Compact Framework strange Exception - Mobile Discussion Boards

hi:

I´m writing a program for printing to bluetooth serial port profile.
Since it is managed like a serial port connection I´m able to send data to the printer, but the problem is that if I turn off the printer while sending data, the application doen´t detect it.

Could anyone tell me if there is some way to check the status of the connection ?

Thanks
Fernando Simoes

hi i want to know what is the difference b/w socket programming in desktop and on the pda. the ports are same or the pda had not ports for socket programming .

ddd

Hi. What kind of PDA do you have? are you using Windows CE?
Fon WinCE the sockets functions are the same as for win2K.

FS.

i m programming for pocket pc 2002 and using the emulator. and need information about the ports. in desktop computer we had the ports for socket programming 1028 to onward so i want to know that these are same as desktop computer.

ddd

Hi all.
I had a look at microsoft's web and I saw a SP3 update for Compact Framework 1.1. Its has two editions, Ddeveloper and Customer.

Customer installs the update on the device (PDA or so) via Async...
and Developer edition only installs some emulator updates for the desktop Visual Studio 2003.

But... how do I update the .NET Compact Framework of the desktop Visual Studio 2003? Is it neccesary?

Thanks to all!!

how to retrive the keypress event/click event in .Net CE device?
i am using vb.net environment for the development
can somebody help me?

sachin

I don't know why embedded visual studio 4 sp3 does this but it checks all the dependant files in a multiproject workspace. My project has several DLL's in the workspace, 6, and when ever I start the debuger it checks each one multiple times on the handheld. It takes about 5 minutes to get the debugger up and running each time I have to stop and compile. Does anyone know how I can stop this from happening. Is there a registry hack or a setting I am not seeing? It has become increasingly anoying. By the way eVC 3 did not do this. This is new to version 4.

Thanks in advance,
Jim

I've developed a simple C# program (for PocketPC), and It sometimes crashes with an unhandled exception... and I thing it is related to UI matters. The message is this:

Exception
Application::Run+0xf
Form1::Main+0xa

Mi application read info from serial port (from a GPS), with this event handler:

private void OnDataReceived(object sender, SerialDataReceivedEventArgs e) <br />
{ <br />
while(port != null && port.BytesToRead > 0) <br />
{ <br />
int Cnt = port.Read(portBuf, portPos, 1); <br />
<br />
if (Cnt != 0) <br />
{ <br />
//Read from input buffer <br />
if (portBuf[portPos] == '\n') <br />
{ <br />
string sentence = Encoding.ASCII.GetString(portBuf, 0, portPos-1); <br />
AddResult(sentence); <br />
<br />
portPos = 0; <br />
} <br />
else <br />
{ <br />
portPos++; <br />
} <br />
} <br />
} // while <br />
} <br />

After much investigation, now I am able to cause that exception by clicking a button. The code is this, simple one:

<br />
private void btnClosePort_Click(object sender, System.EventArgs e) <br />
{ <br />
Cursor.Current = Cursors.WaitCursor; <br />
<br />
// Wait for things to settle <br />
Thread.Sleep(1000); <br />
<br />
try <br />
{ <br />
  port.DataReceived -= new SerialDataReceivedEventHandler(OnDataReceived); <br />
  // Wait <br />
Thread.Sleep(1000); <br />
<br />
  port.Close(); <br />
  port.Dispose(); <br />
  port = null; <br />
} <br />
catch (Exception ex) <br />
{ <br />
  AddResult("-->Failure"); <br />
  AddResult(ex.ToString()); <br />
} <br />
<br />
Cursor.Current = Cursors.Default; <br />
<br />
AddResult("-->Closed"); <br />
} <br />

Notes: AddResult simple does add strings into a ListBox.

The really strange thing is this: if I remove the AddResult(sentence) call in "OnDataReceive", the exception is not thrown.

Could it be any bug related to UI ?
My hardware: iPAQ 2100 , Windows Mobile 2003 SE

Hope you can help me Smile | :)

Thanks to all!

Hi,

Is there a way to send a FAX from Pocket PC using C# ?

Thanks

Hello everybody?

I am trying to know how I can detect changes in data streams.
But I don’t have any practice this field.
I found 1 paper and read it. But I didn’t understand fluently it. ( http://www.cs.technion.ac.il/~shai/vldb04.pdf)
If you have any idea about detecting changes in data streams, can you help me?
Also can you explain to me algorithm that presented paper?
What is distance anything?
My e-mail address is u_bulga@yahoo.com.
Thank you so much for your help.

