Hi,
I have written a litte application (eMbedded Visual C++) for Pocket PC 2002
to copy an exe-file from the root-directory to the startmenu-directory.
It seems to work fine, but when I start the copied application (the exe-file) I get the message
"... is not a valid Pocket PC application"
What is wrong with this applcation?
Or does anyone know how to call Copy from an Pocket PC application directly?
Here is the code:
// Setup.cpp : Defines the entry point for the application.
//
#include "stdafx.h"
#define SOURCEFILE_NAME "\\banking.exe"
#define DESTINATIONFILE_NAME "\\Windows\\Start Menu\\banking.exe"
#define DESTINATIONFILE_NAME_GERMAN "\\Windows\\Startmenü\\banking.exe"
int WINAPI WinMain( HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
// TODO: Place code here.
BOOL german = FALSE;
FILE *file = 0;
FILE *rfile = 0;
rfile = fopen (SOURCEFILE_NAME, "rb");
if (!rfile)
{
MessageBox (0, TEXT("Error"), TEXT("Setup"), MB_TOPMOST);
return 1;
}
file = fopen (DESTINATIONFILE_NAME_GERMAN, "wb");
if (!file)
file = fopen (DESTINATIONFILE_NAME, "wb");
else
german = TRUE;
if (file)
{
char buffer [1000];
size_t num_read = 0;
size_t num_written = 0;
size_t num_read_tot = 0;
size_t num_written_tot = 0;
do
{
num_read = fread (buffer, sizeof (char), 1000, rfile);
if (feof(rfile))
break;
num_read_tot += num_read;
if (num_read > 0)
{
num_written= fwrite (buffer, sizeof (char), num_read, file);
num_written_tot += num_written;
}
else
break;
} while (1);
fclose (file);
}
fclose (rfile);
DWORD attr = 0;
BOOL rc = 0;
attr = GetFileAttributes (TEXT(SOURCEFILE_NAME));
if (german)
rc = SetFileAttributes (TEXT(DESTINATIONFILE_NAME_GERMAN), attr);
else
rc = SetFileAttributes (TEXT(DESTINATIONFILE_NAME), attr);
MessageBox (0, TEXT("Ready"), TEXT("Setup"), MB_TOPMOST);
return 0;
}
// END
Hello,
You are trying to reinvent the wheel by copying yourself the info from the file. Use the CopyFile function.
But your error
"... is not a valid Pocket PC application"
Click to expand...
Click to collapse
has probably appeared for another reason...
You should also look at SHFileOperation
It's not a good idea to copy *.exe files to start menu...
Create a shortcut with CECreateShortcut(...) instead.
If this is part of a application setup (in a cab file) just create the shortcut with the build in features:
...
[DefaultInstall]
...
CEShortcuts = Shortcuts
...
[Shortcuts]
BankingMenuText,0,banking.exe
...
John
John,
thank you for your comment.
Perhaps you ore someone else can tell me how to create a shortcut (for the banking.exe) from a Pocket PC - application ?
(The background is as follows:
I want to deliver my banking-application on SD-Card;
a little setup-application on the SD-Card copies the banking.exe from SD-Card into the program-directory of the Pocket PC.
And last but not least this setup-application shoult insert a shortcut for the copied banking.exe in the Start Menu.
OK,
cabwiz.exe does exactly the job.
One open question:
How can I achieve, that after executing the cab-file is N O T deleted?
Create Shortcut with SHCreateShortcut.
Not deleting cab file : mark it as read-only on the desktop (before copying) 8)
Use at your own risk!
Code:
/*
HTC HD2 Compass interface
MilaCzeque (at) gmail.com
This program is licensed under the terms of the GNU General Public License (GPL).
