[Q] How to define an array of IPAddress-es

[Stuart Norris]

Dear Readers,

I am attempting to define an array of IPAddress-es in C#.

I wish to have a array of address so I can try in order to connect to
them in a loop to handle unavailable hosts.

Todate since I do not know how to define an array of IPAddress-es. I
have been defining variable like:

IPAddress ipAddress1 = IPAddress.Parse ( "10.1.1.1" );
IPAddress ipAddress2 = IPAddress.Parse ( "11.1.1.1" );

Then define the end point using the hard coded name.

IPEndPoint remoteServerEnd Point = new IPEndPoint( ipAddress1, port );
How do I declare an array of IPAddress-es so I can loop around them
using an index counter?

I thought I could do IPAddress[] ipAddress = new IPAddress[2];

and then use ipAddress[0] = IPAddress.Parse ( "10.1.1.1" );

This did not work.

What is the correct way to define an array of IPAdresses-es?

Thanks

Stuart

[Nick Malik]

Does this create a new IPAddress object? (I've never used this object
before...)

IPAddress ipAddress1 = IPAddress.Parse ( "10.1.1.1" );
If so, then I don't see why this would have failed: ipAddress[0] = IPAddress.Parse ( "10.1.1.1" );
Regardless, you can just as easily create an ArrayList.

ArrayList alist = new ArrayList();
alist.Add(IPAdd ress.Parse("10. 2.3.4"));

foreach (IPAddress myIP in alist)
{
// do something with myIP
}

In fact, you could just as easily store an array of IPEndpoint objects in
the ArrayList.

I haven't used any of these objects before, and am not aware of the
sideeffects of using them, or resources that may be allocated. My advice
may be off-base if these are expensive critters.

Good luck,
--- Nick

"Stuart Norris" <st**********@y ahoo.com.au> wrote in message
news:51******** *************** **@posting.goog le.com... Dear Readers,

I am attempting to define an array of IPAddress-es in C#.

I wish to have a array of address so I can try in order to connect to
them in a loop to handle unavailable hosts.

Todate since I do not know how to define an array of IPAddress-es. I
have been defining variable like:

IPAddress ipAddress1 = IPAddress.Parse ( "10.1.1.1" );
IPAddress ipAddress2 = IPAddress.Parse ( "11.1.1.1" );

Then define the end point using the hard coded name.

IPEndPoint remoteServerEnd Point = new IPEndPoint( ipAddress1, port );
How do I declare an array of IPAddress-es so I can loop around them
using an index counter?

I thought I could do IPAddress[] ipAddress = new IPAddress[2];

and then use ipAddress[0] = IPAddress.Parse ( "10.1.1.1" );

This did not work.

What is the correct way to define an array of IPAdresses-es?

Thanks

Stuart

[Jon Skeet [C# MVP]]

Stuart Norris <st**********@y ahoo.com.au> wrote:

<snip>

How do I declare an array of IPAddress-es so I can loop around them
using an index counter?

I thought I could do IPAddress[] ipAddress = new IPAddress[2];
and then use ipAddress[0] = IPAddress.Parse ( "10.1.1.1" );
You can.
This did not work.

It should have done. Could you post a short but complete program which
demonstrates the problem?

See http://www.pobox.com/~skeet/csharp/complete.html for details of
what I mean by that.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[William Stacey [MVP]]

private void button48_Click( object sender, System.EventArg s e)
{
IPAddress[] ips = new IPAddress[5];
string tempIP = "192.168.0. ";
for(int i = 0; i < 5; i++)
{
ips[i] = IPAddress.Parse (tempIP + (i + 1));
}
foreach(IPAddre ss ip in ips)
{
Console.WriteLi ne("IP:"+ip.ToS tring());
}
}

--
William Stacey, MVP

"Stuart Norris" <st**********@y ahoo.com.au> wrote in message
news:51******** *************** **@posting.goog le.com...

Dear Readers,

I am attempting to define an array of IPAddress-es in C#.

I wish to have a array of address so I can try in order to connect to
them in a loop to handle unavailable hosts.

Todate since I do not know how to define an array of IPAddress-es. I
have been defining variable like:

IPAddress ipAddress1 = IPAddress.Parse ( "10.1.1.1" );
IPAddress ipAddress2 = IPAddress.Parse ( "11.1.1.1" );

Then define the end point using the hard coded name.

IPEndPoint remoteServerEnd Point = new IPEndPoint( ipAddress1, port );
How do I declare an array of IPAddress-es so I can loop around them
using an index counter?

I thought I could do IPAddress[] ipAddress = new IPAddress[2];

and then use ipAddress[0] = IPAddress.Parse ( "10.1.1.1" );

This did not work.

