asp.Net/SqlServerTest/3_EasyQuery.cs

@@ -4,26 +4,58 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using SqlSugar;
+
 namespace OrmTest
 {
     internal class _3_EasyQuery
     {
-      
-
+        /// <summary>
+        /// 初始化方法，包含各种查询操作的演示
+        /// Initialization method containing demonstrations of various query operations
+        /// </summary>
         public static void Init()
         {
-
+            // 创建表并插入一条记录
+            // Create table and insert a record
             CreateTable();
+
+            // 查询所有学生信息
+            // Query all student records
             GetAllStudents();
+
+            // 查询学生总数
+            // Get the total count of students
             GetStudentCount();
+
+            // 按条件查询学生信息
+            // Query student records based on conditions
             GetStudentsByCondition();
+
+            // 模糊查询学生信息（名字包含"jack"的学生）
+            // Fuzzy search for student records (students with names containing "jack")
             GetStudentsByName("jack");
+
+            // 根据学生ID查询单个学生
+            // Query a single student by student ID
             GetStudentById(1);
+
+            // 获取Student03表中的最大Id
+            // Get the maximum ID from the Student03 table
             GetMaxStudentId();
+
+            // 简单排序（按照Id降序排序）
+            // Simple sorting (sorting by Id in descending order)
             GetStudentsOrderedByIdDesc();
+
+            // 查询学生姓名列表
+            // Query the list of student names
             GetStudentNames();
         }
 
+        /// <summary>
+        /// 创建表并插入一条记录
+        /// Create table and insert a record
+        /// </summary>
         private static void CreateTable()
         {
             SqlSugarClient db = DbHelper.GetNewDb();
@@ -32,32 +64,38 @@ namespace OrmTest
                 .ExecuteCommand();
         }
 
-        // 查询所有学生信息
-        // Query all student records
-        public  static List<Student03> GetAllStudents()
+        /// <summary>
+        /// 查询所有学生信息
+        /// Query all student records
+        /// </summary>
+        private static void GetAllStudents()
         {
             SqlSugarClient db = DbHelper.GetNewDb();
-            return db.Queryable<Student03>().ToList();
+            var students = db.Queryable<Student03>().ToList();
+            // 处理查询结果
+            // Process the query results
         }
 
-        // 查询学生总数
-        // Get the total count of students
-        public static int GetStudentCount()
+        /// <summary>
+        /// 查询学生总数
+        /// Get the total count of students
+        /// </summary>
+        private static void GetStudentCount()
         {
             SqlSugarClient db = DbHelper.GetNewDb();
-            return db.Queryable<Student03>().Count();
+            var count = db.Queryable<Student03>().Count();
+            // 处理查询结果
+            // Process the query results
         }
 
-        // 按条件查询学生信息
-        // Query student records based on conditions
-        public static List<Student03> GetStudentsByCondition()
+        /// <summary>
+        /// 按条件查询学生信息
+        /// Query student records based on conditions
+        /// </summary>
+        private static void GetStudentsByCondition()
         {
             SqlSugarClient db = DbHelper.GetNewDb();
 
-            // 查询Id为1的学生
-            // Query students with Id equal to 1
-            var studentsWithId1 = db.Queryable<Student03>().Where(it => it.Id == 1).ToList();
-
             // 查询name字段不为null的学生
             // Query students where the 'name' field is not null
             var studentsWithNameNotNull = db.Queryable<Student03>().Where(it => it.Name != null).ToList();
@@ -81,57 +119,73 @@ namespace OrmTest
             exp.Or(it => it.Name.Contains("jack"));
             var studentsWithDynamicOr = db.Queryable<Student03>().Where(exp.ToExpression()).ToList();
              
-            return studentsWithDynamicOr;
         }
 
-        // 模糊查询
-        // Fuzzy search
-        public static List<Student03> GetStudentsByName(string keyword)
+        /// <summary>
+        /// 模糊查询学生信息
+        /// Fuzzy search for student records
+        /// </summary>
+        private static void GetStudentsByName(string keyword)
         {
             SqlSugarClient db = DbHelper.GetNewDb();
-            return db.Queryable<Student03>().Where(it => it.Name.Contains(keyword)).ToList();
+            var students = db.Queryable<Student03>().Where(it => it.Name.Contains(keyword)).ToList();
+            // 处理查询结果
+            // Process the query results
         }
 
-        // 根据主键查询单个学生
-        // Query a single student by primary key
-        public static Student03 GetStudentById(int id)
+        /// <summary>
+        /// 根据学生ID查询单个学生
+        /// Query a single student by student ID
+        /// </summary>
+        private static void GetStudentById(int id)
         {
             SqlSugarClient db = DbHelper.GetNewDb();
-            return db.Queryable<Student03>().Single(it => it.Id == id);
+            var student = db.Queryable<Student03>().Single(it => it.Id == id);
+            // 处理查询结果
+            // Process the query results
         }
 
-        // 获取订单表中的最大Id
-        // Get the maximum Id from the Student03 table
-        public static int GetMaxStudentId()
+        /// <summary>
+        /// 获取Student03表中的最大Id
+        /// Get the maximum ID from the Student03 table
+        /// </summary>
+        private static void GetMaxStudentId()
         {
             SqlSugarClient db = DbHelper.GetNewDb();
-            return db.Queryable<Student03>().Max(it => it.Id);
+            var maxId = db.Queryable<Student03>().Max(it => it.Id);
+            // 处理查询结果
+            // Process the query results
         }
 
-        // 简单排序
-        // Simple sorting
-        public static List<Student03> GetStudentsOrderedByIdDesc()
+        /// <summary>
+        /// 简单排序（按照Id降序排序）
+        /// Simple sorting (sorting by Id in descending order)
+        /// </summary>
+        private static void GetStudentsOrderedByIdDesc()
         {
             SqlSugarClient db = DbHelper.GetNewDb();
-            return db.Queryable<Student03>().OrderBy(sc => sc.Id, OrderByType.Desc).ToList();
+            var students = db.Queryable<Student03>().OrderBy(sc => sc.Id, OrderByType.Desc).ToList();
+            // 处理查询结果
+            // Process the query results
         }
 
-        // 查询一列
-        // Query a single column
-        public static List<string> GetStudentNames()
+        /// <summary>
+        /// 查询学生姓名列表
+        /// Query the list of student names
+        /// </summary>
+        private static void GetStudentNames()
         {
             SqlSugarClient db = DbHelper.GetNewDb();
-            return db.Queryable<Student03>().Select(it => it.Name).ToList();
+            var studentNames = db.Queryable<Student03>().Select(it => it.Name).ToList();
+            // 处理查询结果
+            // Process the query results
         }
 
-
-
         public class Student03
         {
-            [SugarColumn(IsPrimaryKey =true,IsIdentity =true)]
+            [SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
             public int Id { get; set; }
             public string Name { get; set; }
         }
-         
     }
 }