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Hi all!i am using microsoft visual studio.net 2003.i have create a class for communication with serial port via RS-232.It contains read and write function.i run this in the console application.Class 1 is all the function and class 2 is my MAIN.i use Main to call the read and write function.Can someone please please help me how i can read unlimited bytes?How to call the Public MemoryStream Read(int bufSize) to my MAIN?I try it so many time but still fail to do it..Please please help me..Thanks a lot!
This is my Class 1
using System;
using System.Runtime.InteropServices;
using System.IO;
using System.Text;
using System.Globalization;
using System.Threading;
namespace yong
{
public class port
{
/*-- Definition of variables by Programmer --*/
/*-- Setting win32 API constants --*/
private const uint GENERIC_READ = 0x80000000;
private const uint GENERIC_WRITE = 0x40000000;
private const int CREATE_ALWAYS = 2;
private const int INVALID_HANDLE_VALUE = -1;
/*-- End ofSetting win32 API constants --*/
public int PortNum = 1; //-------------Delaring of Port number to 1
public int BaudRate = 9600; //---------Set BaudRate to 9600
public byte ByteSize = 8; //-----------Set ByteSize to 8
public byte Parity = 0; //-------------0-4 = no,odd,even,mark,space
public byte StopBits = 0; //-----------0,1,2 = 1, 1.5, 2
public int ReadTimeout = 1500; //------Set TimeOut to 1500
private int hComm = -1; //-------------Declaring of comm port win32 file handle
public bool Opened = false; //---------Declaring of Opened and set to false
/*-- End of Definition of variables by Programmer --*/
[StructLayout(LayoutKind.Sequential)]
public struct DCB
{
/*-- taken from c struct in platform sdk --*/
public int DCBlength; //-----------Sizeof(DCB)
public int BaudRate; //------------Current baud rate
public uint flags; //--------------Flags
public ushort wReserved; //--------Not currently used
public ushort XonLim; //-----------Transmit XON threshold
public ushort XoffLim; //----------Transmit XOFF threshold
public byte ByteSize; //-----------Number of bits/byte, 4-8
public byte Parity; //-------------0-4 = no,odd,even,mark,space
public byte StopBits; //-----------0,1,2 = 1, 1.5, 2
public char XonChar; //------------Tx and Rx XON character
public char XoffChar; //-----------Tx and Rx XOFF character
public char ErrorChar; //----------Error replacement character
public char EofChar; //------------End of input character
public char EvtChar; //------------Received event character
public ushort wReserved1; //-------Reserved; Do not use
}/*-- End of StructLayout DCB --*/
[StructLayout(LayoutKind.Sequential)]
private struct COMMTIMEOUTS
{
public int ReadIntervalTimeout;
public int ReadTotalTimeoutMultiplier;
public int ReadTotalTimeoutConstant;
public int WriteTotalTimeoutMultiplier;
public int WriteTotalTimeoutConstant;
}/*-- End of StructLayout Commtimeout --*/
[StructLayout(LayoutKind.Sequential)]
private struct OVERLAPPED
{
public int Internal;
public int InternalHigh;
public int Offset;
public int OffsetHigh;
public int hEvent;
}/*-- End of StructLayout Overlapped --*/
/*-- Importing of Kernel32.dll --*/
[DllImport("kernel32.dll")]
private static extern int CreateFile
(
string lpFileName, //--------------File name
uint dwDesiredAccess, //-----------Access mode
int dwShareMode, //----------------Share mode
int lpSecurityAttributes, //-------SD
int dwCreationDisposition, //------How to create
int dwFlagsAndAttributes, //-------File attributes
int hTemplateFile //---------------Handle to template file
);
[DllImport("kernel32.dll")]
private static extern bool GetCommState
(
int hFile, //---------Handle to communications device
ref DCB lpDCB //------Device-control block
);
[DllImport("kernel32.dll")]
private static extern bool BuildCommDCB
(
string lpDef, //------Device-control string
ref DCB lpDCB //------Device-control block
);
[DllImport("kernel32.dll")]
private static extern bool SetCommState
(
int hFile, //---------Handle to communications device
ref DCB lpDCB //------Device-control block
);
[DllImport("kernel32.dll")]
private static extern bool GetCommTimeouts
(
int hFile, //---------------------------Handle to comm device
ref COMMTIMEOUTS lpCommTimeouts //------Time-out values
);
[DllImport("kernel32.dll")]
private static extern bool SetCommTimeouts
(
int hFile, //---------------------------Handle to comm device
ref COMMTIMEOUTS lpCommTimeouts //------Time-out values
);
[DllImport("kernel32.dll")]
private static extern bool ReadFile
(
int hFile, //------------------------Handle to file
byte[] lpBuffer, //------------------Data buffer