Thank you

Hi,

I'm using vb.net and a Windows CE.net device. I have three xml Files that I want to read into a single Dataset so that I can use a dataRelation. The copy method used to a copy a table doesn't seem to be supported in the compact framework. Mad | :mad:

Any ideas how you do this?

I'm trying to use the dataset.readxml method to get the tables into three datasets and then combine the tables into one dataset.

Any help would be greatly appreciated.

This is quite old but I landed here as I was looking for something related.
using ReadXML works only with one file at a time; Once the first file is read the subsequent once wont be read. It creates one dataset with one table.
Alternative way would be to create a dataset for each of the xml files then merge the datasets.
There seems to be a way of creating the dataset from the xsd file and thus retain relationships and constraints. I am looking out for that badly!

Hi,

I have an Intermec 700C device running PPC2003 1ST EDITION and I'm looking
for a way to to change the screen orientation programmatically. I have
already tried the API "ChangeDisplaySettingsEx" function but it didn't work.

I know that the Second Edition supports this, but the manufacturer says that
upgrading to the Second Edition the existing devices that my client already uses is
not possible. Therefore the OS has to remain PPC 2003 1st Edition.

After some investigation, it seems that the only way to do this is by
creating a display driver that supports screen rotation using a tool by
Microsoft called the "Platform Builder" which is usually supplied to device manufacturers.

Unfortunately, this is not included with my MSDN Subscription, so my
question is if anybody knows where can I find a display driver that
supports screen rotation with PocketPC 2003 First Edition?

I also know that there is a utility to do this but the customer requires
that I do it from within the application(that is programmatically).

TIA

George Papadopoulos
Cosine Consultants Ltd

We need to activate a bluetooth connection via code instead of going through the bluetooth manager.

any ideas how to do this or links?

//Roger

did you find anything that works?
I have the same question

thanks

tim

Nope, still no idea.

ANy ideas how to programatically enable and disable the start bar (win CE V 4.2)

.nuetter

Has anyone had success in overriding CompareItem in a ListBox-derived class, in a PocketPC MFC app? I've tried lots of variations but CompareItem never gets called. (in a EVC 4/C++ project). Any ideas?

I am new to windows and C++ programming. I am developing an evc++ 4.0 application for a handheld
computer running CE .NET 4.2. I have a dialog with many edit box controls. How do I change focus to
the next control in the tab order when the user enters the max number of characters allowed for the
current control. (I have defined the max number of characters by creating member variables via the
ClassWizard.). Do I have to check for an EN_CHANGE message and then check the length and then call
NextDlgCtrl or is there an easier way? Thanks in advance for any assistance.

sandem wrote:
Do I have to check for an EN_CHANGE message and then check the length and then call NextDlgCtrl or is there an easier way? Thanks in advance for any assistance.

Yes, that's the way to go. I'm afraid there's no easier way.

Regards,
João Paulo Figueira
Embedded MVP

-- modified at 4:46 Thursday 8th September, 2005

thank you for your response.

One more question. Is it more efficient to use UpdateData() and CString method GetLength() to determine length of the member variable OR to use GetDlgItemText()?

Dear all,

I'm having problem displaying mixture of chinese and english character in multibyte format on a dialog box.

If I have a char array like this:
char szText[18];
szText[0] = 0xa7;//first chinese character
szText[1] = 0x41;//first chinese character
szText[2] = 0xa6;//second chinese character
szText[3] = 0x6e;//second chinese character
szText[4] = 0x20;//the rest are single byte english character
szText[5] = 0x48;
szText[6] = 0x6f;
szText[7] = 0x77;
szText[8] = 0x20;
szText[9] = 0x61;
szText[10] = 0x72;
szText[11] = 0x65;
szText[12] = 0x20;
szText[13] = 0x79;
szText[14] = 0x6f;
szText[15] = 0x75;
szText[16] = 0x3f;
szText[17] = 0x00;

How do I convert them to a CString type and display on the dialog box.
I have tried to use MultiByteToWideChar() function but was unsuccessful Confused | :confused:

.
Pls help and advise. Thank you.

Hi All,

I am currently developing software for a Windows CE PC which i currently
dont have the hardware, thus I am using the emulator for VS2003. The
software writes out Timesheet entries to file on the WIndows CE PC which
I have done but I require to get the files off the emulator to confirm
the are correct.

Is this possible with the Emulator or would I need the hardware for that?

Best Wishes

Stuart

Hi everybody,
I want to develop an application for PDA device in which I must open a web page that include mpg and waw files and I must open those filse too. So I need something like an web browser activeX control under win ce but I don't know where I can find one.
I someoane Know another solution for my problem please helpe me...

Thanks,