*/
#include <windows.h>
#include <service.h>
struct compass_data
{
short x;
short y;
short z;
short angle;
short d;
short dummy[10]; //just to make sure nothing get overwritten
};
struct compass
{
compass_data data;
HANDLE h;
HANDLE service;
int init()
{
h = CreateFile( TEXT( "SEN0:" ), 0, 0, 0, 3, 0x80, 0 );
if( h == INVALID_HANDLE_VALUE || h == 0 )
{
h = 0;
service = RegisterService( TEXT( "SEN" ), 0, TEXT( "HTCSensorService.dll" ), 1 );
if( service == 0 )
{
return 0;
}
h = CreateFile( TEXT( "SEN0:" ), 0, 0, 0, 3, 0x80, 0 );
if( h == INVALID_HANDLE_VALUE || h == 0 )
{
h = 0;
return 0;
}
}
if( 0 == DeviceIoControl( h, 0x3000001, 0, 0, 0, 0, 0, 0 ))
{
CloseHandle( h );
h = 0;
return 0;
}
return true;
}
short update()
{
if( !h )
{
return 0;
}
DWORD read = 0;
if( 0 == DeviceIoControl( h, 0x3000003, 0, 0, &data, 0, &read, 0 ))
{
return 0;
}
else
{
return 1;
}
}
int deinit()
{
if( h )
{
if( 0 == DeviceIoControl( h, 0x3000002, 0, 0, 0, 0, 0, 0 ))
{
CloseHandle( h );
h = 0;
return 0;
}
}
return 1;
}
};
Edit:
Plese do mind that this code is licensed under GPL and so is anything based on it (including C# and VB code in this thread). This means that if you use it in your project you MUST release it under GPL (and with source code).
I'm sick of everyone ignoring this. :-(
Multitouch and the compass at a similar time?
The Leo is definately getting better!
Thanks!
Someone should inform the Layar developers about this.
maati:
Don't think that Layar would agree with GPL.
l3v5y:
It will be even better with FM Radio API working.
I had a play with this, the issue is, at current I haven't found exactly what the "angle" is. Do you know whether it's the angle between the device and North? or the bearing of the device?
It's the same number as you can see in original compass application. Angle between device and magnetic north.
MilaCzeque, thanks a lot the leo is indeed getting better and better!
I don't think you can help with this, but do you have any idea about how we might get hardware compass support in Google Maps, iGO, and other software?
I'd like to refer to this thread by the way. Thx!
Maybe someone can write program which will emulate COM port with nmea from internal gps but with heading from compass.
@MilaCzeque
Hi,
See here: http://forum.xda-developers.com/showthread.php?t=571266
Is it possible to see some sample code written in C# as well ?
Thank you very much.
Thanks!
Anyone managed to get into the proximity sensor?
Great!!!
How can this be used in C# or Vb.net ?
I dont develop in C++ for Windows Mobile.
retrieving capacitive sensor data similar. Hack touch.dll and get DeviceIOControl codes....
Can anybody translate that code in C#?
Better yet, let's make a .net library so its accessible to everyone! l3v5y?
shirreer said:
Better yet, let's make a .net library so its accessible to everyone! l3v5y?
Click to expand...
Click to collapse
That would be the best.
I tried this:
Code:
Imports System.Runtime.InteropServices
Public Class clsCompass
<DllImport("coredll.dll", SetLastError:=True, CharSet:=CharSet.Unicode)> _
Private Shared Function CreateFile(ByVal lpFileName As String, ByVal dwDesiredAccess As System.UInt32, ByVal dwShareMode As System.UInt32, ByVal lpSecurityAttributes As IntPtr, ByVal dwCreationDisposition As System.UInt32, ByVal dwFlagsAndAttributes As System.UInt32, ByVal hTemplateFile As IntPtr) As Integer
End Function
<DllImport("coredll.dll", SetLastError:=True, CharSet:=CharSet.Unicode)> _
