C# Discussion Boards - CodeProject

Andrew Timmins27-Feb-09 18:46

27-Feb-09 18:46

Hello,
Can someone help me understand how to read a packet?
I believe i have gathered all the necessary bytes but am having a hard time reading the data from the packet.

I thought I could attach the pdf here, but instead i will provide a snippet and maybe i can move on from there.
Here are the first 10 bytes as described in the document I have.

Unique Header Bytes
Byte1: Header Byte 0xFE
Byte2: Header Byte 0xFF
Byte3: Header Byte 0x03

The value of “Volt” must be divided by ten. This provides one
decimal place resolution.
Byte4: Volt Hi Byte
Byte5: Volt Low Byte

CH1 Absolute Watt-Second counter.
This 5-byte counter increments with energy flowing in either direction (consuming or producing).
Byte6: CH1 W-S Byte1 (LSB)
Byte7: CH1 W-S Byte2
Byte8: CH1 W-S Byte3
Byte9: CH1 W-S Byte4
Byte10: CH1 W-S Byte5 (MSB)

I tried the following code to get the VOLTS, but its not working.
private void ProcessData(SocketPacket packet)
{

byte[] buffer = new byte[packet.ms.Length];
//packet.ms.Position = 0;
packet.ms.Seek(3, SeekOrigin.Begin);

packet.ms.Read(buffer,0,2);
int data = BitConverter.ToInt32(buffer, 0);

}

Can anyone offer some ideas?

Drew

Re: Reading a Packet assistance

Jimmanuel28-Feb-09 1:43

Jimmanuel

28-Feb-09 1:43

without actaully testing anything, I believe this should work:

int voltsAsInt = (packet.ms[4] << 8) | (packet.ms[5]);
double actualVolts = voltsAsInt / 10;

To Create Crystal Reports With Dynamic Values

aashish.saalvi27-Feb-09 18:46

aashish.saalvi

27-Feb-09 18:46

hi I am creating an C# Application in which i am accepting values from the user for ex an ID. Depending on that id value i want to generate reports. the problem is that the ID is in many tables and i want data from all that table. can anybody help me out of this.
Thanks in advance.

C# drag and drop from Treeview to Listview

AlCsharp27-Feb-09 18:01

AlCsharp

27-Feb-09 18:01

Hi...

Could anyone show me the C# code to Drag and Drop from a Treeview to a Listview?

Thank You in advance...

Re: C# drag and drop from Treeview to Listview

Calin Tatar28-Feb-09 1:02

Calin Tatar

28-Feb-09 1:02

First set AllowDrop = true
For treeview, handle ItemDrag event.
For listview, handle DragOver, DragEnter and DragDrop events.

For more details, have a look here[^]

Calin

Any good .net obfuscator ?

Kim061827-Feb-09 15:11

Kim0618

27-Feb-09 15:11

Hi,

I want to source for .net obfuscators. Any recommendations ?

Thanks

Re: Any good .net obfuscator ?

Eddy Vluggen27-Feb-09 23:05

Eddy Vluggen

27-Feb-09 23:05

Your post is gray because that question rolls in every two or three weeks. Here are some of the standard replies;

DotFuscator[^] - if you got Visual Studio, then you'll also have the community edition of this obfuscator. It's located in the "Visual Studio Tools"-folder in the start-menu.

Those are in competition with the Aspose[^] obfuscator. SkaterLight[^] is a less-known alternative, just like Eazfuscator[^].

Want to write your own? There's an article[^] on CP that explains how to obfuscate PHP code. There's also an open source project on CodePlex[^] to obfuscate .NET code.

There's a discussion on the usefullness here[^], and a very good alternative to obfuscating a lot can be found in the last paragraph of this[^] post.

Enjoy Smile | :)

I are troll Smile | :)

the problem of set the default page for html help maker (.chm)

Seraph_summer27-Feb-09 10:43

Seraph_summer

27-Feb-09 10:43

I am using html help workshop to create the .chm for one c# application.

I try to set the default page by change "project options" and set "default file", but it does not work.

when I open the .chm and it always display "This program cannot display the webpage" on the first page. it does not display the default page I set. I don't know the reason.

by the way, except this problem, .chm works fine.

anyone has used html help workshop and please give me one hint for it.

thanks.

Directory of the App file ?

