SQLite带参数处理方法

/// <summary>
        /// 执行语法[新增 修改  删除]
        /// </summary>
        /// <param name="sqlText">sql语法</param>
        /// <returns></returns>
        public async Task<int> ExecuteNoneQuery(string sqlText, SQLiteParameter[] spr)
        {
            SQLiteConnection cn = new SQLiteConnection(_datasource);
            //连接数据库
            cn.ConnectionString = GetSQLiteConnectionString(_datasource);
            cn.Open();
            SQLiteCommand cmd = new SQLiteCommand();
            cmd.Connection = cn;
            cmd.CommandText = sqlText;
            //多个参数
            foreach (SQLiteParameter sp in spr)
            {
                cmd.Parameters.Add(sp);
            }

            int count = await cmd.ExecuteNonQueryAsync();
            cn.Close();
            return count;
        }

        /// <summary>
        /// 获取连接字符串
        /// </summary>
        /// <param name="datasource">连接字符串</param>
        /// <returns></returns>
        public string GetSQLiteConnectionString(string datasource)
        {
            //连接数据库
            SQLiteConnectionStringBuilder connstr = new SQLiteConnectionStringBuilder();
            connstr.DataSource = datasource;
            connstr.Password = "123456";//设置密码，SQLite ADO.NET实现了数据库密码保护
            return connstr.ToString();
        }

<connectionStrings>
<add name="DefaultConnection" connectionString="DataBase//fang_cheng.db" />
</connectionStrings>

                SQLiteParameter[] spr = { new SQLiteParameter("@Code", productCode) };
                affectRow = await ExecuteNoneQuery(sqlText, spr);