In my program I need to generate an instance of a class which is "Vehicle", the Vehicle class has a timer within it, along with a boolean "vExists", when the timer hits an interval.
class VehicalGen
{
private Random rn1 = new Random();
private int agrotime;
private bool vExists;
//static AgrivationHandler agroTimeHandler;
private static Timer agroTimer = new Timer(100);
//agrotime: anywhere between 2 and 4 seconds (2000 to 4000)
///Generates the new Vehicles using GetCarType to change the outcome of the later variables
public VehicalGen()
{
this.vtype = RandomGeneration.GetCarType(rn1);
switch (this.vtype)
{
[....] //This is where the details of the vehicle are generated.
}
this.agrotime = RandomGeneration.GetRandomTime224(rn1);
this.vExists = true;
this.serviced = false;
//agroTimeHandler = new AgrivationHandler(agrotime);
agroTimer.Interval = agrotime;
agroTimer.Elapsed += AgroTimerElapsed;
agroTimer.Start();
}
public static void AgroTimerElapsed(object sender, ElapsedEventArgs e)
{
//here is where I need to set vExists to "False"
}
}
However I need to generate a specific instance of the class as far as I'm aware to do that, because it doesn't like "this.vExists = false", it just errors.
Yes is possible.
Try the following:
private void LoadTimer()
Timer timer = new Timer
timer.Interval = 4000;
timer.Enabled = true;
timer.Tick += new EventHandler(timer1_Tick);
timer.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
// do your boolean operation where
}
Related
I am creating a game in visual studio using c sharp and want to add a pop up message saying 'game Over' once the timer reaches 0. Currently the countdown timer goes to negative seconds and the game keeps going. Currently attempt is below and any help is apricated.
public MainPage()
{
InitializeComponent();
_random = new Random(); // r is my random number generator
_countDown = 30;
SetUpMyTimers();// method for my timer
endGame();
}
private void endGame()
{
throw new NotImplementedException();
}
private void SetUpMyTimers() // calling my method
{
// start a timer to run a method every 1000ms
// that method is "TimerFunctions" that runs on the UI thread
Device.StartTimer(TimeSpan.FromMilliseconds(1000), () =>
{
Device.BeginInvokeOnMainThread(() =>
{ TimerFunctions(); });
return true;
});
}
private void TimerFunctions()
{
// change the countdown.
_countDown--;
LblCountdown.Text = _countDown.ToString();
}
The countdown is over to call the function.Use winform timer control to implement countdown function
public partial class Form1 : Form
{
TimeSpan Span = new TimeSpan(0, 0, 10);
public Form1()
{
InitializeComponent();
}
private void timer1_Tick(object sender, EventArgs e)
{
Span = Span.Subtract(new TimeSpan(0, 0, 1));
label1.Text = Span.Hours.ToString() + ":" + Span.Minutes.ToString() + ":" + Span.Seconds.ToString();//时间格式0：0：10
if (Span.TotalSeconds < 0.0)//when the countdown is over
{
timer1.Enabled = false;
MessageBox.Show("game over");
}
}
private void button1_Click(object sender, EventArgs e)
{
timer1.Interval = 1000;//Set every interval to 1 second
timer1.Enabled = true;
MessageBox.Show("End the game after 10s");
}
}
Test timer:
Hope it helps you.
You could try the following code.
<Grid>
<TextBlock Name="tbTime" />
</Grid>
Codebehind:
DispatcherTimer _timer;
TimeSpan _time;
public MainWindow()
{
InitializeComponent();
_time = TimeSpan.FromSeconds(10);
_timer = new DispatcherTimer(new TimeSpan(0, 0, 1), DispatcherPriority.Normal, delegate
{
tbTime.Text = _time.ToString("c");
if (_time == TimeSpan.Zero)
{
_timer.Stop();
MessageBox.Show("GameOver");
}
_time = _time.Add(TimeSpan.FromSeconds(-1));
}, Application.Current.Dispatcher);
_timer.Start();
}
The result:
I am trying automatic write data to textbox9. I am using timer, but I don't find why it's not working. Maybe somebody have suggest for me.
System.Timers.Timer aTimer;
public int i;
private void Form1_Load(object sender, EventArgs e)
{
i = 0;
aTimer = new System.Timers.Timer();
aTimer.Elapsed += new System.Timers.ElapsedEventHandler(OnTimeEvent);
aTimer.Interval = 2000;
aTimer.Enabled = true;
}
public void OnTimeEvent(object source, System.Timers.ElapsedEventArgs e)
{
i = i + 1;
textBox9.Text = i.ToString();
}
First, you need to move the "aTimer" and the "i" variables outside the methods at declare them at the form level. In the code you provided, those variables are not declared anywhere.
