使用Azure Function进行后台任务处理

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使用定时触发器，你可以设置函数在特定时间自动执行。以下是一个简单的示例，展示了如何实现每天自动清理过期数据的功能。

using System;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Host;
using Microsoft.Extensions.Logging;
using Microsoft.ApplicationInsights;
using Microsoft.ApplicationInsights.Extensibility;
using System;


namespace Azure_FunctionApp_Example
{
    public class Function2
    {
	    private static TelemetryClient telemetryClient = new TelemetryClient(new TelemetryConfiguration { InstrumentationKey = "65104760-9112-4574-b454-e4cf38daddc3" });


        [FunctionName("Function2")]
        public void Run([TimerTrigger("0 */5 * * * *")]TimerInfo myTimer, ILogger log)
        {
            log.LogInformation($"C# Timer trigger function executed at: {DateTime.Now}");

            int deletedItems = CleanUpOldData();
            log.LogInformation($"{deletedItems} items deleted.");
        }

        private static int CleanUpOldData()
        {
	        Random random = new Random();
	        int randomNumber = random.Next(1, 10);
	        if (randomNumber <= 8)
	        {
		        TrackException(new Exception("Timer CleanDb Error"));
	        }

	        return randomNumber; 
        }

        public static void TrackEvent(string eventName, string message)
        {
	        telemetryClient.TrackEvent(eventName, new System.Collections.Generic.Dictionary<string, string> { { "Message", message } });
        }

        public static void TrackException(Exception exception)
        {
	        telemetryClient.TrackException(exception);
        }
    }
}