Key Presses - C# Discussion Boards

Creating textboxes

garga19-Sep-07 0:40

garga1

9-Sep-07 0:40

How to create textbox in c#..?? And how to set the tab space..??

Re: Creating textboxes

Giorgi Dalakishvili9-Sep-07 1:07

Giorgi Dalakishvili

9-Sep-07 1:07

You can drag it from the toolbox and drop it on the form to have it created automatically or you can create it like this:

TextBox mybox=new TextBox();

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drag and drop in datagridview???????

San@Coding9-Sep-07 0:14

San@Coding

9-Sep-07 0:14

Hi
i want to drag item from listbox onto datagridview.
Can anybody provide coding 4 that....

Thanx in advance

how can send a Unicode message with "at command" and gsm ?

B.A8-Sep-07 21:42

B.A

8-Sep-07 21:42

hi

i want to send a message with "at commands" (and gsm modem).

i can send message and receive message.

and now that want to send a Unicode message (Arabic) can not !

can you guide me to send a Unicode with gsm modem and "at command" or any other command via serial port?

tanks

Re: how can send a Unicode message with "at command" and gsm ?

Giorgi Dalakishvili8-Sep-07 23:34

Giorgi Dalakishvili

8-Sep-07 23:34

Have a look at this web page: http://www.scampers.org/steve/sms/ It has example of sending at messages and sending Unicode sms messages so it might help you

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Re: how can send a Unicode message with "at command" and gsm ?

B.A9-Sep-07 19:18

B.A

9-Sep-07 19:18

hi Giorgi Dalakishvili :

tanks so much.
your reference was very helpful for me.
Smile | :)

Re: how can send a Unicode message with "at command" and gsm ?

Giorgi Dalakishvili9-Sep-07 20:36

Giorgi Dalakishvili

9-Sep-07 20:36

You are welcome Smile | :)

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Key Presses

ahojed8-Sep-07 21:00

ahojed

8-Sep-07 21:00

Essentially, I want to press a key while running my application and have something happen.

Let's say I have Form with 3 TextBoxes named tb1, tb2, and tb3. What's the best way of setting things up so that when I press '1' tb1 is focused, '2' tb2 is focused, and '3' tb3 is focused. I know I can set up KeyPress events for tb1 AND tb2 AND tb3 to do this, but that seems very redundant. Is there a way where, no matter who currently has focus, I can press '1' and give tb1 focus? Thanks for the help, sorry, I'm new to C#.

Re: Key Presses

Ermak868-Sep-07 22:50

Ermak86

8-Sep-07 22:50

hi give each textbox eventhandler which uses form method form.OnKeyPressed(eventhandler) and then in form keypress event handle it

Pawel

Re: Key Presses

Giorgi Dalakishvili8-Sep-07 23:23

Giorgi Dalakishvili

8-Sep-07 23:23

You can set up an event handler for the forms KeyPress event. You should set Form.KeyPreview property to true in order for the form to get all the events first

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Re: Key Presses

ahojed9-Sep-07 4:14

ahojed

9-Sep-07 4:14

Oh, I was missing that KeyPreview to true before... cool, I got it working, thanks so much!

Re: Key Presses

Giorgi Dalakishvili9-Sep-07 4:40

Giorgi Dalakishvili

9-Sep-07 4:40

You are welcome Smile | :)

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socket programing

ali_reza_zareian8-Sep-07 19:19

ali_reza_zareian

8-Sep-07 19:19

hi I want to write client/server programs that have interaction with each others. If client program want to access server what should I need? Just server ip and port number!
Should I have router ip or etc?!

Re: socket programing

Ermak868-Sep-07 22:55

Ermak86

8-Sep-07 22:55

hi it depends. if you want to connect through internet you must have ip number of your computer(router) which connects to internet and direct (i don't know how it is called in english) ports used by program to your serwer.

If you want to connect through LAN serwer ip should be enough

Pawel

socket programing

ali_reza_zareian8-Sep-07 19:19

ali_reza_zareian

8-Sep-07 19:19

hi I want to write client/server programs that have interaction with each others. If client program want to access server what should I need? Just ip and port number!
Should I have router ip or etc?!

Re: socket programing

Vasudevan Deepak Kumar8-Sep-07 23:56

Vasudevan Deepak Kumar

8-Sep-07 23:56

Duplicate question. Check your other post with responses at:

http://www.codeproject.com/script/comments/forums.asp?msg=2218974&forumid=1649#xx2218974xx[^]

Vasudevan Deepak Kumar
Personal Homepage
Tech Gossips

Use textfile as source for a combo boxes items?

clashie8-Sep-07 16:15

clashie

8-Sep-07 16:15

In C#, I'm trying to read a text file into a combo box and use it as the items. When I try to do it, I get the newline characters and it's all smashed into one line. Any ideas or example on how to do this would be appreciated.

Re: Use textfile as source for a combo boxes items?

Christian Graus8-Sep-07 16:21

Christian Graus

8-Sep-07 16:21

How are you doing it ? File.ReadAllLines will give you a string array, which is a viable data source for a combobox.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Re: Use textfile as source for a combo boxes items?

clashie8-Sep-07 17:42

clashie

8-Sep-07 17:42

I was goofing with StreamReader, this worked fine!

Thanks!