int nNumberOfBytesToRead, //---------Number of bytes to read
ref int lpNumberOfBytesRead, //------Number of bytes read
ref OVERLAPPED lpOverlapped //-------Overlapped buffer
);
[DllImport("kernel32.dll")]
private static extern bool WriteFile
(
int hFile, //--------------------------Handle to file
byte[] lpBuffer, //--------------------Data buffer
int nNumberOfBytesToWrite, //----------Number of bytes to write
ref int lpNumberOfBytesWritten, //-----Number of bytes written
ref OVERLAPPED lpOverlapped //---------Overlapped buffer
);
[DllImport("kernel32.dll")]
private static extern bool CloseHandle
(
int hObject //-------Handle to object
);
[DllImport("kernel32.dll")]
private static extern uint GetLastError();
/*-- End of Importing of Kernel32.dll --*/
/*-- Function Open --*/
/*-- To Open the connection between 2 ports via RS232 --*/
public void Open()
{
DCB dcbCommPort = new DCB(); //------Declaring of DCB
COMMTIMEOUTS ctoCommPort = new COMMTIMEOUTS(); //------Declaring of COMMTIMEOUTS
/*-- Open Comm Port --*/
hComm = CreateFile( "COM" + PortNum ,GENERIC_READ | GENERIC_WRITE,0, 0,CREATE_ALWAYS ,0,0 ); //------Open comm port by calling dll from kernel32 and get the handle
/*-- Check port cannot be open --*/
if( hComm == INVALID_HANDLE_VALUE )
{
throw(new ApplicationException("Comm Port Can Not Be Opened"));
}/*-- End of Check port cannot be open --*/
/*-- Set the Time out property --*/
GetCommTimeouts(hComm,ref ctoCommPort);
ctoCommPort.ReadTotalTimeoutConstant = 0;
ctoCommPort.ReadTotalTimeoutMultiplier = 0;
ctoCommPort.WriteTotalTimeoutMultiplier = 0;
ctoCommPort.WriteTotalTimeoutConstant = 0;
SetCommTimeouts(hComm,ref ctoCommPort);
/*-- End of Set the Time out property --*/
/*-- Setting of Baud rate, Parity, Word size and Stop bits --*/
GetCommState(hComm, ref dcbCommPort); //------Get the status of current configuration
dcbCommPort.BaudRate = BaudRate; //------Setting of baud rate
dcbCommPort.flags = 0; //------Setting of Flags
//dcbCommPort.flags = 1;//------Setting of Flags
/*-- Check parity more than 0 --*/
if(Parity > 0)
{
dcbCommPort.flags = 2; //------Setting of Flags
}/*-- End of Check parity more than 0 --*/
dcbCommPort.Parity = Parity; //------Setting of Parity
dcbCommPort.ByteSize = ByteSize; //------Setting of ByteSize
dcbCommPort.StopBits = StopBits; //------Setting of StopBits
/*-- Set property and Check for error --*/
if( !SetCommState(hComm, ref dcbCommPort) )
{
throw(new ApplicationException("Comm Port Can Not Be Opened"));
}/*-- End of Set property and Check for error --*/
/*-- End of Setting of Baud rate, Parity, Word size and Stop bits --*/
//Opened = true; //------Set Opened to true
Opened = true;
}/*-- End of Function Open --*/
/*-- Function Close --*/
/*-- Closing of Comm port --*/
public void Close()
{
/*-- Check Open handle is open --*/
if (hComm != INVALID_HANDLE_VALUE)
{
CloseHandle(hComm); //------Close port
}/*-- End of Check Open handle is open --*/
}/*-- End of Function Close --*/
/*-- Function Read --*/
/*-- For receiving of data from other parties --*/
public MemoryStream Read(int bufSize)
{
byte[] BufBytes = new byte[bufSize];
MemoryStream stream = new MemoryStream();
/*-- Check Port is Open --*/
if( hComm != INVALID_HANDLE_VALUE )
{
OVERLAPPED ovlCommPort = new OVERLAPPED();
int BytesRead = 0;
while(ReadFile(hComm, BufBytes, bufSize, ref BytesRead, ref ovlCommPort) != false /* or true (based on your interop declaration) */)
stream.Read(BufBytes,0,BytesRead);
}
return stream;
}
/*-- Function Write --*/
/*-- For transfering of data from other parties --*/
public void Write(byte[] WriteBytes)
{
/*-- Check Port is Open --*/
if( hComm != INVALID_HANDLE_VALUE )
{
OVERLAPPED ovlCommPort = new OVERLAPPED(); //------Declaring of ovlCommport
int BytesWritten = 0; //------Declaring of BytesWritten and set to 0
WriteFile(hComm, WriteBytes, WriteBytes.Length, ref BytesWritten, ref ovlCommPort); //------Transfer data to RS232
}/*-- End of Check Port is Open --*/
}/*-- End of Function Write --*/
}/*-- End of class Port --*/
}
This is my class 2
using System;
using System.Text;
using System.Threading;
namespace yong
{
public class Class2
{
static void Main(string[] args)
{
port CommPort = new port();
CommPort.Open();
while(true)
{
/*call write function*/
// Convert string to byte array and send
//string x = Console.ReadLine();
//byte[] byteDateLine = Encoding.ASCII.GetBytes( x.ToCharArray() );
//CommPort.Write(byteDateLine);
/*call read function*/
//Convert Byte to String
string sBuffer = Encoding.ASCII.GetString());
Console.WriteLine( sBuffer.ToString() );
}
}
}
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I want to check that the text entered into a TextBox is a valid number.