Private Shared Function RegisterService(ByVal lpszType As String, ByVal dwIndex As System.UInt32, ByVal lpszLib As String, ByVal dwInfo As System.UInt32)
End Function
<DllImport("coredll.dll", CharSet:=CharSet.Unicode, SetLastError:=True)> Public Shared Function DeviceIoControl(<[In]()> ByVal hDevice As Integer, <[In]()> ByVal dwIoControlCode As Integer, <[In]()> ByVal lpInBuffer As IntPtr, <[In]()> ByVal nInBufferSize As Integer, <Out()> ByVal lpOutBuffer As IntPtr, <[In]()> ByVal nOutBufferSize As Integer, <Out()> ByRef lpBytesReturned As Integer, <[In]()> ByVal lpOverlapped As IntPtr) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
Const DIO_INIT As Int32 = &H3000001
Const DIO_READ As Int32 = &H3000003
Const DIO_QUIT As Int32 = &H3000002
Const INVALID_HANDLE_VALUE As Int64 = -1
Structure compass_data
Public x As Short
Public y As Short
Public z As Short
Public angle As Short
Public d As Short
Public dummy As String
End Structure
Private devHandle As Integer
Private srvHandle As Integer
Public compassData As New compass_data
Public Function initCompass()
devHandle = CreateFile("SEN0:", 0, 0, 0, 3, &H80, 0)
If devHandle = INVALID_HANDLE_VALUE Or devHandle = 0 Then
devHandle = 0
srvHandle = RegisterService("SEN", 0, "HTCSensorService.dll", 1)
If srvHandle = 0 Then Return False
devHandle = CreateFile("SEN0:", 0, 0, 0, 3, &H80, 0)
If devHandle = INVALID_HANDLE_VALUE Or devHandle = 0 Then Return False
End If
If DeviceIoControl(devHandle, DIO_INIT, 0, 0, 0, 0, 0, 0) = 0 Then Return False
Return True
End Function
Public Function updateData()
Dim readBytes As System.UInt32
If devHandle = 0 Then Return False
If DeviceIoControl(devHandle, DIO_READ, 0, 0, compassData, 0, readBytes, 0) = 0 Then
Return False
Else
Return True
End If
End Function
Public Function shutdownCompass()
If devHandle <> 0 Then
If DeviceIoControl(devHandle, DIO_QUIT, 0, 0, 0, 0, 0, 0) = 0 Then
Return False
Else
Return True
End If
End If
Return True
End Function
End Class
However, this does not compile:
Error 2 Value of type 'GPSLib.clsCompass.compass_data' cannot be converted to 'System.IntPtr'. C:\Dokumente und Einstellungen\Marco\Eigene Dateien\Visual Studio 2008\Projects\GPSLib\GPSLib\clsCompass.vb 44 55 GPSLib
I have no idea how to convert this instance of a struct to a int pointer... any ideas??
Solved that one. Now during run w/ this code, I get a NotSupported exception in updateData():
Code:
Imports System.Runtime.InteropServices
Public Class clsCompass
<DllImport("coredll.dll", SetLastError:=True, CharSet:=CharSet.Unicode)> _
Private Shared Function CreateFile(ByVal lpFileName As String, ByVal dwDesiredAccess As System.UInt32, ByVal dwShareMode As System.UInt32, ByVal lpSecurityAttributes As IntPtr, ByVal dwCreationDisposition As System.UInt32, ByVal dwFlagsAndAttributes As System.UInt32, ByVal hTemplateFile As IntPtr) As Integer
End Function
<DllImport("coredll.dll", SetLastError:=True, CharSet:=CharSet.Unicode)> _
Private Shared Function RegisterService(ByVal lpszType As String, ByVal dwIndex As System.UInt32, ByVal lpszLib As String, ByVal dwInfo As System.UInt32)
End Function
<DllImport("coredll.dll", CharSet:=CharSet.Unicode, SetLastError:=True)> Public Shared Function DeviceIoControl(<[In]()> ByVal hDevice As Integer, <[In]()> ByVal dwIoControlCode As Integer, <[In]()> ByRef nInputBuffer As Integer, <[In]()> ByVal nInBufferSize As Integer, <Out()> ByVal lpOutBuffer As compass_data, <[In]()> ByVal nOutBufferSize As Integer, <Out()> ByRef lpBytesReturned As Integer, <[In]()> ByVal lpOverlapped As IntPtr) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
