C# Discussion Boards - CodeProject

Translating Win32API and their Structs problems

BoxenBiene13-Oct-04 10:42

13-Oct-04 10:42

Hi all,

I want to use the Windows API "DeviceIOControl" for reading the TOC of a inserted CDRom.
Therefor I need some structs with wich i have a lot off problems to translate.

Is anybody able to help me?

The API "DeviceIOControl":

BOOL DeviceIoControl(
HANDLE hDevice,
DWORD dwIoControlCode,
LPVOID lpInBuffer,
DWORD nInBufferSize,
LPVOID lpOutBuffer,
DWORD nOutBufferSize,
LPDWORD lpBytesReturned,
LPOVERLAPPED lpOverlapped
);

The following structs are needed:

typedef struct _CDROM_TOC
{
UCHAR Length[2];
UCHAR FirstTrack;
UCHAR LastTrack;
TRACK_DATA TrackData[MAXIMUM_NUMBER_TRACKS];
} CDROM_TOC, *PCDROM_TOC;

typedef struct _TRACK_DATA
{
UCHAR Reserved;
UCHAR Control : 4;
UCHAR Adr : 4;
UCHAR TrackNumber;
UCHAR Reserved1;
UCHAR Address[4];
} TRACK_DATA, *PTRACK_DATA;

typedef struct __RAW_READ_INFO
{
LARGE_INTEGER DiskOffset;
ULONG SectorCount;
TRACK_MODE_TYPE TrackMode;
} RAW_READ_INFO, *PRAW_READ_INFO;

Or has anybody a better thought?

Thanks in advance

BB

Re: Translating Win32API and their Structs problems

yoaz14-Oct-04 7:10

yoaz

14-Oct-04 7:10

you surely tried translating all pointers to

IntPtr<code>, handles words to int's, UCHAR to byte, etc.? What specifically is the problem? <br />
<br />
there are no facts, only interpretations

Re: Translating Win32API and their Structs problems

BoxenBiene14-Oct-04 8:01

BoxenBiene

14-Oct-04 8:01

Hi,

You detect the main problem that I have. In the Help for examaple I have found, that the meaning for UCHAR is Unsigned CHAR. That' what I don't understand.

So if you are able to complete the list you have started or you can tell me where to find the exact translation I was delited.

Thanks in advance

BB

Re: Translating Win32API and their Structs problems

yoaz14-Oct-04 8:41

yoaz

14-Oct-04 8:41

hope this helps:

struct _CDROM_TOC
{
	byte[] Length = new byte[2];
	byte FirstTrack;
	byte LastTrack;
	TRACK_DATA TrackData[MAXIMUM_NUMBER_TRACKS];
}

struct TRACK_DATA 
{
	byte Reserved;
	byte Control;
	byte Adr;
	byte TrackNumber;
	byte Reserved1;
	byte Address[4];
} 

struct RAW_READ_INFO 
{
	Int64 DiskOffset;
	UInt32 SectorCount;
	TRACK_MODE_TYPE TrackMode;
}

I'm not sure that LARGE_INT translated to Int64 but it should, otherwise define a struct to hold it (check it out at MSDN). You also didn't specify what is TRACK_MODE_TYPE structure.
Try checking out MSDN documentation on the Marshal class

there are no facts, only interpretations

ListView Add Data

mfcuser13-Oct-04 10:06

mfcuser

13-Oct-04 10:06

I have my listview where I plot some data. I want to show the data to a table, so I am using listview. I do have problem using the subitem function. I can show my x data to the fist column, however I am having problem to show the y data to the next column

here is my code

<br />
private void button1_Click(object sender, System.EventArgs e)<br />
		{<br />
			double[] dData  = new double[200];<br />
			double[] dData2 = new double[200];<br />
<br />
			for(int i=0;i<200;i++)<br />
			{<br />
				dData[i]  = Math.Sin(0.09*i);<br />
				dData2[i] = Math.Cos(0.1*i);<br />
				listView1.Items.Add(i.ToString()); //show the x data to the fist colunm however I couldn't find a way to show the sine and the cosine to the next colunm<br />
				<br />
			}<br />
			waveformPlot1.PlotY(dData);<br />
			waveformPlot2.PlotY(dData2);<br />
		}<br />

so my output looks like that
col 1 col 2 col 3
0 blank blakk
1 blank blank

show how can I show subitem in the listview

Re: ListView Add Data

Anonymous13-Oct-04 10:55

Anonymous

13-Oct-04 10:55

You have to use ListViewItem Class. First you need to add the columns to ListViewItem and add the ListViewItem to the ListView Control.

