C# Discussion Boards - CodeProject

Re: question about delegates c#

5-Feb-11 21:29

Real men don't use instructions. They are only the manufacturers opinion on how to put the thing together.

Digital man: "You are, in short, an idiot with the IQ of an ant and the intellectual capacity of a hose pipe."

Gilbertu6-Feb-11 4:01

Gilbertu

6-Feb-11 4:01

10000 X thankes
Thumbs Up | :thumbsup:

Re: question about delegates c#

OriginalGriff6-Feb-11 4:36

Extracting table from pdf in C#

6-Feb-11 4:36

You are welcome!

puneeth894-Feb-11 22:23

puneeth89

4-Feb-11 22:23

Good afternoon,
I am using pdf clown library to extract the pdf contents.Now i want to extract the whole table content from pdf.

Re: Extracting table from pdf in C#

Henry Minute5-Feb-11 4:31

Henry Minute

5-Feb-11 4:31

When you use a 3rd-party library, your best source of information is always the forum of the product.In this case it's here[^].

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”
I wouldn't let CG touch my Abacus!
When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

Re: Extracting table from pdf in C#

RaviRanjanKr6-Feb-11 23:37

RaviRanjanKr

6-Feb-11 23:37

I got this Link[^] having same question with solution.
you can try using pdfsharp managed assembly. go there[^] to take a look.

I hope it might help you

Caputre Unicode Keyboard Hook

Anubhava Dimri4-Feb-11 18:14

4-Feb-11 18:14

Hello Experts,

I have a code of Keyboard Hook In which have a problem when i m tring to Capture Unicode Character then it's not working fine.
I know that i want to use MapVirtualKeyEx, ToUnicodeEx function to convert for Unicode.
But i am not unable to understand this function .

So Please can any one help me to convert it function for Unicode Support.

Private Function KeyboardProc(ByVal nCode As Integer, ByVal wParam As IntPtr, ByRef lParam As KeyboardData) As IntPtr
        If (nCode >= NativeMethods.HC_ACTION) Then
            Dim e As Pcdll.KeyBoardEventArgs
            Dim keyCode As Keys = CType(lParam.vkCode, Keys)

            Select Case True
                Case CInt(wParam) = NativeMethods.WM_KEYDOWN Or CInt(wParam) = NativeMethods.WM_SYSKEYDOWN
                    If keyCode = Keys.LMenu Or keyCode = Keys.RMenu Then
                        Me._keyData = Me._keyData Or Keys.Alt
                        e = New Pcdll.KeyBoardEventArgs(Me._keyData Or Keys.Menu, keyCode)
                    ElseIf keyCode = Keys.LControlKey Or keyCode = Keys.RControlKey Then
                        Me._keyData = Me._keyData Or Keys.Control
                        e = New Pcdll.KeyBoardEventArgs(Me._keyData Or Keys.ControlKey, keyCode)
                    ElseIf keyCode = Keys.LShiftKey Or keyCode = Keys.RShiftKey Then
                        Me._keyData = Me._keyData Or Keys.Shift
                        e = New Pcdll.KeyBoardEventArgs(Me._keyData Or Keys.ShiftKey, keyCode)
                    Else
                        e = New Pcdll.KeyBoardEventArgs(Me._keyData Or keyCode, keyCode)
                    End If
                    Me.OnKeyDown(e)
                    If e.Handled Then
                        Return CType(1, IntPtr)
                    End If
                Case CInt(wParam) = NativeMethods.WM_KEYUP Or CInt(wParam) = NativeMethods.WM_SYSKEYUP
                    If keyCode = Keys.LMenu Or keyCode = Keys.RMenu Then
                        Me._keyData = Me._keyData And Not (Keys.Alt)
                        e = New Pcdll.KeyBoardEventArgs(Me._keyData Or Keys.Menu, keyCode)
                    ElseIf keyCode = Keys.LControlKey Or keyCode = Keys.RControlKey Then
                        Me._keyData = Me._keyData And Not (Keys.Control)
                        e = New Pcdll.KeyBoardEventArgs(Me._keyData Or Keys.ControlKey, keyCode)
                    ElseIf keyCode = Keys.LShiftKey Or keyCode = Keys.RShiftKey Then
                        Me._keyData = Me._keyData And Not (Keys.Shift)
                        e = New Pcdll.KeyBoardEventArgs(Me._keyData Or Keys.ShiftKey, keyCode)
                    Else
                        e = New Pcdll.KeyBoardEventArgs(Me._keyData Or keyCode, keyCode)
                    End If
                    Me.OnKeyUp(e)
                    If e.Handled Then
                        Return CType(1, IntPtr)
                    End If
            End Select
        End If
        Return NativeMethods.CallNextHookEx(Me._hKeyboardHook, nCode, wParam, lParam)
    End Function

Reqired Link is here :

Global Windows Hooks[^]

Thanks

If you can think then I Can.

Richard MacCutchan4-Feb-11 23:30

Richard MacCutchan

4-Feb-11 23:30

This code does not look much like C# to me. Try posting in the correct forum.

I must get a clever new signature for 2011.

Anubhava Dimri4-Feb-11 23:41

4-Feb-11 23:41

O Sorry Sir,

But if u have the solution for that pls help. Because C# and Vb.net is Mostly similer only syntex changes.

If you can think then I Can.

Richard MacCutchan5-Feb-11 0:03

Richard MacCutchan

5-Feb-11 0:03

eg_Anubhava wrote:
Because C# and Vb.net is Mostly similer only syntex changes.

