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see my previous response for further details as i was testing it by changing the hosts file locally.
the client recognizes that the server has gone down - the following event is raised by it:
hubConnection.Error
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Clients don't do a DNS lookup on every request. They do it one and cache the result. If the server goes down and someone changes the IP the DNS name points to, the clients are going to have to clear their DNS cache and do another lookup of the name to get the new IP.
As already has been said, DNS changes take time to propagate, so if the server goes down and the clients detect it, they MAY still get the old IP address for the DNS name they have. Changing the IP address in DNS is NOT the normal way to do failover.
If reliability is that important, Google for "IIS Failover Cluster" and start reading. This is far more complicated that just changing an IP address in DNS.
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i wonder if the signalR client works this way.
i made a test locally - created an entry in the host file:
127.0.0.1 testaddress
both the client and the server are configured to use "testaddress" as host name. when it runs, all is working well, then i change the entry to another ip address:
127.0.0.3 testaddress
as expected - all is working well as the connection is still intact.
now if i stop the server,wait a few seconds, then change the entry back to:
127.0.0.1 testaddress
and restart the server - the connection never re-establishes - client generates errors and finally closes.
these are the events raised in this scenario:
hubConnection.Error - happens about 10 times
hubConnection.Closed
if i do the same scenario without changing the host name record (stopping the server, waiting a few seconds and restarting it), it returns to working well even if i wait a longer time - these are the events raised from the client in this case:
hubConnection.Error - happens a few times until i start the server again and then
hubConnection.Reconnecting
hubConnection.Reconnected
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Yeah, that doesn't replicate what happens with an actual DNS entry.
It's not the SignalR client that handles the resolution and caching of the IP address from the host name. It's the TCP/IP stack that does it.
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i cant seem to get my array to work,i am creating the gae hammurabi, and each button click creates a number for an amount of people starved, what im trying to do is save the data each year into its own index so that at the end of 10 years i could display each years starved aswell as the average ie.
year 1 = 0 starved
years 2 =3 people starved
etc
this is the code for the array i have so far which doesnt work
int[] starved = new int[10];
int average, sum = 0;
for (int i = 0; i<10; i++)
{
sum = sum + starved[i];
}
if (year == 11)
{
average = sum / 10;
label11.Text = average + " people died on average each year";
}
this is the whole code for the game
// variables int year = 1; int arrivals = 0; int popu - Pastebin.com[^]
any help would be appreciated
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You are initialising your array but, in your code snippet there, you don't actually save any data into your array. In year 2, for instance, you don't have a corresponding
starved[1] = 3;
This space for rent
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so i need to add
starved[0] =
starved[1] =
etc? if so what do i add after = each one? the value i need snt calculated until after the user as entered the info and clicked the button
thanks for the reply
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So read the values from the user in a loop (Prompt him for each year's data), convert it to an integer:
string numberAsString = "12345";
int numberAsInteger;
if (!int.TryParse(numberAsString, out numberAsInteger))
{
Console.WriteLine("{0} is not a number!", numberAsString);
}
else
{
starved[i++] = numberAsInteger;
}
Sent from my Amstrad PC 1640
Never throw anything away, Griff
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
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the original game doesnt ask you to input years or anything like that so i should need to either
also i need to use the values from each year to enter into a chart
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So where does that information come from then?
.
Remember that we can't see your screen, access your HDD, or read your mind - we only get exactly what you type to work with. Anything you don't tell us, we don't know ...
Sent from my Amstrad PC 1640
Never throw anything away, Griff
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
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Member 14139197 wrote: the original game doesnt ask you to input years or anything like that so i should need to either
From what I remember, the game uses random numbers for these values. That's the solution for you - use a random number.
This space for rent
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hi, i need to display the y values of user given x axis values, i don't know how to write a code for this
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Nor do we, since we have no idea of the relationship of y to x. Nor do we have any idea where you want to display these values. Please edit your question and add some proper details of your problem.
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If you're still using the chart, then you are already providing an y for every x.
Bastard Programmer from Hell 
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.
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You could try this little snippet in a button click event handler to see if it works.
You must use a valid "X" value and it must be a double data type.If "X" is not valid it will give an exception.
DataPoint myDatapoint;
Double myXvalue ;
myDatapoint=chart1.Series[0].Points.FindByValue(myXvalue, "X");
MessageBox.Show(myDatapoint.YValues[0].ToString());
modified 4-Feb-19 12:40pm.
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Y values usually go along the "Y Axis".
You could start looking under: Chart - Y Axis.
"(I) am amazed to see myself here rather than there ... now rather than then".
― Blaise Pascal
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i use the one timer in program i set 100ms intravel for that timer.every 100ms i need to increment the values and plot in chart.now my problem is the timer is got slowed when iam using the chart in my application without chart the working of timer is fine.
this is my code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace chart
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
double a,b = 0;
private void Form1_Load(object sender, EventArgs e)
{
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
a = a + 1;
b = b + 3;
timervaluee.Text=a.ToString();
chart1.Series[0].Points.AddXY(a, b);
}
}
}
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Mohamed Fahad wrote: chart1.Series[0].Points.AddXY(a, b);
It adds a Point to a collection every 100 ms, until the list is so large it slows down the entire application. If it could keep up with allocating new memory, you would eventually run out of it.
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.
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i don't know how to do that there is any example for that
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It is a logical problem; as long as the series keeps growing, the more time it requires to organize it internally and to draw it.
Have you considered removing the first point whenever adding a new one?
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.
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May make the situation worse: List<T> - Is it really as efficient as you probably think?[^] - removing the head item requires moving all the others every time.
If the chart draw time starts to exceed the timer Tick interval you're going to have problems regardless.
Sent from my Amstrad PC 1640
Never throw anything away, Griff
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
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OriginalGriff wrote: If the chart draw time starts to exceed the timer Tick interval you're going to have problems regardless.
Could easily be handled by looking if painting happened, and if still busy, skip updating.
Still, if it needs to move, I'd prefer drawing it myself instead of using a chart 
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.
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I'd agree - Chart is a bit of a sledgehammer, when you need a crosshead screwdriver. 
Sent from my Amstrad PC 1640
Never throw anything away, Griff
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
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How much did it "got slowed"?
Thread switching incurs overhead.
A timer will never go off on time unless it could predict the future.
Have you measured the length of the intervals in relation to when the timer fires?
What is the relationship between the number of ticks it takes the timer handler to execute versus the duration of the subsequent interval?
Or is there none?
"(I) am amazed to see myself here rather than there ... now rather than then".
― Blaise Pascal
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Can I use Clang in C# project to find all function calls and their argument from input text that was written in C++. how can I do that. The steps please
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