Re: I want to write freehand text in picture box using USB Pen : in pen mode - C# Discussion Boards

Eddy Vluggen26-Jul-12 6:40

26-Jul-12 6:40

glennPattonWork wrote:
Hey-Ho I'm Back it appears to .NET2.0RunTime throwing an error 5000 on both machines which according to MSDN "This problem occurs because the default policy for unhandled exceptions has changed in the .NET Framework 2.0. By default, the policy for unhandled exceptions is to end the process." Prior to .Net2.0 it ignores." which is helpful

Means that since .NET 2.0 the application dies if you have an unhandled exception.

glennPattonWork wrote:
There does seem to be a bit on the .Net2.0 frame work not being installed properly, seems like a good time to do an update on both PC's one takes about 25 mins to boot and the other is a test laptop that dies if look at it wrong!

Did the repair help?

Bastard Programmer from Hell Suspicious | :suss:

if you can't read my code, try converting it here[^]

Re: Problems Running an Executable...

glennPattonWork327-Jul-12 0:17

glennPattonWork3

27-Jul-12 0:17

Oh boy I can see a day if Try Catch hell in front of me, the first attempt at re-installing all the available frame works didn't work, trying again after a night rest.
Java | [Coffee]

Well I have the laptop on my desk from the lab, it now looks as if the issue is caused by machines that don't have a component installed as I tried it another Windows 7 laptop and it died.
Glenn
-=-=-=-=-=-=-=-=-=-=-=-=-=-
EDIT
=-=-=-=-=-=-=-=-=-=-=-=-=-=
FileVersionInfo fsi = FileVersionInfo.GetVersionInfo(@"C:\Windows\system32\drivers\ftdibus.sys");
This was the line that was causing the program to crash! moved it to inside a button click all is well (now just to find a good try catch!)

Glenn

modified 27-Jul-12 7:52am.

cancelling the dataGridview RowValidating event is not returning me to the grid so i can edit the empty cell

Martin kipth26-Jul-12 1:39

Martin kipth

26-Jul-12 1:39

Iam trying to cancel the RowValidating event in a dataGridview but but after cancelling the event, am not returned to the grid so i can edit the row that was being validated.

In my Grid, if the isCreditSale column value is True and CustomerID column value is Empty, i want to cancel the event, tell the user what the error is, and return the user to the grid so they can edit the row cell values.

Unfortunately, when the messagebox pops up, it never goes away even if you click ok 100 times not until you just terminate the process.

This is the sample code,

private void dataGridView1_RowValidating(object sender, DataGridViewCellCancelEventArgs e)
    {

        if (dataGridView1.Rows[e.RowIndex].IsNewRow)
        {
            return;
        }

            string customer = dataGridView1.Rows[e.RowIndex].Cells["customerID"].FormattedValue.ToString();

            decimal paid;
            decimal.TryParse(dataGridView1.Rows[e.RowIndex].Cells["amountPaid"].FormattedValue.ToString(), out paid);

            bool isCredit;
            bool.TryParse(dataGridView1.Rows[e.RowIndex].Cells["isCreditSale"].FormattedValue.ToString(), out isCredit);

            if (isCredit == true && string.IsNullOrEmpty(customer))
            {
                MessageBox.Show("Please enter a customer name for this credit sale", "", MessageBoxButtons.OK, MessageBoxIcon.Error);
                e.Cancel = true;
            }   
    }

Re: cancelling the dataGridview RowValidating event is not returning me to the grid so i can edit the empty cell

Senser2226-Jul-12 2:08

Senser22

26-Jul-12 2:08

Hello Martin

at the msdn RowValidating page there is a line which recommends you to:"If the row does not pass validation, set the CancelEventArgs.Cancel property to true."
this should prevent the event from occuring more times.
Here the LINK

i hope this helps you at least a bit.

Re: cancelling the dataGridview RowValidating event is not returning me to the grid so i can edit the empty cell

Eddy Vluggen26-Jul-12 2:09

Eddy Vluggen

26-Jul-12 2:09

There's both a RowValidating and a

<a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.cellv">CellValidating</a>[<a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.cellv" target="_blank" title="New Window">^</a>]

event. The MSDN-page has an example on validating a cell.

If you show a MessageBox, the editing of the cell must have finished (since the cursor and focus exit and go to the messagebox) - hence, the value in the cell must be already corrected, or reset.

