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you could use a datastructure in the client and the server that maps the data and convert to bytes and then decode that data again on the another side . the datastructure may contain the database table coloum names if the both tables on the two sides are same...
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Hey, first post here so sorry if im all over the place here. my previous experience is VB6 and picaxe chips! (lol: "goto main")
I have started my C# (2008) project and made some progress. At the minute i have 3 main classes: Program.cs, SerPort.cs (essentially input into the program) and Output.cs (output from the program). I can deal will the input and output alright, i have an event in serport.cs when data arrives, it grabs the data and sends it to a method in my output.cs that deals with it.
I started this project as a blank C# project as i dont need a form most of the time. I have added code into Program.cs to stick a notify icon in the notify area, fine. The right click menu of this notify icon has 'Exit' and 'Settings'. I have coded the exit event fine, but am having trouble with settings. I need it to open a form which i have made but i need it to do it so the user can only open it once (try right clicking the system clock and clicking properties twice - i want it to work like that)
im pretty new to C# and im picking up as i go along and the problem with showing the form seems to be that the method for the event is a static one (whatever static means), if i try and make it not static, i get an error in my Main method(which is also static), if i try and make my Main method not static it says there isnt a valid static main entry point - GRRR :P
im using this command at the minute: Form Setting = new Settings(); Setting.ShowDialog(); i understand that if i use this in the brackets of showdialog, it should make it modal, but for that my method needs to be non-static. basically i have nothing to own the form, so i can just open as many as i like!
my program is started by "Application.Run();" at the minute, should i make it like a project would be if it were started as a windows forms project and use "Application.Run(form);" and define my notify icon within the form, then hide the form until someone hits the "settings" button? is this bad practise to have the form sat there all the time it isnt being used? should i just stick an if statement before the ShowDialog command to check if the form is already there and activate it if it is (is this what happens when you right click the clock and click properties?)
thanks so much for any help and im sorry this is such an essay, ive just got so many questions and i dont know the conventions. after this is sorted i should be able to deal with the settings (so long as they work in a similar way to VB6 lol) and finish everything off
thanks, Sam
here is my current program.cs, (MediaCenterController is my output.cs):
namespace Video_Duke_Box
{
class Program
{
public Thread trd;
static void Main()
{
if (SerPort.OpenPort())
{
icn = new NotifyIcon();
ContextMenuStrip menu = new ContextMenuStrip();
icn.ContextMenuStrip = menu;
ToolStripMenuItem COMMenuItem = new ToolStripMenuItem("COM Port", null, new EventHandler(COMMenuItem_Click));
ToolStripMenuItem ExitMenuItem = new ToolStripMenuItem("Exit", null, new EventHandler(ExitMenuItem_Click));
ToolStripSeparator separator = new ToolStripSeparator();
menu.Items.AddRange(new System.Windows.Forms.ToolStripItem[] { COMMenuItem, separator, ExitMenuItem });
icn.Visible = true;
icn.Icon = Properties.Resources.ehshell_IDI_APP1;
icn.ShowBalloonTip(3000, "Connected", "Duke Box is Connected", ToolTipIcon.Info);
MediaCenterController MCC = new MediaCenterController();
MCC.MediaStateChange += new MediaCenterController.MediaCenterHandler(SerPort.MediaCenter_Running);
MCC.MediaStateChange += new MediaCenterController.MediaCenterHandler(MediaCenter_Running);
Thread trd = new Thread(new ThreadStart(MCC.MediaCenterRunning));
trd.IsBackground = true;
trd.Start();
Application.Run();
}
else
{
}
}
static public void MediaCenter_Running(object MCRObject, MediaCenterEventArg state)
{
if (state.on)
{ icn.Icon = Properties.Resources.ehshell_IDI_APP2; }
else
{ icn.Icon = Properties.Resources.ehshell_IDI_APP1; }
}
static void COMMenuItem_Click(object sender, EventArgs e)
{
Form Setting = new Settings();
Setting.ShowDialog();
}
static void ExitMenuItem_Click(object sender, EventArgs e)
{
icn.Dispose();
SerPort.comport.Close();
Application.Exit();
}
private System.Windows.Forms.NotifyIcon notifyIcon1;
private System.Windows.Forms.ContextMenuStrip contextMenuStrip1;