<DllImport("coredll.dll", CharSet:=CharSet.Unicode, SetLastError:=True)> Public Shared Function DeviceIoControl(<[In]()> ByVal hDevice As Integer, <[In]()> ByVal dwIoControlCode As Integer, <[In]()> ByRef nInputBuffer As Integer, <[In]()> ByVal nInBufferSize As Integer, <Out()> ByVal lpOutBuffer As Integer, <[In]()> ByVal nOutBufferSize As Integer, <Out()> ByRef lpBytesReturned As Integer, <[In]()> ByVal lpOverlapped As IntPtr) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
Const DIO_INIT As Int32 = &H3000001
Const DIO_READ As Int32 = &H3000003
Const DIO_QUIT As Int32 = &H3000002
Const INVALID_HANDLE_VALUE As Int64 = -1
Structure compass_data
Public x As Short
Public y As Short
Public z As Short
Public angle As Short
Public d As Short
Public dummy As String
End Structure
Overrides Function toString() As String
Return "X: " + compassData.x + vbNewLine _
+ "X: " + compassData.x + vbNewLine _
+ "Y: " + compassData.y + vbNewLine _
+ "Z: " + compassData.z + vbNewLine _
+ "a: " + compassData.angle + vbNewLine _
+ "d: " + compassData.d + vbNewLine
End Function
Private devHandle As Integer
Private srvHandle As Integer
Public compassData As New compass_data
Public Function initCompass()
devHandle = CreateFile("SEN0:", 0, 0, 0, 3, &H80, 0)
If devHandle = INVALID_HANDLE_VALUE Or devHandle = 0 Then
devHandle = 0
srvHandle = RegisterService("SEN", 0, "HTCSensorService.dll", 1)
If srvHandle = 0 Then Return False
devHandle = CreateFile("SEN0:", 0, 0, 0, 3, &H80, 0)
If devHandle = INVALID_HANDLE_VALUE Or devHandle = 0 Then Return False
End If
If DeviceIoControl(devHandle, DIO_INIT, 0, 0, 0, 0, 0, 0) = 0 Then Return False
Return True
End Function
Public Function updateData()
Dim readBytes As System.UInt32
If devHandle = 0 Then Return False
If DeviceIoControl(devHandle, DIO_READ, 0, 0, compassData, 0, readBytes, 0) = 0 Then
Return False
Else
Return True
End If
End Function
Public Function shutdownCompass()
If devHandle <> 0 Then
If DeviceIoControl(devHandle, DIO_QUIT, 0, 0, 0, 0, 0, 0) = 0 Then
Return False
Else
Return True
End If
End If
Return True
End Function
End Class
System.NotSupportedException was unhandled
Message="NotSupportedException"
StackTrace:
bei GPSLib.clsCompass.updateData() bei GPSLib.frmMain.Timer1_Tick(Object sender, EventArgs e) bei System.Windows.Forms.Timer._WnProc(WM wm, Int32 wParam, Int32 lParam) bei System.Windows.Forms.ApplicationThreadContext._InternalContextMessages(WM wm, Int32 wParam, Int32 lParam) bei Microsoft.AGL.Forms.EVL.EnterMainLoop(IntPtr hwnMain) bei System.Windows.Forms.Application.Run(Form fm) bei GPSLib.frmMain.Main()
InnerException:
Finally finished
FINALLY!
I am not sure about the meaning of the data returned however.
Code:
Imports System.Runtime.InteropServices
Public Class clsCompass
<DllImport("coredll.dll", SetLastError:=True, CharSet:=CharSet.Unicode)> _
Public Shared Function CreateFile _
(ByVal lpFileName As String, _
ByVal dwDesiredAccess As Integer, _
ByVal dwShareMode As Integer, _
ByVal lpSecurityAttributes As IntPtr, _
ByVal dwCreationDisposition As Integer, _
ByVal dwFlagsAndAttributes As Integer, _
ByVal hTemplateFile As IntPtr) As IntPtr
End Function
<DllImport("coredll.dll", SetLastError:=True, CharSet:=CharSet.Unicode)> _
