How can I...? - C# Discussion Boards

26-Apr-02 10:10

By definition you need a Web server in order to use localhost. Therefore, the answer is "no".

Cheers,
Tom Archer
Author, Inside C#

Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.

Re: How can I...?

Vlad Beu26-Apr-02 11:08

26-Apr-02 11:08

Thank you!

Re: How can I...?

Tom Archer26-Apr-02 11:15

26-Apr-02 11:15

You're welcome.

Cheers,
Tom Archer
Author, Inside C#

Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.

Is this a c# bug?

Vlad Beu26-Apr-02 9:47

26-Apr-02 9:47

Take a look at the following c# code and test it:

using System;
using System.IO;
using System.Net;
using System.Text;

namespace csharp_station.howto
{
///

/// Fetches a Web Page
///

class WebFetch
{
static void Main(string[] args)
{
byte[] buf = new byte[8192];

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http:\\www.csharp-station.com");
HttpWebResponse response = (HttpWebResponse)request.GetResponse();

Stream resStream = response.GetResponseStream();

int count = resStream.Read(buf, 0, buf.Length);

Console.WriteLine(Encoding.ASCII.GetString(buf, 0, buf.Length));

resStream.Close();
}
}
}

I expected that the output to be the entire content of Html page that i have requested , but unfortunetlly it returns only little pieces of the Html code.
I would be thankfull to anyone who helps me to fix this
problem

Poke tongue | ;-P

Re: Is this a c# bug?

Tom Archer26-Apr-02 10:14

26-Apr-02 10:14

I'm not sure I understand your problem. When I run it I get the 8k of info you requested. Confused | :confused:

Cheers,
Tom Archer
Author, Inside C#

Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.

For Tom Archer

Vlad Beu26-Apr-02 10:20

26-Apr-02 10:20

Please request 100k instead of 8K
and then look at the structure of that Html(it's chonk)
Thank you

Tom Archer26-Apr-02 10:43

26-Apr-02 10:43

Try this instead...

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http:\\www.csharp-station.com");
HttpWebResponse response = (HttpWebResponse)request.GetResponse();

Stream resStream = response.GetResponseStream();

byte[] buf = new byte[1000];
while (true)
{
  int bytesRead = resStream.Read(buf, 0, buf.Length);
  if (bytesRead == 0)
    break;

  Console.WriteLine(Encoding.ASCII.GetString(buf, 0, bytesRead));
}

resStream.Close();
Console.ReadLine();

Cheers,
Tom Archer
Author, Inside C#

Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.

Albert Pascual26-Apr-02 11:48

26-Apr-02 11:48

I don't have a compiler with me right now!

But I thought that was something like that inside the while loop

bytesRead = resStream.Read(buf, bytesRead, buf.Length-bytesRead);

Confused | :confused:

Tom Archer26-Apr-02 12:02

26-Apr-02 12:02

For standard file or memory streams you could determine the length of the stream and in a loop read until that many bytes are read. However, seek methods are not supported for the type of stream returned from GetResponseStream. I'm not saying my way is the only way, but when you do get to a compiler, I think you'll find it works Wink | ;)

Cheers,
Tom Archer
Author, Inside C#

Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.

Albert Pascual26-Apr-02 12:30

26-Apr-02 12:30

Thanks Tom,

My confusion is when the Read function is call the second time. Will you lose the info that was already in buf? or is going to attached it at the end of the buf instead of buf[0]?

Again, thanks!

Al

Tom Archer26-Apr-02 12:38

26-Apr-02 12:38

Albert Pascual wrote:
My confusion is when the Read function is call the second time. Will you lose the info that was already in buf? or is going to attached it at the end of the buf instead of buf[0]?

Yes, I'm writing into the same buf byte array each time through the loop. That's why the WriteLine is in the loop; to print the information on the screen before it gets overwritten with the next block of read data.

Albert Pascual wrote:
Again, thanks!

No problem Smile | :)

Cheers,
Tom Archer
Author, Inside C#

Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.

Albert Pascual26-Apr-02 12:44

26-Apr-02 12:44

My fault, my fault!

I always return the big buffer!!

what a mistake! I am sorry I actually didn't read past the Read() function!

My apologies for wasting your time

Al Blush | :O

Tom Archer26-Apr-02 12:51

26-Apr-02 12:51

No worries, mate Smile | :)

Cheers,
Tom Archer
Author, Inside C#

Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.

Re: Is this a c# bug?

Vlad Beu26-Apr-02 10:53

26-Apr-02 10:53

It works.Thanck you very much Tom!

Re: Is this a c# bug?

Tom Archer26-Apr-02 11:00

26-Apr-02 11:00

You're very welcome.

Cheers,
Tom Archer
Author, Inside C#

Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.

API wrapper in C#

HG26-Apr-02 8:32

26-Apr-02 8:32

Hi,

I'm having an issue wrapping a particular function from an API. The function looks like:

bool GetPacket(LPADAPTER ad, LPPACKET pack, bool s)

LPADAPTER and LPPACKET are pointers to structures. What I did in C#:

[DllImport("Packet.dll")]
internal extern static bool GetPacket (ref ADAPTER a, ref PACKET p, bool s);

I allways get false in return. I think its a problem with the pointer to structure, but I'm not sure. Any ideas???

The structures have both 4 fields (2 pointers (IntPtr) and 2 uints).

Thanks,

G

Re: API wrapper in C#

Albert Pascual26-Apr-02 8:58