private System.Windows.Forms.ToolStripMenuItem cOMPOrtToolStripMenuItem;
private System.Windows.Forms.ToolStripMenuItem exitToolStripMenuItem;
public ContextMenuStrip menu;
class ControlContainer : IContainer
{
ComponentCollection _components;
public ControlContainer()
{
_components = new ComponentCollection(new IComponent[] { });
}
public void Add(IComponent component)
{ }
public void Add(IComponent component, string Name)
{ }
public void Remove(IComponent component)
{ }
public ComponentCollection Components
{
get { return _components; }
}
public void Dispose()
{
_components = null;
}
}
public static NotifyIcon icn;
}
}
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Ok then, I think I understood some of that 
I think there's a keyword in VB 'shared' which means the same as static. Static means things belong to the class rather than to instances of it.
What this means is that anything which is static can only refer to other static things - because you don't have any reference to a particular instance of the class.
As a suggestion to get you going, change all your methods to be non-static and rename the Main to something else. Then create a new static main, and in there instantiate the Program class, then call your old main function - does that make sense? Something like this:
static void Main()
{
Program program = new Program();
program.OldMainFunction();
}
Then you'll be working with an instance of a Program rather than class level...
Regards,
Rob Philpott.
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sweet!
thanks, looks like a bit of work, but i was thinking that i needed to ditch the static at some point, just wasnt sure how :P
so you dont think i need to restructure it? having the form created only when the user presses the button is the right thing to do?
ill have a go at that now, and thanks for taking the time to understand my ramblings!
another problem im going to have when i have finished it all is making the installable, i would love to include some drivers in the install, is this hard to do? (drivers werent written by me)
cheers
sam
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tbh I've never written anything which is invoked from an icon on the task bar so I'm not too sure. It doesn't look quite right to me, but I'm struggling to put my finger on what's wrong.
Suggestion - make the Form a member variable of your Program class. This way, you can only ever have one. If it's set already, you don't need to new it up. Making the form modal may well render your notification tray menu inactive, so I consider going modeless.
As a tip, if you know you're going to be working in Windows (as opposed to a console app) I'd always start a Windows Application project. You'll have to change project settings and add references later on otherwise.
If you're new to this stuff I'd say you were doing pretty well for your first app!
Regards,
Rob Philpott.
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thanks, well i was very pleased i managed to make my own event for windows media center starting (thats that thread starting near application.run()), found the right guide for it and it wasnt too bad: http://www.ondotnet.com/pub/a/dotnet/2003/06/23/progCsharp3.html?page=1[^] i was surprised that creating a loop was the way to check for an event... is this an unpro way of doing it?
i have done VB6 before as i say, but yea just botching code together until it stops giving an error :P the big difference is how many levels u can have: solution, namespace, class, method. its definitely a big difference from a picaxe where you get 14 bytes of data for variables :P
right when you say member variable of my class do you mean using Form.Showdialog(this) ? all this lingo is washing over my head at the minute... or do u mean defining it outside of a method? like private Settings settings;
i think what looks wrong to you is that notifyicons are normally defined in a form? or maybe some icons are defined at the bottom that shouldnt be (they are copied from the form when i was fiddling)
by the way is system.linq needed at the top, everything i create seems to have it, but it just throws up an error so i deleted it :P
so no ideas about including a driver in an install file? is there any command i can use to make windows install a driver? how easy is it to stick custom code into the installer, there were basically 0 with the VB6 package and deployment wizard lol
cheers
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samskiter wrote: i was surprised that creating a loop was the way to check for an event... is this an unpro way of doing it?
