public override bool Open(bool errorsExpected = false)
{
bool result = false;
_connection.ConnectionStringBuilder.ForceDatabaseName = true;
_connection.Open();
if (_connection.ConnectionStringBuilder.ForceDatabaseName)
{
var obj = _connection.CreateCommand("SELECT database()").ExecuteScalar();
if (obj == DBNull.Value)
{
try
{
_connection.ChangeDatabase(_connection.Database);
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
}
result = _connection.State == System.Data.ConnectionState.Open;
return(result);
}
private bool CheckDataBase()
{
if (!dbisok)
{
dbisok = Retry.RetryOnAny(10, f =>
{
TaosConnection _taos = _taospool.Get();
{
var _taosBuilder = new TaosConnectionStringBuilder(_taos.ConnectionString);
if (_taos.State != System.Data.ConnectionState.Open)
{
_taos.Open();
}
_taos.CreateCommand($"CREATE DATABASE IF NOT EXISTS {_taosBuilder.DataBase} KEEP 365 DAYS 10 BLOCKS 4;").ExecuteNonQuery();
_taos.ChangeDatabase(_taosBuilder.DataBase);
_taos.CreateCommand("CREATE TABLE IF NOT EXISTS telemetrydata (ts timestamp,value_type tinyint, value_boolean bool, value_string binary(10240), value_long bigint,value_datetime timestamp,value_double double) TAGS (deviceid binary(32),keyname binary(64));")
.ExecuteNonQuery();
dbisok = true;
_taospool.Return(_taos);
}
return(true);
}, ef =>
{
_logger.LogError(ef.ex, $"CheckDataBase第{ef.current}次失败{ef.ex.Message} {ef.ex.InnerException?.Message} ");
});
}
return(dbisok);
}
public override bool Open(bool errorsExpected = false)
{
_connection.Open();
_connection._nowdatabase = string.Empty;
bool result = _connection.State == System.Data.ConnectionState.Open;
_connection.ChangeDatabase(_connection.Database);
return(result);
}
public Task <List <TelemetryDataDto> > GetTelemetryLatest(Guid deviceId)
{
TaosConnection _taos = _taospool.Get();
_taos.ChangeDatabase(_taos.Database);
if (_taos.State != System.Data.ConnectionState.Open)
{
_taos.Open();
}
//https://github.com/taosdata/TDengine/issues/4269
string sql = $"select last_row(*) from telemetrydata where deviceid='{deviceId:N}' group by deviceid,keyname";
List <TelemetryDataDto> dt = SqlToTDD(_taos, sql, "last_row(", ")", string.Empty);
_taospool.Return(_taos);
return(Task.FromResult(dt));
}
static void Main(string[] args)
{
System.Text.Encoding.RegisterProvider(System.Text.CodePagesEncodingProvider.Instance);
DbProviderFactories.RegisterFactory("TDengine", TaosFactory.Instance);
///Specify the name of the database
string database = "db_" + DateTime.Now.ToString("yyyyMMddHHmmss");
var builder = new TaosConnectionStringBuilder()
{
DataSource = "taos",
DataBase = database,
Username = "******",
Password = "******",
Port = 6030
};
//Example for ADO.Net
using (var connection = new TaosConnection(builder.ConnectionString))
{
connection.Open();
Console.WriteLine("ServerVersion:{0}", connection.ServerVersion);
Console.WriteLine("create {0} {1}", database, connection.CreateCommand($"create database {database};").ExecuteNonQuery());
Console.WriteLine("create table t {0} {1}", database, connection.CreateCommand($"create table {database}.t (ts timestamp, cdata int);").ExecuteNonQuery());
Console.WriteLine("insert into t values {0} ", connection.CreateCommand($"insert into {database}.t values ({(long)(DateTime.Now.Subtract(new DateTime(1970, 1, 1, 0, 0, 0, 0)).TotalMilliseconds)}, 10);").ExecuteNonQuery());
var pmcmd = connection.CreateCommand($"insert into {database}.t values (@t, @c);");
Thread.Sleep(TimeSpan.FromSeconds(1));
pmcmd.Parameters.AddWithValue("@t", (long)(DateTime.Now.Subtract(new DateTime(1970, 1, 1, 0, 0, 0, 0)).TotalMilliseconds));
pmcmd.Parameters.AddWithValue("@c", 1111);
pmcmd.ExecuteNonQuery();
Console.WriteLine("insert into t values {0} ", connection.CreateCommand($"insert into {database}.t values ({(long)(DateTime.Now.Subtract(new DateTime(1970, 1, 1, 0, 0, 0, 0)).TotalMilliseconds)}, 10);").ExecuteNonQuery());
//Console.WriteLine("insert into t values {0} ", connection.CreateCommand($"insert into {database}.t values ({(long)(DateTime.Now.AddMonths(1).Subtract(new DateTime(1970, 1, 1, 0, 0, 0, 0)).TotalMilliseconds)}, 20);").ExecuteNonQuery());