Mohammad Dayyan27-Feb-09 10:01

Mohammad Dayyan

27-Feb-09 10:01

Hi all.
As far as I know with Environment.CurrentDirectory we can get the current working directory.
But I'm gonna get the directory of my exe file (of my application), because sometimes the current directory is different with path of my application.

Could you guide me ?
Thanks in advance.

Re: Directory of the App file ?

Calin Tatar27-Feb-09 10:02

Calin Tatar

27-Feb-09 10:02

use Application.StartupPath.

Calin

Re: Directory of the App file ?

Mohammad Dayyan27-Feb-09 10:05

Mohammad Dayyan

27-Feb-09 10:05

Wow, very quick.
Thanks a lot Calin Tatar Thumbs Up | :thumbsup:

Usb control channel and buzzer

thomaxz.tc27-Feb-09 8:52

thomaxz.tc

27-Feb-09 8:52

I have buy'ed a set of buzz! wireless buzzer, which should work with pc also, and windows regonize them as a twenty button joystick, but no button press is regonized, as far i have read it should first recieve a message on the controlchannel, before working. Heres my problem i can't se the find any information about how to send a control signal to joystick.

Thomaxz

Re: Usb control channel and buzzer

Curtis Schlak.27-Feb-09 11:43

Curtis Schlak.

27-Feb-09 11:43

I don't know how much help it will be, but Pedram Amini wrote an in-depth article on reverse engineering a USB device's proprietary protocol at Python Interfacing a USB Missile Launcher[^]. Perhaps his (hers?) process will help you reverse engineer the Buzz! Wireless Buzzer.

"we must lose precision to make significant statements about complex systems."
-deKorvin on uncertainty

Re: Usb control channel and buzzer

thomaxz.tc28-Feb-09 4:09

thomaxz.tc

28-Feb-09 4:09

Althroug theres i no software for pc, i can anaylse, i find a solution, in the article you link thers is a link to http://www.pcausa.com/Utilities/UsbSnoop/default.htm which i used to get vendor and procut id, with that i used the http://www.codeproject.com/KB/cs/USB_HID.aspx to send a recivedata and foudn it work almost as described http://www.vsj.co.uk/articles/display.asp?id=600 but it has an power safe function, which menas one of the lamp should be set on, before it will send any data.

Thank you very much for the Help

Thomaxz

Problem In Middle Tire

naim khan27-Feb-09 8:19

naim khan

27-Feb-09 8:19

Hello sir.

I have Big Problem in Middle Tire . what is this and why we used in .NET.
what is the baniftes of it. if u have ay example related to Midle Tire . then plz send me . my Email id is (khan.naim786@yahoo.com).

Re: Problem In Middle Tire

Colin Angus Mackay27-Feb-09 10:19

Colin Angus Mackay

27-Feb-09 10:19

naim khan wrote:
I have Big Problem in Middle Tire

I've always thought that Reliant Robins[^] are very strange cars and often they have a problem with their middle tire - well, the whole of the middle wheel.

Seriously now, as far as I can see you do not have a problem with your middle tier because it would appear that you don't have one. You have a problem with not having one.

naim khan wrote:
what is this and why we used in .NET.

It is not just .NET it is any software development. You might want to read multi-tier architecture[^]

naim khan wrote:
my Email id is

Keep it on the forum. If you keep it on the forum other people benefit.

*Developer Day Scotland - Free community conference
*Colin Angus Mackay's Blog
*Latest Scottish Developers Newsletter

Vogon Building and Loan advise that your planet is at risk if you do not keep up repayments on any mortgage secured upon it. Remember that the force of gravity can go up as well as down.

Re: Problem In Middle Tire

Sava Savanovic27-Feb-09 22:47

Sava Savanovic

27-Feb-09 22:47

Colin Angus Mackay wrote:
very strange cars

Well, one got Del Boy and Rodney through all the series.

Ko seje so, nicu mu skakavci.

Re: Problem In Middle Tire

Christian Graus27-Feb-09 10:40

Christian Graus

27-Feb-09 10:40

I would recommend running your posts through a spell checker, although it wouldn't have fixed 'tire', it would have fixed 'baniftes', and other stuff that makes this hard to read.

Beyond that, it's plain you have absolutely no idea what you're doing. So, buy some books and read them.

Christian Graus

Driven to the arms of OSX by Vista.

