c# - 在 C# 控制台应用程序中每 10 秒从 api 更新一次恒温器结果

Question

我需要帮助以每 10 秒从 thingspeak.io API 更新恒温器温度。我从 thingspeak channel 获取 JSON 数据，并将其转换并显示在控制台中。

到目前为止，这是我的代码

string url = "http://api.thingspeak.com/channels/135/feed.json";

WebClient webClient = new WebClient();
var data = webClient.DownloadString(url);
dynamic feed = JsonConvert.DeserializeObject<dynamic>(data);
List<dynamic> feeds = feed.feeds.ToObject<List<dynamic>>();
string field1 = feeds.Last().field1;
float temperature = float.Parse(field1, CultureInfo.InvariantCulture);

Console.WriteLine("----------CURRENT CHANNEL----------");
Console.WriteLine("\n");
Console.WriteLine("Channel name: " + feed.channel.name);
Console.WriteLine("Temperature: " + temperature.ToString() + " °C");
Console.WriteLine("\n");

int trenutna_temp = Convert.ToInt32(temperature);

Console.WriteLine("----------DEVICES----------");

if (trenutna_temp < 10)
{
    Console.WriteLine("turn on heating);
}
else if (trenutna_temp > 10 && trenutna_temp < 20)
{
    Console.WriteLine("turn off");
}
else if (trenutna_temp > 20)
{
    Console.WriteLine("Turn on cooling");
}
Console.ReadLine();

现在我想每 10 秒更新一次此数据。如果你们中的任何人能指出正确的方向或帮助我修复代码，我将不胜感激。

Answer 1

一种选择是使用 System.Threading.Timer:

public static void Main() 
{  
   System.Threading.Timer t = new System.Threading.Timer(UpdateThermostat, 5, 0, 2000); //10 times 1000 miliseconds
   Console.ReadLine();
   t.Dispose(); // dispose the timer
}


private static void UpdateThermostat(Object state) 
{ 
   // your code to get your thermostat
   //option one to print on the same line:
   //move the cursor to the beginning of the line before printing:
    Console.SetCursorPosition(0, Console.CursorTop);
    Console.Write(DateTime.Now);

   //option two to print on the same line:
   //printing "\r" moves cursor back to the beginning of the line so it's a trick:
    Console.Write("\r{0}",DateTime.Now);
}

Timer MSDN documentation here