C# Discussion Boards - CodeProject

Peter Nirschl10-Apr-04 21:38

10-Apr-04 21:38

Let's say we have a textBox called textBox1.
And let's say we hava a picture box called pictureBox1.
We use pictureBox1 to view the image.

The user types in the CORRECT path.
The user clicks on a button.

And now the button's OnClick event:

Image img = Image.FromFile (<font color=#0000ff>this</font>.textBox1.Text);<br />
<font color=#0000ff>this</font>.pictureBox1.Image = img;

Then add an error handling with TRY and CATCH.

I've already tested this code.
It MUST work.

Re: FileStream help! :(

Chad Smith11-Apr-04 9:30

Chad Smith

11-Apr-04 9:30

If the path is specified by the user then use
Image img = Image.FromFile ( @foto );

Re: FileStream help! :(

amal_pro8311-Apr-04 9:57

amal_pro83

11-Apr-04 9:57

as i understood that u ve image and u want to open it from stream file...

1-u cant use Image class as it is abstract one, so u cant define object from it
2-u use Bitmap class to open ur image
//example: dont forget to use (Using System.Drawing)

Bitmap myimage=new Bitmap(filestream,true);

//constructor use true to make error correction..hope it works

How to Deploy windows application for only 15 days?

KRathor10-Apr-04 12:10

KRathor

10-Apr-04 12:10

Hello,

I'm developing some windows based application. I have made a setup to deploy the application to some other computer. I want to deploy an application for only 15 days. Or you can say that i want to deploy an application as trail version of 15 days for testing purpose. After 15 days, application should be stoped working automatically. D'Oh! | :doh:

Hopefully, someone will understand my question and will reply me as soon as possible.

Thanks.

Re: How to Deploy windows application for only 15 days?

leppie11-Apr-04 8:04

leppie

11-Apr-04 8:04

IF your are asking a question like this, i doubt anyone would buy the app. :\

^{top secret AdvancedTextBox Sneak Preview}

Re: How to Deploy windows application for only 15 days?

KRathor11-Apr-04 9:20

KRathor

11-Apr-04 9:20

Infact, i have to deploy the application for testing purpose to the company before the final deployment. So instead of giving me this answer, reply me the solution. Roll eyes | :rolleyes:

Thanks.

Re: How to Deploy windows application for only 15 days?

Jeremy Luebke11-Apr-04 9:49

Jeremy Luebke

11-Apr-04 9:49

There are multiple ways and there are also a multitude of companies that make a living off of providing this type of solution. I don't think there is an easy solution that can be posted to the forum.

The easiest way would probably be using a registry key added upon instalation and some code in the app that checks the key and compares a date against a certain period of time.

Here are some long list of companies providing ready made components. I only see one open source one but there may be more.

http://dmoz.org/Computers/Software/Licensing/License_Management/
http://dmoz.org/Computers/Security/Products_and_Tools/Software_Protection_and_License_Control/

--------------------
It is what is is!

Re: How to Deploy windows application for only 15 days?

Nnamdi Onyeyiri11-Apr-04 9:50

Nnamdi Onyeyiri

11-Apr-04 9:50

there are C++ examples, such as Nish's one[^] that do what you are asking, maybe you can port those over to C#.

To those who didn't make it, we will remember you. To those who did Green Alien | [Alien]

is back. - Megan Forbes in Black Friday
Another Post by NnamdiOnyeyiri

Transparent Controls

muralidharck10-Apr-04 2:57

muralidharck

10-Apr-04 2:57

Hi
Is there any method by which I can make an app transparent...like even if it appears(not completely transparent), it should not respond to mouse clicks (say if the ctrl key wasnt pressed along with a mouse click) and should transfer the ctrl to the app behind it...

Example:

Letz a scoreboard display and behind it IE...u dont need any user triggered event for it...so even if i click in the display, IE should respond and not the display..

Is there any method in C#?

Thanks

Re: Transparent Controls

twisterjosh10-Apr-04 3:30

twisterjosh

10-Apr-04 3:30

Oh most definately, there is a property in the System.Windows.Forms.Form class! Make a form with these properties:
/////
this.TransparencyKey = System.Drawing.SystemColors.Control;
this.Opacity = .8;
/////
Setting the TRANSPARENCYKEY to that will make the form seem invisible. Not visibly, but... like you said, it makes it so when the user clicks, it responds to whatever is running behind it.

Setting the OPACITY makes it look invisible. Setting it to "1.0" makes it very slightly invisible, however, when set to ".1" you can hardly see it.
Hope this helps!

Re: Transparent Controls

muralidharck10-Apr-04 3:33

muralidharck

10-Apr-04 3:33

kewl thanks..ill try it...

Re: Transparent Controls

muralidharck10-Apr-04 3:36

muralidharck

10-Apr-04 3:36

But is it possible to get the controls to this transparent window when needed (like it shud respond whenever i click the mouse along with the ctrl key)...?? Because from what you said..it seems that windows will manage the ctrls and decide only based on opacity and not on programmer's setting right?

Here it is!! :-D

twisterjosh10-Apr-04 3:51

twisterjosh

10-Apr-04 3:51

Here ya are! Best I can come up with so far! Any questions?