Not sure what you mean. Events get fired and have handlers which respond when fired. There's no looping normally.
samskiter wrote: have done VB6 before as i say, but yea just botching code together until it stops giving an error
VB6 is hideous. C# is a dream!
samskiter wrote: member variable of my class
Something like this (usually at the top of the class definition):
private Form _theForm;
samskiter wrote: by the way is system.linq needed at the top
No you don't need that. Delete it, and remove any references to System.Linq in the references folder in the solution. It's a new .NET 3.5 thing and not something to worry about while you're still learning.
Don't really know about the driver bit I'm afraid. Visual Studio does do setup projects but I doubt it supports installing drivers. You'll have to Google around a bit I think.
Regards,
Rob Philpott.
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right, i have tried everything under the sun at the top:
public Settings setting;
private Settings setting;
private Form setting;
public new Settings setting;
but the only way i can make setting.ShowDialog(); work is by using Settings setting = new Settings(); just above it in the click event method.
otherwise i get this error once the program is running (is this a runtime error lol?):
Object reference not set to an instance of an object.
Rob Philpott wrote: Don't really know about the driver bit I'm afraid. Visual Studio does do setup projects but I doubt it supports installing drivers. You'll have to Google around a bit I think.
Cool, will do, its not vital :P the easier the install, the better tho :P
Rob Philpott wrote: VB6 is hideous. C# is a dream!
haha i've been told that but i like it in a way, probs cos im used to it! hmm, this project is my first experience of .NET :P its not so bad
Rob Philpott wrote: Not sure what you mean. Events get fired and have handlers which respond when fired. There's no looping normally.
hmmm, well this is the heart of my event, and this is that that new thread is required for, at the minute it fires the event when calc.exe is started or exited:
public void MediaCenterRunning()
{
for (; ; )
{
Thread.Sleep(1000);
bool onoff = (System.Diagnostics.Process.GetProcessesByName("calc").Length != 0);
Debug.WriteLine(onoff);
if (onoff != on)
{
MediaCenterEventArg StateInfo = new MediaCenterEventArg(onoff);
if (MediaStateChange != null)
{
MediaStateChange(this, StateInfo);
}
}
on = onoff;
}
}
i just fumbled the event together out of code chunks and that guide and a bit of fudging 
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please send a code with example?
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please check this[^] article.
Calin
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Hi guys,
Im getting this error :
Min (110) must be less than or equal to max (-1) in a Range object.
when doing some operations on my datatable
System.ArgumentException: Min (110) must be less than or equal to max (-1) in a Range object.
at System.Data.Select.GetBinaryFilteredRecords()
at System.Data.Select.SelectRows()
at System.Data.DataTable.Select(String filterExpression, String sort, DataViewRowState recordStates)
at System.Data.DataTable.Compute(String expression, String filter)
Here is my code:
for (int i = 0; i < list.Count; i++)
{
lt.Add(list[i].ToString()); -------this is the line that causes the error???
maxObject = dtPar.Compute("MAX(Act_doorlooptijd)", "bijelkaar =" + list[i].ToString());
ls.Add(maxObject.ToString());
}
Any idea's what is wrong here? 
Thanks
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Hi,
your message isn't clear.
What is lt, you should show its declaration.
What is list[], you should show its declaration.
Your exception's stacktrace seems to show .NET class and method names without line numbers, rather than your cladd and method names with line numbers.
You should debug in debug build, not in release build; that way you get line numbers.
You should also tell your IDE (Visual Studio?) to show line numbers in all editor windows, so you can match the exception to the line where it occurs. I doubt it is where you indicated.
ArgumentException is what you often get when you pass inacceptable values to a .NET method or property, say the Minimum, Value and Maximum properties of a scrollbar.
Could it be list[] is somehow set as the DataSource to lt, whatever that is?
that is the only way I can imagine the statement you indicate causes those .NET methods to execute.
