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How to PING Server in C#

By , 18 Sep 2010
 
It is always better to ping a server before actually calling the server from your client application. The Ping service will try to post a dummy request to the server which is used to be very small and tries to get the Response from the server. Generally if the server response is available, the server sends the response immediately.
 
Hence you can save a considerable amount of time building the Request body. You also never need to wait for so long time for Timeouts.
 
To Ping a Server, you can use:
 
public static bool IsConnectedToInternet
{
    get
    {
        Uri url = new Uri("www.abhisheksur.com");
        string pingurl = string.Format("{0}", url.Host);
        string host = pingurl;
        bool result = false;
        Ping p = new Ping();
        try
        {
            PingReply reply = p.Send(host, 3000);
            if (reply.Status == IPStatus.Success)
                return true;
        }
        catch { }
        return result;
    }
}
 
The PING sends an ICMP (Internet Control Message Protocol) echo request to the server and waits to receive the echo back. If the value of Status is success, the PingReply is successful.

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QuestionMany servers block ping response for securitymemberwilson mar23 Jan '13 - 2:43 
Note that more and more servers are set to not respond to ping requests to remove a way for hackers to map a network. So if the ping fails, the server may still be reachable by the app using HTTP.
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Generalhi how to change code if no ping exit app on start, thankyo...memberMember 806616025 Feb '12 - 13:10 
hi
how to change code if no ping exit app on start,
thankyou
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GeneralReason for my vote of 5 Good one abhishekmvpthatraja29 Oct '10 - 21:10 
Reason for my vote of 5
Good one abhishek
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GeneralSome optimizations...memberSilic0re0913 Sep '10 - 11:22 
Uri url = new Uri("www.abhisheksur.com");
string pingurl = string.Format("{0}", url.Host);
string host = pingurl;
 
Those three lines do a lot of back-and-forth conversions, why not just use the host="www.abhisheksur.com" instead of creating a URI, creating a pingurl, and then creating a host?
 
It could be simplified to:
        string host = "www.abhisheksur.com";
        bool result = false;
        Ping p = new Ping();
        try
        {
            PingReply reply = p.Send(host, 3000);
            if (reply.Status == IPStatus.Success)
                return true;
        }
        catch { }
        return result;   //This is never anything but false, so why not just return false?
 
You're code works just fine for pinging a particular IP (www.abhisheksur.com), but really shouldn't be used to determine if the internet is available. What happens when that particular site is down, or gets turned off?
 
A better way to determine if the internet is available is to use interop:
 
using System;
using System.Runtime;
using System.Runtime.InteropServices;
 
public static class InternetConnectionStatus
{
    [DllImport("wininet.dll")]
    private extern static bool InternetGetConnectedState(out int Description, int Reserved);
 
    public static bool Connected()
    {
        int Descript;
        return InternetGetConnectedState(out Descript, 0);
    }
}
 
Which would be used like:
 
    bool connected = InternetConnectionStatus.Connected();

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GeneralRe: Some optimizations...mvpAbhishek Sur13 Sep '10 - 12:14 
Yes actually I have done this to get only the host form a link. The example was not good enough but if the link
 
www.abhisheksur.com/forum.aspx
 
The ping server then should point to only the host, not the entire link. I used it for just that.
 
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About Article
Type Tip/Trick
Licence CPOL
First Posted 13 Sep 2010
Views 95,596
Bookmarked 9 times
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