How to programmatically press Enter button without keyboard in Console Application

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I am trying to write function which press enter button programmatically after every 5 minutes without keyboard press.I want to run all methods after pressing enter. I am trying following but doesn't worked.

help me!

C#

namespace ConsoleApplication2
{
    class Program
    {
        string path = @"somepath";

        SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["SaiNathHospital"].ToString());

        public void getConsoleInput()
        {
            try
            {
                FileInfo fi = new FileInfo(path);

                for (int i = 0; i <= 0; i++)
                {
                    Console.WriteLine("");
                    using (StreamWriter sw = new StreamWriter(path))
                    {
                        sw.WriteLine(Console.ReadLine());
                        sw.Close();
                    }
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
        }

        public void getConsoleInputAtRuntime()
        {
 
        }

        public void ReadWriteIntoFile()
        {
            try
            {
                string filename = @"somepath";
                StringBuilder sb = new StringBuilder();

                StreamReader sr = new StreamReader(path);
                string s = sr.ReadLine();
                sr.Close();

                DataExport("Select * from PATIENT_TABLE where [BARCODE] = '" + s + "'", filename);
            }
            catch { }
        }

        public void DataExport(string SelectQuery, string filename)
        {
            try
            {
                using (var dt = new DataTable())
                {
                    using (var da = new SqlDataAdapter(SelectQuery, con))
                    {
                        da.Fill(dt);
                        var rows =
                            from dr in dt.Rows.Cast<DataRow>()
                            select String.Join(
                                ",",
                                from dc in dt.Columns.Cast<DataColumn>()
                                let t1 = Convert.IsDBNull(dr[dc]) ? "" : dr[dc].ToString()
                                let t2 = t1.Contains(",") ? String.Format("\"{0}\"", t1) : t1
                                select t2);

                        using (var sw = new StreamWriter(filename))
                        {
                            // sw.WriteLine(header);
                            foreach (var row in rows)
                            {
                                sw.WriteLine(row);
                            }
                            sw.Close();
                        }
                    }
                }
            }
            catch (Exception e) { Console.WriteLine(e.Message); }
        }

        public void WriteFileOutput()
        {
            string path = @"some path";
            if (File.Exists(path))
            {
                string[] lines = File.ReadAllLines(path);

                foreach (string line in lines)
                {
                    Console.WriteLine(line);
                }

            }
            Console.ReadLine();
        }

        public static void Main(string[] args)
        {
            Program p = new Program();
            p.timerfor();
            p.getConsoleInput();
         p.ReadWriteIntoFile();
            p.WriteFileOutput();
        }

 public void timerfor()
        {
            Timer t = new Timer(5000);
            t.Elapsed += OnTimedEvent;
          //  t.Interval = 5000;
            t.Start();
            t.Enabled = true;          
        }

        private static void OnTimedEvent(Object source, ElapsedEventArgs e)
        {
           // System.Windows.Forms.SendKeys.Send("{ENTER}");
            System.Windows.Forms.SendKeys.Send("~");
          //  System.Windows.Forms.SendKeys.SendWait("ENTER");
        }

Posted 18-May-15 0:11am

Member 11543226

Updated 18-May-15 1:57am

v3

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Comments

Andy Lanng 18-May-15 6:20am

All that the input pipe does is send a signal to your app.
You are asking for a way to, on a signal (timer) have the console send your app a signal.

What's the point? just use the timer as the signal

Member 11543226 18-May-15 6:22am

But in OnTimedEvent I have to press enter so that all Application does its task. I want Exactly the same way.

Andy Lanng 18-May-15 6:38am

Just call the same method. You cannot write to the input stream from within the application.

Sinisa Hajnal 18-May-15 7:12am

on timer, don't send Enter key (or any other), simply call the task that you would call on enter.

Member 11543226 18-May-15 6:46am

I didnt get your point sir?

Tomas Takac 18-May-15 6:54am

Use the reply button. Otherwise people don't get notifications and you will not get an answer.

Member 11543226 18-May-15 6:55am

sorry im new to this site . what can i do now it is not worked yet. I tried many examples.

Sinisa Hajnal 18-May-15 7:16am

In your application there is somewhere a method called on enter. It may be event handler or separate method you call from your keyevent. If it is not separate method, change the code so that it is. You call the method DoMyTask on enter and you also call DoMyTask on timer tick.

Member 11543226 18-May-15 7:31am

Thats exactly I want Sir, how to write code for enter method.

Florian Braun 18-May-15 7:48am

The big question for all of us is: what do you want to happen by pressing or simulating the "enter-key"? is there some code wich is executed when a real user presses the enter key? can you show us this code?

Member 11543226 18-May-15 8:00am

I have added code of what I want to run . I manually enter code and then all three methods run and shows output without pressing enter. currently when I press enter button all methods run . but this program is running on server automatically later on so I want method which press actual enter button.

John C Rayan 18-May-15 8:11am

Hi , what you have to do is schedule your program as a job if you want to run it from your server.

Florian Braun 18-May-15 8:13am

as far as i can see you are using Console.ReadLine on several places. which one exactly is the one you need enter to be pressed? (for example in your method "WriteFileOutput" it's just there to wait for someone to read your output and press enter. for a server you wouldn't need that one. Or is it when some code was entered (with the barcode-reader)?

Sinisa Hajnal 18-May-15 10:10am

Take the code you want to run on timer event. Put everything in a single method. Take care about potential exception. DO NOT put readlines or any other "human interraction" mechanism into it. Call it on timer tick.

Important note: this code will run only while your application is running. If you want it to run constantly, you should do it as windows service or at least scheduled job that calls your console (in which case you don't really need the timer, just run the code once, close the app, wait until your scheduler triggers the app again)

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Andy Lanng · Accepted Answer · 2015-05-18T02:40:00

Take a look:

C#

            static Timer _timer = new Timer(5000);
            public static void Main2(string[] args)
            {
                Program p = new Program();

                _timer.Elapsed += OnTimedEvent;
                
                // This thread will run in the background for the lifetime of the app.
                new Thread(() =>
                {
                    while (true)
                    {
                        //Any time enter is pressed it will set the _resetEvent & stop the timer
                        Console.ReadLine();
                        _resetEvent.Set();
                        _timer.Stop();
                    }
                }).Start();


                p.getConsoleInput();
                p.ReadWriteIntoFile();
                p.WriteFileOutput();
            }
            
            //This is a Manual Reset Event.  Look it up for details
            private static ManualResetEvent _resetEvent = new ManualResetEvent(false);

            // The timer can also set the _resetevent and stop itself from executing a second time (if that's what you want)
            private static void OnTimedEvent(Object source, ElapsedEventArgs e)
            {
                _resetEvent.Set();
                _timer.Stop();
            }

//...

            public void WriteFileOutput()
            {
                string path = @"some path";
                if (File.Exists(path))
                {
                    string[] lines = File.ReadAllLines(path);

                    foreach (string line in lines)
                    {
                        Console.WriteLine(line);
                    }

                }

                //I guess this is where u want to wait?
                //Reset the _resetEvent in case it is currently set
                _resetEvent.Reset();
                //Start the timer
                _timer.Start();
                //Wait for reset event to be set.
                _resetEvent.WaitOne();

                // The code will not continue past the wait until either the enter button is clicked or the timer event runs.

            }

If that is not what you need then please let me know

There are some advanced techniques in here. If you have any questions then post them as new ones so our friends in comments can pick up some points :)

Good luck ^_^