OpenNETCF Desktop Communication Library

New Post: OpenNETCF Desktop Communication Error

MadApe — Wed, 22 Feb 2012 18:48:34 GMT

Ignore this please. I shut down Visual Studio and restarted and now it works. A gremlin in the system has been exorcised.

New Post: OpenNETCF Desktop Communication Error

MadApe — Wed, 22 Feb 2012 16:55:56 GMT

I tried reusing old code that worked in the past. I connect to the device and I transfer to the PC. Works well on first pass. However if the user wants to re-transfer the file he is getting an error if the file resides on the PC from a previous transfer.

Here is the code that I use to copy the file:

MyRapi.CopyFileFromDevice(strPCCopyDestination, strDevCopySource, True)

This works on first transfer. Doesn't after that.

The error reported is:

OverFlow Exception was unhandled.

Arithmetic operation resulted in an overflow.

Thinking that my OpenNetCF was out of date I checked and it was, so I downloaded the Jan 2012 version and built my own OpenNETCF Desktop Communication DLL. The end result is I am still getting the same overflow error.

I thought that the boolean part of the copy, when set True, would overwrite any copy on the destination folder.

What is going on? Do I have to write a separate utility outside of OpenNETCF to handle duplicate files now?

Thanks

MadApe

Created Issue: 64-bit compliance [9148]

AHDPOH — Wed, 01 Feb 2012 20:46:32 GMT

Related issues: 7906; 8497.

My solution:
private const short INVALID_HANDLE_VALUE = -1;
->
private static IntPtr INVALID_HANDLE_VALUE = (IntPtr)(-1); // compiler does not allow making this const :(

Plus you have to remove all IntPtr->int casts (compiler shall show these).

New Post: how to copy folder from windows ce device using openNETCF desktop communication library

avtividad — Wed, 18 Jan 2012 06:57:55 GMT

hi pradeep,

try using the below code to check if folder exists in the device:

string strPath_Mobile = @"\pipes_mobile\";

MessageBox.Show("Folder '"+strPath_Mobile+ "' exists? Result = " + rapi.DeviceFileExists(strPath_Mobile + ".").ToString());

Hope it helps.

Commented Issue: GetDeviceVersion crashes with x64 [7906]

NJLDoc — Tue, 17 Jan 2012 00:09:47 GMT

Hello,

I've downloaded the lastest version from svn respository (rev 45072) and I've noticed that CeGetVersionEx(out VersionInfo) crashes on GetDeviceVersion call when library is built for x64 platform. It works correctly on x86.
(file RAPI.cs line 1136).

I have read the previous issues #5278 and #7045, but I have no clues, on how to resolve this issue.

Do you guys have any idea ?

Hervé
Comments: ** Comment from web user: NJLDoc **

I have the same issue. Anytime the communication dll is used the program hangs raising {"Attempted to read or write protected memory. This is often an indication that other memory is corrupt."} I do not get the error if there is no device connected. The simple code that follows is a sample and I cannot break into code when the device is attached.

Public Shared Function DevicePresentAndConnected() As Boolean
Dim bSuccess As Boolean
Using oRapi As New RAPI
Try
If oRapi.DevicePresent Then
'oRapi.Connect()
bSuccess = True
'oRapi.Disconnect()
Else
bSuccess = False
End If
Catch ex As RAPIException

End Try
End Using
Return bSuccess

End Function

New Post: how to copy folder from windows ce device using openNETCF desktop communication library

pradeepsvv — Fri, 23 Dec 2011 14:46:03 GMT

this is pradeep,

I working with smart device, i am creating application for windows ce device, to file transfer i use openNETCF desktop communication.dll. Now I want to copy folder from device and check whether the folder exists in the device or not.

Please help me......

Thanks in advance

New Post: Faulting module rapi.dll

dietervd — Mon, 19 Dec 2011 09:28:42 GMT

Below is the code i use to read a file from the scanner.

This routine is executed every 5 seconds.

    Private Sub ScanDevice()
        Dim oRAPI As New RAPI
        Try

            'Set remote file
            Dim RemoteFile As String = "\Application\MCL\Projects\Default\AA.dat"

            'Set local file
            Dim Filename As String = "C:\Temp\" & Format(DateTime.Now, "yyyyMMddhhmmss") & ".txt"

            'Check device present
            If Not oRAPI.DevicePresent Then Return

            'Open connection
            oRAPI.Connect()

            'Check device connected
            If Not oRAPI.Connected Then Return

            'Check remote file
            If oRAPI.DeviceFileExists(RemoteFile) Then

                'Get file size to check if the file is locked
                Try
                    oRAPI.GetDeviceFileSize(RemoteFile)
                Catch ex As Exception
                    Return
                End Try