What is the correct way to define an array of IPAdresses-es?

Thanks

Stuart

[Justin Rogers]

For perf it also takes a long...

ips[i] = new IPAddress(byte1 << 24 + byte2 << 16 + byte3 << 8 + byte4);

In a loop, you just increment byte4...
I know, just give me the pleasure of pointing out perf wins. Thats all I get
from this newsgroup ;-) PS, quit storing string IPs in SQL too ;-)
--
Justin Rogers
DigiTec Web Consultants, LLC.
Blog: http://weblogs.asp.net/justin_rogers
"William Stacey [MVP]" <st***********@ mvps.org> wrote in message
news:OQ******** ********@TK2MSF TNGP10.phx.gbl. ..

private void button48_Click( object sender, System.EventArg s e)
{
IPAddress[] ips = new IPAddress[5];
string tempIP = "192.168.0. ";
for(int i = 0; i < 5; i++)
{
ips[i] = IPAddress.Parse (tempIP + (i + 1));
}
foreach(IPAddre ss ip in ips)
{
Console.WriteLi ne("IP:"+ip.ToS tring());
}
}

--
William Stacey, MVP

"Stuart Norris" <st**********@y ahoo.com.au> wrote in message
news:51******** *************** **@posting.goog le.com...

Dear Readers,

I am attempting to define an array of IPAddress-es in C#.

I wish to have a array of address so I can try in order to connect to
them in a loop to handle unavailable hosts.

Todate since I do not know how to define an array of IPAddress-es. I
have been defining variable like:

IPAddress ipAddress1 = IPAddress.Parse ( "10.1.1.1" );
IPAddress ipAddress2 = IPAddress.Parse ( "11.1.1.1" );

Then define the end point using the hard coded name.

IPEndPoint remoteServerEnd Point = new IPEndPoint( ipAddress1, port );
How do I declare an array of IPAddress-es so I can loop around them
using an index counter?

I thought I could do IPAddress[] ipAddress = new IPAddress[2];

and then use ipAddress[0] = IPAddress.Parse ( "10.1.1.1" );

This did not work.

What is the correct way to define an array of IPAdresses-es?

Thanks

Stuart

[William Stacey [MVP]]

yep. You can also do this if you happen to have the byte[] around:

uint ipnum = BitConverter.To UInt32(ba, 0);
ipAddress = new IPAddress(ipnum );

The IPAddress byte[] constructor does not seem to work or I am using it
wrong.

--
William Stacey, MVP

"Justin Rogers" <Ju****@games4d otnet.com> wrote in message
news:#u******** ******@TK2MSFTN GP09.phx.gbl...

For perf it also takes a long...

ips[i] = new IPAddress(byte1 << 24 + byte2 << 16 + byte3 << 8 + byte4);

In a loop, you just increment byte4...
I know, just give me the pleasure of pointing out perf wins. Thats all I get from this newsgroup ;-) PS, quit storing string IPs in SQL too ;-)
--
Justin Rogers
DigiTec Web Consultants, LLC.
Blog: http://weblogs.asp.net/justin_rogers
"William Stacey [MVP]" <st***********@ mvps.org> wrote in message
news:OQ******** ********@TK2MSF TNGP10.phx.gbl. ..

private void button48_Click( object sender, System.EventArg s e)
{
IPAddress[] ips = new IPAddress[5];
string tempIP = "192.168.0. ";
for(int i = 0; i < 5; i++)
{
ips[i] = IPAddress.Parse (tempIP + (i + 1));
}
foreach(IPAddre ss ip in ips)
{
Console.WriteLi ne("IP:"+ip.ToS tring());
}
}

--
William Stacey, MVP

"Stuart Norris" <st**********@y ahoo.com.au> wrote in message
news:51******** *************** **@posting.goog le.com...

Dear Readers,

I am attempting to define an array of IPAddress-es in C#.

I wish to have a array of address so I can try in order to connect to
them in a loop to handle unavailable hosts.

Todate since I do not know how to define an array of IPAddress-es. I
have been defining variable like:

IPAddress ipAddress1 = IPAddress.Parse ( "10.1.1.1" );
IPAddress ipAddress2 = IPAddress.Parse ( "11.1.1.1" );

Then define the end point using the hard coded name.

IPEndPoint remoteServerEnd Point = new IPEndPoint( ipAddress1, port );
How do I declare an array of IPAddress-es so I can loop around them
using an index counter?

I thought I could do IPAddress[] ipAddress = new IPAddress[2];

and then use ipAddress[0] = IPAddress.Parse ( "10.1.1.1" );

This did not work.

What is the correct way to define an array of IPAdresses-es?

Thanks

Stuart