Shared Function RegisterService _
(ByVal lpszType As String, _
ByVal dwIndex As Integer, _
ByVal lpszLib As String, _
ByVal dwInfo As Integer) As Integer
End Function
<DllImport("coredll.dll", SetLastError:=True, CharSet:=CharSet.Unicode)> _
Shared Function LocalAlloc _
(ByVal uFlags As Integer, _
ByVal uBytes As Integer) As IntPtr
End Function
<DllImport("coredll.dll", SetLastError:=True, CharSet:=CharSet.Unicode)> _
Shared Function LocalFree _
(ByVal hMem As IntPtr) As IntPtr
End Function
<DllImport("coredll.dll", CharSet:=CharSet.Unicode, SetLastError:=True)> _
Public Shared Function DeviceIoControl _
(<[In]()> ByVal hDevice As IntPtr, _
<[In]()> ByVal dwIoControlCode As Integer, _
<[In]()> ByVal lpInputBuffer As IntPtr, _
<[In]()> ByVal nInBufferSize As Integer, _
<Out()> ByVal lpOutBuffer As IntPtr, _
<[In]()> ByVal nOutBufferSize As Integer, _
<Out()> ByRef lpBytesReturned As Integer, _
<[In]()> ByVal lpOverlapped As IntPtr) As Integer
End Function
Const DIO_INIT As Int32 = &H3000001
Const DIO_READ As Int32 = &H3000003
Const DIO_QUIT As Int32 = &H3000002
Const INVALID_HANDLE_VALUE As Int64 = -1
Const LMEM_FIXED = &H0
Const LMEM_ZEROINIT = &H40
Const LPTR = (LMEM_FIXED Or LMEM_ZEROINIT)
Structure compass_data
Public x As Short
Public y As Short
Public z As Short
Public angle As Short
Public d As Short
Public dummy As String
End Structure
Public rdBuf(8) As Byte
Overrides Function toString() As String
Return _
"X: " + rdBuf(0).ToString + vbNewLine _
+ "Y: " + rdBuf(1).ToString + vbNewLine _
+ "Z: " + rdBuf(2).ToString + vbNewLine _
+ "a: " + rdBuf(3).ToString + vbNewLine _
+ "d: " + rdBuf(4).ToString + vbNewLine
End Function
Private devHandle As IntPtr
Private srvHandle As Integer
Public compassData As New compass_data
Public Function initCompass()
devHandle = CreateFile("SEN0:", 0, 0, 0, 3, &H80, 0)
If devHandle.ToInt32 = INVALID_HANDLE_VALUE Or devHandle.ToInt32 = 0 Then
devHandle = IntPtr.Zero
srvHandle = RegisterService("SEN", 0, "HTCSensorService.dll", 1)
If srvHandle = 0 Then Return False
devHandle = CreateFile("SEN0:", 0, 0, 0, 3, &H80, 0)
If devHandle.ToInt32 = INVALID_HANDLE_VALUE Or devHandle.ToInt32 = 0 Then Return False
End If
If DeviceIoControl(devHandle, DIO_INIT, 0, 0, 0, 0, 0, 0) = 0 Then Return False
Return True
End Function
Public Function updateData()
' Dim readBytes As Integer
Dim buf(8) As Byte
Dim result As Integer
Dim getMemory As New IntPtr()
If devHandle = 0 Or devHandle = IntPtr.Zero Then Return False
getMemory = LocalAlloc(LPTR, buf.Length)
Marshal.Copy(buf, 0, getMemory, buf.Length)
result = DeviceIoControl(devHandle, DIO_READ, IntPtr.Zero, 0, getMemory, buf.Length, 0, IntPtr.Zero)
Marshal.Copy(getMemory, buf, 0, buf.Length)
If getMemory <> IntPtr.Zero Then LocalFree(getMemory)
If result = 0 Then
Return False
Else
rdBuf = buf
Return True
End If
End Function
Public Function shutdownCompass()
If devHandle <> 0 Then
If DeviceIoControl(devHandle, DIO_QUIT, 0, 0, 0, 0, 0, 0) = 0 Then
Return False
Else
Return True
End If
End If
Return True
End Function
End Class
Almost there...
Mapping your buffer to short[5] gives me a fair compass heading in number 4. No idea what 1..3 are, they seem to react to the device's orientation (GSensor?)
Here's the C# code (convert it back to VB with Red-Gate's .NET Reflector if you wish):
using System;
using System.Runtime.InteropServices;
namespace Sensors
{
public interface ICompass
{
/// <summary>
/// Compass heading.
