C#

Re: keydown event on minimized form !

kubibay25-Jun-09 10:20

kubibay

25-Jun-09 10:20

Sorry, I don't know what hook means! also C/C++ !
Can you send me a referral link about it?

maybe I can try !

Re: keydown event on minimized form !

EliottA25-Jun-09 10:25

EliottA

25-Jun-09 10:25

Information on hooking[^]

C[^]
C++[^]

Both are computer languages with similar syntax's, infact C++ was developed to extend and enhance the C language. Both are native languages.

This is an example of a Keyboard hook[^] written in C#. You can use the logic here to apply to your model.

The reason why I bothered to gather all this info? It will be useless to you, I sense you need a beginners book before attempting to understand global hooks. If you don't even know what C/C++ is, then you're in big trouble.

Good luck, you're going to need it.

Check out the CodeProject forum Guidelines[^]
The original soapbox 1.0 is back![^]

Re: keydown event on minimized form !

kubibay25-Jun-09 10:29

kubibay

25-Jun-09 10:29

this sample will be very helpful I think,
I know C# well, but I didn't mean that I don't know C/C++ I just meant I'm not familiar with that languages.

thanks for your help

using versus out of scope

jackgeek25-Jun-09 8:03

jackgeek

25-Jun-09 8:03

How does this:

using (MyObj myObj = new MyObj(); ) {
   myObj.DoSomething();
}

differ from this?:

{
      MyObj myObj = new MyObj();
      myObj.DoSomething();
}

I have been using the latter and I'm just wondering if it is more correct to use the former?

Re: using versus out of scope

harold aptroot25-Jun-09 8:14

harold aptroot

25-Jun-09 8:14

using can only be used on IDisposable implementing objects, and will call Dispose at the end. The other just quietly lets the object die. using can release the objects memory faster if the object would otherwise need to be finalized before collection (correct implementations of Dispose should call GC.SuppressFinalize)
It's usually best to use using whenever possible, especially on things like Streams and Bitmaps.

Re: using versus out of scope

OriginalGriff25-Jun-09 8:20

OriginalGriff

25-Jun-09 8:20

It's not so much a case of correctness, as necessity.
The difference is that when the "using" code block goes out of scope, the resources used are immediately disposed. MSDN on using[^]
In the second case, they will be disposed when the garbage collector feels like it.
For example, if you open a file for exclusive access, then use using. If you don't, then the file may not be completely freed and released by the time you next come around to opening it, and you could get a "file in use" exception, despite you having let go of the file four routines back.

Don't go overboard with using, but if it is a scarce resource, or similar, the using is the way to go.

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Re: using versus out of scope

Mirko198025-Jun-09 21:44

Mirko1980

25-Jun-09 21:44

There is also at least one case (SearchResultCollection) in which you must dispose manually an object to avoid memory leaks.

Serial Port synchronous read

12425625-Jun-09 7:56

124256

25-Jun-09 7:56

I'm reading text from a SerialPort that begins and ends each message with a newline character. The following code causes the console to display the message:

<br />
while (port.BytesToRead == 0) ;<br />
Console.WriteLine(port.ReadLine());<br />
Console.WriteLine(port.ReadLine());<br />

But this code causes the console to display nothing, and in fact the program hangs on the second ReadLine() :

<br />
while (port.BytesToRead == 0) ;<br />
port.ReadLine();<br />
Console.WriteLine(port.ReadLine());<br />

It seems that some kind of delay (sleeping the thread for a few tenths of a second, writing anything to the console, even setting a break point!) is necessary to make consecutive ReadLine()s execute properly. My understanding of ReadLine() is that it blocks and waits until a newline character appears in the buffer, which is inconsistent with what I'm observing. I've even tried to just clear the first newline character with a Read() or ReadChar(), but the same problem occurs.

Note: the reads need to be synchronous because the serial port data affects my program's logic. I'm not just printing to console/textbox.

gui

Alessio Granzotto25-Jun-09 7:34

Alessio Granzotto

25-Jun-09 7:34

hallo,
I need to create a new application using Visual studio .net (C#) but the boss want an attractive interface with animation and so on. can anyone give me some ideas about the product to use?
thank you very much

Re: gui

dan!sh 25-Jun-09 7:41

dan!sh

25-Jun-09 7:41

Use WPF if you are using .Net 3.0 or 3.5.

Re: gui

Arindam Sinha25-Jun-09 22:19

Arindam Sinha

25-Jun-09 22:19

You can try out the following link to sart with Visual Studio 2008 -
http://msdn.microsoft.com/en-us/vstudio/default.aspx[^]

I can suggest you to use some 3rd party product for rich user interfaces. Among them DevExpress is a very good produc per my experience. There are several other products also availble which you can use based on your requirement,cost etc.

Btw, welcome .NET world Smile | :)

Re: gui

Alessio Granzotto25-Jun-09 22:27

Alessio Granzotto

25-Jun-09 22:27

ty very much! The library wfp is exactly what i'm looking for.....

How to change dynamically Action property of SoapRpcMethodAttribute Attribute ?

redius25-Jun-09 7:27

redius

25-Jun-09 7:27

Hi,

I need to change dynamically one parameter value of this attribute : SoapRpcMethodAttribute.

My goal is to extract an Action identifier and put it in the SOAP Message to send.
Do you have some other ideas.

I will very appreciate.

Reda.

Webbrowser Messagebox Dialogresult?

f1ref1re25-Jun-09 6:05

f1ref1re

25-Jun-09 6:05

Hi, I use the standard webbrowser control (not the extended version that is available here) (.net framework version is 3.5) in my C# application. When I input data in a text field a javascript function checks that input and displays a YES/NO Messagebox based on that input. Is there any way to get the Dialogresult of that messagebox (i.e. what button was pressed) or better yet a way to intercept this event in order to display my own messagebox?

Re: Webbrowser Messagebox Dialogresult?

Arindam Sinha25-Jun-09 21:57

Arindam Sinha

25-Jun-09 21:57

I think you are using confirm() function. If not then try out the following Smile | :)

<html>
<head>
<script type="text/javascript">
<!--
function confirmUserInput() {
	var ans = confirm("Are you sure?")
	if (ans){
		alert("Thank you for your answer")
	}
	else{
		alert("Please made your mind first")
	}
}
//-->
</script>
</head>
<body>
<form>
<input type="button" onclick="confirmUserInput()" value="Confirmation">
</form>
</body>
</html>

Print a form

Samb198525-Jun-09 5:59

Samb1985

25-Jun-09 5:59

It's possible to print a form (in format A4) with all controls included in it as the form appear on the desktop ? without manual creation of a specific PrintDocument.
Is there a class that realize this print ?

Re: Print a form

musefan25-Jun-09 6:29

musefan

25-Jun-09 6:29

why can't you use PrintDocument?

it's as simple as this[^]

Life goes very fast. Tomorrow, today is already yesterday.

Re: Print a form

Samb198525-Jun-09 6:42

Samb1985

25-Jun-09 6:42

thanks...it's perfect. But the quality of the print it's low quality.

Converter converter = new Converter(delegate(int value)

Angel Romero25-Jun-09 4:39

Angel Romero

25-Jun-09 4:39

Hi everybody
I want to know what does this code do, why do they put a delegate? please explain me the topics and concepts behind every word
Thanks Smile | :)

Converter<int, String> converter = new Converter<int, String>(delegate(int value){return Convert.ToString(value);});

Re: Converter converter = new Converter(delegate(int value)

led mike25-Jun-09 4:41

led mike

25-Jun-09 4:41