Getting value out of DataGrid while maintaining original Type? [modified]

bbranded27-Feb-09 7:59

bbranded

27-Feb-09 7:59

Hello,

I'm interested in being able to pull the value of a cell in a selected row as the Type that the value was originally added to the DataGrid.

The data values are hWnds of all current process threads, which is of type System.IntPtr for the purpose of ShowWindow().

However, when I attempt to use the .Value with ShowWindow() as follows:

ShowWindow(dataGrid["hWndValue", dataGrid.CurrentRow.Index].Value, 1);

the call fails citing: cannot convert object to System.IntPtr.

I'm wondering if there is:
1) a way to convert the .ToString() value of dataGrid["hWndValue", dataGrid.CurrentRow.Index].Value to System.IntPtr?
2) a way to maintain the type of the data that was placed into the cell in the DataGrid?

Obviously, I'd rather not "be sloppy" and convert from a string to a IntPtr, but it'll work.

Any input is appreciated.

Thanks very much,

Matt Brown Big Grin | :-D

[edit]

Although the above may be useful for me or others in the future; I was able to read the values into both a dictionary and the datagrid row, maintaining the type and allowing a lookup.

//"root" namespace, therefore the ThreadHandles dictionary is valid throughput the Form class
Dictionary<string,> ThreadHandles = new Dictionary<string,>();


               try
                {
                    ThreadHandles.Add(sb.ToString(), hWnd);
                    dataGrid.Rows.Add(sb.ToString(), hWnd);
                }
                catch
                {
                    dataGrid.Rows.Add(sb.ToString(), hWnd);
                }

[SOLUTION]

Thanks howlettt for the solution!

ShowWindow((System.IntPtr)(dataGrid["hWndValue", dataGrid.CurrentRow.Index].Value), 1);

modified on Friday, February 27, 2009 3:08 PM

Re: Getting value out of DataGrid while maintaining original Type?

howlettt27-Feb-09 8:59

howlettt

27-Feb-09 8:59

ShowWindow(dataGrid["hWndValue", (System.IntPtr)dataGrid.CurrentRow.Index].Value, 1);

Should work

Re: Getting value out of DataGrid while maintaining original Type?

bbranded27-Feb-09 9:07

bbranded

27-Feb-09 9:07

Wow, cool. Can I convert any type to any other type with the same syntax type thing? Awesome!!!

for others: the proper syntax for what I'm trying to do is:
ShowWindow((System.IntPtr)(dataGrid["hWndValue", dataGrid.CurrentRow.Index].Value), 1);

Re: Getting value out of DataGrid while maintaining original Type?

Dan Neely27-Feb-09 10:31

Dan Neely

27-Feb-09 10:31

C# requires explicit casting more often than C/C++, but in general as long as it logically makes sense to do so you're just as free to make casts.

Today's lesson is brought to you by the word "niggardly". Remember kids, don't attribute to racism what can be explained by Scandinavian language roots.
-- Robert Royall

Re: Getting value out of DataGrid while maintaining original Type?

howlettt27-Feb-09 14:01

howlettt

27-Feb-09 14:01

http://msdn.microsoft.com/en-us/library/ms173105.aspx[^]

DIV overflow attribute in IE Mobile 6.0

dwg198627-Feb-09 7:45

dwg1986

27-Feb-09 7:45

Dear holders of hope,

Does anybody know if IE Mobile 6.0 supports the DIV's overflow:auto attribute? Everything works fine in a normal desktop browser.. but IE mobile does not keep the div's fixed size, and no scrollbars are rendered.

I would greatly appreciate any one with either a solution or a workaround as to how to make a fixed contentholder (such as a DIV) whose contents' size exceeds its own size.. and thus creates scrollbars in IE Mobile 6.0.

Thanks in advance. I've been tearing my hair at this for hours :/

DWG

Numeric formatting question

bscaer27-Feb-09 6:58

bscaer

27-Feb-09 6:58

In the following String.Format call it will format a number to 6 zero-padded digits, prepend the plus or minus sign and then pad with a space on the left to 8 characters:

String.Format({0,8:+000000;-000000}, num); // result is of the form " +002009"

What format string can I use to format a number to 7 space-padded digits and prepend the plus or minus sign before the spaces? I am looking for something like

"+ 2009"

Beth

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