C#使用時序數(shù)據(jù)庫InfluxDB的教程詳解

更新時間：2023年11月15日 09:47:50 作者：qibao16

InfluxDB是一個開源的時序數(shù)據(jù)庫,可以自動處理時間序列數(shù)據(jù),這篇文章主要為大家詳細介紹了C#如何使用InfluxDB,感興趣的小伙伴可以跟隨小編一起了解下

一、安裝

https://docs.influxdata.com/influxdb/v2/install/?t=Windows

解壓后使用cmd運行

訪問 localhost:8086

配置

第一次登入會初始化

配置登入賬號

保存TOKEN

這個TOKEN用于后期代碼鏈接訪問數(shù)據(jù)庫，忘記了只能刪除重新生成

點擊QUCK START進入管理頁面

默認配置文件

windows:在用戶文件夾下 C:\Users\Administrator.influxdbv2linux: /etc/influxdb/influxdb.conf

二、C#調用

Load Data>Sources 選擇c# 查看配置示例

創(chuàng)建一個控制臺程序

安裝InfluxDB客戶端

創(chuàng)建鏈接

using System.Linq;
using System.Threading.Tasks;
using InfluxDB.Client;
using InfluxDB.Client.Api.Domain;
using InfluxDB.Client.Core;
using InfluxDB.Client.Writes;

namespace Examples
{
  public class Examples
  {
    public static async Task Main(string[] args)
    {
      // You can generate an API token from the "API Tokens Tab" in the UI
      var token = Environment.GetEnvironmentVariable("INFLUX_TOKEN")!;
      const string bucket = "Test";
      const string org = "CC";

      using var client = new InfluxDBClient("http://127.0.0.1:8086", token);
    }
  }
}

寫入數(shù)據(jù)

//方式一、使用WriteRecord
const string data = "mem,host=host1 used_percent=23.43234543";
using (var writeApi = client.GetWriteApi())
{
  writeApi.WriteRecord(data,bucket, org, WritePrecision.Ns );
}

//方式二、使用WritePoint
var point = PointData
  .Measurement("mem")
  .Tag("host", "host1")
  .Field("used_percent", 23.43234543)
  .Timestamp(DateTime.UtcNow, WritePrecision.Ns);

using (var writeApi = client.GetWriteApi())
{
  writeApi.WritePoint(point,bucket, org);
}

//方式三、使用實體類
var mem = new Mem { Host = "host1", UsedPercent = 23.43234543, Time = DateTime.UtcNow };

using (var writeApi = client.GetWriteApi())
{
  writeApi.WriteMeasurement( mem,bucket, org, WritePrecision.Ns);
}


[Measurement("mem")]
private class Mem
{
  [Column("host", IsTag = true)] public string Host { get; set; }
  [Column("used_percent")] public double? UsedPercent { get; set; }
  [Column(IsTimestamp = true)] public DateTime Time { get; set; }
}

最終測試代碼

// See https://aka.ms/new-console-template for more information
using InfluxDB.Client;
using InfluxDB.Client.Api.Domain;
using InfluxDB.Client.Writes;

Console.WriteLine("Hello, World!");
Environment.SetEnvironmentVariable("INFLUX_TOKEN", "O9I2Kpeg...kLPSrQLWhTiJCQPWy6HJFjN9hK33UoLnG34vfFdqZ5KmoDLS-kkw==");

var token = Environment.GetEnvironmentVariable("INFLUX_TOKEN")!;
const string bucket = "Test";
const string org = "CC";

using (var client = new InfluxDBClient("http://localhost", token))
{
    using (var writeApi = client.GetWriteApi())
    {
       while (true)
        {
            var randon = new Random();
            var point = PointData
                           .Measurement("mem")
                           .Tag("host", "host1")
                           .Field("used_percent", randon.Next(10, 100)) //可以添加多個字段
                           .Field("memory_percent",randon.Next(0,10))
                           .Timestamp(DateTime.UtcNow, WritePrecision.Ns);

            writeApi.WritePoint(point, bucket, org);

            Thread.Sleep(2000);
        }
    }
}

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