OpenNETCF Community

Ho to read input from Microphone

olibara — Sun, 29 Apr 2012 15:09:13 GMT

Hello

I need to read the stream of the Microphone to make some process on it

Is it possible With CF native ?

Or with OpenNetCF ? : I'm working with C#

Thanks for any help

Application crashes on exit when using Button2

joowa — Wed, 18 Apr 2012 12:11:27 GMT

Hi,

First of all, I don't really know where to post this, since I don't know if it's an OpenNetCF bug or if it's me missing something.

I'm developing an application for a handheld scanner (Symbol MC 3090 with WinCE 5.0, .NET CF 3.5). This application works fine, but now it has to work on WinCE 6.0 (Symbol 3190) as well. I'm having a serious problem with that & after narrowing down the search (after many frustrating days) I found out that it had something to do with OpenNetCF.

The problem is as follows; from the moment I use an OpenNetCF.Windows.Forms.Button2 control, the application crashes on exit (i tried just closing the form, Application.Exit, Application2.Exit, all the same). In fact, I don't even have to use it on a form or user control, just declaring one and calling the constructor causes the same problem (no error when I call the constructor, just on application exit!!). This only happens when I run on WinCE 6.0. The button doesn't even have to be declared in the main form itself, also when another dialog with a button2 on it gets called, the application crashes when the main form is closed.

I don't get the error when i run the app from Visual Studio. However, when I run it on my scanner and then attach the process to the debugger (set on "Native (smart device) code"), I get the following errors (with no stack-trace and the error is impossible to catch).:

First-chance exception at 0x41aa9b98 in ExitErrorTest.exe: 0xC0000005: Access violation reading location 0x41aa9b98.

Unhandled exception at 0x41aa9b98 in ExitErrorTest.exe: 0xC0000005: Access violation.

Unhandled exception at 0x400272d0 in ExitErrorTest.exe: 0xC0000005: Access violation.

After those errors, a messagebox appears : "Application xxx has encountered a serious error and needs to shut down". I can't just let this be, because my update mechanism shuts down the app and restarts it at night (after downloading the newest version). I can't let the message box block that process.

I have no idea what to do with this, since the exception can't be catched and only occurs in WinCE 6.0. I already spent several days until I found out this was causing the problem.s

I have a little test project, but haven't been able to upload it so far. The main form has 2 regular windows forms buttons. One button calls a dialog with a regular winforms button, the other button calls the one with the opennetcf button2. In the first case, the app doesn't crash on exit, in the second case, it does.

Any ideas on this? Thanks in advance, this is frustrating me to the bone

Joowa

bandwidth occupation while searching nearby APs

jamesshao8 — Fri, 30 Mar 2012 09:00:05 GMT

I am developing a software on Windows Mobile that searches APs periodically. The software on smartphone returns information (including GPS position, and Signal Strength with certain interested APs) to another computer by WLAN, meanwhile it receives some controlling command from the computer. The problem is the network experience a stoppage every time the timer(to trigger the nearby AP searching) ticks. It is just a stoppage but disconnection, so I suppose the searching process occupates too much bandwidth. I'm wondering how to solve this issue, either by increasing searching process (by using Refresh()? but it doesnt work here...) or confining the range to those SSIDs that are in the interest somehow?