Second, the System.Timers.Timer will run outside the main thread, and it is not safe to access a control (textbox) from its events. So, you need to use the System.Windows.Forms.Timer, like so:
private System.Windows.Forms.Timer aTimer;
private int i = 0;
private void Form1_Load(object sender, EventArgs e)
{
i = 0;
aTimer = new System.Windows.Forms.Timer();
aTimer.Tick += ATimer_Tick;
aTimer.Interval = 2000;
aTimer.Enabled = true;
}
private void ATimer_Tick(object sender, EventArgs e)
{
i = i + 1;
textBox9.Text = i.ToString();
}
System.Timers.Timer by default calls its Elapsed in thread from a pool, different from main and attempt to change UI control from that thread should fire an exception.
You need to assign it SynchronizingObject:
aTimer.SynchronizingObject = this; // this = form
Or use System.Windows.Forms.Timer which is timer component designed for UI.
Here I have a chart (graph1) that normally should add a random point every 1second. but it doesn't... I tried to find out what the problem is but here I don't have anymore ideas...
The timer is started, label1 change every seconds but the chart doesn't change... with button one when I click it adds a new point.
what did I miss? please help... thanks a lot.
namespace Test_Chart1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
graph1.ChartAreas[0].AxisX.ScrollBar.Enabled = true;
graph1.ChartAreas[0].AxisX.IsLabelAutoFit = true;
graph1.ChartAreas[0].AxisX.ScaleView.Size = 40;
System.Timers.Timer _Timer1s = new System.Timers.Timer(1000); //object
_Timer1s.Elapsed += _Timer1sElapsed; //event in object
_Timer1s.Start(); //start counting
}
private void _Timer1sElapsed(object sender, EventArgs e)//Timer each 100ms
{
if (label1.BackColor == Color.Red)
{
label1.BackColor = Color.Blue;
PutValueInGraph1();
}
else label1.BackColor = Color.Red;
}
private void button1_Click(object sender, EventArgs e)
{
PutValueInGraph1();
}
private void PutValueInGraph1()
{
graph1.ChartAreas[0].AxisX.ScrollBar.Enabled = true;
graph1.ChartAreas[0].AxisX.IsLabelAutoFit = true;
graph1.ChartAreas[0].AxisX.ScaleView.Size = 100;
Random Rand_Value = new Random();
int ValueToAdd = Rand_Value.Next(1, 100);
listBox1.Items.Add(ValueToAdd.ToString());
graph1.Series["Data1"].Points.AddY(ValueToAdd);
if (graph1.ChartAreas[0].AxisX.Maximum-10 > graph1.ChartAreas[0].AxisX.ScaleView.Size)
{
graph1.ChartAreas[0].AxisX.ScaleView.Scroll(graph1.ChartAreas[0].AxisX.Maximum);
graph1.Series["Data1"].Points.RemoveAt(0);
}
}
}
}
ok here is the new one:
public partial class Form1 : Form
{
static System.Windows.Forms.Timer myTimer = new System.Windows.Forms.Timer();
public Form1()
{
InitializeComponent();
myTimer.Tick += new EventHandler(TimerEventProcessor);
myTimer.Interval = 1;
}
private void TimerEventProcessor(Object myObject, EventArgs myEventArgs)
{
Random Rand_Value = new Random();
int ValueToAdd = Rand_Value.Next(1, 100);
listBox1.Items.Add(ValueToAdd.ToString());
graph1.Series["Data1"].Points.AddY(ValueToAdd);
if (graph1.ChartAreas[0].AxisX.Maximum - 10 > graph1.ChartAreas[0].AxisX.ScaleView.Size)
{
graph1.ChartAreas[0].AxisX.ScaleView.Scroll(graph1.ChartAreas[0].AxisX.Maximum);
graph1.Series["Data1"].Points.RemoveAt(0);
}
}
private void btn_Start_Click_1(object sender, EventArgs e)
{
graph1.ChartAreas[0].AxisX.ScrollBar.Enabled = true;
graph1.ChartAreas[0].AxisX.IsLabelAutoFit = true;
graph1.ChartAreas[0].AxisX.ScaleView.Size = 100;
myTimer.Start();
BlinkLed.BackColor = Color.YellowGreen;
}
private void btn_Stop_Click(object sender, EventArgs e)
{
myTimer.Stop();
BlinkLed.BackColor = Color.AliceBlue;
}
}
Do you think it's better?
What about the changing thread?
