C# Discussion Boards - CodeProject

Re: How to detect arrows key in key press event handler?

cocoonwls4-Nov-08 23:12

cocoonwls

4-Nov-08 23:12

Thanks for reply.
yes, i also try it .keycode, but still can't fix it.. Frown | :(

Re: How to detect arrows key in key press event handler?

dan!sh 4-Nov-08 22:03

dan!sh

4-Nov-08 22:03

You will need to override ProcessCmdKey method to catch the arrow key press.

HAPPY DIWALI[^]

Re: How to detect arrows key in key press event handler?

cocoonwls4-Nov-08 23:15

cocoonwls

4-Nov-08 23:15

Hi d@nish,

Can you please give me a simple explain on it, where should i put the override code, and should i add the virtual method on it(for override)?

thanks in advance
cocoonwls

Re: How to detect arrows key in key press event handler?

dan!sh 5-Nov-08 0:16

dan!sh

5-Nov-08 0:16

You just need to override the method in your class. This VB.Net[^] code should get you going with it.

HAPPY DIWALI[^]

Re: How to detect arrows key in key press event handler?

cocoonwls6-Nov-08 15:15

cocoonwls

6-Nov-08 15:15

Thanks

i got it!

Re: How to detect arrows key in key press event handler?

vaynenick18-Jun-14 22:19

vaynenick

18-Jun-14 22:19

you must derive a new class that is based on the class of the control that you want, and you override the ProcessCmdKey().

Syntax:

C#:
 protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
    //handle your keys here
}

Full source code..C# Arrow Key Press

Vayne

PictureBox and ThumbNail code causing Application to NOT close.

swjam4-Nov-08 19:02

swjam

4-Nov-08 19:02

I've got the following code that attaches a thumbnail image coming from an ImageList to a PictureBox. However, it is causing my application to not close once the code block gets executed. I suspect this has got to do with the resource(the photo file) not being released properly, I may be wrong though. Any experts advice would be greatly appreciated. All the best!

<br />
      Image.GetThumbnailImageAbort myCallback =<br />
                                       new Image.GetThumbnailImageAbort(ThumbnailCallback);<br />
      Image myThumbnail = this.imageList1.Images[0].GetThumbnailImage(this.pictureBox1.Size.Width-5, this.pictureBox1.Size.Height-5, myCallback, IntPtr.Zero);<br />
//      e.Graphics.DrawImage(myThumbnail, 150, 75);<br />
 <br />
      this.pictureBox1.Image = myThumbnail;<br />
      this.pictureBox1.SizeMode = PictureBoxSizeMode.CenterImage;

----------------------------------------------------------
"unzip; strip; touch; finger; mount; fsck; more; yes; unmount; sleep" - my daily unix command list

Re: PictureBox and ThumbNail code causing Application to NOT close.

Simon P Stevens4-Nov-08 22:34

Simon P Stevens

4-Nov-08 22:34

The code works fine for me.

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();

        Image.GetThumbnailImageAbort myCallback = new Image.GetThumbnailImageAbort(ThumbnailCallback);
        Image myThumbnail = this.imageList1.Images[0].GetThumbnailImage(this.pictureBox1.Size.Width - 5, this.pictureBox1.Size.Height - 5, myCallback, IntPtr.Zero);
        this.pictureBox1.Image = myThumbnail;
        this.pictureBox1.SizeMode = PictureBoxSizeMode.CenterImage;
    }

    private bool ThumbnailCallback()
    {
        return true;
    }
}

And the app exits fine.

Failure to exit is usually caused by a thread not terminating correctly. Does your abort callback get triggered? Does it correctly return?

You don't need to release the Image. This is handled by the Imagelist for you provided that you have added your image list via the designer or correctly disposed of it manually, either way though, this wouldn't prevent your app from closing.

After you have closed your app, and it's stuck without terminating, try hitting the pause button and looking at the call stack to see where it is stuck.

Simon

how to remove whitespace(<p><\p> )using stringbuilder in c#</p>

raj2313624-Nov-08 18:49

raj231362

4-Nov-08 18:49

hello all,

i am new in window apllication c#. when i load rtf file in richtextbox control with every new paragraph with

and <\p>.
i have done this..but can't remove whitespace.
he show with blankspace

<\p>.

like..there is five paragraph in file.

aaaaaaaaaaaaaaaaaaaaaaaaaa<\p>

<\p>

aaaaaaaaaaaaaaaaaaaaaaaaaa<\p>

aaaaaaaaaaaaaaaaaaaaaaaaaa<\p>

here, i want to remove two blanckspaces..

Re: how to remove whitespace(<\p> )using stringbuilder in c#

leppie4-Nov-08 20:58

leppie

4-Nov-08 20:58

what is <\p> ?

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 beta 1 - out now!
((lambda (x) `((lambda (x) ,x) ',x)) '`((lambda (x) ,x) ',x))

Re: how to remove whitespace(<\p> )using stringbuilder in c#

raj2313624-Nov-08 21:49

raj231362

4-Nov-08 21:49

Thanks leppie.

how To Add Product key Setup

Piyush Vardhan Singh4-Nov-08 18:39

Piyush Vardhan Singh

4-Nov-08 18:39

how To Add Product key Setup please help me

Piyush Vardhan Singh
p_vardhan14@rediffmail.com
http://holyschoolofvaranasi.blogspot.com
http://holytravelsofvaranasi.blogspot.com

Re: how To Add Product key Setup

leppie4-Nov-08 20:58

leppie

4-Nov-08 20:58

We cant help if we dont know your specific problem.