And please show code using the "code block" button, which adds PRE tags, a background color, a monospaced font, and preserves formatting.
Luc Pattyn [Forum Guidelines] [My Articles]
- before you ask a question here, search CodeProject, then Google
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get
- use the code block button (PRE tags) to preserve formatting when showing multi-line code snippets
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Just got through the same issue. Just add single quotes around the value:
maxObject = dtPar.Compute("MAX(Act_doorlooptijd)", "bijelkaar ='" + list[i].ToString()+"'");
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i want to compare two .dat file.One .dat file contains lines of file name with it record count and size.
MRR_GIQ_FR_X03_M0808_GIQDTL_GIQDTLCTCT.dat~612~3~
MRR_GIQ_FR_X03_M0808_GIQDTL_GIQDTLDETL.dat~1036~3~
MRR_GIQ_FR_X03_M0808_GIQDTL_GIQDTLMTG.dat~875~3~
We need to write a code to compare each .dat file with .dat file.
when record count and size differ it must exit,else continue with next file.
my code is
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.IO.Compression;
namespace ConsoleApplication1
{
class Class1
{
public bool splitFile = false;
static void Main(string[] args)
{
CompareFiles();
}
//Compare 2 files
public static void CompareFiles()
{
string srcFile = "C:\\SampleFile\\MRR_GIQ_FR_X03_M0808_GIQDTL_GIQDTLCTCT.dat";
string destFile = "C:\\SampleFile\\MRR_GIQ_FR_X03_M0808_STATS.dat";
if (Class1.FileCompare(srcFile,destFile))
{
Console.Write("Files are equal.");
}
else
{
Console.Write("Files are not equal.");
}
}
private static bool FileCompare(string file1, string file2)
{
int file1byte;
int file2byte;
FileStream fs1;
FileStream fs2;
// Determine if the same file was referenced two times.
if (file1 == file2)
{
// Return true to indicate that the files are the same.
return true;
}
// Open the two files.
fs1 = new FileStream(file1, FileMode.Open);
fs2 = new FileStream(file2, FileMode.Open);
// Check the file sizes. If they are not the same, the files
// are not the same.
if (fs1.Length != fs2.Length)
{
I NEED THE CODE HERE TO COMPARE THESE TWO DAT FILE
}
// Read and compare a byte from each file until either a
// non-matching set of bytes is found or until the end of
// file1 is reached.
do
{
// Read one byte from each file.
file1byte = fs1.ReadByte();
file2byte = fs2.ReadByte();
}
while ((file1byte == file2byte) && (file1byte != -1));
// Close the files.
fs1.Close();
fs2.Close();
// Return the success of the comparison. "file1byte" is
// equal to "file2byte" at this point only if the files are
// the same.
return ((file1byte - file2byte) == 0);
}
PLEASE HELP WITH CODE OR ANY USEFUL LINKS.........
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Hi,
That is a lot of code already, without much being achieved.
You do not really have to test for identical files, same length, etc; if the data comparison is present and correct, that would generate the right result anyway; checking for identical files and same length, are optimisations that initially will make your testing more difficult. I suggest you concentrate on the heart of the matter first.
You probably don't need FileStreams at all.
Assuming both files are text files, you could use File.ReadAllLines() twice, then sort both arrays, and compare the two arrays.
Assuming the lines are in a fixed order (maybe the filenames are ordered alphabetically) you could even just use File.ReadAllText().
Luc Pattyn [Forum Guidelines] [My Articles]
- before you ask a question here, search CodeProject, then Google
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get
- use the code block button (PRE tags) to preserve formatting when showing multi-line code snippets
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how to create a set up file for a project
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You can create a new setup project in VS 2005.
Include the project you would like to create a setup file for. Add the dlls to dependency and then Build it.
