Re: For Tom Archer - C# Discussion Boards

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

Vlad Beu

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

Vlad Beu

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

mouse disappears when typing into combobox

26-Apr-02 8:58

What's the declaration on Packet.dll for that function?
You always can add a breakpoint an debug unmanaged code!
Al

Re: API wrapper in C#

HG26-Apr-02 20:49

26-Apr-02 20:49

The declaration in the API dll is:
____________________________________________________________________
BOOLEAN PacketReceivePacket(LPADAPTER a, LPPACKET p, bool S);
// LPADAPTER is a pointer to an ADAPTER struct
// LPPACKET is a pointer to a PACKET struct
____________________________________________________________________
public struct ADAPTER{ IntPtr handle;
uint SymbolicLink;
uint NumWrites;
IntPtr ReadEvent;}
public struct PACKET{ IntPtr hEvent;
public IntPtr Buffer;
public uint Length;
public IntPtr Next;
public uint BytesReceived;
bool IoComplete;}
____________________________________________________________________
This is what i do in C#:
____________________________________________________________________
//initialize adapter and packet, etc. This works fine (functions return true)
//then:
bool b = false;
IntPtr pp = PacketAPI.PacketAllocatePacket();
PacketAPI.PACKET P =
(PacketAPI.PACKET)Marshal.PtrToStructure(pp,typeof(PacketAPI.PACKET));
byte [] BB = new byte[256000];
IntPtr ptBuf = Marshal.UnsafeAddrOfPinnedArrayElement(BB,0);
P.Buffer = Marshal.UnsafeAddrOfPinnedArrayElement(BB,0);
P.Length = 256000;
b = PacketAPI.PacketReceivePacket(ref A,ref P,false); //Always false
____________________________________________________________________

Thanks for your help,

G

temujin26-Apr-02 8:02

temujin

26-Apr-02 8:02

I am trying to implement a text editable, autocomplete combobox by deriving from ComboBox class and overiding OnKeyPress().
However I can't fix this bug, whenever text is typed into combobox, the mouse disappears, and doesn't show even when the mouse is moved. In fact, it's like the mouse is hiding behind the form window, because whenever it enters the form, the pointer disappears.

Anyone, please help, thanks...

lester

Similar to CHAR ( )

abdul26-Apr-02 2:25

abdul

26-Apr-02 2:25

This may sound very elementary to some. Please forgive me for the ****STUPID**** question.

In VB CHAR () returns the ASCII value. Is there anything similiar to CHAR( ) in c-sharp? Actually I would like test for STX and ETX in a string.

Thank you.

Confused | :confused:

[James Pullicino]26-Apr-02 2:31

[James Pullicino]

26-Apr-02 2:31

I know that in C++ a char IS the ASCII value.

(2b || !2b)

Nick Parker26-Apr-02 2:57

Nick Parker

26-Apr-02 2:57

I maybe way off here, and I bet James or someone else will set me straight on this, but here is my guess...

private string TheWord;
private int TheNumber;

TheWord = "Hello Abdul";
TheNumber = (int)TheWord;
MessageBox.Show(TheNumber.ToString());

HTH

Nick Parker

James T. Johnson26-Apr-02 7:39

James T. Johnson

26-Apr-02 7:39

What is STX and ETX? Are they strings you are looking for or a certain property?

You can get the character code by looking at the character stored in each character, which you can get by using the indexer on a string (string foo; foo[x]). Then you can convert that character to its unicode value.

string f = "foo";<br />
char c = f[0]; // c == 'f'<br />
short s = Convert.ToInt16(c); // s == 102

If memory serves correctly the ASCII set is a subset of Unicode, so an ASCII value will map to the same value in unicode.

HTH,

James

Simplicity Rules!