VB.NET - Kiosk application that uses camera

IanTheTitan — Wed, 28 Mar 2012 14:04:54 GMT

Hi! I'm in the process of writing a Windows Mobile application in Visual Basic.NET that disables the start menu, taskbar and SIP button. However, this presents a problem, since the application must be able to take photos, but when the taskbar is disabled, so it the camera button (on the device itself) This is the code that does the hiding and disabling: Imports System.Runtime.InteropServices 'THE Class can be used as such in the code 'Dim bc As New BarControl 'bc.HideStartButton() 'bc.HideTaskBar() 'bc.HideSIP() Public Class BarControl Private Shared Function GetForegroundWindow() As IntPtr End Function Private Shared Function SHFullScreen(ByVal hwndRequester As IntPtr, ByVal dwState As Integer) As Boolean End Function Private Shared Function EnableWindow(ByVal hwnd As IntPtr, ByVal bEnable As Boolean) As Boolean End Function Private Shared Function FindWindow(ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr End Function Private Const SHFS_SHOWSTARTICON As Integer = &H10 Private Const SHFS_HIDESTARTICON As Integer = &H20 Private Const SHFS_HIDESIPBUTTON As Integer = &H8 Private Const SHFS_SHOWSIPBUTTON As Integer = &H4 Private Const SHFS_SHOWTASKBAR As Integer = &H1 Private Const SHFS_HIDETASKBAR As Integer = &H2 Private Shared Function SetTaskBarEnabled(ByVal bEnabled As Boolean) As Boolean Dim hwnd As IntPtr = FindWindow("HHTaskBar", Nothing) If Not hwnd.Equals(IntPtr.Zero) Then If bEnabled Then Return EnableWindow(hwnd, True) Else Return EnableWindow(hwnd, False) End If End If Return True End Function Private Shared Function SetTaskbarVisible(ByVal visible As Boolean) As Boolean Dim hwnd As IntPtr = FindWindow("HHTaskBar", Nothing) If Not hwnd.Equals(IntPtr.Zero) Then If visible Then Return SHFullScreen(hwnd, SHFS_SHOWTASKBAR) Else Return SHFullScreen(hwnd, SHFS_HIDETASKBAR) End If End If End Function Private Shared Function SetStartButtonVisible(ByVal visible As Boolean) As Boolean Dim hwnd As IntPtr = GetForegroundWindow() If Not hwnd.Equals(IntPtr.Zero) Then If visible Then Return SHFullScreen(hwnd, SHFS_SHOWSTARTICON) Else Return SHFullScreen(hwnd, SHFS_HIDESTARTICON) End If End If End Function Private Shared Function SetSIPVisible(ByVal visible As Boolean) As Boolean Dim hwnd As IntPtr = GetForegroundWindow() If Not hwnd.Equals(IntPtr.Zero) Then If visible Then Return SHFullScreen(hwnd, SHFS_SHOWSIPBUTTON) Else Return SHFullScreen(hwnd, SHFS_HIDESIPBUTTON) End If End If End Function Public Shared Sub ShowTaskBar() SetTaskBarEnabled(True) SetTaskbarVisible(True) End Sub Public Shared Sub HideTaskBar() SetTaskbarVisible(False) SetTaskBarEnabled(False) End Sub Public Shared Sub ShowSIP() SetSIPVisible(True) End Sub Public Shared Sub HideSIP() SetSIPVisible(False) End Sub Public Shared Sub HideStartButton() SetStartButtonVisible(False) End Sub Public Shared Sub ShowStartButton() SetStartButtonVisible(True) End Sub End Class Here are just a few things I tried: * The code in http://community.opennetcf.com/forums/p/283/49837.aspx, but it did not work. * I used Remote Spy to catch the messages and the hex values sent when the various parts of the apps are enabled and disabled. Any ideas or suggestions will be very much appreciated! Thanks in advance!

OpenFileDialog in OpenNETCF

difilippocarlos — Wed, 28 Mar 2012 11:01:29 GMT

hola,

primero disculpen por mi mal ingles.
Estoy haciendo una aplicacion en vb.net y necesito ver en un FileDialog los archivos del dispositivo movil.
Hay alguna forma de hacerlo con el OpenNETCF

msn: carl89_cba@hotmail.com

Gracias

================================================================================

hello,

first sorry for my bad English.
I am making an application in vb.net and need to see in a FileDialog mobile device files.
Is there any way to do it with OpenNETCF

msn: carl89_cba@hotmail.com

thanks

SDF 2.3.1 release notes

Quest — Tue, 27 Mar 2012 06:33:37 GMT

Hi all,

we purchased the SDF standard edition, 2.3.0, last year and I noticed that there was an update to the community edition available online, but I can't seem to find out what changes there are in the new version so we can determine if we want to updgrade.

Are there any release notes available?

Regards,

Andre

Connecting using WiFi

lucacicala — Mon, 16 Jan 2012 16:46:13 GMT

I'm writing an application to search the AP with the highest strength and then to connect to it.

After I found the best AP I run following code. It always return true! But every time the current IP is 0.0.0.0 so I suppose no connection is available.

Where am I wrong?

OpenNETCF.Net.NetworkInformation.EAPParameters eap = new OpenNETCF.Net.NetworkInformation.EAPParameters();

eap.Enable8021x = true;

eap.EapType = EAPType.Default;

eap.EapFlags = EAPFlags.Enabled;

bool b = false;

lock (m_syncRoot)

{

b = this.wirelessAdapter.AddPreferredNetwork(this.bestAccessPoint.Name, false, passphrase, 1, this.bestAccessPoint.AuthenticationMode, this.bestAccessPoint.Privacy, eap);

}

if (b)

{

lock (m_syncRoot)

{

return this.wirelessAdapter.ConnectToPreferredNetwork(this.bestAccessPoint.Name);

}

else

{

return false;

