Change Interval time of System.Windows.Forms.Timer

Robert Schwer

6y2.3kLearn iOS Programming

Hello,

is it possible to change the Timer.Interval time after start of the timer.

I do this al follows:

int iTimerNewIntervalTime = 400;

Timer.Stop();

Timer.Interval = iTimerNewIntervalTime;

Timer.Start();

It would be wrong to say nothig happens.

It is so that the timer no longer triggers a tick event.

Can someone tell me why that is.

And how can I change the time during the runtime?

Thanks a lot.

5 Replies

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Sachin Singh5y ago
by calling Stop will cause the Timer to restart the interrupted interval. If your Timer is set for a 5000-millisecond interval, and you call Stop at around 3000 milliseconds, calling Start will cause the Timer to wait 5000 milliseconds before raising the Tick event.
+1
Rajanikant Hawaldar5y ago
Hey Robert, can you please post your sample code not part of code. please check this below sample code its works for me.
using System;
using System.Windows.Forms;
namespace LoadEnumIntoComboBox
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        System.Windows.Forms.Timer t = new System.Windows.Forms.Timer();
        private void Form1_Load(object sender, EventArgs e)
        {
            t.Interval = 100;
            t.Tick += T_Tick;
            t.Start();
        }
        int i = 0;
        private void T_Tick(object sender, EventArgs e)
        {
            //t.Interval = 5000;
            textBox1.Text = i.ToString();
            i++;
        }
//Added button to stop, set new interval and start timer
        private void Reset_Click(object sender, EventArgs e)
        {
            t.Stop();
            t.Interval = 5000;
            t.Start();
        }
    }
}
+1
Robert Schwer5y ago
Hello together,
the timer is already initialized.
Also the timer is working as well.

Now a situation is given that demands a shorter or longer interval time.

Now my question:
Is it possible to change the timer interval time?

Following is done:
Timer stopp.
Timer interval get a new interval time value.
Timer start.
Timer.Stop();

Timer.Interval = iTimerNewIntervalTime;

Timer.Start();
After this process the timer is working anymore.
The timer can no longer be started.
Do You know what happens in this situation.

Thanks a lot.
+1
Rajanikant Hawaldar6y ago
Below works,
public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        System.Windows.Forms.Timer t = new System.Windows.Forms.Timer();

        private void Form1_Load(object sender, EventArgs e)
        {
            t.Interval = 500;
            t.Tick += T_Tick;
            t.Start();

        }
        int i = 0;
        private void T_Tick(object sender, EventArgs e)
        {
            t.Interval = 5000;
            textBox1.Text = i.ToString();
            i++;
        }
    }
+2
Amit Gupta6y ago
The way you change the interval of a timer seems good. To invoke the tick event you need to create an event either from the design view or code behind

Just to keep in mind that the interval is in millisecond

1. Design view

-> Click on the timer control that you had dragged onto the form -> goto properties -> click the event tab -> double click on the tick event

private void timer1_Tick(object sender, EventArgs e)

{

//do your stuff in that event

}

+1