Mobile

[iphone question] how can i use double pointer like *[10]

buffering838-Mar-10 13:16

buffering83

8-Mar-10 13:16

@interface testTable2ViewController : UIViewController
{
NSMutableArray **indexStore;
}

@property(nonatomic , retain) NSMutableArray **indexStore;

@end

@implementation testTable2ViewController
@synthesize indexStore;

- (void)viewDidLoad
{

for (NSInteger i = 0; i <10; i++)
{
indexStore[i] = [[NSMutableArray alloc]init];
}//for
}

@end

//////////////////////////////////////////////////////

but indexStore[i] = [[NSMutableArray alloc]init]; can't work
Error Message is EXC_BAD_ACCESS...

why it is not working?

hi

My english is a little.
anyway, nice to meet you~~
and give me your advice anytime~

Re: [iphone question] how can i use double pointer like *[10]

Stuart Dootson7-Apr-10 23:38

Stuart Dootson

7-Apr-10 23:38

You never allocate space for indexStore. If you know it'll always have 10 elements, declare it as

NSMutableArray *indexStore[10];

and

@property(nonatomic , retain) NSMutableArray *indexStore[10];

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CodeProject MVP for 2010 - who'd'a thunk it!

Fastest drawing with WinMo 6

Matt Cavanagh8-Mar-10 4:40

Matt Cavanagh

8-Mar-10 4:40

Hi, i want to develop a small game for windows mobile with C#.
What is the fastest 2D drawing API? Im very used to XNA, so is there anything that I can use that's similar? I heard GDI is pretty slow.

Thanks

Strive to be humble enough to take advice, and confident enough to do something about it.

Re: Fastest drawing with WinMo 6

Joel Ivory Johnson10-Mar-10 7:32

Joel Ivory Johnson

10-Mar-10 7:32

If you are drawing sprites then you should use DirectDraw. Unfortunatly DirectDraw isn't directly exposed to .Net developers. But there's another CodeProject article where some one declared all of the imports necessary to begin using DirectDraw from the .Net Compact Framework.

Joel Ivory Johnson

How can I use CeRunAppAtTime for a thread

anuhoho8-Mar-10 0:03

Re: How can I use CeRunAppAtTime for a thread

8-Mar-10 0:03

Hi

I want a thread to start after 15/20 min For that can I use CeRunAppAtTime() .If yes can anyone provide me ways to do that.

Suppose this is my thread

void main()
{
..
..
g_handle= ::CreateThread( NULL, 0,MyThread, NULL, 0, 0);
....

}

Now I want This MyThread to start after 15/20 min can I do that

Thanks in advance

Joel Ivory Johnson10-Mar-10 7:35

Joel Ivory Johnson

10-Mar-10 7:35

Start your thread immediatly. When the thread starts have it to create an unnamed event. After creating the event the thread can call CeRunAppAtTime and pass the event handle. Then call the Wait function using the even't handle as athe parameter. The thread will be blocked from running until the event gets triggered.

For information on using CeRunAppAtTime with an event handle please see my comment at the bottom of This MSDN Documentation page[^]

Joel Ivory Johnson

pocket pc datagrid in vb.net

ejaz_pk7-Mar-10 22:44

ejaz_pk

7-Mar-10 22:44

I am using datagrid in my vb.net (pocket pc) application.

I am using the following code to set the tablestyle to the datagrid to adjust the column width

<pre>

Dim ts As DataGridTableStyle = New DataGridTableStyle

ts.MappingName = "Products"

Dim Product As DataGridTextBoxColumn = New DataGridTextBoxColumn
Product.MappingName = "Product"
Product.HeaderText = "Product"
Product.Width = 130
ts.GridColumnStyles.Add(Product)

Dim Qty As DataGridTextBoxColumn = New DataGridTextBoxColumn
Qty.MappingName = "Quantity"
Qty.HeaderText = "Quantity"

Qty.Width = 75
ts.GridColumnStyles.Add(Qty)

Me.DataGrid1.TableStyles.Add(ts)

Me.DataGrid1.TableStyles(0).GridColumnStyles(0).Width = 100

</pre>

After binding the datagrid I use this code to set the datagridtablestyle but it only show my one column me nothing even it does not return the values in the datagrid with original tablestyle. It show only row header in the grid but does not show the columns.

Any idea how I can solve this problem????

Thanks In advance

How to use a timer in a dll

anuhoho7-Mar-10 18:11

Re: How to use a timer in a dll

7-Mar-10 18:11

Can anyone suggest a way as to how i can use a timer in a dll.How we can use windows messages or settimer .

Thanks in advance!!!!