}

How can i use Semaphore

huyhu — Thu, 12 Jan 2012 13:47:35 GMT

hi all, as you know there is no Monitor class in System.Threading. so i decided to do this work with Semaphores but there is no Semaphore in CF too. Can you give me an example for usage of createsemaphore function ? thanks in advance

VirtualPathProvider vs. BaseHandler

kasper — Fri, 16 Dec 2011 11:01:28 GMT

The HOLP303 recommends using VirtualPathProvider, where as two blog posts: http://blog.opennetcf.com/ctacke/2010/02/05/HostingRESTfulWebServicesInWindowsCEPartI.aspx http://blog.opennetcf.com/ctacke/2010/02/05/HostingRESTfulWebServicesInWindowsCEPartII.aspx show how to use HttpHandlers directly, i.e. by deriving from BaseHandler. When would you recommend using either approach?

File Attachment Mail Message

pfingsten.bob@con-way.com — Wed, 29 Apr 2009 14:04:34 GMT

I must be missing something really basic here. How do I add a file attachment...

SmtpClient client = new SmtpClient(SmtpServer);

MailMessage mailMessage = new MailMessage(FromEmailAddress, ToEmailAddress);

mailMessage.Body = body;

mailMessage.Subject = subject;

mailMessage.BodyEncoding = Encoding.ASCII;

mailMessage.SubjectEncoding = Encoding.ASCII;

mailMessage.Attachments.Add(.........

WebServer Hosting in wince 7.0

naksha — Wed, 30 Nov 2011 09:34:44 GMT

Can any one tell me if Padarn web server is supported in wince 7.0 , if yes then how to install this in device ? from the site i have got only evaluation material which is having 2 dlls ie> OpenNETCF.Ssl.dll and OpenNETCF.Web.dll, m not able to see any download for evaluation version of this server ,please guide

Sending Mail By Attached File

iman_s52 — Mon, 28 Nov 2011 22:36:44 GMT

Hi I want to attached any file by can not set file path is it a bug ???????? how can solved it ?

Difference between DateTime.Now and DateTimeHelper.LocalTime

k_sze — Mon, 28 Nov 2011 05:35:56 GMT

I'm working with .NET Compact Framework 3.5 on Windows CE 6. Is there any difference between the value returned by DateTime.Now and the value returned by OpenNETCF.WindowsCE.DateTimeHelper.LocalTime? A quick Try-It-And-See didn't reveal any difference. Does OpenNETCF.WindowsCE.DateTimeHelper.LocalTime provide a getter (in addition to the setter) only for the sake of convenience and consistency?

About Bluetooth,OpenNETCF,32feet

Nemo — Mon, 07 Nov 2011 09:31:17 GMT

I use a USB bluetooth dongle connect to PC,it's been enumerated as a COM device,now i want to develop an application communicate with a bluetooth module,the device searching is finished such as:

using System.Net.Sockets;
using OpenNETCF;
using OpenNETCF.Net;
using OpenNETCF.Net.Bluetooth;
using OpenNETCF.Net.Sockets;

private void Search_Click(object sender, EventArgs e)
{
    BluetoothClient blueToothClient = new BluetoothClient();
    textBox1.AppendText("Discovering Devices... ");
    comboBox1.Items.Clear();     bluetoothDeviceInfo = blueToothClient.DiscoverDevices(6);     foreach (BluetoothDeviceInfo bDi in bluetoothDeviceInfo)
    {
        //if (bDi.DeviceName == "IT-300 BT Dev")//i set my bluetooth module as "IT-300 BT Dev"
        {
            comboBox1.Items.Add(bDi.DeviceName);
            comboBox1.SelectedIndex = 0;
        }
           
        textBox1.AppendText(bDi.DeviceID + " " + bDi.DeviceName + " ");
    }
    comboBox1.SelectedIndex = comboBox1.Items.IndexOf("IT-300 BT Dev");     textBox1.AppendText(bluetoothDeviceInfo.Length + " Devices found. ");     if (comboBox1.SelectedIndex == 0)
        textBox1.AppendText("Find IT-300 BT Dev!");
    else
        textBox1.AppendText("Did not find IT-300 BT Dev!");     textBox1.AppendText(" " + System.Environment.NewLine);
}

Now,if the bluetooth module's pairing code is "1234",then how to finish the pairing process,and when the pairing is finished wether the communication can be read/write the COM port?someone's kind to provide me a example?

this code is base on OpenNETCF,it's said that 32feet is another choice,but i didn't find the method,is there someone kind to give me some help?

Any sample code for MemoryMappedFile class?

josejoye — Mon, 19 Jan 2009 18:47:46 GMT

Hello,

I'm looking for a sample code for the MemoryMappedFile class. Is this somewhere available?

