Add DuckDb demo

Src/Asp.NetCore2/DuckDBTest/1_CodeFirst.cs

@@ -24,6 +24,12 @@ namespace OrmTest
             // 如果数据库不存在，则创建数据库
             db.DbMaintenance.CreateDatabase();
 
+            var xx=db.DbMaintenance.IsAnyTable("UserInfo001", false);
+            var yy = db.DbMaintenance.GetColumnInfosByTableName("UserInfo001", false);
+            foreach (var item in yy)
+            {
+                Console.WriteLine($"{item.DbColumnName} {item.DataType} IsIdentity:{item.IsIdentity} IsPrimarykey:{item.IsPrimarykey} IsNullable:{item.IsNullable} ");
+            }
             // Initialize tables based on UserInfo001 entity class
             // 根据 UserInfo001 实体类初始化表
             db.CodeFirst.InitTables<UserInfo001>();
@@ -32,6 +38,8 @@ namespace OrmTest
             //表结构和类存在差异 初始化表
             db.CodeFirst.InitTables<UserInfo002>();
 
+            var dt=db.Ado.GetDataTable("select @id as id", new { id = 1 });
+
             //Insert
             //插入
             var id=db.Insertable(new UserInfo001()

Src/Asp.NetCore2/DuckDBTest/Class1.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DuckDBTest
+{
+    class Class1
+    {
+    }
+}

Src/Asp.NetCore2/DuckDBTest/DBHelper/DbHelper.cs

@@ -0,0 +1,48 @@
+using SqlSugar;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OrmTest
+{
+    /// <summary>
+    /// Helper class for database operations
+    /// 数据库操作的辅助类
+    /// </summary>
+    public class DbHelper
+    { 
+        /// <summary>
+        /// Get a new SqlSugarClient instance with specific configurations
+        /// 获取具有特定配置的新 SqlSugarClient 实例
+        /// </summary>
+        /// <returns>SqlSugarClient instance</returns>
+        public static SqlSugarClient GetNewDb()
+        {
+            //注册DLL防止找不到DLL
+            InstanceFactory.CustomAssemblies = new System.Reflection.Assembly[] {
+            typeof(SqlSugar.DuckDB.DuckDBProvider).Assembly };
+
+            //创建DB
+            var db = new SqlSugarClient(new ConnectionConfig()
+            {
+                IsAutoCloseConnection = true,
+                DbType = DbType.DuckDB,
+                ConnectionString = "DataSource = train_services.db",
+                LanguageType = LanguageType.Default//Set language
+
+            },
+            it =>
+            {
+                // Logging SQL statements and parameters before execution
+                // 在执行前记录 SQL 语句和参数
+                it.Aop.OnLogExecuting = (sql, para) =>
+                {
+                    Console.WriteLine(UtilMethods.GetNativeSql(sql, para));
+                };
+            });
+            return db;
+        }
+    }
+}

Src/Asp.NetCore2/DuckDBTest/Program.cs

@@ -1,40 +1,5 @@
 using SqlSugar;
-
+using OrmTest;
+_1_CodeFirst.Init();
+Console.WriteLine("DEMO执行完成");
 Console.Read();
-/// <summary>
-/// Helper class for database operations
-/// 数据库操作的辅助类
-/// </summary>
-public class DbHelper
-{
-    /// <summary>
-    /// Database connection string
-    /// 数据库连接字符串
-    /// </summary>
-    public readonly static string Connection = "DataSource = train_services.db";
-
-    /// <summary>
-    /// Get a new SqlSugarClient instance with specific configurations
-    /// 获取具有特定配置的新 SqlSugarClient 实例
-    /// </summary>
-    /// <returns>SqlSugarClient instance</returns>
-    public static SqlSugarClient GetNewDb()
-    {
-        var db = new SqlSugarClient(new ConnectionConfig()
-        {
-            IsAutoCloseConnection = true,
-            DbType = DbType.DuckDB,
-            ConnectionString = Connection,
-            LanguageType = LanguageType.Default//Set language
-
-        },
-        it => {
-            // Logging SQL statements and parameters before execution
-            // 在执行前记录 SQL 语句和参数
-            it.Aop.OnLogExecuting = (sql, para) =>
-            {
-                Console.WriteLine(UtilMethods.GetNativeSql(sql, para));
-            };
-        });
-        return db;
-    }