Bastard Programmer from Hell Suspicious | :suss:

if you can't read my code, try converting it here[^]

I want to write freehand text in picture box using USB Pen : in pen mode

Shirkeay25-Jul-12 21:40

Shirkeay

25-Jul-12 21:40

Sir: I want to write freehand text in per-define size picture box using USB Pen in pen mode (not in mouse mode) for than I want to use Microsoft.Ink & Strokes, I am using Pegasus SDK in that I get Pen_MoveDown, Pen_Move, Pen_Up events : In this I getting X,Y values of Pen Tip. But how to write/Use this X,Y values (Strokes) in free hand text writing

Please Help me.

Yogi Patil

Re: I want to write freehand text in picture box using USB Pen : in pen mode

Richard MacCutchan25-Jul-12 22:29

Richard MacCutchan

25-Jul-12 22:29

It's just a matter of capturing the co-ordinates each time the pen moves and drawing a line between each, and saving them in an array of some type to recreate later. However without some more specific details about what part you are having trouble with, it is difficult to offer a complete answer. There is a C++ sample application called Scribble, which may give some useful information: take a look at these links[^].

One of these days I'm going to think of a really clever signature.

Re: I want to write freehand text in picture box using USB Pen : in pen mode

Shirkeay4-Sep-12 23:09

Shirkeay

4-Sep-12 23:09

I have digital pen connect throug USB device, that device i attach with paper, through pen i write on paper, that must be display on my app. picture box what i write, but my problem is that while writing on paper i get x & y coordinates in bigger value like x=-1122 & y=3458 : on pen_move I try to write/draw that value in picture box but it not display because of bigger value of xy coordination: So I want to convert that getting xy coordination to normal form of picture box : but to it covert in vc++ some one try this like :
return CPoint( ::MulDiv( Event.XPos + 10500 / 2, m_rtPage.Width(), 10500 ) + m_rtPage.left,
::MulDiv(Event.YPos, m_rtPage.Height(), 12200 ) + m_rtPage.top );

how to convert this in C# from vc++ code

plz help me

Re: I want to write freehand text in picture box using USB Pen : in pen mode

Richard MacCutchan4-Sep-12 23:26

Richard MacCutchan

4-Sep-12 23:26

It may be a better idea to read the documentation for the pen device to discover what these co-ordinate values represent. For reference you can also check the C++ MulDiv() function[^].

One of these days I'm going to think of a really clever signature.

CPU usage problem when sending udp packets

asghari_mohsen25-Jul-12 10:29

asghari_mohsen

25-Jul-12 10:29

Hi everybody
I'm trying to send udp packets using C# Socket class. Each packet has 1024 bytes and I send packets each 5 miliseconds. It cause my system cpu usage to go more than 50% which I beleive is not natural. does anyone have any idea about my problem?

Re: CPU usage problem when sending udp packets

Dave Kreskowiak25-Jul-12 10:44

Dave Kreskowiak

25-Jul-12 10:44

asghari_mohsen wrote:
does anyone have any idea about my problem?

It sounds as though you wrote incredibly inefficient code. Without seeing it, it's pretty much impossible to tell you what's going on. You might want to update your question to include the code where you are sending packets and/or assembling the data to send.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Re: CPU usage problem when sending udp packets

asghari_mohsen25-Jul-12 11:00

asghari_mohsen

25-Jul-12 11:00

Thank you so much Dave.
I got my answer somehow, as soon as I post this thread.
I was thinking maybe the number of packets are too much. But as you said, It was a problem in my code.
Thank you again.

Compare two files

jojoba201125-Jul-12 2:15

jojoba2011

25-Jul-12 2:15

Hi world !
How to compare the files byte-by-byte via C# to get diffrence between them.
( cause i have read document that says if you compare the files byte-by-byte it will get every diff such as modify,size,...)

thanks in advanced!

Re: Compare two files

Eddy Vluggen25-Jul-12 2:19

Eddy Vluggen

25-Jul-12 2:19

ReadAllBytes from both files and loop through them. What's the problem?

Bastard Programmer from Hell Suspicious | :suss:

if you can't read my code, try converting it here[^]

Re: Compare two files

OriginalGriff25-Jul-12 2:55

OriginalGriff

25-Jul-12 2:55

Oh come on!
You have been here for over two years, and have posted over 200 messages.

You know what to do: start with google.
A very quick search "How to compare the files byte-by-byte via C#"[^] gave over 3 million hits, with Microsoft in third place...
How to create a File-Compare function in Visual C#[^]

In future, please try to do at least basic research yourself, and not waste your time or ours.