That may be true but we have separate forums for a reason. Lots of people know VB.NET or C# but not both.

I must get a clever new signature for 2011.

OriginalGriff4-Feb-11 23:44

4-Feb-11 23:44

He has. He also tried posting it to Q&A as a link here - deleted.

Anubhava Dimri5-Feb-11 0:13

What is the easy and efficient way to collaborate with a remote Desktop application ? [modified]

5-Feb-11 0:13

Agree

If you can think then I Can.

Nadia Monalisa4-Feb-11 17:40

Nadia Monalisa

4-Feb-11 17:40

Hi,

I just got a new task to do. I need a desktop solution which will contact to another desktop application. My desktop application will send some message to the remote desktop application and the remote desktop application will print that message by the connected printer of that remote PC. Both of the application will be written by me in C# 4.0.

Now, how can I achieve this goal ? So far I thought, I will run IIS to the remote Desktop where the IIS will be running an ASP.NET Web Application. My application will post the message to an URL of the remote IIS served website, and that URL is an ASPX page, which will invoke a C# application and that application will print that message.

But, obviously it costs more by too much overhead. Cannot I directly connect to that printing application (using IP address or some other token) and send the print command ? Is WCF is the technology that can solve this problem ? If so, can you please show me any useful article ?

I have used WCF in my ASP.NET web application so that a remote desktop application can connect to my Web site and download information, but I did not host WCF in a Windows Application and I am not sure if that approach is the really best fit for my problem. I am not sure if WCF can be used over internet when hosting the WCF in a Windows application.

Regards

modified on Friday, February 4, 2011 11:54 PM

Re: What is the easy and efficient way to collaborate with a remote Desktop application ?

Anubhava Dimri4-Feb-11 21:19

Re: What is the easy and efficient way to collaborate with a remote Desktop application ?

4-Feb-11 21:19

You can use Client Server (Network ) Programming.
You can use also with the use of database to communicate with each other.
This Process is called Intranet in case of Using Web Part to use (With in a network).

First U must to create a server where your database or Browsers files will be store after that connect from the client machine and Use the same like internet.

Best Regard

If you can think then I Can.

Nadia Monalisa4-Feb-11 21:45

Nadia Monalisa

4-Feb-11 21:45

Thanks for the keyword 'Client Server (Network) Programming'. I searched in Google with 'Client Server Programming in C#' and found the VERY RIGHT article that just solved my problem.

Here is that article : Introduction to TCP client server in C#[^]

Determine If String Is Encrypted

Kevin Marois4-Feb-11 11:33

Kevin Marois

4-Feb-11 11:33

I'm using this encryption class:
http://www.obviex.com/samples/Code.aspx?Source=EncryptionCS&Title=Symmetric%20Key%20Encryption&Lang=C%23[^]

I'm wondering if there's any way to determine if a string has really been encrypted from a method that's receiving the string and doesn't know what the unencrypted value is.

Everything makes sense in someone's mind

Eddy Vluggen4-Feb-11 12:10

Eddy Vluggen

4-Feb-11 12:10

Find yourself some dictionaries with "known" words from various languages, and check if there's one with a lot of hits Smile | :)

I are Troll Suspicious | :suss:

Kevin Marois4-Feb-11 12:28

Kevin Marois

4-Feb-11 12:28

I'm trying to determine is the value has already been encrypted so I don't encrypt it again.

Everything makes sense in someone's mind

Richard Andrew x644-Feb-11 13:06

Richard Andrew x64

4-Feb-11 13:06

Intuitively, I believe that this is impossible.

How would the function tell the difference between an encrypted string, and a string of random characters?

The difficult we do right away...
...the impossible takes slightly longer.

Eddy Vluggen5-Feb-11 7:35

Eddy Vluggen

5-Feb-11 7:35

It wouldn't. OTOH, how many people will decide to encrypt random data?

It'd be a lousy way to gain access to something that you don't know; it might even be an MP3-file in Base64 that's encrypted in there. Counting the number of hits against a dictionary is enough indication if you merely want to determine whether you're dealing with something in plain-text or not.

I are Troll Suspicious | :suss:

OriginalGriff5-Feb-11 9:34

5-Feb-11 9:34

Me.
I frequently pad data before encryption with random info to ensure it is the same block size (say multiples of 8K). It makes it harder to work out any info about the source. Since my encrypted data includes the original length, I can just chuck the rubbish when I decrypt it.

Henry Minute4-Feb-11 13:09

Henry Minute

4-Feb-11 13:09

After a little experimentation I have noticed that there is one thing that might help you to determine this.

Only you can know if this is any help because you know roughly what sort of text is being encrypted.

Regardless of the input there should be no spaces in the encrypted text.

It's not foolproof proof, if you see what I mean, but it might help.

PIEBALDconsult4-Feb-11 13:25

PIEBALDconsult

4-Feb-11 13:25

return ( true ) ;

Ah , just run it through again.

jschell4-Feb-11 13:49

jschell

4-Feb-11 13:49

Kevin Marois wrote:
I'm wondering if there's any way to determine if a string has really been encrypted from a method that's receiving the string and doesn't know what the unencrypted value is.

One way would be to explicitly add a prefix like: 'encrypt:' and 'plain:'

However you can also note that encryption creates binary values. Strings cannot contain binary values.

The algorithm that you referenced is returning the binary data encoded as base64. So unless your system is also passing around other binary data without specifying what it is then any valid base64 value larger than a certain length (say 20) could be considered encrypted.