/// </summary>
double Angle { get;}
/// <summary>
/// Angle is valid
/// </summary>
bool IsValid { get;}
/// <summary>
/// Start compass sensor
/// </summary>
void Start();
/// <summary>
/// Stop compass sensor
/// </summary>
void Stop();
/// <summary>
/// Reset compass sensor
/// </summary>
void Reset();
}
public class HTCCompass:ICompass
{
private IntPtr devHandle;
private int srvHandle;
public short[] buffer = new short[5];
#region ICompass
public double Angle
{
get
{
// try to connect if necessary
if(!ready) ready = initCompass();
return ready && updateData() ? buffer[3] : -1.0;
}
}
bool ready = false;
public bool IsValid { get { return ready; } }
public void Start() { ready = initCompass(); }
public void Stop() { shutdownCompass(); ready = false; }
public void Reset() { Stop(); Start(); }
#endregion
private const int DIO_INIT = 0x3000001;
private const int DIO_QUIT = 0x3000002;
private const int DIO_READ = 0x3000003;
private const long INVALID_HANDLE_VALUE = -1L;
//private const int LMEM_FIXED = 0;
//private const int LMEM_ZEROINIT = 0x40;
//private const int LPTR = 0x40;
public bool initCompass()
{
if (this.devHandle != IntPtr.Zero)
return true;
this.devHandle = CreateFile("SEN0:", 0, 0, IntPtr.Zero, 3, 0x80, IntPtr.Zero);
if ((this.devHandle.ToInt32() == INVALID_HANDLE_VALUE) | (this.devHandle.ToInt32() == 0))
{
this.devHandle = IntPtr.Zero;
this.srvHandle = RegisterService("SEN", 0, "HTCSensorService.dll", 1);
if (this.srvHandle == 0)
return false;
this.devHandle = CreateFile("SEN0:", 0, 0, IntPtr.Zero, 3, 0x80, IntPtr.Zero);
if ((this.devHandle.ToInt32() == INVALID_HANDLE_VALUE) | (this.devHandle.ToInt32() == 0))
return false;
}
int read = 0;
if (DeviceIoControl(this.devHandle, DIO_INIT, IntPtr.Zero, 0, IntPtr.Zero, 0, out read, IntPtr.Zero) == 0)
return false;
return true;
}
public bool shutdownCompass()
{
if (this.devHandle != IntPtr.Zero)
{
int read = 0;
if (DeviceIoControl(this.devHandle, DIO_QUIT, IntPtr.Zero, 0, IntPtr.Zero, 0, out read, IntPtr.Zero) == 0)
return false;
this.devHandle = IntPtr.Zero;
}
return true;
}
public override string ToString()
{
return ("X: " + buffer[0].ToString() +
"\r\nY: " + buffer[1].ToString() +
"\r\nZ: " + buffer[2].ToString() +
"\r\nA: " + buffer[3].ToString() +
"\r\nS: " + buffer[4].ToString() +
"\r\n");
}
public bool updateData()
{
byte[] buf = new byte[10];
IntPtr getMemory = new IntPtr();
if ((this.devHandle == IntPtr.Zero) | (this.devHandle == IntPtr.Zero))
{
return false;
}
getMemory = LocalAlloc(0x40, buf.Length);
Marshal.Copy(buf, 0, getMemory, buf.Length);
int read = 0;
int result = DeviceIoControl(this.devHandle, DIO_READ, IntPtr.Zero, 0, getMemory, buf.Length, out read, IntPtr.Zero);
Marshal.Copy(getMemory, buf, 0, buf.Length);
if (getMemory != IntPtr.Zero)
{
LocalFree(getMemory);
}
if (result == 0)
{
return false;
}
Buffer.BlockCopy(buf, 0, buffer, 0, buf.Length);
return true;
}
# region PInvokes
[DllImport("coredll.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern IntPtr LocalAlloc(int uFlags, int uBytes);
[DllImport("coredll.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern IntPtr LocalFree(IntPtr hMem);
[DllImport("coredll.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern int RegisterService(string lpszType, int dwIndex, string lpszLib, int dwInfo);
[DllImport("coredll.dll", CharSet=CharSet.Unicode, SetLastError=true)]
public static extern IntPtr CreateFile(string lpFileName, int dwDesiredAccess, int dwShareMode, IntPtr lpSecurityAttributes, int dwCreationDisposition, int dwFlagsAndAttributes, IntPtr hTemplateFile);
[DllImport("coredll.dll", CharSet=CharSet.Unicode, SetLastError=true)]
public static extern int DeviceIoControl([In] IntPtr hDevice, [In] int dwIoControlCode, [In] IntPtr lpInputBuffer, [In] int nInBufferSize, [Out] IntPtr lpOutBuffer, [In] int nOutBufferSize, out int lpBytesReturned, [In] IntPtr lpOverlapped);
#endregion
}
}
Hi, I have the following code, where one element can be NULL.
Code:
Select New Class_Data_Inventory With {.PARTS_AC = CDbl(Data_Inventory.Element("PARTS_AC").Value), _
.PARTS_COMPANY = Data_Inventory.Element("PARTS_COMPANY").Value, _
.PARTS_DIAM = CDbl(Data_Inventory.Element("PARTS_DIAM").Value), _
[B][COLOR="Red"].PARTS_LENGTH = CDbl(If(Data_Inventory.Element("PARTS_LENGTH").Value Is Nothing, Data_Inventory.Element("PARTS_LENGTH").Value, "0")), [/COLOR][/B]_
.PARTS_NAME = Data_Inventory.Element("PARTS_NAME").Value, _
.PARTS_SD = CDbl(Data_Inventory.Element("PARTS_SD").Value), _
.PARTS_STOCK = Data_Inventory.Element("PARTS_STOCK").Value, _
.PARTS_TYPE = Data_Inventory.Element("PARTS_TYPE").Value}).ToList()
My question is, how can I handle the NULL value, and assing a 0 to that element?