Ideological Purity is no substitute for being able to stick your thumb down a pipe to stop the water

Re: Compare two files

Dave Kreskowiak25-Jul-12 4:08

Dave Kreskowiak

25-Jul-12 4:08

I'm trying to mash the "5" button about 2 millions times, but, sadly, it'll only let me do it once... Sigh | :sigh:

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Re: Compare two files

Paul Conrad25-Jul-12 17:28

Paul Conrad

25-Jul-12 17:28

+5
He might be a very slow learner Unsure | :~

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

Re: Compare two files

OriginalGriff25-Jul-12 19:31

OriginalGriff

25-Jul-12 19:31

Either that or a Real Programmer - see your sig... Laugh | :laugh:

Ideological Purity is no substitute for being able to stick your thumb down a pipe to stop the water

Re: Compare two files

PIEBALDconsult25-Jul-12 3:32

PIEBALDconsult

25-Jul-12 3:32

Here's a link to the Lean and Mean competition from a few years ago. There are many entries you could review.

http://www.codeproject.com/script/Awards/View.aspx?cid=358[^]

Re: Compare two files

jojoba201125-Jul-12 17:58

jojoba2011

25-Jul-12 17:58

thanks everyone!
I got the solution .

i want security code

chandu.pamidiboina25-Jul-12 2:09

chandu.pamidiboina

25-Jul-12 2:09

How to provide security to high level security to projects using system information in c#

Re: i want security code

Eddy Vluggen25-Jul-12 2:18

Eddy Vluggen

25-Jul-12 2:18

chandu.pamidiboina wrote:
<layer>How to provide security to high level security to projects using system information in c#

Your question is not clear; how does system information relate to security here?

Security is a broad subject, and there's not a "code to include" or library that you can hookup and say "I'm secure".

Just as your house, when you install a large lock on the door, you feel safer - but hire an expert on the subject and he'll point out the ladder in the backyard, the unlocked windows, and the spare key under the second rock next to your front door.

What is it that you need to secure? A webapp, data, a server, sourcecode, passwords, a physical room with limited access?

Bastard Programmer from Hell Suspicious | :suss:

if you can't read my code, try converting it here[^]

Re: i want security code

Hitul Mistry25-Jul-12 6:14

Hitul Mistry

25-Jul-12 6:14

Although Microsoft by default give you security like try one thing in Microsoft Visual Studio there exist venerability like XSS(Cross Site Scripting), Sql Injection, http request attack, Directory Listening etc but if you are using older version then you have to secure it by code tricks but in next version Microsoft have been solved this venerability so take regular updates to your visual studio you don't need to worry regarding your application, Although you wan't more security then you can use HTTPS that can be configure by WCF but for that you have to purchase ssl certificate it is mostly use by gmail pages.

Now for that try one thing Create new web application

Visual Studio > New > Website > C# web apllication > Take new Textbox and command button

Now run this project and write

"Alert("Hi");"

Now click on Submit button

It will give you an error like that XSS or CSS(Cross Site Scripting) so now you are secure. Not to worry regarding that just use latest things avoide to use old versions automatically secure.

Re: i want security code

jschell25-Jul-12 6:50

jschell

25-Jul-12 6:50

Hitul Mistry wrote:
versions automatically secure.

Basically all wrong.

Software does not and never will be able to provide complete protection.
Technology certainly doesn't.

As an example of that, you store your credit card numbers on your computer and you believe your application is secure. So I just walk into your office and walk out the door with your computer.

Even if you use normal encryption idioms the box I walked out with will still have everything I need to retrieve them in an unencrypted form.

Re: i want security code

Hitul Mistry25-Jul-12 7:00

Hitul Mistry

25-Jul-12 7:00

Then you don't know how to ask question dear because you should ask like that how to secure webpage using https encrption i.e. ssl certification with 128bit encryption . You know anything about hacking you have every crack any security have you uploaded any shells, rooted any server, done any type of hacking or something then based on what you can doing so see man in security your mind plays because i know security codding i make my own codding see suppose your website have something another venerability like DNN then there is no meaning for any encryption for that your website should be secured.

For Encrption see one video tutorial
http://www.screencast.com/users/Shivkoi/folders/Default/media/92f7f313-9b1f-47f9-b99e-b9e098263da3[^]

May be help you.

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