Re: .Count, not in namespace system. - C# Discussion Boards

6-Jun-07 22:35

In a previous post I was informed that I could count the number of elements in an array using.

// elements is a previously declared array

elements.Count

however .Count isnt available

I looked it up in the object viewer and it looks like its a part of the system namespace which I have included in my code.

Anyone know why it might not be showing up?

and also if

elements.Count

and

elements.Length

return the same value?

Brady Kelly6-Jun-07 23:08

Brady Kelly

6-Jun-07 23:08

How can a property be part of the System namespace? Elements.Count won't ever return anything, so do yourself a favour and use the property that does exist, elements.Length

jblouir7-Jun-07 1:22

7-Jun-07 1:22

Forgive me if I am wrong but dont all the different classes such as array and int etc come from namespaces? Then .Count is derived from array which is part of system, ok so its a property, but if you dont have proper namespace it wont be there.

Brady Kelly7-Jun-07 3:01

Brady Kelly

7-Jun-07 3:01

Count is a property, it isn't found in a namespace but on a class, and the class will be found in a namespace.

Colin Angus Mackay6-Jun-07 23:09

Colin Angus Mackay

6-Jun-07 23:09

It is an array then use Length. If it any other type of collection then use Count.

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DavidNohejl6-Jun-07 23:15

DavidNohejl

6-Jun-07 23:15

Colin Angus Mackay wrote:
It is an array then use Length. If it any other type of collection then use Count

Kinda sucks there is this "inconsistency". Yes, sure, logicaly array has lenght not count and collection doesn't have lenght but count, but... What about NumberOfElements or something for both.

"Throughout human history, we have been dependent on machines to survive. Fate, it seems, is not without a sense of irony. " - Morpheus
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jblouir6-Jun-07 23:23

6-Jun-07 23:23

Well I was unstructed to use this...

string [] elements = line.split(new char [] { ',' } );

if (elements.Count > 0)
{
int n;

elements is an array, when .Count didnt work I assumed it was because I missing a using namespace

.Length appears to work but im still stuck with trying to add an object to a global object array.

intIndex, strRoom,strDesc,strLook, i are all variables, descriptor being the object name

RoomData descriptor = new RoomData(intIndex, strRoom, strDesc, strLook);
GlobalVars.arrRoomData.SetValue(descriptor,i)

i++;

DavidNohejl6-Jun-07 23:27

DavidNohejl

6-Jun-07 23:27

jblouir wrote:
but im still stuck with trying to add an object to a global object array.

What is the problem? If fixed lenght of array is problem, use collection.

Colin Angus Mackay6-Jun-07 23:28

Colin Angus Mackay

6-Jun-07 23:28

jblouir wrote:
im still stuck with trying to add an object to a global object array

You can't add objects to an array - They have a fixed length.

You may wish to try an ArrayList.

Also, global variables are rarely justified in an object oriented language. You may wish to have a rethink about your design.

jblouir7-Jun-07 1:14

7-Jun-07 1:14

Well I have a game loop in void Main, and I have a few methods, one being initialise which sits in the loop that repeats until input = exit.

the loop needs the input variable

and initialise needs the input variable

they need to be the same, and the best way I found of doing that is using a global variable.

I have been literally programming in C# for less than a week, I am doing things that work and learning as I go, if there is a better way to do it then I implement the new method.

I had thought that I could make a method that would return input but couldnt work it out at the time.

// Edit

And yes, the internet is my only resource at the moment, when I get the money to spend ill buy a book on C#.

Luc Pattyn6-Jun-07 23:39

Luc Pattyn

6-Jun-07 23:39

Hi,

some remarks on your code:

jblouir wrote:
string [] elements = line.split(new char [] { ',' } );

can be simplified to
string [] elements = line.Split(',');
because of the params keyword in one of the Split overloads

jblouir wrote:
if (elements.Count > 0)

I see no way elements.Count could be zero; if no comma's are present, everything
will be returned as the first and only string in elements[].

