C# Discussion Boards - CodeProject

27-Oct-07 12:58

add in some mouse events for the picture box.

When the user clicks with the mouse, register its location (so, a start point)
When the user releases, register the loaction and you have an end point.

Now, create a new bitmap the same width and hieght as your selected area.
Create a new graphics object from your new bitmap (Graphics.FromImage)

Then draw the selected area of the picture box's image, to your new bitmap

Rectangle srcRect = new Rectangle(start.x, start.y, end.x-start.x, end.y-start.y)
myGraphics.DrawImage(myPictureBox.Image, 0,0, srcRect, GraphicsUnit.Pixel)

Then, set your pictures image to the bitmap you created earlier. Don't forget to dispose of your graphics objects and whatnot.
You also may need to add some checking between the start and end points, so you don't have any negative values around.

As for drawing the rectangle you want to crop as your dragging the mouse, register for the OnPaint event, and draw a rectangle between the start point, and the current location of the mouse.

I hope i havn't been to confusing there, i just kinda typed as i thought.

My current favourite word is: Waffle

Cheese is still good though.

Dynamic Button Loop

Michael Fritzius27-Oct-07 9:10

Michael Fritzius

27-Oct-07 9:10

Hello,

I'm trying to make a program where I modify properties of a lot of buttons. The names are sequential, like button1, button2, etc. all the way to button81. Buttons 82 through 90, though, I don't want to mess with--they have a different purpose.

I can't remember how to do this and I definitely don't want to modify each one individually. Any pointers?

Thanks for your time,
Michael Fritzius

Giorgi Dalakishvili27-Oct-07 9:38

Giorgi Dalakishvili

27-Oct-07 9:38

<br />
for(int i=1; i<91;i++)<br />
{<br />
    this.Controls["button"+i].Text="this is button number "+i.ToString();<br />
}<br />

#region signature
my articles
#endregion

Paul Conrad27-Oct-07 11:12

27-Oct-07 11:12

It would work fine, but he doesn't want to mess with buttons 82 through 90.

"I really like comments where I don't have to answer stupid questions" - stfx

Giorgi Dalakishvili27-Oct-07 11:20

Giorgi Dalakishvili

27-Oct-07 11:20

Oh I forgot then. Then it will look like this:

<br />
for(int i=1; i<82;i++)<br />
{<br />
this.Controls["button"+i].Text="this is button number "+i.ToString();<br />
}<br />

#region signature
my articles
#endregion

Paul Conrad27-Oct-07 11:25

27-Oct-07 11:25

Could always throw in a switch/if block if there is a range within the loop he wants to skip Big Grin | :-D

"I really like comments where I don't have to answer stupid questions" - stfx

Anthony Mushrow27-Oct-07 12:42

27-Oct-07 12:42

Look, if you want to skip a small portion of a loop, and an if statement, and continue:

for(int i=0; i<100; i++) {

    if(i >= 82 && i <= 90)
        continue;

    this.Controls[whatever]...
}

My current favourite word is: Waffle

Cheese is still good though.

Paul Conrad27-Oct-07 12:47

27-Oct-07 12:47

Yeah, there are alot of ways we could get creative with it Big Grin | :-D

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

Anthony Mushrow27-Oct-07 13:00

27-Oct-07 13:00

You could do all sorts of things. I still like the idea of creating the buttons dynamically though. Of course then if you needed to change them, hmm.

My current favourite word is: Waffle

Cheese is still good though.

Hesham Amin27-Oct-07 10:23

Hesham Amin

27-Oct-07 10:23

I think you should create them dynamically at runtime.

Hesham A. Amin
My blog

Re:Authenticating users using a customised internet dialers.

Michael Fritzius30-Oct-07 7:38

Michael Fritzius

30-Oct-07 7:38

Wow I haven't gotten the chance to come back and say thanks to everyone who gave answers. But I took the advice of the first person, which is what I needed, because I need to still modify the buttons during the program.

Thanks to all!
Michael Fritzius

RameshwerE27-Oct-07 8:29

RameshwerE

27-Oct-07 8:29

Hi,
Can anybody help me in how to authenticating the users while they are trying to connect to the internet using a custome dialer which i have to develope in C#.net.This application has to be a PPPOE dialer type application,here we are using Radius server to monitor the usage.I am completely new to this technology.Will RAS componant can be helpful to me in this regard,I heard that we can use WinInet something to connect to the internet.If anybody has previously worked on this type of application please guide me how to work on it.

Any help will be greatly appreciated.

Thanks,

Re: Re:Authenticating users using a customised internet dialers.

Paul Conrad28-Oct-07 6:37

Re: Re:Authenticating users using a customised internet dialers.

28-Oct-07 6:37

Should not different than any other dial-in or network authentication.

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

RameshwerE28-Oct-07 20:40

RameshwerE

28-Oct-07 20:40

Means? Can you tell me briefly.I don't know how to go with this?If you have any sample code regarding this please send it to me.

Thanks,

How to Connect to a Remote Database from a WebService?

humblepgmr27-Oct-07 7:39

humblepgmr

27-Oct-07 7:39

Hi THere, as the subject says, I'm writing a webservice and would like to connect to a database.

[WebMethod]
public ClientData[] GetClientData(int Number){

}

I'm not sure how to connect. Can someone please let me know the steps required to connect to a Remote database?

Thanks

Re: How to Connect to a Remote Database from a WebService?

RameshwerE27-Oct-07 8:13

RameshwerE

27-Oct-07 8:13

It is just like connecting to a remote database from your application means in the connection string you have to give the database systemname on which system it is deployed ,like its systemname or IP address.

For example in ur connection string u have provide the parametres like

Sqlconnection _connetcion=new sqlconnection("Server=SystemName;Initial Catalog=DatabaseName;User Id=sa; Password=;")
I hope this will works for you.
More over give this connection strings in your web.config file so that you can refer it all over the function and mainatainace will be easier if your database is moved to other systems in the future.
Sorry for my poor english Smile | :)

Happy programming.

Cheers,

Re: How to Connect to a Remote Database from a WebService?

Paul Conrad27-Oct-07 8:28

27-Oct-07 8:28

Connecting to a database from a web service shouldn't be any different than a regular app.

"Find it your bloody self - immediately!" - Dave Kreskowiak

TO disable ALT+F4

tahir_makhdoom27-Oct-07 6:36

tahir_makhdoom

27-Oct-07 6:36

I HAVE DISABLED CTRL ALT DEL COMBINATION BUT I HAVENT FOUND SOLUTION TO DISABLE AL+F4. If any one guide me i shall be thankful to him.

tahir

Anthony Mushrow27-Oct-07 7:02

27-Oct-07 7:02

HAVE YOU TRIED OVERRIDING WNDPROC?

Don't use caps lock, it makes you look foolish, well except to highlight one or two words, but not a sentence.

My current favourite word is: Waffle

Cheese is still good though.

Paul Conrad27-Oct-07 8:29

27-Oct-07 8:29

The Undefeated wrote:
Don't use caps lock, it makes you look foolish

Thank you.

"Find it your bloody self - immediately!" - Dave Kreskowiak

Paul Conrad27-Oct-07 8:30

27-Oct-07 8:30

tahir_makhdoom wrote:
I HAVE DISABLED CTRL ALT DEL COMBINATION BUT I HAVENT FOUND SOLUTION TO DISABLE AL+F4.

No all caps, it is considered rude. Like the other poster said, you are going to have to hook into the keyboard.

"Find it your bloody self - immediately!" - Dave Kreskowiak