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- right click on your newly created setup project
- go to View -> File System
- you'll see a new opened window
- right click on Application Folder -> Add -> Project Output
- select the project and Primary Output
Calin
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You can also use Inno Setup here[^]. It's a free installer for Windows programs with nice feature set and good stability.
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Dear All,
I have an application which is reading a datagram from the client.
If the bytes to be read is greater that are equal to the byte sent, then it is working fine.
But my requirement is to read the data by 10 bytes at a time or specific bytes configured by the user.
I don't know how to achieve this.
The code used is:
private void OnReceive(IAsyncResult ar)
{
try
{
IPEndPoint ipeSender = new IPEndPoint(IPAddress.Any, 0);
EndPoint epSender = (EndPoint)ipeSender;
int aCount = serverSocket.EndReceive(ar);
Data msgReceived = new Data(byteData);
string aReadData = System.Text.ASCIIEncoding.ASCII.GetString(byteData, 0, aCount);
int aPacketEnd = aReadData.LastIndexOf("|");
if (aPacketEnd == -1)
{
aPacketEnd = aReadData.LastIndexOf('\0');
}
if (aPacketEnd != -1)
{
string aValidData = System.String.Empty;
string aPacketData = System.String.Empty;
if (myBuffer.Length > 0)
{
aValidData = System.Text.ASCIIEncoding.ASCII.GetString(myBuffer);
}
if (aPacketEnd < aCount - 1)
{
myBuffer = new byte[aCount - (aPacketEnd + 1)];
System.Buffer.BlockCopy(byteData, aPacketEnd + 1, myBuffer, 0, aCount - (aPacketEnd + 1));
}
else
{
myBuffer = new byte[0];
}
System.Threading.Thread.Sleep(100);
byte[] message = new byte[10];
serverSocket.BeginSendTo(message, 0, message.Length, SocketFlags.None, epSender,
new AsyncCallback(OnSend), epSender);
byte []byteData = new byte[10];
serverSocket.BeginReceiveFrom(byteData , 0, byteData.Length, SocketFlags.None, ref epSender,
new AsyncCallback(OnReceive), epSender);
}
else
{
byte[] aTempArray = new byte[myBuffer.Length];
System.Buffer.BlockCopy(myBuffer, 0, aTempArray, 0, myBuffer.Length);
myBuffer = new byte[aTempArray.Length + (aCount)];
System.Buffer.BlockCopy(aTempArray, 0, myBuffer, 0, aTempArray.Length);
System.Buffer.BlockCopy(byteData, 0, myBuffer, aTempArray.Length, aCount);
byteData = new byte[0];
byteData = new byte[10];
serverSocket.BeginReceiveFrom(byteData, 0, byteData.Length, SocketFlags.None, ref epSender,
new AsyncCallback(OnReceive), epSender);
}
}
catch (Exception ex)
{
IPEndPoint ipeSender = new IPEndPoint(IPAddress.Any, 0);
EndPoint epSender = (IPEndPoint)ipeSender;
byteData = new byte[10];
serverSocket.BeginReceiveFrom(byteData, 0, byteData.Length, SocketFlags.None, ref epSender,
new AsyncCallback(OnReceive), epSender);
}
}
As the datagram sent may be very larger too, so that time I have to limit my reading.
Another important point is to send an ACK when the data transfer is completed. The start and end of the transmission is identified by the character "|".
Can any one help me to get rid of this?
Thanks a lot in advance.
Best Regards,
M. J. Jaya Chitra
modified on Thursday, February 19, 2009 6:58 AM
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Hello,
How can I read a line in PDF, a specific emplacement (ex a square) is in this square you read the line of characters line by line, thank you very much.
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I don't find how we read from file pdf, thank you verry mutch
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Have you actually followed the links, read the articles and tried any of it? The second link seems to present a way.
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Hi folks,
Is there any weatherforecating service come with webservice at free of cast? if you know please help me. Mainly that webservice should not change its resultset format frequently.
friendly,
ranandbe
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