Marshalling

aruna_koride8-Sep-07 13:46

aruna_koride

8-Sep-07 13:46

Hi
I have to Marshal a class which is holding a collection , How to achieve this??Is there any way to Marshal a collection in a class,I know that string, bool having MarshalAs methods, but collection dont have ??
prompt reply is appreciated as it is quite urgent..
Thanks

PropertyGrid Binding in WPF

aruna_koride8-Sep-07 13:38

aruna_koride

8-Sep-07 13:38

Hi
I want to populate a propertygrid passing treeview node argument in WPF.Please advise..I am new to WPF.

Thanks

Using Low Level keyboard hook problem [modified]

kamalesh828-Sep-07 12:03

kamalesh82

8-Sep-07 12:03

Hi all,

Currently am working in a project, where in my application there is a window form, holding several pages(using WPF).now i've to implement session timeout functionality in my application using window hook for keyboard and mouse. i've a implemented a timer(System.Threading)TimerCallback, which periodically examine, whether, any key board message or mouse message occure ONLY ON MY APPLICATION. this means, minimizing my application form, i can play computer game, but after certain period my application can throw timeout session.

now the problem is, delegate(by which i'm calling window hook function whenever key or mouse pressed) is firing event even if my function is minimized. (i know this will fire), but the only requirement is how i manipulate these messages (key and mouse messages)only haapen to my application window. i don't know how to do this.. please help

please go through these urls, as i'm trying to develop window hook, by help of these.....

here he has used WH_KEYBOARD_LL Hook which is global

1. "http://blogs.msdn.com/toub/archive/2006/05/03/589423.aspx"
2. "http://blogs.msdn.com/toub/archive/2006/05/03/589468.aspx"

Please please help...... Sniff | :^)

-- modified at 18:14 Saturday 8th September, 2007

kamalesh

Single instance forms in an MDI app

martin_hughes8-Sep-07 9:20

martin_hughes

8-Sep-07 9:20

I've read a couple of "solutions" to the problem of ensuring that only one instance of a form opens within an MDI app - notably this one http://www.codeproject.com/csharp/single_instance.asp[^]

To me, that and other similar solutions, look overly complicated. Is there anything particularly wrong with using the following?

<br />
        uxLoginForm login = null;<br />
        <br />
        private void toolStripButton1_Click(object sender, EventArgs e)<br />
        {<br />
            if (login == null || login.IsDisposed )<br />
                login = new uxLoginForm();<br />
            login.Show();<br />
        }<br />

Me: Can you see the "up" arrow?
User:Errr...ummm....no.
Me: Can you see an arrow that points upwards?
User: Oh yes, I see it now!

-Excerpt from a support call taken by me, 08/31/2007

Re: Single instance forms in an MDI app [modified]

Ed.Poore8-Sep-07 12:25

Ed.Poore

8-Sep-07 12:25

martin_hughes wrote:
Is there anything particularly wrong with using the following?

It'll work if that's what you mean, perhaps where you could improve is upon the extensibility. I haven't thought this through very much but perhaps a slightly more extensible version would be:

Dictionary<Type, Form> m_SingleInstanceForms = new Dictionary<Type, Form>();
protected Dictionary<Type, Form> SingleInstanceForms
{
    get { return this.m_SingleInstanceForms; }
}

protected virtual void ActivateChildForm<T>() where T : Form, new()
{
    if (!this.SingleInstanceForms.ContainsKey(typeof(T)))
    {
        T newForm = new T();
        this.SingleInstanceForms.Add(newForm);
        newForm.MdiParent = this;
    }
    Form formToActivate = this.SingleInstanceForms[typeof(T)];
    formToActivate.Show();
    formToActivate.Activate();
}

private void toolStripButton1_Click(object sender, EventArgs e)
{
    this.ActivateChildForm<uxLoginForm>();
}

Now you have one method which will activate (and if required, create) any class derived from System.Windows.Forms.Form.

Last modified: 1min after originally posted -- Edited bug in code

Re: Single instance forms in an MDI app [modified]

martin_hughes8-Sep-07 13:38

martin_hughes

8-Sep-07 13:38

Problem with this is that once the login form has been opened and closed once, it gets disposed, so neither the Show() or Activate() methods will work.

Easily fixed by hacking your example and adding an additional else if:

if (!this.SingleInstanceForms.ContainsKey(typeof(T)))
{
    T newForm = new T();
    this.SingleInstanceForms.Add(typeof(T),newForm);
    newForm.MdiParent = this;
}
else if (this.SingleInstanceForms[typeof(T)].IsDisposed)
{
    T newForm = new T();
    this.SingleInstanceForms[typeof(T)] = newForm;
    newForm.MdiParent = this;
}

But doing so looks a bit errrmm inellegant - although I'm sure that it could be refactored out to be made nicer (but it's late and I've had a couple of beers). Or microsoft could implement an UnDispose() method Smile | :)

Anyway, cheers - it was interesting having a look at generics, which I haven't really dipped into yet.

A quick question:

protected virtual void ActivateChildForm<T>() where T : Form, new()

I guess that the where T : Form limits what can be passed in as <T>, but what's the new() about?

Me: Can you see the "up" arrow?
User:Errr...ummm....no.
Me: Can you see an arrow that points upwards?
User: Oh yes, I see it now!

-Excerpt from a support call taken by me, 08/31/2007

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.