So far, no luck!
In the code, I tried the IF clause, but doesn't work at all...
the .PARTS_LENGTH element is defined as DOUBLE and is the value I'd like to make 0 if it's NULL.
Any help is much appreciated in advance.
Code:
Select New Class_Data_Inventory With {.PARTS_AC = CDbl(Data_Inventory.Element("PARTS_AC").Value), _
.PARTS_COMPANY = Data_Inventory.Element("PARTS_COMPANY").Value, _
.PARTS_DIAM = CDbl(Data_Inventory.Element("PARTS_DIAM").Value), _
[B][COLOR="Red"].PARTS_LENGTH = CDbl(If(Data_Inventory.Element("PARTS_LENGTH") Is Nothing, "0", Data_Inventory.Element("PARTS_LENGTH").Value)), [/COLOR][/B]_
.PARTS_NAME = Data_Inventory.Element("PARTS_NAME").Value, _
.PARTS_SD = CDbl(Data_Inventory.Element("PARTS_SD").Value), _
.PARTS_STOCK = Data_Inventory.Element("PARTS_STOCK").Value, _
.PARTS_TYPE = Data_Inventory.Element("PARTS_TYPE").Value}).ToList()
Does taking the .Value off the line fix it?
And swap the order of the If: If...Expression...When true...When false
So for your example it would be:
If...Is nothing...Then 0...Else Value
My VB.Net is a tad rusty
Dave
Use HasElement
Presumably you're using an xelement object, if so check out HasElement
CDbl(If(Data_Inventory.HasElement("PARTS_LENGTH"), Data_Inventory.Element("PARTS_LENGTH").Value, "0")), _
Also I'd recommend putting the logic in it's in it's own method
antonydenyer said:
Presumably you're using an xelement object, if so check out HasElement
CDbl(If(Data_Inventory.HasElement("PARTS_LENGTH"), Data_Inventory.Element("PARTS_LENGTH").Value, "0")), _
Also I'd recommend putting the logic in it's in it's own method
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Thanks for the answer but it doesn't work.
.HasElements is not part of an XElement.
If you have any other idea, please let me know.
Hi,
Have you tried:
.PARTS_LENGTH = If(Data_Inventory.Elements("PARTS_LENGTH").Any(), Data_Inventory.Element("PARTS_LENGTH").Value, "0")
Excuse the VB.net it's been a while
Hope it helps.
Kong
Hi, thanks for the answer!
Will try it out and let you know how it's working.
Is there a way to convert a IR pattern from a Android ~4.4.2 to 4.4.3 compatible pattern.
Here is a example how they look like
Code:
private static final int SAMPLE_FREQ = 38400;
private static final int[] IR_SIGNAL_PULSE_COUNT = {171,171,22,64,22,64,22,64,22,21,22,21,22,21,22,21,22,21,22,64,22,64,22,64,22,21,22,21,22,21,22,21,22,21,22,21,22,21,22,64,22,21,22,21,22,21,22,21,22,21,22,64,22,64,22,21,22,64,22,64,22,64,22,64,22,64,22,876};
private static final int[] IR_SIGNAL_TIME_LENGTH = {4499,4499,578,1683,578,1683,578,1683,578,552,578,552,578,552,578,552,578,552,578,1683,578,1683,578,1683,578,552,578,552,578,552,578,552,578,552,578,552,578,552,578,1683,578,552,578,552,578,552,578,552,578,552,578,1683,578,1683,578,552,578,1683,578,1683,578,1683,578,1683,578,1683,578,23047};
I'm getting a close but not perfect result with this..
Code:
private int[] toCompIR(IrDataCompat data){
int inUs = 1000000/data.getFrequency();
int[] frame = data.getFrame();
int[] arrayOfInt = new int[-1 + frame.length];
for (int j = 1; j < frame.length; j++)
arrayOfInt[(j - 1)] = frame[(j - 1)] * inUs;
return arrayOfInt;
}