C#連接mysql數據庫插入數據后獲取自增長主鍵ID值

From: http://blog.csdn.net/zbc496218/article/details/51082983

    MySqlConnection conn = new MySqlConnection("連接數據庫字符串");  
    conn.Open();  
    MySqlCommand mycmd = new MySqlCommand();  
    mycmd.Connection = conn;  
    mycmd.CommandType = CommandType.Text;  
    mycmd.CommandText = "insert into product(productname) values ("產品名稱");";  
    mycmd.ExecuteNonQuery();  
    //獲取插入后的數據ID  
    long newid = mycmd.LastInsertedId;