Thanks,

José

By the way, using the 'Search' menu, I was not able to find anything on this topic. However, using google, it points me to: http://community.opennetcf.com/forums/p/10515/10515.aspx. Am'I using the search incorrectly?

Rest web server with post HttpHandler

gogu — Wed, 09 Nov 2011 17:42:22 GMT

Hi, I have implemented a GET and a POST HttpHandler. They both work. I made performance tests on GET and works excelent. On POST is horrible slow. I am using POST with binary raw data. It returns the result expected - but it is way slower than the GET. Is it something I am missing?

Padarn web page

gogu — Sat, 05 Nov 2011 22:36:25 GMT

Hi,

I downloaded demo Creating Hello World Padarn web page. I succesfully deploy to Win CE 6.0 device (framework 3.5). When I access the page Default.aspx I got System.Web.HttpException: Cannot find page or file '/Default'.

What am I missing? I am running a custom build of Win CE.

Than you,

How to implement a BT pairing/communication between a USB BT dongle and BT module with OpenNETCF?

Nemo — Mon, 07 Nov 2011 02:42:15 GMT

I use a USB bluetooth dongle connect to PC,it's been enumerated as a COM device,now i want to develop an application communicate with a bluetooth module,the device searching is finished such as:

using System.Net.Sockets;
using OpenNETCF;
using OpenNETCF.Net;
using OpenNETCF.Net.Bluetooth;
using OpenNETCF.Net.Sockets;

private void Search_Click(object sender, EventArgs e)
{
    BluetoothClient blueToothClient = new BluetoothClient();
    textBox1.AppendText("Discovering Devices...\n");
    comboBox1.Items.Clear();

bluetoothDeviceInfo = blueToothClient.DiscoverDevices(6);

    foreach (BluetoothDeviceInfo bDi in bluetoothDeviceInfo)
    {
        //if (bDi.DeviceName == "IT-300 BT Dev")
        {
            comboBox1.Items.Add(bDi.DeviceName);
            comboBox1.SelectedIndex = 0;
        }

        textBox1.AppendText(bDi.DeviceID + "\t" + bDi.DeviceName + "\n");
    }
    comboBox1.SelectedIndex = comboBox1.Items.IndexOf("IT-300 BT Dev");

textBox1.AppendText(bluetoothDeviceInfo.Length + " Devices found.\n");

    if (comboBox1.SelectedIndex == 0)
        textBox1.AppendText("Find IT-300 BT Dev!");
    else
        textBox1.AppendText("Did not find IT-300 BT Dev!");

textBox1.AppendText("\r\n" + System.Environment.NewLine);

}

embed Movie on Windows Moblie 6.1 with VBscrpt and .NET

G.Toggwyler — Sun, 30 Oct 2011 12:17:24 GMT

Hi all i try to make a kind of quiz for geocaching by using a windows mobile 6.1 the idea is that a short movie is played (about 20 seconds) and then i ask a question about the movie. my problem is to embed the movie in the .net solution-form does anyone have experience with it?

Create a notify icon with Windows Mobile

mylogin — Tue, 18 Oct 2011 14:12:30 GMT

Hi,

we created a Windows Mobile 6.0 program with a notify icon,

but that icon is hidden (we are sure that it exists because we can click on it).

Wen instead the same program run on Windows CE 5, that icon is correctly shown.

Can you tell why on Windows Mobile 6.0 that icon is hidden?

Thank you.

FTP connection WebRequestMethods.Ftp.ListDirectory

Kevin.McKeever — Tue, 18 Oct 2011 22:04:04 GMT

Hi,

I was writing to see how to set the request.Method for ftp messages in the OpenNetCF Smart Device. I can open the ftp port but when I try to set the request.Method = WebRequestMethods.Ftp.ListDirectory i get an exception 'System.ArgumentException', "Value does not fall within the expected range."

I would like to get the list of files in a directory. Do you know if this works and what I might be doing wrong? Does the Ftp support the full list of ftp commands? I have included the code below.

