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I was wondering what kind of memory I use when I, for example, declare a new variable... Is it Ram, or disk swap? Do I have any control over that? Can I find out how much free memory a system has?
Thanks,
Andrei Matei
andreimatei@home.ro
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When you declare a variable it gets created in RAM. If your available RAM is low then the system might swap some stuff to disk in order to free up some RAM, but even in that case your variable would stil reside in RAM. As far as I know you really don't have much control over that.
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i want to know what kind of options does one have to capture video using .NET Framework?
urgent reply would be appreciated!
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try searching for "video"...
"When the only tool you have is a hammer, a sore thumb you will have."
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well i did for that matter, but the thing is i came up with a few techniques, i want to know if someone has implemented video capturing in .NET......so that i can get a jumpstart!
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search THIS site for "video" there are loads of .net examples for video
"When the only tool you have is a hammer, a sore thumb you will have."
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have you used WMI(Windows Managment Instrumentation) for capturing video? or anyone in this site?
using tool Visual C#
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use the SEARCH box! the first item is about wmi using c#
sesh!
"When the only tool you have is a hammer, a sore thumb you will have."
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well if you have a look its not about video capturing...jjust wanted to know if someone has tried video capturing through WMI!
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How do I open an Access database exclusively using the System.Data.OleDb.OleDbConnection class? There doesn't seem to be a Mode property, and I can't find any Connection String properties to do it?
Thanks in advance.
Kyosa Jamie Nordmeyer - Cho Dan
Portland, Oregon, USA
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The easiest way to get a connection string to do what you want is to use the Universal Data Link dialog. To do this:- Create a new text file on the desktop
- Rename it to 'access.udl' (the icon should change to a computer in front of a table)
- Double-click the icon
You should now get a property sheet labelled 'Data Link Properties'.
Go to the Provider tab and select the Microsoft Jet 4.0 OLE DB Provider. Go to Connection and browse to the database you want to open, then ensure the username and password are correct. Choose 'Test Connection' to check you're all right so far. On the Advanced tab, under Access Permissions uncheck Share Deny None and check Share Exclusive. Click OK.
Now open the .UDL file in Notepad. It should look something like:
[oledb]
; Everything after this line is an OLE DB initstring
Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Work\MyDB.mdb;Mode=Share Deny Read|Share Deny Write;Persist Security Info=False
I hope that shows alright on your browser; CodeProject converts [semicolon][P] into a smiley...;P
Copy the initialisation string into your code, and you should be done.
--
Mike Dimmick
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Cool, that's what I needed! I normally don't like using .udl's, but I can, of course, steal it's connectionString, then delete it. Duh! 
Thanks a bunch, Mike!
Kyosa Jamie Nordmeyer - Cho Dan
Portland, Oregon, USA
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I'm having problems figuring out how the read the RSA keys from either the KeyFile.snk file generated from sn.exe -k KeyFile.snk or from our signed assembly that uses that KeyFile (which would be preferred). Does anyone have any ideas how I can read these in? About the only method I found was to create an RSAParameters struct and fill it with the base64-encoded data from the public key, but I'd have to dig into RSA a little to figure out the byte alignment and what not. I don't mind doing that, but I'm hoping there's already a method or something that does this in the .NET Framework class library. Anyone know of any?
Reminiscent of my younger years...
10 LOAD "SCISSORS"
20 RUN
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I design a webservice with c#,
this webservice have some [WebMethod(EnableSession=true)]'s method
but when I use it with c++,Session lose
why?
thanks, codeproject
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**CROSSPOSTED TO VS .NET IDE ISSUES FORUM**
Hi all,
I've got a class called RowView derived from UserControl, which is itself the parent of another class (AuthorView).
RowView has a public property Data. Since RowView should never be instantiated directly (it's a pseudo-abstract class) it doesn't implement Data, it simply throws a NotSupportedException. My AuthorView class does implement Data.
Now my problem is that whenever I try and 'design' AuthorView in VS .NET the designer tries to access RowView.Data, which throws an exception.
So my question is, how do I stop VS .NET's designer from attempting to access Data. I've tried settig the Browsable attribute to false in RowView.Data, but it doesn't help.
I can post up some code if that'll help clarify the situation.
TIA,
Pete
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you can always chekc if you are in designmode (this.designmode) and NOT throw the exception if you are in design mode..
not that this is a solution but i suppose it will atleast let you continue working on your controls untill you find a solution for this...
//Roger
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Funny, that's exactly what I did do 
And I was thinking the same thing: "Hmm, this can't be the right way to do this... Ah well, at least I can keep coding while I wait for some kind of solution.."
Thanks Roger,
Pete
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Anyone know how I can get a control to validate itself?
I have a nice event handler for Validating which changes the colour of a textbox if it's contents aren't suitable. I'd like the controls to initially start out in the correct state, but at the moment they only validate themselves if I focus on them then defocus. Any ideas?
TIA,
Pete
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If you have small number of controls to validate It is a fine idea to do so with a schema like: (OnFocus - OnBlur)
But if the number of controls is large say 20-25 controls then it is always a good idea to validate controls using a seperate routine.
If you want your controls to be self sufficient you can derive them from existing controls then override and add new properties.
Override the required events (e.g. Focus etc...)
Provide a Delegate
Add new event handler
And do any thing you want in the handler
Hope this helps
Happy Programming
-- Sumeet
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Hi all,
can anyone see anything glaringly wrong with this:
public class NumberBox : TextBox
{
protected override void OnKeyPress( KeyPressEventArgs e )
{
if( !char.IsDigit(e.KeyChar) && !char.IsControl(e.KeyChar) )
e.Handled = true;
base.OnKeyPress( e );
}
}
It doesn't have to be super-secure or anything (I don't care about Ctrl-V etc) cause I validate the control's Text later anyway, it's just a quick and easy way to persuade my lovely users to only enter numbers.
So I was just wondering if anyone can spot any usability problems with this? I'm not worried about
negative numberspasting in incorrect data, etcdecimal points and thousand seperatorsTIA,
Pete
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Looks fine to me! Are you getting errors?
"Do unto others as you would have them do unto you." - Jesus
"An eye for an eye only makes the whole world blind." - Mahatma Gandhi
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No, I was just wondering if there were some subtle caveats that I'd missed - that always seems to be the way when I play with new class libraries 
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You're still calling base.OnKeyPress, which will just let TextBox handle it. Your code should read:
if ( !char.IsDigit(e.KeyChar) && !char.IsControl(e.KeyChar) )
{
e.Handled = true;
return;
}
base.OnKeyPress(e);
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I know I'm still calling OnKeyPress(). It seems to work that way, because e.Handled = true. I wasn't sure wether to call it or not, I figured that it was best to call it just in case the Framework has to do some kind of housekeeping.
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Nah, the e.Handled takes care of the underlying Win32 housekeeping behind the scenes.
[I'm sure you realize this, but my comments below are for our gentle OOP neophytes out there...]
You should only call base functions a) if they're required (see the reference dox for the base methods) or b) if you wish to use the default base implementation.
In the case of your derived TextBox class, you wouldn't want to call base.OnKeyPress() because you don't want the default behavior.
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