I know that I can write some control structures to accomplish this but
is there a better method?
Requirements: Must accept positive, negative and decimal point.
Thanks in advance.....
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I'm sure there's articles on how to do this on the site. You have several options, depending on if you want to not allow non-valid chars to be typed ( you need to derive a class from the textbox ), or if you want to validate entry after the user finishes ( catch to focus lost event and use a regular expression, I believe there's a regexValidator in winforms you can use, as there is in ASP.NET. )
Christian Graus - Microsoft MVP - C++
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regexValidator it is... many thanks Boss.....
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I use CR 8.5, for the reports from my C#.NET - windows forms. I use "AxCrystal.AxCrystalReport" component for reporting, whats the way to send the report directly to printer??
"He that is good with a hammer tends to think everything is a nail."
- Abraham Maslow
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I am having some problems understanding how to wirte a c program could someone please help me.
Write a C program that displays a title, "Currency Conversion," and then write the names of five currencies and their equivalents to the US dollar. The conversions are hard coded equations. Insert comments in the program to document the program internally.
Design document: This includes a design flowchart, problem statement, list of all acceptable inputs (and their data types), and a list of all expected outputs (and their data types).
Source code: This is the complete source code listing of your program.
Version Control Sheet: This sheet keeps a maintenance log for the
program. It documents the author name, modification date, description of changes, and files changed. You will update this document while you are working on each programming assignment.
Tom J.
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trjskid wrote:
am having some problems understanding how to wirte a c program could someone please help me.
C or C# ? You're in the C# forum
trjskid wrote:
Write a C program that displays a title, "Currency Conversion," and then write the names of five currencies and their equivalents to the US dollar. The conversions are hard coded equations. Insert comments in the program to document the program internally.
Ahh... this is HOMEWORK. Welcome to the real world, kid. This is where you do your own work and only ask questions when you're stuck. If that's too hard for you, cut out the middle man and apply for a job at McDonalds today.
Christian Graus - Microsoft MVP - C++
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Christian Graus wrote:
Ahh... this is HOMEWORK. Welcome to the real world, kid. This is where you do your own work and only ask questions when you're stuck. If that's too hard for you, cut out the middle man and apply for a job at McDonalds today.
 brilliant
Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Who is Jewish, the Trivia Game!
Judah Himango
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Okay, I've done the hard part, envisioning and implementing this revolutionary new currency converting technology. I leave it to you to provide the documentation, flowcharts, graphs, PowerPoint slides and theses. I only ask that you mention my name in your acceptance speech for the Nobel Prize in Software (yes, I know there is no such thing now, but surely there will be after this):
class HighTechCurrencyConversionTechnology
{
public static void Main()
{
System.Console.WriteLine( "Currency Conversion" + System.Environment.NewLine +
"-------------------" + System.Environment.NewLine +
"$1 is 110.9900 Yen, 0.8192 Euro, $1.1995" +
" Canadian, 0.5579 UK Pounds, $1.3363 Australian.");
}
}
Matt Gerrans
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If you're attempting to learn programming, you may wish to visit MSDN at Microsoft http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbref/html/vboriVBVCSharpSamples.asp?frame=true[^]. They have quite a lot of free downloads and samples on everything from 'How to declare an object variable and assign an object to it' all the way to full-blown sample applications. As much as I hate research, there's a lot of samples out there you can look at to get the feel for some basic tasks.
Based on your assignment, you may also want to do a little research on standard coding practices - like "best practices" on how to comment, how to name your variables (check out "hungarian notation" versus "camel casing") etc. If you're really into it, try to come up with at least 3 ways to do the same thing.
These tasks in your assignment are honestly useful. In pretty much any company where you are a programmer, you will have to do flowcharts, problem statements, user requirements, use cases, and test cases to some extent, and you will have to do at least some form of documentation, anywhere from commenting your own code well, to writing technical documents on your code.
Good luck, hope you like programming.