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 beta 1 - out now!
((lambda (x) `((lambda (x) ,x) ',x)) '`((lambda (x) ,x) ',x))

RegisterHotKey help

MeekLogic4-Nov-08 18:30

MeekLogic

4-Nov-08 18:30

I want to modify this RegisterHotKey func to allow me to set it using HashKey instead of a shortcut key but I'm not exactly sure how to do this.

this is the code for registering the hotkey in the object

protected bool RegisterHotkey(Shortcut key)
{   //register hotkey
    int mod=0;
    Keys k2=Keys.None;
    if (((int)key & (int)Keys.Alt)==(int)Keys.Alt) {mod+=(int)Win32.Modifiers.MOD_ALT;k2=Keys.Alt;}
    if (((int)key & (int)Keys.Shift)==(int)Keys.Shift) {mod+=(int)Win32.Modifiers.MOD_SHIFT;k2=Keys.Shift;}
    if (((int)key & (int)Keys.Control)==(int)Keys.Control) {mod+=(int)Win32.Modifiers.MOD_CONTROL;k2=Keys.Control;}

    System.Diagnostics.Debug.Write(mod.ToString()+" ");
    System.Diagnostics.Debug.WriteLine((((int)key)-((int)k2)).ToString());

    return Win32.User32.RegisterHotKey(m_Window.Handle, this.GetType().GetHashCode(), (int)mod, ((int)key) - ((int)k2));
}

Set a license screen in deployment of Window based project.

sumit70344-Nov-08 17:36

sumit7034

4-Nov-08 17:36

Hi guys,

I have created a windows based project for my client and it works fine for him. He is my client and want to sell this product to further clients, so for this he wants that in deployment of the project a screen should appear that shows about to insert a license key and it must match with a license which is stored in an online database.

Creation of database and checking of license key is I think is not typical, but the typical act is how to create a screen which appears in the deployment of that project and appears at the time of installation.

If any one help me then I will be highly thankful to that person.

Thanks in Advance

Re: Set a license screen in deployment of Window based project.

cyber-drugs5-Nov-08 0:29

cyber-drugs

5-Nov-08 0:29

What you are after, sounds like a Splash Screen:

www.codeproject.com/KB/cs/prettygoodsplashscreen.aspx[^]

You can add additional arguments in the code, which check to see if the project is registered or not, and if it is already registered, to not even display the Splash Screen, and just head to the main screen.

Reading Message from MSMQ and DIsplaying

honeyss4-Nov-08 17:31

honeyss

4-Nov-08 17:31

Hi,
I want to display the messages from Queue in consoleapplication.I am able to read the queues.But while displaying, if i had 6 messages in queue and in that i am able to display only 3.Please help me out in solving this.
My code is as follows:

string QueueName = ".\\Private$\\TestQ";

MessageQueue.EnableConnectionCache = false;
//// open the selected message queue
this.messageQueue = new MessageQueue(QueueName, QueueAccessMode.Receive);
while (true)
{
System.Messaging.Message message = new System.Messaging.Message();
MessageQueueTransaction msgTx = new MessageQueueTransaction();
MessageDetails messageDetails = null;
try
{
msgTx.Begin();
message.Formatter = new BinaryMessageFormatter();
message = messageQueue.Receive(new TimeSpan(0, 0, 0, 10), msgTx);

if (message.Body != null)
{
messageDetails = (MessageDetails)message.Body;

Console.WriteLine(messageDetails.ApplicationName + "\t" + messageDetails.ThreadName + "\t" + messageDetails.Status + "\t" + messageDetails.TimeStamp);
}

msgTx.Commit();
messageQueue.BeginReceive();

}

Thanks in Advance

Re: Reading Message from MSMQ and DIsplaying

Jimmanuel5-Nov-08 1:06

Jimmanuel

5-Nov-08 1:06

is messageQueue subscribed to receive the callback from the BeginReceive() call? if not that'll probably discard every other message in the queue.

Print screen including the cursor image working except for IBeam cursor

xax4-Nov-08 15:59

xax

4-Nov-08 15:59

I've tried to capture the desktop with the cursor image using different codes and none manages to draw the IBeam cursor. If I use the Cursor.Current, I always get the waitcursor; using API, I get the correct cursor. Is there a workaround?

Re: Print screen including the cursor image working except for IBeam cursor

xax8-Nov-08 14:32

xax

8-Nov-08 14:32

Nothing, guys? From what I've seen during my google searches, this is a common problem so I think there must be a workaround. I know that Ibeam is a xor cursor, but I don't know how to get the xor mask using CursorInfo.

Double

dec824-Nov-08 14:48

dec82

4-Nov-08 14:48

when should we use Convert.ToDouble and Double.Parse

Thanks

Re: Double

DaveyM694-Nov-08 15:13

DaveyM69

4-Nov-08 15:13

Convert.ToDouble[^] allows you to convert other types to a Double.
Double.Parse[^] parses a string and attempts to convert it to a Double (although normally Double.TryParse[^] would be better).

Learn how to use MSDN and Google - the links I've given were first in the lists on Google!

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)

Message Closed

4-Nov-08 10:22

razikang

4-Nov-08 10:22

Message Closed

CP Ignore - spamming the site

Dave Kreskowiak4-Nov-08 10:36

Dave Kreskowiak

4-Nov-08 10:36

Why did you feel the need to post this question in no less than 7 different forum?? It's no longer likely your ever going to get an answer to this question seeing as you saw fit to do what everyone hates -> SPAM this site with your question. Pick a single forum most appropriate for your subject, like General Discussions in your case, and post your question ONCE!

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

REPORTED AS ABUSE

leckey4-Nov-08 14:26

leckey

4-Nov-08 14:26

...

Blog link to be reinstated at a later date.

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