<br />
  public class Joshua : Form {<br />
    [STAThread]<br />
    public static void Main() {<br />
      Application.Run(new Joshua());<br />
    }<br />
<br />
    public Joshua() {<br />
       this.ClientSize = new Size(520, 310);<br />
       this.Name = "Form1";<br />
       this.ShowInTaskbar = false;<br />
       this.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Hide;<br />
       this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;<br />
       this.TopMost = true;<br />
       this.TransparencyKey = System.Drawing.SystemColors.Control;<br />
       this.Opacity = .8;<br />
    }<br />
<br />
    protected override void OnKeyDown(KeyEventArgs kea) {<br />
      if(kea.KeyCode == Keys.ControlKey) {<br />
        this.TransparencyKey = System.Drawing.Color.Empty;<br />
      }<br />
    }<br />
<br />
    protected override void OnKeyUp(KeyEventArgs kea) {<br />
      if(kea.KeyCode == Keys.ControlKey) {<br />
        this.TransparencyKey = System.Drawing.SystemColors.Control;<br />
      }<br />
    }<br />
  }<br />
<br />

Re: Here it is!! :-D

muralidharck10-Apr-04 4:12

muralidharck

10-Apr-04 4:12

Yo buddy..

tat works...need to build my app (it is just a cricket(a game) scorecard )..as existing ones occupy my desktop Frown | :(

thanks again pal...tat was one awesome quickness uve got!!

Re: Here it is!! :-D

twisterjosh10-Apr-04 4:21

twisterjosh

10-Apr-04 4:21

Great! Glad I could help Big Grin | :-D

Read Email

Silly Boy10-Apr-04 0:53

Silly Boy

10-Apr-04 0:53

hi every body!
I want to write a program that can take all unread mail from OutLook, but don't know how to do it, any one have experience about it, please give me some suggest!
Thanks alot!

xyz

Re: Read Email

econner10-Apr-04 7:27

econner

10-Apr-04 7:27

You could use a third party IMAP control. IMAP has a flag that can be checked if a message has been read. However, with IMAP, you will have to have the username and password to "login" to the account you want to check.

I have used the IMAP control from http://www.quiksoftcorp.com/.

MSN Chat Sessions

amal_pro839-Apr-04 23:27

amal_pro83

9-Apr-04 23:27

hello dave,

how r u?? i hope u r okay,,,,as u r the one who advice me here very good advices...today i want to trace MSN Chat sessions...so what do u suggest??

and their history of course

Re: MSN Chat Sessions

amal_pro8311-Apr-04 9:52

amal_pro83

11-Apr-04 9:52

hello there,

dave doesnt reply me so any1 knows how we know the msn chat sessions history programmatically???

Suggested reading?

MeterMan9-Apr-04 22:44

MeterMan

9-Apr-04 22:44

I'm sure many of you have read several books on c# out there. I looked at the book reviews on here and didn't really find what i was looking for.
I would like a book if one exist. That takes you thru c# from beginning to advanced. Basically a book that assumes you know nothing about the language. Then when you turn the last page you know how to make real world applications with a pretty good syntax understanding. I just don't like books that say ok here is the code. and never really explains what does what. an example is great but only if you understand what the example is doing.

Is Professional C# any good?
I hate the Sam's books. They say learn in 24 hours, its more like 24 years.

I would like a book for visual c# if possible.

Thanks for your reply

Win32newb
"Making windows programs worse than they already are"

Re: Suggested reading?

Mikko Puonti9-Apr-04 23:43

Mikko Puonti

9-Apr-04 23:43

"C# and the .NET Platform" by Andrew Troelsen, Apress[^]

Is pretty good... IMHO.

Re: Suggested reading?

Jesse Squire10-Apr-04 4:18

Jesse Squire

10-Apr-04 4:18

I was very fond of Jesse Liberty's Programming C#[^].

--Jesse

porting this code to c#

Paolo Ponzano9-Apr-04 19:48

Paolo Ponzano

9-Apr-04 19:48

hi,
I'm porting a program made in C to C# and I get blocked at this point

<br />
long UpdateCRC (unsigned long CRC, const char *buffer, long count)<br />
{<br />
<br />
  if ( buffer && count )<br />
  {<br />
     do {<br />
       CRC = ((CRC >> 8) & 0xFFFFFF) ^ CRCTABLE[(unsigned char)( (CRC & 0xff) ^ *buffer++ )]; <br />
     } while(--count);<br />
      <br />
  }<br />
  return CRC;<br />
}<br />
}<br />

My question is.... C# does not suppot --count and *buffer++...... how to solve it? it's better to make a dll from my old program and to call functions losing portability or there's a workaround??

thanks in advance

Re: porting this code to c#

Roger Alsing9-Apr-04 19:55

Roger Alsing

9-Apr-04 19:55

first you have to mark your method "unsafe" since it uses pointers..

unsafe long UpdateCRC (unsigned long CRC, const char *buffer, long count)

also , c# dont auto convert numbers into bools, so you have to do:

while(--count>0);

//Roger

Re: porting this code to c#

Paolo Ponzano9-Apr-04 20:11

Paolo Ponzano

9-Apr-04 20:11

and for what concern *buffer++??
I find extremly hard to use pointer in C#... =)

thanks for having answered me so fast

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