Giter VIP home page Giter VIP logo

Comments (10)

hjxilinx avatar hjxilinx commented on May 17, 2024 7

We will provide the C# and library for windows soon. Please wait for a few weeks.

from tdengine.

maikebing avatar maikebing commented on May 17, 2024 1

https://github.com/maikebing/Maikebing.EntityFrameworkCore.Taos

from tdengine.

maikebing avatar maikebing commented on May 17, 2024 1
string database = "db_" + DateTime.Now.ToString("yyyyMMddHHmmss");
 var builder = new TaosConnectionStringBuilder()
    {
        DataSource = "http://td.gitclub.cn/rest/sql",
        DataBase = database,
        // Token = "cm9vdDp0YW9zZGF0YQ=="
        Username="root",
        Password= "taosdata"
    };
using (var connection = new TaosConnection(builder.ConnectionString))
{
    connection.Open();
    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($"insert into {database}.t values ('{DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.ms")}', 10);").ExecuteNonQuery());
    Console.WriteLine("insert into t values  {0} ", connection.CreateCommand($"insert into {database}.t values ('{DateTime.Now.AddMonths(1).ToString("yyyy-MM-dd HH:mm:ss.ms")}', 20);").ExecuteNonQuery());
    var cmd_select = connection.CreateCommand();
    cmd_select.CommandText = $"select * from {database}.t";
    var reader = cmd_select.ExecuteReader();
    List<Dictionary<string, object>> valuePairs = new List<Dictionary<string, object>>();
    while (reader.Read())
    {
        Dictionary<string, object> pairs = new Dictionary<string, object>();
        for (int i = 0; i < reader.FieldCount; i++)
        {
            pairs.Add(reader.GetName(i), reader.GetValue(i));
        }
        valuePairs.Add(pairs);
    }
    Console.WriteLine(Newtonsoft.Json.JsonConvert.SerializeObject(valuePairs));
    Console.WriteLine("DROP TABLE  {0} {1}", database, connection.CreateCommand($"DROP TABLE  {database}.t;").ExecuteNonQuery());
    Console.WriteLine("DROP DATABASE {0} {1}", database, connection.CreateCommand($"DROP DATABASE   {database}").ExecuteNonQuery());
    Console.ReadKey();
    connection.Close();
}

from tdengine.

masterchen avatar masterchen commented on May 17, 2024

Well, i have the same questions, is it possible to call TDEngine via C++ lib from C# application ?@windjmj

from tdengine.

HuarenYu avatar HuarenYu commented on May 17, 2024

Restfull api is an alternative choice

from tdengine.

masterchen avatar masterchen commented on May 17, 2024

yep,restful api indeed can meet your requirment, but cannt subscribe ,right?

from tdengine.

codedever avatar codedever commented on May 17, 2024

If the TDengine can support C# for dotnet core platform, it will be better, after all, dotnet core is the future.

from tdengine.

codedever avatar codedever commented on May 17, 2024

OK, restful api to ef.core is the first step, we still need more reliable and more efficient connection api from official.

from tdengine.

maikebing avatar maikebing commented on May 17, 2024
///Specify the name of the database
string database = "db_" + DateTime.Now.ToString("yyyyMMddHHmmss");
var builder = new TaosConnectionStringBuilder()
{
    DataSource = "http://td.gitclub.cn/rest/sql",
    DataBase = database,
    Username = "root",
    Password = "taosdata"
};
//Example for ADO.Net 
using (var connection = new TaosConnection(builder.ConnectionString))
{
    connection.Open();
    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($"insert into {database}.t values ('{DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.ms")}', 10);").ExecuteNonQuery());
    Console.WriteLine("insert into t values  {0} ", connection.CreateCommand($"insert into {database}.t values ('{DateTime.Now.AddMonths(1).ToString("yyyy-MM-dd HH:mm:ss.ms")}', 20);").ExecuteNonQuery());
    Console.WriteLine("==================================================================");
    var cmd_select = connection.CreateCommand();
    cmd_select.CommandText = $"select * from {database}.t";
    var reader = cmd_select.ExecuteReader();
    ConsoleTableBuilder.From(reader.ToDataTable()).WithFormat(ConsoleTableBuilderFormat.MarkDown).ExportAndWriteLine();
    Console.WriteLine("==================================================================");
    Console.WriteLine("DROP TABLE  {0} {1}", database, connection.CreateCommand($"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), degree = rd.NextDouble(), pm25 = rd.Next(0, 1000) });
    }
    Console.WriteLine("SaveChanges.....");
    context.SaveChanges();
    Console.WriteLine("==================================================================");
    Console.WriteLine("Search   pm25>0");
    var f = from s in context.sensor where s.pm25 > 0 select s;
    var ary = f.ToArray();
    ConsoleTableBuilder.From(ary.ToList()).WithFormat(ConsoleTableBuilderFormat.MarkDown).ExportAndWriteLine();
    Console.WriteLine("==================================================================");
    context.Database.EnsureDeleted();
}
}

from tdengine.

hzcheng avatar hzcheng commented on May 17, 2024

#51

from tdengine.

Related Issues (20)

Recommend Projects

  • React photo React

    A declarative, efficient, and flexible JavaScript library for building user interfaces.

  • Vue.js photo Vue.js

    🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.

  • Typescript photo Typescript

    TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

  • TensorFlow photo TensorFlow

    An Open Source Machine Learning Framework for Everyone

  • Django photo Django

    The Web framework for perfectionists with deadlines.

  • D3 photo D3

    Bring data to life with SVG, Canvas and HTML. 📊📈🎉

Recommend Topics

  • javascript

    JavaScript (JS) is a lightweight interpreted programming language with first-class functions.

  • web

    Some thing interesting about web. New door for the world.

  • server

    A server is a program made to process requests and deliver data to clients.

  • Machine learning

    Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.

  • Game

    Some thing interesting about game, make everyone happy.

Recommend Org

  • Facebook photo Facebook

    We are working to build community through open source technology. NB: members must have two-factor auth.

  • Microsoft photo Microsoft

    Open source projects and samples from Microsoft.

  • Google photo Google

    Google ❤️ Open Source for everyone.

  • D3 photo D3

    Data-Driven Documents codes.