-- modified at 21:57 Wednesday 31st August, 2005
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I'm toying with the idea of making an online card game using .NET remoting. Clients should only be able to control their player object and their own deck of cards, but other clients should have access to their events and the "back" of their decks (probably just a count of cards in the hand).
Is there a way to maybe intercept calls on the host and throw an exception if an object is marked with, say, a PlayerOnly attribute? One thing I'm having trouble understanding is how to identify the caller of a remote object.
Thanks in advance.
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Just make all remote method calls contain the ID of the user who initiated the call. That way, you can do your restrictions on the host without any wild remoting hacks.
Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Who is Jewish, the Trivia Game!
Judah Himango
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Yeah, that's my last resort solution... I wonder if there's a more elegant way to do it with Remoting though?
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When the connection is made, you should be able to get the endpoint of the player connecting, and associate that with a player's name in a hashtable, or something similar, but I'd hardly call that elegant.
Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Who is Jewish, the Trivia Game!
Judah Himango
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hi
How can I add webusercontrol in project class library
-- modified at 15:59 Tuesday 30th August, 2005
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Thanks Alomgir
I don't want add usercontrol in a windows form , i want add usercontrol in a class library
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This applies to classs library as well.
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I have a Windows Form that creates an instance of a class of my own, and within that object I need to call a function that is part of the Windows Form. The problem is I don't know how to give my class a reference to my Windows Form. If this was C++ I'd just pass a pointer through the constructor... but this isn't C++... Anyone know the proper way to get a reference to a parent object so its methods can be called?
Bungo!
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You can always pass the reference to the parent object and call methods of it. The reference is just like pointers in c++.
Live Life King Size
Alomgir Miah
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You could just pass the form to the class during instantiation using 'this' keyword. For example, assume your form is called MyForm and has a function called MyFormFunction that you want to call from MyClass:
during instantiation in MyForm:
MyClass newClass = new MyClass(this);
in MyClass:
private MyForm _externalForm; //declare as class level private variable
//ctor
public MyClass(MyForm passedFormReference)
{
_externalForm = passedFormReference;
}
public MyFormFunction()
{
_externalForm.MyFormFunction();
}
Hope this helps,
Regards,
-----
Josh Lindenmuth
jlindenmuth at paycepayroll dot com
Payce Payroll - Smart for Business
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I am designing a function that requires an asynchronous call to be made to a remote device and the reception of some data from that device. Once the data is acquired the function can return its result.
Currently the function initiates the call and terminates, waiting for a communications event to signal that the data has been received.
How do I make the function wait until the event returns the value (or times out at which time I return an error) before it terminates and returns its value?
Thanks
Chris
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if i understood you correctly you want the caller of the function wait untile its recive the signal or timeout
if this is correct So
The IAsyncResult interface returned from BeginInvoke( ) has the AsyncWaitHandle property which have some overloaded WaitOne method
One of the take Timespan parameter you can use it to pass
Timeout value
IAsyncResult asyncResult = yourDelegate.BeginInvoke(param1,param2,null,null);
asyncResult.AsyncWaitHandle.WaitOne(timeoutValue,false);
int result;
result = yourDelegate.EndInvoke(asyncResult);
WaitHandle.WaitOne Method[^]
MCAD
-- modified at 19:36 Monday 29th August, 2005
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Thanks for your response....Just so that you understand this fully:
My function has a method that just opens the comms port and dials out the number of the remote device. At that point exeution of the method terminates. At the same time in the function's class constructor I subscribe to the OnComm event (which fires whenever communications events happen, such as when receiving data). When I receive data, I parse it in the event handler of the OnComm event and if valid I fire an event with the data as its argument.
What I am looking to do is have the original method initiating the call wait until this valid data event is fired, or a timeout occurs. Once either of these happens I would like the function to return the data or an error code accordingly.
Thanks
Chris
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Just adding to the previous response
//Client Code
AsyncCallback callback = new AsyncCallback(MyCallback);
MyBeginMethod(param1, param2,..., callback, null);
private void MyCallback(IAsyncResult result)
{
MyRetType obj = EndMyMethod(result);
//Some stuff
}
//Server Code
public MyRetType MyMethod(string param1, string param2, ... )
{
//your logic
}
public IAsyncResult BeginMyMethod(string param1, string param2, ..., AsyncCallback ac, Object state)
{
MyDelegate d = new MyDelegateMyMethod);
IAsyncResult result = d.BeginInvoke(string param1, string param2, ..., ac, null);
return result;
}
public static MyRetType EndMyMethod(IAsyncResult result)
{
MyDelegate d = (MyDelegate)((AsyncResult)result).AsyncDelegate;
return d.EndInvoke(result);
}
Live Life King Size
Alomgir Miah
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