If I had a button:
private void PutValueInGraph1()
{
Random Rand_Value = new Random();
int ValueToAdd = Rand_Value.Next(1, 100);
listBox1.Items.Add(ValueToAdd.ToString());
graph1.Series["Data1"].Points.AddY(ValueToAdd);
if (graph1.ChartAreas[0].AxisX.Maximum-10 > graph1.ChartAreas[0].AxisX.ScaleView.Size)
{
graph1.ChartAreas[0].AxisX.ScaleView.Scroll(graph1.ChartAreas[0].AxisX.Maximum);
graph1.Series["Data1"].Points.RemoveAt(0);
}
}
private void button1_Click(object sender, EventArgs e)
{//try to raise exception
PutValueInGraph1();
}
and I change the event like this:
private void TimerEventProcessor(Object myObject, EventArgs myEventArgs)
{//try to raise exception
PutValueInGraph1();
}
The data input accelerate when I'm started the timer and I click all the time on the button1.
Why is there no exception as tom_imk said??
because we can access the same function at the same time....?
Thanks for your answers.
I tried below sample code and it is working fine for me.
public Form7()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
chart1.ChartAreas[0].AxisX.Maximum = 100;
chart1.ChartAreas[0].AxisX.Minimum = 0;
chart1.ChartAreas[0].AxisX.Interval = 1;
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
Random Rand_Value = new Random();
int ValueToAdd = Rand_Value.Next(1, 100);
chart1.Series[0].Points.AddY(ValueToAdd);
}
I'm surprised you didn't get an exception. You are manipulating UI elements outside the UI thread, something you musn't do, ever.
Refer to the answer in this question:
How to update the GUI from another thread in C#?
EDIT:
To make clear why the timerelapsed method does not run on the UI thread: It's simply the wrong class that is used here. So the easy solution would be to not created a System.Timers.Timer in the Form-constructor but to drop a timer on the form in the form designer and use that instead. The solution by sowjanya attaluri should be marked as the correct answer.
basically I'm trying to implement the timer in class for my would-be very first game in C#; I want to use timers that will constantly update the player and provide certain periodic feedback, but I can't seem to get the 'timer' class to work correctly. If I use it in a loop (as shown below), it will wait 2 seconds, and then keep writing "You're Alive!" to the console with 0 delay in-between; and if I do not use the loop, the application just ends instantly.
using System;
using System.Timers;
public class MyClass
{
public static void myTimer_Elapsed(object sender, ElapsedEventArgs e)
{
Console.WriteLine("You're alive!");
}
public static void Main(String[] args)
{
while (true)
{
Timer MyTimer = new Timer();
MyTimer.Interval = 2000;
MyTimer.Enabled = true;
MyTimer.Elapsed += new ElapsedEventHandler(myTimer_Elapsed);
MyTimer.Start();
}
}
Just add below line after MyTimer.Start();
Console.ReadLine();
static void Main(String[] args)
{
Timer MyTimer = new Timer();
MyTimer.Interval = 2000;
MyTimer.Enabled = true;
MyTimer.Elapsed += new ElapsedEventHandler(myTimer_Elapsed);
MyTimer.Start();
Console.ReadLine();
}
private static void myTimer_Elapsed(object sender, ElapsedEventArgs e)
{
Console.WriteLine("You're alive!");
}
I have four buttons that are called "ship1,ship2" etc.
I want them to move to the right side of the form (at the same speed and starting at the same time), and every time I click in one "ship", all the ships should stop.
I know that I need to use a timer (I have the code written that uses threading, but it gives me troubles when stopping the ships.) I don't know how to use timers.
I tried to read the timer info in MDSN but I didn't understand it.
So u can help me?
HERES the code using threading.
I don't want to use it. I need to use a TIMER! (I posted it here because it doesnt give me to post without any code
private bool flag = false;
Thread thr;
public Form1()
{
InitializeComponent();
}
private void button2_Click(object sender, EventArgs e)
{
flag = false;
thr = new Thread(Go);
thr.Start();
}
private delegate void moveBd(Button btn);
void moveButton(Button btn)
{
int x = btn.Location.X;
int y = btn.Location.Y;
btn.Location = new Point(x + 1, y);
}
private void Go()
{
while (((ship1.Location.X + ship1.Size.Width) < this.Size.Width)&&(flag==false))
{
Invoke(new moveBd(moveButton), ship1);
Thread.Sleep(10);
}
MessageBox.Show("U LOOSE");
}
private void button1_Click(object sender, EventArgs e)
{
flag = true;
}
Have you googled Windows.Forms.Timer?
You can start a timer via:
Timer timer = new Timer();
timer.Interval = 1000; //one second
timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);
timer.Enabled = true;
timer.Start();
You'll need an event handler to handle the Elapsed event which is where you'll put the code to handle moving the 'Button':
private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
MoveButton();
}