C# Discussion Boards - CodeProject

Luc Pattyn23-Dec-09 10:45

23-Dec-09 10:45

There is a set of IsXxx properties (e.g. IsPublic) but their mapping onto the C# keywords isn't really clear to me.

Smile | :)

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Re: Reflection Get Access Modifier

dataminers24-Dec-09 1:50

dataminers

24-Dec-09 1:50

I know, I get public access modifier;

private string GetClassAccessModifier(Type pClass)
{
if (pClass.IsPublic)
return "public ";
}

But how can I get internal and private modifier.

Non exist following properties;

pClass.IsInternal
pClass.IsPrivate
pClass..IsAssembly

can i dynamicly access object from name of object

combo_ci23-Dec-09 7:20

combo_ci

23-Dec-09 7:20

hi i have 2 form in my program
publis object from form2 for example "Frm_User" that new in load of mainform and have a filed for example "AllowEdit"
i can access to this filed by Frm_User.AllowEdit
but i want to find a way that access "AllowEdit" by know name of this filed in other form

it mean that i want find a way to dynamically access obj of form2 "Frm_User" by Name and then change that field in mainForm

can any one help me

thnx

Re: can i dynamicly access object from name of object

Jordon4Kraftd23-Dec-09 11:13

Jordon4Kraftd

23-Dec-09 11:13

Have you tried casting the object?

If the object is different everytime and you can't edit the objects to use an interface with "allowEdit" then maybe you can try using "reflection" methods to get access.

Look up those things then ask for specific help.

Re: can i dynamicly access object from name of object

combo_ci23-Dec-09 19:49

combo_ci

23-Dec-09 19:49

i know with reflection we can access all property and method with the instance of the object
but my problem is i want to create instance of instance of the object from a string that contain name of that object
for example :
i know that object of from2 is "Frm_User" and string whith this code

string temp="Frm_User";

can i access the object of form 2 with temp?and change property and and field of that?

Re: can i dynamicly access object from name of object

Luc Pattyn24-Dec-09 1:48

Luc Pattyn

24-Dec-09 1:48

Have a look at Activator.CreateInstance().

Smile | :)

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Re: can i dynamicly access object from name of object

softty24-Dec-09 1:22

softty

24-Dec-09 1:22

You can probably, expose AllowEdit through a public property and set it from your code

love2code

How to show all surfaces of a cube?

whiteclouds23-Dec-09 5:48

whiteclouds

23-Dec-09 5:48

Hi everyone!
I am a new one to DirectX. Now I want to draw a cube on Windows Mobile. The language I used is C#, and I want to use DirectX technology. I had already drawn every surface. These surfaces can be shown individual. But when I write these datas into a buffer altogether for showing all surfaces, only the first surface can be drawn. Other surface dispear. I don't know the reason. I hope someone could be kind to help me. Thx!

There is some white cloud floating on the blue sky. That's the landscape I like.

how to create 2 threads on on diferent procesors

Renven23-Dec-09 4:29

Renven

23-Dec-09 4:29

hi guys,
I need your help.
let's suppose I have Dual-Core CPU and I need know how to create two threads, each in different processor.
for example:
thread1 runs in 1core
thread2 runs in 2core

when implementing tread1.start(); thread2.start(); they both run some random function lake NumberTest();

Thanks in advance,
renven

Re: how to create 2 threads on on diferent procesors [modified]

#realJSOP23-Dec-09 5:31

#realJSOP

23-Dec-09 5:31

~~Thread.SetProcessorAffinity()[^]~~

It appears as if threading in .Net already distributes multiple threads across all available processors/cores, so you don't appear to have to worry about it.

.45 ACP - because shooting twice is just silly
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modified on Wednesday, December 23, 2009 10:49 AM

Re: how to create 2 threads on on diferent procesors

Ghydo23-Dec-09 5:39

Ghydo

23-Dec-09 5:39

This is surely a better solution than mine! Smile | :)

Re: how to create 2 threads on on diferent procesors

#realJSOP23-Dec-09 5:39

#realJSOP

23-Dec-09 5:39

Then vote it a good answer. Smile | :)

Re: how to create 2 threads on on diferent procesors

Ghydo23-Dec-09 5:47

Ghydo

23-Dec-09 5:47

Wait, re-reading carefully the documentation it seems that it is only for XNA and XBox360. I tried a small test program and the Thread.SetProcessorAffinity does not exist in the standard 3.5 .NET framework. Am I missing something obvious? Confused | :confused:

Re: how to create 2 threads on on diferent procesors

#realJSOP23-Dec-09 5:51

#realJSOP

23-Dec-09 5:51

You're right, and I changed my answer.