var cmd_select = connection.CreateCommand();
cmd_select.CommandText = $"select * from {database}.t;";
var reader = cmd_select.ExecuteReader();
int index = reader.GetOrdinal("cdata");
Console.WriteLine($"cdata index at {index}");
Console.WriteLine(cmd_select.CommandText);
Console.WriteLine("");
ConsoleTableBuilder.From(reader.ToDataTable()).WithFormat(ConsoleTableBuilderFormat.MarkDown).ExportAndWriteLine();
Console.WriteLine("");
connection.CreateCommand($"CREATE TABLE datas ('reportTime' timestamp, type int, 'bufferedEnd' bool, address nchar(64), parameter nchar(64), value nchar(64)) TAGS ('boxCode' nchar(64), 'machineId' int);").ExecuteNonQuery();
connection.CreateCommand($"INSERT INTO data_history_67 USING datas TAGS (mongo, 67) values ( 1608173534840 2 false 'Channel1.窑.烟囱温度' '烟囱温度' '122.00' );").ExecuteNonQuery();
var cmd_datas = connection.CreateCommand();
cmd_datas.CommandText = $"SELECT reportTime,type,bufferedEnd,address,parameter,value FROM {database}.data_history_67 LIMIT 100";
var readerdatas = cmd_datas.ExecuteReader();
Console.WriteLine(cmd_datas.CommandText);
Console.WriteLine("");
ConsoleTableBuilder.From(readerdatas.ToDataTable()).WithFormat(ConsoleTableBuilderFormat.Default).ExportAndWriteLine();
Console.WriteLine("");
Console.WriteLine("CREATE TABLE meters ", connection.CreateCommand($"CREATE TABLE meters (ts timestamp, current float, voltage int, phase float) TAGS (location binary(64), groupdId int);").ExecuteNonQuery());
Console.WriteLine("CREATE TABLE d1001 ", connection.CreateCommand($"CREATE TABLE d1001 USING meters TAGS (\"Beijing.Chaoyang\", 2);").ExecuteNonQuery());
Console.WriteLine("INSERT INTO d1001 ", connection.CreateCommand($"INSERT INTO d1001 USING METERS TAGS(\"Beijng.Chaoyang\", 2) VALUES(now, 10.2, 219, 0.32);").ExecuteNonQuery());
Console.WriteLine("DROP TABLE {0} {1}", database, connection.CreateCommand($"DROP TABLE {database}.t;").ExecuteNonQuery());
Console.WriteLine("DROP DATABASE {0} {1}", database, connection.CreateCommand($"DROP DATABASE {database};").ExecuteNonQuery());
connection.CreateCommand("DROP DATABASE IF EXISTS IoTSharp").ExecuteNonQuery();
connection.CreateCommand("CREATE DATABASE IoTSharp KEEP 365 DAYS 10 BLOCKS 4;").ExecuteNonQuery();
connection.ChangeDatabase("IoTSharp");
connection.CreateCommand("CREATE STABLE IF NOT EXISTS telemetrydata (ts timestamp,value_type tinyint, value_boolean bool, value_string binary(10240), value_long bigint,value_datetime timestamp,value_double double) TAGS (deviceid binary(32),keyname binary(64));").ExecuteNonQuery();
//connection.CreateCommand($"CREATE TABLE dev_Thermometer USING telemetrydata TAGS (\"Temperature\")").ExecuteNonQuery();
var devid = $"{Guid.NewGuid():N}";
UploadTelemetryData(connection, devid, "Temperature", 999);
UploadTelemetryData(connection, devid, "Humidity", 888);
var devid2 = $"{Guid.NewGuid():N}";
UploadTelemetryData(connection, devid2, "Temperature", 777);
UploadTelemetryData(connection, devid2, "Humidity", 666);
var reader2 = connection.CreateCommand("select last_row(*) from telemetrydata group by deviceid,keyname ;").ExecuteReader();
ConsoleTableBuilder.From(reader2.ToDataTable()).WithFormat(ConsoleTableBuilderFormat.Default).ExportAndWriteLine();
Console.WriteLine("DROP DATABASE IoTSharp", database, connection.CreateCommand($"DROP DATABASE IoTSharp;").ExecuteNonQuery());
connection.Close();
}
//Example for Entity Framework Core
using (var context = new TaosContext(new DbContextOptionsBuilder()
.UseTaos(builder.ConnectionString).Options))
{
Console.WriteLine("EnsureCreated");
context.Database.EnsureCreated();
for (int i = 0; i < 10; i++)
{
var rd = new Random();
context.sensor.Add(new sensor()
{
ts = DateTime.Now.AddMilliseconds(i + 10), degree = rd.NextDouble(), pm25 = rd.Next(0, 1000)
});
Thread.Sleep(10);
}
Console.WriteLine("Saveing");
context.SaveChanges();
Console.WriteLine("");
Console.WriteLine("from s in context.sensor where s.pm25 > 0 select s ");
Console.WriteLine("");
var f = from s in context.sensor where s.pm25 > 0 select s;
var ary = f.ToArray();
if (ary.Any())
{
ConsoleTableBuilder.From(ary.ToList()).WithFormat(ConsoleTableBuilderFormat.MarkDown).ExportAndWriteLine();