Try this...

private void button1_Click(object sender, System.EventArgs e)

{

double[] dData = new double[200];

double[] dData2 = new double[200];

ListViewItem newItem = null;

for(int i=0;i<200;i++)

{

dData[i] = Math.Sin(0.09*i);

dData2[i] = Math.Cos(0.1*i);

newItem= new ListViewItem();

newItem.SubItems.Add(i.ToString());

newItem.SubItems.Add(dData[i].ToString());

newItem.SubItems.Add(dData2[i].ToString());

this.listView1.Items.Add(newItem);

}

Cheers,
jagan

Re: ListView Add Data

mfcuser13-Oct-04 11:28

mfcuser

13-Oct-04 11:28

I have tried it over and got it right;

this was the only line that I missed

this.listView1.Items.Add(newItem);

Re: ListView Add Data

mfcuser13-Oct-04 11:43

mfcuser

13-Oct-04 11:43

also the first column is blank. The index which is i doesn't show on the fist column

Re: ListView Add Data

jagan7914-Oct-04 7:01

jagan79

14-Oct-04 7:01

Hmmmm thats interesting... Anyway this is not right way but try this..

private void button1_Click(object sender, System.EventArgs e)
{
double[] dData = new double[200];
double[] dData2 = new double[200];
ListViewItem newItem = null;
for(int i=0;i<200;i++)
{
dData[i] = Math.Sin(0.09*i);
dData2[i] = Math.Cos(0.1*i);
newItem= new ListViewItem(i.ToString());
newItem.SubItems[1].Text = dData[i].ToString();
newItem.SubItems[2].Text = dData2[i].ToString();
newItem.SubItems.Add(dData[i].ToString());
newItem.SubItems.Add(dData2[i].ToString());
this.listView1.Items.Add(newItem);
}

Cheers,
Jagan

Re: ListView Add Data

mfcuser14-Oct-04 8:29

mfcuser

14-Oct-04 8:29

I received the following error on that line

newItem.SubItems[1].Text = dData[i].ToString();

An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in system.windows.forms.dll

Additional information: Specified argument was out of the range of valid values.

Re: ListView Add Data

mfcuser14-Oct-04 8:32

mfcuser

14-Oct-04 8:32

However by removing the two lines, the rest of the code works fine. This is the one that works

<br />
private void button1_Click(object sender, System.EventArgs e)<br />
		{<br />
			double[] dData  = new double[200];<br />
			double[] dData2 = new double[200];<br />
			ListViewItem newItem = null;<br />
<br />
			for(int i=0;i<200;i++)<br />
			{<br />
				dData[i]  = Math.Sin(0.09*i);<br />
				dData2[i] = Math.Cos(0.1*i);<br />
				newItem= new ListViewItem(i.ToString());<br />
				newItem.SubItems.Add(dData[i].ToString());<br />
				newItem.SubItems.Add(dData2[i].ToString());<br />
				this.listView1.Items.Add(newItem);<br />
			}<br />
			waveformPlot1.PlotY(dData);<br />
			waveformPlot2.PlotY(dData2);<br />
		}<br />

Re: ListView Add Data

jagan7914-Oct-04 12:39

jagan79

14-Oct-04 12:39

Actually i had commented those two lines . However while posting i had mistakenly uncommented those D'Oh! | :doh:

. Sorry for the confusion. Frown | :(

FileSharing violation.

pat27088113-Oct-04 9:43

pat270881

13-Oct-04 9:43

Hello,

I am sure that I have open only one connection to my SQL Server CE Database but I worked then with another project which also has opened a connection to the same SQL Server CE Database file, but I closed this connection. Now when I want to execute my previous project the File Sharing violation. A different preocess might be using the file. How can I ensure that no more process will use the file?? I also looked in the settings but there is nothing more.

patrick

Owner drawn combobox

Roland F13-Oct-04 9:22

Roland F

13-Oct-04 9:22

Is it possible to draw the drop down list of a combobox a other position?