Re: how to create 2 threads on on diferent procesors

Eddy Vluggen23-Dec-09 6:01

Eddy Vluggen

23-Dec-09 6:01

Sounds more logical too; imagine all applications dividing their affinity over two cores. You'd freak out if your computer has four cores, as two would be consistently ignored Smile | :)

The CPU-affinity can be set by the end-user over the task-manager, if there's a need to do so.

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Re: how to create 2 threads on on diferent procesors

Ghydo23-Dec-09 5:38

Ghydo

23-Dec-09 5:38

C# seems not to support the feature you are requiring, you should use some Interop to do it.
This snippet should do the work (I found it here[^], I didn't tested it.

class Program
{
	[DllImport("kernel32")]
	static extern int GetCurrentThreadId();
	static void Main()
	{
		Thread t = new Thread(
		new ThreadStart(DoWork));
		t.Start();
		t.Join();
	}

	static void DoWork()
	{
		foreach(ProcessThread pt in Process.GetCurrentProcess().Threads)
		{
			int utid = GetCurrentThreadId();
			if (utid == pt.Id)
			{
				pt.ProcessorAffinity = (IntPtr)(1); // Set affinity for this thread to CPU #1
				Console.WriteLine("Set");
			}
		}
	}
}

But why do you want to change the thread affinity? The scheduler should automatically take advantage of both CPU cores.

Re: how to create 2 threads on on diferent procesors

Luc Pattyn23-Dec-09 6:39

Luc Pattyn

23-Dec-09 6:39

Hi,

don't worry about which processor executes which thread; setting processor affinities isn't necessary at all. If you let everything run without "helping" it, Windows will assign threads to processors dynamically (which means a thread once blocked for some reason might continue on another processor), with some retention as to preserve cache efficiency. It is only in very special cases that you could improve on the automatic assignment.

Smile | :)

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sqlite

jashimu23-Dec-09 4:24

jashimu

23-Dec-09 4:24

Hi All, I am trying to do some query in my sqlite database. I wanted to get average of some number, but could not do it.
if you please can, write a sql statement that get average of some number.
"SELECT AVE(w)FROM x WHERE y = z ";
It should return the ave of all w.

thanks in advance

Re: sqlite

Keith Barrow23-Dec-09 4:28

Keith Barrow

23-Dec-09 4:28

This belongs to the "General Database" forum, this is the C# forum.

I suggest you post there and delete this post.

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Re: sqlite

Md. Marufuzzaman23-Dec-09 4:41

Md. Marufuzzaman

23-Dec-09 4:41

jashimu wrote:
"SELECT AVE(w)FROM x WHERE y = z ";

This transact sql statement will be
"SELECT AVG(w)FROM x WHERE y = z ";

Thanks
Md. Marufuzzaman

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Webpartzone

NETLearning23-Dec-09 4:02

NETLearning

23-Dec-09 4:02

How do i change the title of the webpartzone.
It is keeping the ID of the webpartzone as the name

Re: Webpartzone

EliottA23-Dec-09 4:19

EliottA

23-Dec-09 4:19

Ok. Good question, or, what the hell is a webpartzone?

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Re: Webpartzone

NETLearning23-Dec-09 4:50

NETLearning

23-Dec-09 4:50

use webpart in ASP.NET to drag and drop controls.
Webpartzones are the zones in which webparts are created.
My question how do you change the webpart zone name or even
remove the title of the webpart zone

Re: Webpartzone

EliottA23-Dec-09 4:52

EliottA

23-Dec-09 4:52

Ah, so it's an asp.net question. Good, ask in the ASP.NET forum, you will get a (better) answer there.

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[Message Deleted]

Tichaona J23-Dec-09 3:56

Tichaona J

23-Dec-09 3:56

[Message Deleted]

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