}
context.Database.EnsureDeleted();
}
}
static void Main(string[] args)
{
System.Text.Encoding.RegisterProvider(System.Text.CodePagesEncodingProvider.Instance);
///Specify the name of the database
string database = "db_" + DateTime.Now.ToString("yyyyMMddHHmmss");
var builder = new TaosConnectionStringBuilder()
{
DataSource = "taos",
DataBase = database,
Username = "******",
Password = "******",
Port = 6030
};
//Example for ADO.Net
using (var connection = new TaosConnection(builder.ConnectionString))
{
connection.Open();
Console.WriteLine("ServerVersion:{0}", connection.ServerVersion);
Console.WriteLine("create {0} {1}", database, connection.CreateCommand($"create database {database};").ExecuteNonQuery());
connection.ChangeDatabase(database);
Console.WriteLine("create table t {0} {1}", database, connection.CreateCommand($"create table {database}.t (ts timestamp, cdata int);").ExecuteNonQuery());
Console.WriteLine("insert into t values {0} ", connection.CreateCommand($"insert into {database}.t values ({(long)(DateTime.Now.Subtract(new DateTime(1970, 1, 1, 0, 0, 0, 0)).TotalMilliseconds)}, 10);").ExecuteNonQuery());
var pmcmd = connection.CreateCommand($"insert into {database}.t values (@t, @c);");
Thread.Sleep(TimeSpan.FromSeconds(1));
pmcmd.Parameters.AddWithValue("@t", (long)(DateTime.Now.Subtract(new DateTime(1970, 1, 1, 0, 0, 0, 0)).TotalMilliseconds));
pmcmd.Parameters.AddWithValue("@c", 1111);
pmcmd.ExecuteNonQuery();
Console.WriteLine("insert into t values {0} ", connection.CreateCommand($"insert into {database}.t values ({(long)(DateTime.Now.Subtract(new DateTime(1970, 1, 1, 0, 0, 0, 0)).TotalMilliseconds)}, 10);").ExecuteNonQuery());
//Console.WriteLine("insert into t values {0} ", connection.CreateCommand($"insert into {database}.t values ({(long)(DateTime.Now.AddMonths(1).Subtract(new DateTime(1970, 1, 1, 0, 0, 0, 0)).TotalMilliseconds)}, 20);").ExecuteNonQuery());
var cmd_select = connection.CreateCommand();
#pragma warning disable CA2100 // Review SQL queries for security vulnerabilities
cmd_select.CommandText = $"select * from {database}.t";
#pragma warning restore CA2100 // Review SQL queries for security vulnerabilities
var reader = cmd_select.ExecuteReader();
Console.WriteLine(cmd_select.CommandText);
Console.WriteLine("");
ConsoleTableBuilder.From(reader.ToDataTable()).WithFormat(ConsoleTableBuilderFormat.MarkDown).ExportAndWriteLine();
Console.WriteLine("");
Console.WriteLine("CREATE TABLE meters ", connection.CreateCommand($"CREATE TABLE meters (ts timestamp, current float, voltage int, phase float) TAGS (location binary(64), groupdId int);").ExecuteNonQuery());
Console.WriteLine("CREATE TABLE d1001 ", connection.CreateCommand($"CREATE TABLE d1001 USING meters TAGS (\"Beijing.Chaoyang\", 2);").ExecuteNonQuery());
Console.WriteLine("INSERT INTO d1001 ", connection.CreateCommand($"INSERT INTO d1001 USING METERS TAGS(\"Beijng.Chaoyang\", 2) VALUES(now, 10.2, 219, 0.32);").ExecuteNonQuery());
Console.WriteLine("DROP TABLE {0} {1}", database, connection.CreateCommand($"DROP TABLE {database}.t;").ExecuteNonQuery());
Console.WriteLine("DROP DATABASE {0} {1}", database, connection.CreateCommand($"DROP DATABASE {database};").ExecuteNonQuery());
connection.Close();
}
//Example for Entity Framework Core
using (var context = new TaosContext(new DbContextOptionsBuilder()
.UseTaos(builder.ConnectionString).Options))
{
Console.WriteLine("EnsureCreated");
context.Database.EnsureCreated();
for (int i = 0; i < 10; i++)
{
var rd = new Random();
context.sensor.Add(new sensor()
{
ts = DateTime.Now.AddMilliseconds(i + 10), degree = rd.NextDouble(), pm25 = rd.Next(0, 1000)
});
Thread.Sleep(10);
}
Console.WriteLine("Saveing");
context.SaveChanges();
Console.WriteLine("");
Console.WriteLine("from s in context.sensor where s.pm25 > 0 select s ");
Console.WriteLine("");
var f = from s in context.sensor where s.pm25 > 0 select s;
var ary = f.ToArray();
if (ary.Any())
{
ConsoleTableBuilder.From(ary.ToList()).WithFormat(ConsoleTableBuilderFormat.MarkDown).ExportAndWriteLine();
}
context.Database.EnsureDeleted();
}
}