                'Copy remote file
                oRAPI.CopyFileFromDevice(LocalFile, RemoteFile, True)

                'Delete remote file
                oRAPI.DeleteDeviceFile(RemoteFile)

            End If

        Catch ex As RAPIException

        Finally

            'Disconnect from device
            oRAPI.Disconnect()

            'Dispose object
            oRAPI.Dispose()

        End Try
    End Sub

New Post: Faulting module rapi.dll

dietervd — Mon, 19 Dec 2011 09:09:36 GMT

Hi,

I am using the OpenNETCF.Desktop.Communication.DLL (version 2.9.4262.14435) to read a file from a Motorola MT2070 scanner.

I have written an application in vb.NET (Framework 4.0) that checks every 5 seconds if a file is available on the scanner.

If a file is available it is copied from the scanner to a local folder on the pc for further processing.

The program runs fine for most of the time, but occasionally i get an error like the one below, causing the program to close.

This problem occurs both with ActiveSync on Windows XP or with Windows Mobile Device Center on Windows 7.

System.Runtime.InteropServices.COMException (0x80070006):
at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
at System.Runtime.InteropServices.Marshal.ThrowExceptionForHR(Int32 errorCode)
at OpenNETCF.Desktop.Communication.RAPI.Connect(Boolean WaitForInit, Int32 TimeoutSeconds)
at OpenNETCF.Desktop.Communication.RAPI.Connect()
at Scanner_Interface.FrmMain.CheckDevice()
at Scanner_Interface.FrmMain.TimerClock_Tick(Object sender, EventArgs e)
at System.Windows.Forms.Timer.OnTick(EventArgs e)
at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Another issue I have is that the program sometimes freezes on the CeGetFileAttributes function in routine DeviceFileExists.

After 5 to 10 minutes the program continues again, but in the meantime the endusers have already restarted the program (with Task Manager).

After restarting the program everything works fine.

public bool DeviceFileExists(string RemoteFileName)
{
// check for connection
CheckConnection();

uint attr = CeGetFileAttributes( RemoteFileName );

if ( attr == 0xffffffff )
return false;

return true;
}

Does anyone recognize these issues ?

Any help is welcome…

Reviewed: Initial Release (Dec 05, 2011)

mailvirender — Mon, 05 Dec 2011 20:04:13 GMT

Rated 1 Stars (out of 5) - ***let me check

New Post: Track percentage of file copied

patrict — Thu, 01 Dec 2011 05:15:02 GMT

Obviously to display the percentage copied you can use a timer to periodically update a label:

private void tmrCopyProgress_Tick(object sender, EventArgs e) {
    lblDone.Text = m_rapi.PercentageDone.ToString() + "%";
}

New Post: Track percentage of file copied

patrict — Thu, 01 Dec 2011 05:11:29 GMT

Hi guys,

I have made another modification to my copy of the project and thought Id post it in case anyone else finds it useful. It may not be the perfect way to do it, but works well for my needs.

Overview: I have a C# desktop application that allows a user to copy files to a device. I run the actual copy process in a BackbgroundWorker.

The requirement: To be able to track the progress of the file copy.

The solution: Track the percentage copied during the file copy. Code below (my additions in red, ellipses denote exclusion of existing code for ease of reading):

namespace OpenNETCF.Desktop.Communication {
    public class RAPI : IRAPI {
	...

        // Progress percentage
        private decimal m_decPercentageDone = 0;
        public decimal PercentageDone {
            get {
                return Math.Round(m_decPercentageDone);
            }
        }

        // Allow progress percentage to be reset
        public void ResetPercentage() {
            m_decPercentageDone = 0;
        }

	...

        public void CopyFileToDevice(string LocalFileName, string RemoteFileName, bool Overwrite)
        {
	    ...

            // open the local file
            localFile = new FileStream(LocalFileName, FileMode.Open, FileAccess.Read);

            // Get the size of the complete file
            decimal lngFileSize = localFile.Length;
	    ...

            while (bytesread > 0) {
	       ...

                // Calculate the percentage copied
                lowsize = CeGetFileSize(remoteFile, ref highsize);
                if (lowsize == uint.MaxValue) {
                } else {
                    m_decPercentageDone = (decimal)((lowsize + (highsize << 32)) / lngFileSize) * 100;
                }
            }
        ...

As you can see, if I am unable to get the percentage done I do nothing - I figure that the file copy is more important than the progress reporting... Please feel free to improve this - I am extremely new to C# so I figured most of this out by looking at existing code.

I have implemented this in the CopyFileFromDevice() method as well, but Im sure you can figure it out based on the above (in fact its more simple because you can use localfile.length to get the size of what has already been copied from the device, instead of having to use CeGetFileSize()...).