Is it possible to draw the drop down list to the right side of the combobox?

If possible, what i have to do?

Thanks, Roland

Getting thumbnails of webpages

yyylny13-Oct-04 9:09

yyylny

13-Oct-04 9:09

Hello,
I want to my program to capture the a webpage as an image and show it to the user. Can you please tell me how to do it? I know I should use a WebBrowser control but how can I capture the webpage?

Thanks in advance

DirectX control library

Mark Tutt13-Oct-04 8:42

Mark Tutt

13-Oct-04 8:42

I've got a client who is driving me nuts! They want the user interface for their application to look '24th century' (Trek fan) and have read enough to believe that DirectX is the way to give them a totally unique UI.

I've explained that all the usefullness of the standard Windows controls isn't available when you're using DirectX, but they're determined that their application will look like no other.

From the research and googling I've done it appears that there is some information available about this, but not a lot. Has anyone out there attempted anything like this, or have a pointer to a project by chance?

Or, do I triple my price to cover the effort and start from scratch?

Re: DirectX control library

Steve Maier13-Oct-04 8:55

Steve Maier

13-Oct-04 8:55

Actually if you look at the Managed DX samples in the new DirectX SDK there are some standard contrls that can be custom drawn that really do look cool. I think you might even get some/most of the functionality of that control, too.

Of course you could also do the same with all custom drawn controls and just forget about using DX.

Steve Maier, MCSD MCAD

Re: DirectX control library

Nick Parker13-Oct-04 8:55

Nick Parker

13-Oct-04 8:55

Read this[^].

- Nick Parker
My Blog | My Articles

Re: DirectX control library

Mark Tutt13-Oct-04 9:30

Mark Tutt

13-Oct-04 9:30

Excellent! Now to decide if I jack my price for the learning curve or eat it because this will be fun to play with.... Wink | ;-)

Need help : AxMSComm control

to_hshen13-Oct-04 7:06

to_hshen

13-Oct-04 7:06

Hello!

I need help.

I have impoted the AxMS Confused | :confused:

Comm Control 6 in MS Visual Studio .net 2003 and am using the control in C#. I tried to open ComPort #4 to receive GPS data through USB. However, I couldnt' open it, everytime, it gave me the following exception:

System.RunTime.InteropServices.ComException(0x800A1F45): HRESULT 0x800A1F45

Could somebody kind enough to help me solve this problem? Any suggestion would be appreciated!

Regards,
Stephen

just a thought

yoaz14-Oct-04 6:49

yoaz

14-Oct-04 6:49

i once (upon a time) had troubled with the comm control. are u sure it can be used for USB connections? Anyway, we used to troubleshoot the comm ports using HyperTerminal (an old unfriendly thing u can find in programs-accessories-communication), and u need to know what to send through this com port.

there are no facts, only interpretations

object needs an 'indexer'

Tim Atkins13-Oct-04 7:03

Tim Atkins

13-Oct-04 7:03

I've successfully invoked a COM method, which returns a ref to an object:

object oNames ;
...
axGTVX1.QueryAvailableList( ref oNames );

The object is an array of strings. In the VS.Net debug watch window, I can see the array and its values:

- oNames {System.Array} System.Object
[0] "Pole" string
[1] "Substation" string
...

However, I can't access it as an array (if I try to watch oNames[0], the message 'object needs an indexer' appears). I've tried various approaches to cast or index this object, to no avail. THIS SHOULD BE SIMPLE.

Tim

Re: object needs an 'indexer'

J4amieC13-Oct-04 7:55

J4amieC

13-Oct-04 7:55

<br />
string [] aNames = ((string[])oNames);<br />

Re: object needs an 'indexer'

Tim Atkins13-Oct-04 8:03

Tim Atkins

13-Oct-04 8:03

I tried that, and got a runtime error at that line:

System.InvalidCastException: Specified cast is not valid.

Thanks for the response.

Re: object needs an 'indexer'

J4amieC13-Oct-04 9:21

J4amieC

13-Oct-04 9:21

Tim Atkins wrote:
System.InvalidCastException: Specified cast is not valid.

I'll admit I dont know the library you are dealing with, but the value being ref'ed out of that method isnt a string array if you are getting that error from that line of code.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.