Thanks,

using System;
using System.Net;
using System.Text;
using System.IO;
using OpenNETCF.Net;
using OpenNETCF.Net.Ftp;

private static FtpWebRequest request;
private static Stream ftpRequestStream;

        public bool DisplayFileFromServer()
        {
            StringBuilder result = new StringBuilder();
            try
            {
                FtpRequestCreator creator = new FtpRequestCreator();
                FtpWebRequest.RegisterPrefix("ftp:", creator);

IPAddress ip = IPAddress.Parse("10.16.48.18");

Uri serverUri = new Uri("ftp://" + ip + "/");

                request = (FtpWebRequest) FtpWebRequest.Create(serverUri);
                request.Binary = true;

                request.Credentials = new NetworkCredential("anonymous", "1");
                request.Method = WebRequestMethods.Ftp.ListDirectory;

                ftpRequestStream = request.GetRequestStream();
                FtpWebResponse response = (FtpWebResponse)request.GetResponse();

                StreamReader streamReader = new StreamReader(response.GetResponseStream());

                string line = streamReader.ReadToEnd();
                while (line != null)
                {
                    result.Append(line);
                    result.Append("\n");
                    line = streamReader.ReadLine();
                }

result.Remove(result.ToString().LastIndexOf('\n'), 1);

                streamReader.Close();
                //response.Close();

                return true;
            }
            catch ( Exception e)
            {
                return false;
            }

}

Trouble building SDF

steve at somewhere — Thu, 13 Oct 2011 21:52:26 GMT

We just purchased the Pro Edition of the smart device framework, installed, did the suggested edit removing the publickey (by Neil Cowburn), and attempted to build.

I get the following error:

C:\Program Files\Smart Device Framework\Source\OpenNETCF\OpenNETCF\Diagnostics\SwitchesDictionarySectionHandler.cs(50,32): error CS0115: 'OpenNETCF.Diagnostics.SwitchesDictionarySectionHandler.ValueRequired': no suitable method found to override

Plus of course a cascade of other failures because OpenNetCF.dll failed to build.

Any thoughts?

Unable to compile OpenNetCF 2.3 project

kankele — Sat, 13 Jun 2009 14:31:12 GMT

I just purchased the standard edition and I am trying to compile the source. I first got the public key error but with the help of these forums have resolved that. Now I am getting the following error

Error 1 'OpenNETCF.Diagnostics.SwitchesDictionarySectionHandler.ValueRequired': no suitable method found to override D:\Smart Device Framework\Source\OpenNETCF\OpenNETCF\Diagnostics\SwitchesDictionarySectionHandler.cs 50 32 OpenNETCF (OpenNETCF\OpenNETCF)

Any help would be greatly appreciated.

Ken

AddPreferredNetwork always returns true?

alex1313 — Tue, 04 Oct 2011 16:01:30 GMT

Hello,

We just bought the library (v2.3.0.39). Awesome :)

I am trying to connect to a AccessPoint from the code. The code is below.

Regardless of the key the AddPreferredNetwork function call always returns true. Also I suspect that the function call changes the key on the AccessPoint, that's why it's always true.

Could you please help me to understand what's going on here and how to accomplish the connect.

The code

---------------------------------------------------------------------------------------------------------------------------------

         private void btnConnect_Click(object sender, EventArgs e)
        {
            ShowBusyMessage("Connecting to Network " + tbexNetworkName.Text);

            bool connected = false;
            string SSID = tbexNetworkName.Text;
            string key = tbexPassword.Text;
            foreach (INetworkInterface ni in NetworkInterface.GetAllNetworkInterfaces())
            {
                if (ni is WirelessNetworkInterface)
                {
                    WirelessZeroConfigNetworkInterface wzcni = ni as WirelessZeroConfigNetworkInterface;
                    OpenNETCF.Net.NetworkInformation.AccessPointCollection col = wzcni.NearbyAccessPoints;
                    foreach (OpenNETCF.Net.NetworkInformation.AccessPoint ap in col)
                    {
                        if (ap.Name == SSID)
                        {
                            AuthenticationMode mode = ((WirelessNetworkInterface)ni).AuthenticationMode;
                            WEPStatus wep = ((WirelessNetworkInterface)ni).WEPStatus;
                            OpenNETCF.Net.NetworkInformation.EAPParameters ep = new OpenNETCF.Net.NetworkInformation.EAPParameters();

                            connected = wzcni.AddPreferredNetwork(SSID, true, key, 1, mode, wep, ep);
                        }
                    }
                }
            }

            HideBusyMessage();

            if (!connected)
            {
                pmlblConnectResult.Text = "Password Failed";
            }
            else
            {
                ShowPreviousView();
            }
        }

---------------------------------------------------------------------------------------------------------------------------------

OpenNetCF.IO in Community Edition?

WiredlessInTx — Tue, 27 Sep 2011 20:29:09 GMT

Hi I was looking for the dll for OpenNetCF.IO (i need to use memory mapped files) but I did not see it in the dlls directory. Is this available in the Community Edition? I checked in the "C:\Program Files (x86)\Smart Device Framework\Bin folder"

If its not in this edition then which edition is it in?

Thanks