Happy coding!

Regards,
Patric

New Post: Interrupting copy of large files

patrict — Fri, 11 Nov 2011 09:16:52 GMT

Hi guys,

First post, so firstly thank you for a great library - I have just started with C# .Net and mobile development, and this has really made my life easier!

I have encountered (and been able to resolve) the following problem. I have only been working with C# for a month I will show you what I have done and leave up to you what would be the best/most correct way to implement it into the project (if you so wish of course).

Overview: I have a desktop application that allows a user to copy files to a device. I run the actual copy process in a BackbgroundWorker.

The scenario: Sometimes the files to be copied may be large, and as such I would like to allow the user the option to cancel the copy. Sending a CancelAsync() to the BackbgroundWorker will tell the worker thread that it should stop running at a safe point, but for this to happen the current file copy must first complete.

The problem: There is no way to interrupt the file copy

The solution: Add an InterruptCopy flag to the rapi class which will allow one to break out of the file copy process. Code below (my additions in red, ellipses denote exclusion of existing code for ease of reading):

namespace OpenNETCF.Desktop.Communication {
    public class RAPI : IRAPI {
	...

	private bool m_blnInterruptCopy = false;

        public bool InterruptCopy {
            get {
                return m_blnInterruptCopy;
            }
            set {
                m_blnInterruptCopy = value;
            }
        }

		
        public void CopyFileToDevice(string LocalFileName, string RemoteFileName, bool Overwrite) {
	    ...

            // read 4k of data
            bytesread = localFile.Read(buffer, filepos, buffer.Length);
            m_blnInterruptCopy = false;
            while (bytesread > 0) {
                // Check if we must interrupt the copy process
                if (m_blnInterruptCopy) {
                    break;
                }
				
                // move remote file pointer # of bytes read
                filepos += bytesread;

                // write our buffer to the remote file
                if (!Convert.ToBoolean(CeWriteFile(remoteFile, buffer, bytesread, ref byteswritten, 0))) { // check for success
                    CeCloseHandle(remoteFile);
                    throw new RAPIException("Could not write to remote file");
                }
                try {
                    // refill the local buffer
                    bytesread = localFile.Read(buffer, 0, buffer.Length);
                }
                catch (Exception) {
                    bytesread = 0;
                }
	    }
			
            // close the local file
            localFile.Close();

            // close the remote file
            CeCloseHandle(remoteFile);

            // If the copy was interrupted then remove the incomplete file
            if (m_blnInterruptCopy) {
                DeleteDeviceFile(RemoteFileName);
            } else {
                // sync the date/times
                SetDeviceFileTime(RemoteFileName, RAPIFileTime.CreateTime, File.GetCreationTime(LocalFileName));
                SetDeviceFileTime(RemoteFileName, RAPIFileTime.LastAccessTime, DateTime.Now);
                SetDeviceFileTime(RemoteFileName, RAPIFileTime.LastModifiedTime, File.GetLastWriteTime(LocalFileName));
            }
        }

Then when I want to interrupt the copy of a large file in my code, I simply set the InterruptCopy flag to true:

m_rapi.InterruptCopy = true;

Obviously this can be extended to other file actions.

I hope this is a useful addition, I know that I searched for a solution for about 4 hours before I decided to brave trying it myself :)

Regards,
Patric

New Post: support for .net 4 framework projects

sparco — Tue, 01 Nov 2011 00:27:31 GMT

Hi,

I am currently doing a WPF project based on .net 4 framework.

The application needs to connect to a mobile device using opennetcf dlls. I have made this to on Debug mode, but if I compile it in Release mode, it throws an error saying that the library is not compatible with .net 4.

I have also tried compiling the opennetcf project as .net 4, and add the reference to my wpf project. Still it does not let me compile in release mode.

Regards,

New Post: copyFile to device

FrankBoonen — Sun, 16 Oct 2011 15:16:56 GMT

I checked discussions but couldn't find the answer on the issue about copying a file from the desktop to the device.

I get the error "could not create remote file" so what should I do?

I use version 2.9.4218.21446 of the OpenNETCF.Desktop.Communication.DLL

Computer runs Windows 7 professional (64bit)

PDA uses Windows CE Professional

best regards

Frank Boonen

New Post: How do I access a file?

timjurik — Tue, 20 Sep 2011 19:09:46 GMT

Thanks. I had just figured it out.

My mistake was that I was using the local file and remote file in the wrong places in the call to CopyFileFromDevice().

Thanks for the speedy reply.

New Post: How do I access a file?