KingsGambit7-Mar-10 19:22

KingsGambit

7-Mar-10 19:22

I think you can use SetTimer() with a timer proc. http://msdn.microsoft.com/en-us/library/ms644906(VS.85).aspx[^]

Re: How to use a timer in a dll

anuhoho7-Mar-10 20:22

Re: How to use a timer in a dll

7-Mar-10 20:22

SetTimer requires a message pump but my dll doesnt have any. So i cant use it. I need an alternative of Sleep() so that i can use it

Alain Rist7-Mar-10 21:39

Alain Rist

7-Mar-10 21:39

The practical answser to your question and the two previous ones is at http://windowsmobiledn.com/qa-how-can-i-register-my-program-to-run-at-a-certain-time/[^].
cheers,
AR

When the wise (person) points at the moon the fool looks at the finger (Chinese proverb)

How can i attach a dll in the start up

anuhoho7-Mar-10 17:38

Re: How can i attach a dll in the start up

7-Mar-10 17:38

Hi

I have a small query. I have a dll and I want it to start as soon as my device reboots. Is there any way of doing it. How about putting it in the windows start up, so that whenever my device will start my dll will also start. Can anyone provide me with some logic.

Thanks in advance!!!!

KingsGambit7-Mar-10 19:25

KingsGambit

7-Mar-10 19:25

You cannot just start a DLL. DLL requires a process to load it. So, may be you can write an application which loads your DLL and calls it's functions. And configure that application to auto-start after booting.

Take a loot at following article:
Automatically Starting Your Application on Windows Mobile[^]

How to program sleep in windows mobile

anuhoho5-Mar-10 1:26

Re: How to program sleep in windows mobile

5-Mar-10 1:26

Hi I have an application in which i have a thread which is expected to do an activity after half hour. SO i used sleep() but while testing(in one scenario) i saw that when the device go in the sleep mode then the time taking to do the activity for that thread is more then the desired time of 30 mins. That is my sleep() is not working accurately when my device goes in the sleep mode. So how can i programatically make a 30 min delay without using any info from the device OS(like gettickcount etc).

My application works fine if I keep the device awake i.e., if i dont allow it to go to the sleep mode forcefully. But the problem arises when it goes to the sleep mode. The time taking is much more ...

Is there any remedy for that.

Thanks in advance!!!

Joel Ivory Johnson10-Mar-10 7:38

Joel Ivory Johnson

10-Mar-10 7:38

I just answered this above, but for the sake of some one else that reads this question you shouldn't use Sleep to schedule a thread to run. Instead you must use CeRunAppAtTime. For information on using this function with an event you can see the MSDN documentation page ( here[^]) or you could see the CodeProject.com article I wrote on scheduling a program to automatically start (which is also applicable to threads ig you use the info at the above link) from here[^].

Joel Ivory Johnson

Some problen in converting char * to LPCWSTR

anuhoho4-Mar-10 19:56

4-Mar-10 19:56

Hi I am facing some problem in the following code .Actually I am not able to print the full data present in my LPCWSTR .Here is the code

....
SYSTEMTIME current_time;.

GetLocalTime(¤t_time);

char *str =new char[2000];

sprintf(str, "%4d/%2d/%2d  %2d:%2d:%2d:%2d\n", current_time.wYear,current_time.wMonth,current_time.wDay,current_time.wHour,current_time.wMinute,current_time.wSecond,current_time.wMilliseconds);  

int i;

wchar_t *pwc = (wchar_t *)malloc( sizeof( wchar_t ));

 i = mbstowcs( pwc, str, sizeof(str) );

 WriteToLogFile(pwc);

delete [] str;

In the log file I just want to print the year date and time but only the year gets printed. Here is the log file

void WriteToLogFile(LPCWSTR strData)
{
	try
	{ 
		ofstream  myfile;		
	    myfile.open("\\MyData\\Log.txt",ios::app);

				
	    int iSize = WideCharToMultiByte(CP_ACP,0,strData, -1, NULL, 0, NULL, NULL );

	    char* lpNarrow = new char[iSize];

            lpNarrow[0] = 0;

	    iSize= WideCharToMultiByte(CP_ACP, 0,strData, -1, lpNarrow, iSize, NULL, NULL );

		

	    myfile<<lpNarrow<<endl;
	
            delete [] lpNarrow;

           myfile.close();		
	}
	catch(...)
	{
	}
}

Any help on this..

Thanks in advance

Covean4-Mar-10 20:47

Covean

4-Mar-10 20:47

anuhoho wrote:
wchar_t *pwc = (wchar_t *)malloc( sizeof( wchar_t ));

Maybe you should allocate more than 2 bytes for your string. Poke tongue | ;-P

Greetings
Covean

anuhoho4-Mar-10 22:31

4-Mar-10 22:31

SO what you suggest seeing the above code,.what should i give

Covean4-Mar-10 21:52

Covean

4-Mar-10 21:52

In addition to my first post this

anuhoho wrote:
i = mbstowcs( pwc, str, sizeof(str) );

copies only 4(32bit)/8(64bit) chars to your 2 wchar_t long string, because the call sizeof(str) returns the length of an char* and not the length of the string.

Greetings
Covean

anuhoho4-Mar-10 22:33

4-Mar-10 22:33

what you suggest then

Covean4-Mar-10 22:55

Covean

4-Mar-10 22:55

Something like this:

int nStrLen = strlen(str);
wchar_t *pwc = (wchar_t *)malloc( sizeof( wchar_t) * (nStrLen + 1));
i = mbstowcs( pwc, str, nStrLen );

Hope this work, couldn't test it.

Greetings
Covean

anuhoho5-Mar-10 1:20