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I would like to know the differences between deriving from Control or UserControl when you are building a custom control.
I know that is easier to create if you use UserControl because you can drag&drop (like into a form) but, is there any other difference? I am particularly worried about run & design time.
Thanks in advance.
Ivan.
Iván Fernández
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A big difference is designer support. UserControls have designer support right out of the box. Custom controls dont.
It kind of depends on what you are doing. If you just need to make a composite control (ie. label and textbox) then use UserControl. If you need to do basic custom painting just do that in the paint events or overide OnPaint... For more advanced programming use Control.
I've done a huge amount of UI work, so tell me what kind of control you are making and I'll give you advice on how to implement it.
***** And delete your duplicate posting please.
This posting is provided "AS IS" with no warranties, and confers no rights.
Alex Korchemniy
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For a composite control, couldn't I just use a panel as a container?
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That's not exactly a composit control. That's just controls grouped together in a panel.
Composit control is something you can put in your toolbox and reuse.
This posting is provided "AS IS" with no warranties, and confers no rights.
Alex Korchemniy
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I would like to know the differences between deriving from Control or UserControl when you are building a custom control.
I know that is easier to create if you use UserControl because you can drag&drop (like into a form) but, is there any other difference? I am particularly worried about run & design time.
Thanks in advance.
Ivan.
Iván Fernández
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hello!
could someone please point out how I can tell the compiler to calculate (say a sin wave lookup table) during compile time?
many thanks in advance, Dominik
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You probably have to write a separate program and use pre- or post- build events to call that program. That means the program should be command line (Console).
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I have a Base class which is inherited by XYZ.
An app of mine uses reflection to inspect XYZ and bind it's public properties to a PropertyGrid control (awesome control BTW.)
Some of the public properties in XYZ have the Browsable attribute set to false so that the PropertyGrid won't pick them up.
However the Base class has some public properties which I don't want the PropertyGrid to pick up on either. I cannot modify this Base class.
How can I add the Browsable attribute to these inherited members from within XYZ?
The members in question are not virtual, abstract or overridable.
regards,
Paul Watson
South Africa
Michael Dunn wrote:
"except the sod who voted this a 1, NO SOUP FOR YOU"
Crikey! ain't life grand?
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Hi all,
I developed application in VC++ 6.0 about gets file in the FTP server using CFtpConnection class. What class is similar it in C#.
Thanks for your help.
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batman < binhpt.evnit@evn.com.vn > wrote:
What class is similar it in C#.
None. The .NET framework doesn't offer FTP support (IMO, a big omission). You'll need some FTP library, and there are lots of free FTP libraries out there, some of them here at CP.
Yes, even I am blogging now!
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It probably would have been a good idea to have it in a seperate assembly (not everyone needs FTP support so no point in bloating the main assemblies)
This posting is provided "AS IS" with no warranties, and confers no rights.
Alex Korchemniy
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Hi,
How will I be able to pass data I get back in a static Callback to a parameter in the same form-class?
public class TestForm : System.Windows.Forms.Form
{
public sting result;
...
...
public static void ParseResult(IAsyncResult arResult)
{
//This is what I want to do but it doesn't work!
this.result = "test!";
}
...
...
}
/Dalle
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wrong variable declaration
public static string result;
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Tanks! 
/D
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I'm not very familiar with asynchronous execution but I think the following should work:
When beginning the asynchronous call pass the actual instance of TestForm as state object and retrieve it in the callback by using the IAsyncResult.AsyncState property.
www.troschuetz.de
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Hi all,
I am writing a program that can notify users of certain event
by showing up a pop up window of the notifying message on the
desktop. The notification can be set to be triggered at a preset time.
The notification message can be triggered even that the program is not running, once it is set to be triggered at certain time by the program and then the program is shutdown. Is it possible ?
Thanks
Patrick
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There are obviously 2 ways to do it (or there are 2 I know of).
You could use the Windows-Scheduler and have it start a program at a certain time. That program could then "notify" the user.
Or you could create a little "Taskicon"-Application which would be launched by the program and do your notification.
Basically, that is the way Real (RealScheduler/RealPlayer), ICQ and others do it: they have a small app running, which reacts to certain events.
Cheers
Sid
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Venerable sir,.
I want a two dimensional matrix of boxes on my fom. what is the best way to do this ?. Also I need to add some text to each box and these boxes must be accessible from any button click event ? Please response to this thread as soon as possible.
thank you,
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By your requirements, there's nothing special here. All you do is drag the boxes you want onto the form and arrange them how you want. All the properties and methods of the boxes are available to any code behind any of the controls on the form after that.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Where can I get Windows XP and Office 2003 graphic icons which I need to use in my application?
Brendan
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