DavyMac — Tue, 20 Sep 2011 18:55:30 GMT

VB.Net:

Imports OpenNETCF.Desktop.Communication

    Private Function DoesCEFileExist(ByVal FileName As String) As Boolean
        ConnectToiPAQ()
        Return myrapi.DeviceFileExists(FileName)
        DisconnectFromIpaq()
    End Function

    Private Sub ConnectToiPAQ()
        If myrapi.DevicePresent Then
            myrapi.Connect()
        Else
            MessageBox.Show("Please connect your device to your PC using ActiveSync/WMDC before clicking the OK button.", "Device was not detected")
            If myrapi.DevicePresent Then
                myrapi.Connect()
            Else
                MessageBox.Show("Please connect your device to your PC using ActiveSync/WMDC before clicking the OK button. If you have just docked your unit, please wait for ActiveSync/WMDC to start up and connect to your devicebefore pressing OK", "Device still has not been detected")
                If myrapi.DevicePresent Then
                    myrapi.Connect()
                Else
                    MessageBox.Show("Please verify " & Me.SyncMethod() & " is running and displays 'Connected' before clicking the OK button. If the device cannot be detected at this point, this application will shut down.", "Device was not detected, last try.")
                    If myrapi.DevicePresent Then
                        myrapi.Connect()
                    Else
                        Throw New Exception("DeviceNotConnected")
                    End If
                End If
            End If
        End If
    End Sub

    Private Sub DisconnectFromIpaq()
        myrapi.Disconnect()
        myrapi.Dispose()
    End Sub

    Private Sub CopyFilefromDeviceToPC()

        ConnectToiPAQ()

        If DoesCEFileExist(DevicePath + FileName) = True Then
            Try
                myrapi.CopyFileFromDevice(SourcePath & File, DevicePath & File)
            Catch ex As Exception
                Throw New Exception("ErrorCopyingFileFromDevice:" & ex.Message)
            End Try
        Else
            Throw New Exception("FiledoesntExistOnDevice")
        End If

        DisconnectFromIpaq()

    End Sub

New Post: How do I access a file?

timjurik — Tue, 20 Sep 2011 18:38:33 GMT

I cannot seem to get the file copy or any other method to work.

I can connect to the device - but what type of address scheme is the file system/file naming format.

I do not understand how to do what I want which is:

- Copy a file (or a directory) from the device to my local computer.

Thanks

Created Issue: Problems with RAPI.Invoke [8680]

Nuzikprogrammer — Mon, 12 Sep 2011 02:51:57 GMT

Hello!

Todays I've faced with a bug inside RAPI.Invoke method. Before executing CeRapiInvoke, the method copies data from the byte array into HGLOBAL:

public void Invoke(string DLLPath, string FunctionName, byte[] InputData, out byte[] OutputData)
{
// ...

// copy outgoing data to the pointer - too bad we don't have a memcpy fcn
for(int i = 0 ; i < InputData.Length ; i++)
{
Marshal.WriteInt16(sendData, i, InputData[i]);
}

// ...
}

The problem is that it uses WriteInt16 instead of WriteByte method which leads to memory corruption, since it is always written one byte more than it was allocated.

New Post: Can not get CopyFileToDevice to work under WCF Service

punprom — Thu, 08 Sep 2011 18:06:26 GMT

OS: Win 7 Utlimate 32bits

Service developed in VS2010 and Mobile app in VS2008

2 Devices: 1 in Pocket PC 2003 & 1 in Mobile 6

Hi,

I am using OpenNETCF.Desktop.Communication library version 2.9.4 with my WCF service using VS2010. The service is called from a MVC web application but I am testing it from the .Net tool WcfTestClient.exe. My service is extracting data from the database when the WCF service method is called. It create Xml file to a folder and the OpenNet communication dll copy the Xml file on to the device.

When I ran the service under debug from VS2010, and add service under localhost:xxxx (port no), the service seems copy to the device correctly. When I published to local IIS it's failed to copy the Xml file to the device. I guess it might be some sort of permission but I am not sure where to look.

I am pretty new to WCF service development and my knowledge of IIS 6 & 7 not terrific, any one can help will be great. Thanks for reading and help.

Punprom.

New Post: function calls fail without reason

massar — Mon, 15 Aug 2011 09:15:11 GMT

Hi everyone

I'm using desktop communication library for about a year now, I just recently switched my hand held from a WinCE5 to a WM6 Pro one, now all the function calls like reading a registry key, device file exist, copy from device, simply fail without providing any info, I used rapi calls directly and it is the same. however it can detect that the device is present and the connected disconnected events are fired accordingly. can anyone please help me with the matter?

Thanks in advance

Device & program Info:

Windows Mobil 6 Professional

.NetCF 3.5