79 lines
3.2 KiB
C#
79 lines
3.2 KiB
C#
using System;
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using TDengine.Driver;
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using TDengine.Driver.Client;
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namespace Examples
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{
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public class WSStmtExample
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{
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// ANCHOR: main
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public static void Main(string[] args)
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{
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var host = "127.0.0.1";
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var numOfSubTable = 10;
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var numOfRow = 10;
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var random = new Random();
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var connectionString = $"protocol=WebSocket;host={host};port=6041;useSSL=false;username=root;password=taosdata";
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try
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{
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var builder = new ConnectionStringBuilder(connectionString);
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using (var client = DbDriver.Open(builder))
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{
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// create database
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client.Exec("CREATE DATABASE IF NOT EXISTS power");
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// use database
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client.Exec("USE power");
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// create table
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client.Exec(
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"CREATE STABLE IF NOT EXISTS meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
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using (var stmt = client.StmtInit())
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{
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String sql = "INSERT INTO ? USING meters TAGS(?,?) VALUES (?,?,?,?)";
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stmt.Prepare(sql);
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for (int i = 1; i <= numOfSubTable; i++)
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{
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var tableName = $"d_bind_{i}";
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// set table name
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stmt.SetTableName(tableName);
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// set tags
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stmt.SetTags(new object[] { i, $"location_{i}" });
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var current = DateTime.Now;
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// bind rows
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for (int j = 0; j < numOfRow; j++)
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{
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stmt.BindRow(new object[]
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{
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current.Add(TimeSpan.FromMilliseconds(j)),
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random.NextSingle() * 30,
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random.Next(300),
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random.NextSingle()
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});
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}
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// add batch
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stmt.AddBatch();
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// execute
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stmt.Exec();
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// get affected rows
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var affectedRows = stmt.Affected();
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Console.WriteLine($"Successfully inserted {affectedRows} rows to {tableName}.");
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}
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}
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}
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}
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catch (TDengineError e)
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{
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// handle TDengine error
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Console.WriteLine("Failed to insert to table meters using stmt, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
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throw;
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}
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catch (Exception e)
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{
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// handle other exceptions
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Console.WriteLine("Failed to insert to table meters using stmt, ErrMessage: " + e.Message);
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throw;
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}
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}
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// ANCHOR_END: main
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}
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}
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