Smile | :)

Luc Pattyn

[My Articles] [Forum Guidelines]

Christian Graus6-Jun-07 23:54

Christian Graus

6-Jun-07 23:54

Luc Pattyn wrote:
string [] elements = line.Split(',');

He's trying to use code that I wrote off the cuff in an earlier answer. I have found that the above doesn't work for me, I must be doing something wrong.

Luc Pattyn wrote:
I see no way elements.Count could be zero;

Good point, I was trying to illustrate the need to code defensively, and not assume an array length, but in this case, you're right.

Christian Graus - Microsoft MVP - C++
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CRC Modbus

pmartike6-Jun-07 22:11

pmartike

6-Jun-07 22:11

Can anybody help me to make a working CRC Modbus calculation application??

Confused | :confused:

http://pmartike.deviantart.com/

Re: CRC Modbus

Sathesh Sakthivel6-Jun-07 22:14

Launching C# app through local network

6-Jun-07 22:14

The Article by Marcel de Wijs CRC Encoding[^] here in CP will Help You.

Regards,

Satips. Rose | [Rose]

Re: CRC Modbus

pmartike6-Jun-07 23:15

pmartike

6-Jun-07 23:15

ok, but that code not working....

i found a working code, here is:

static ushort[] CRCTable ={<br />
0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,<br />
0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,<br />
0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,<br />
0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,<br />
0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,<br />
0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,<br />
0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,<br />
0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,<br />
0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,<br />
0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,<br />
0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,<br />
0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,<br />
0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,<br />
0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,<br />
0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,<br />
0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,<br />
0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,<br />
0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,<br />
0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,<br />
0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,<br />
0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,<br />
0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,<br />
0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,<br />
0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,<br />
0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,<br />
0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,<br />
0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,<br />
0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,<br />
0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,<br />
0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,<br />
0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,<br />
0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040<br />
            };<br />
<br />
ushort ModbusCRC16(byte [] s)<br />
{<br />
  byte b;<br />
  int i;<br />
  ushort result = 0xFFFF;<br />
  for (i=0;i<s.Length;i++)<br />
  {<br />
    b = (byte)(s[i] ^ result);<br />
    result = (ushort)(result >> 8 ^ CRCTable[b]);<br />
  }<br />
  return (result);<br />
}

Bye!

http://pmartike.deviantart.com/

sgeorgije6-Jun-07 21:31

sgeorgije

6-Jun-07 21:31

Is it possible to launch C# app through local network from another PC where is installed .NET Framework, if .NET Framework is not installed on our PC?

Re: Launching C# app through local network

Sathesh Sakthivel6-Jun-07 22:12

Re: Launching C# app through local network

6-Jun-07 22:12

Yes.

For Details Here[^]

Regards,

Satips. Rose | [Rose]

mav.northwind6-Jun-07 23:14

mav.northwind

6-Jun-07 23:14

Sorry, that's not what the original question was about.
He wants to run .NET apps on a computer without .NET.

Regards,
mav

--
Black holes are the places where God divided by 0...

Re: Launching C# app through local network

mav.northwind6-Jun-07 23:13

mav.northwind

6-Jun-07 23:13

No it isn't.
Wherever a .NET application is to be run you've got to have the .NET Framework installed. Period.

Regards,
mav

--
Black holes are the places where God divided by 0...

How to bind dynamically table column from database to dorpdownlist of Radgrid

Lopamudra Panda6-Jun-07 21:10

Lopamudra Panda

6-Jun-07 21:10

Hi,
Right now i m working on a project this a requirement for my project...
i donot know to how to do this....

The sky is on limit for me.

Re: How to bind dynamically table column from database to dorpdownlist of Radgrid

Sathesh Sakthivel6-Jun-07 21:14

6-Jun-07 21:14

One post is enough in BTW why are you creating the new thread for the same.

Regards,

Satips. Rose | [Rose]

Oledb PArameters

Tauseef A6-Jun-07 20:51

Tauseef A

6-Jun-07 20:51

actually i m new to dot net

i m using oledb connection

and my query is

"select * from tableabc where name = ? and id = ?"

i dont know how to map these parameters to my command object can any body tell me please

thanks

hello

hello

Re: Oledb PArameters

Sathesh Sakthivel6-Jun-07 20:56