Add DuckDB

Src/Asp.NetCore2/DuckDBTest/Program.cs

@@ -0,0 +1,40 @@
+using SqlSugar;
+
+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;
+    }