C# Discussion Boards - CodeProject

gnjunge23-Aug-05 7:45

23-Aug-05 7:45

Check http://www.pinvoke.net/search.aspx?search=internet&namespace=[All][^] for a bunch of Win API's that deal with internet connectivity.

If I remember it well you want the InternetGetConnectedState API, that you can find in the above stated list.

Passing values to methods.

zaboboa23-Aug-05 6:05

zaboboa

23-Aug-05 6:05

Hello,

I have in the declaration:

private Control[] allocGrading;

Then in one of my methods I have a call to another method in which I am passing the ControlArray:

this.SetupStageAllocation(this.allocGrading);

.....

private void SetupStageAllocation (Control[] controlArray)<br />
{<br />
<br />
controlArray = new Control[numStages];<br />
// Do some stuff<br />
}<br />

However, my declaration of allocGrading still remains null, and I want to pass the value of Control array to SetupStageAllocation by reference, because all the Control[] will be setup in the same way. Any ideas what I am missing?

Thank you

Re: Passing values to methods.

Werdna23-Aug-05 6:26

Werdna

23-Aug-05 6:26

you need to declare your method to take array by ref

private void SetupStageAllocation (ref Control[] controlArray)
{

controlArray = new Control[numStages];
// Do some stuff
}

this.SetupStageAllocation(ref this.allocGrading);

Re: Passing values to methods.

zaboboa23-Aug-05 6:39

zaboboa

23-Aug-05 6:39

Thanks a lot, but I already figure that one out.

Re: Passing values to methods.

Guffa23-Aug-05 7:02

Guffa

23-Aug-05 7:02

If the method always creates a new array, it's better to make the method return the array instead:

this.allocGrading = this.SetupStageAllocation();

private Control[] SetupStageAllocation() {
	Control[] controlArray;

	controlArray = new Control[numStages];
	// Do some stuff
	return controlArray;
}

---
b { font-weight: normal; }

Re: Passing values to methods.

Matt Gerrans23-Aug-05 9:43

Matt Gerrans

23-Aug-05 9:43

I agree with Guffa. If you start getting used to passing by reference all over the place, it will soon get out of hand.

Matt Gerrans

Newsletter/Massemail

cyonite23-Aug-05 6:04

cyonite

23-Aug-05 6:04

Hi Im trying to find information about how to implement a massemailer. I've got a site that needs to be able to send out alot of emails (not spam). My current solution works for 400 recipients but more than that it starts to freak out. Been thinking of splitting the recipients into various groups and have threads sending them out, but I really doesnt know where to start here.

Do you guys/girls out there have any information on where to find a tutorial or something similiar regarding this kind of email stuff? Buying is also an option if the product is fairly cheap and good.

System.Diagonastics.Process.GetProcesses throws error if the user does not have admin rights.

manivannan.p23-Aug-05 5:14

manivannan.p

23-Aug-05 5:14

Hi,

I get error
"Couldn't get process information from remote machine" when i try to run Process.GetProcesses().I understand that this is because i dont have administration rights.How can i solve this problem.Is there a way where in i can give some permissions to the user to execute that part of code alone.

Hope to get replies soon.
Thanks

Re: System.Diagonastics.Process.GetProcesses throws error if the user does not have admin rights.

Judah Gabriel Himango23-Aug-05 5:19

Judah Gabriel Himango

23-Aug-05 5:19

I don't think so. You could try building that functionality into a seperate program, then launch that program with Administrative permissions (provided either you know an admin's name & pass, or the user fills it in for you).

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Who is Jewish, the Trivia Game!
Judah Himango

Re: System.Diagonastics.Process.GetProcesses throws error if the user does not have admin rights.

manivannan.p23-Aug-05 18:45

manivannan.p

23-Aug-05 18:45

I guess i havent explained the case properly.
I have a program where i try to get the processes running in the machine through GetProcesses().I connect to a remote machine using a user who doesnt have admin rights.When i run the program from the remote machine i get error saying "Couldn't get process information from remote machine" additional info :"Access is denied". I cannot give admin rights to this user but i stil want the program to return me the processes through GetProcesses().Is there a way to give access permission through the code , such that i get the processes even though the user does not have admin rights.

thanks

Dynamic Event Handler

pssuresh23-Aug-05 4:52

pssuresh

23-Aug-05 4:52

Menu Item names are directly coming from the database and i want to attach menu item with the event handler names.
so i name event handler as "handle" + item.name(value from database) + "click".I want to attach it dynamically.

the code is as follows

//sample code
public class myclass
{

protected void Handle_FileMenuItem_Click(System.Object sender, System.EventArgs e)
{

}

public bindeventhandler()
{
string dynamiceventhandler="";
dynamiceventhandler="Handle_" + item.Name + "_Click";
Delegate temp=Delegate.CreateDelegate(typeof(EventHandler),this,dynamiceventhandler);
item.Click+=(EventHandler)temp;

}

}

The code is throwing error. Error binding to target method.

Can anyone pl explain how to solve this error...

i got the idea from this url

http://www.dotnet247.com/247reference/msgs/21/106638.aspx

Re: Dynamic Event Handler

SeMartens23-Aug-05 5:12

SeMartens

23-Aug-05 5:12

Hi,

I tried your provided code and it works just fine. Did you verified that the value of item.Name is e.g. FileMenuItem?
Do you have a target method for all items that wil be binded ?

Regards
Sebastian

IIS virtual Directory

C0d3_P03t23-Aug-05 4:26

C0d3_P03t

23-Aug-05 4:26

Can anyone tell me or show me how can i delete a virtual directory from IIS, urgent

thanks

Regards,
Luke

Re: IIS virtual Directory

BammBamm23-Aug-05 5:34

BammBamm

23-Aug-05 5:34

How about right click, select delete.

Re: IIS virtual Directory

Sarvesvara (BVKS) Dasa23-Aug-05 16:50

Sarvesvara (BVKS) Dasa

23-Aug-05 16:50

The IIS control - you can find it under the "Administrative Tools" of the PC / server where the IIS is hosted....

"He that is good with a hammer tends to think everything is a nail."
- Abraham Maslow

Re: IIS virtual Directory

C0d3_P03t23-Aug-05 23:41

C0d3_P03t

23-Aug-05 23:41

Programmaticly i meant,
If not programaticly i wouldnt have posted it on the C# forum innit?

Regards,
Luke

SerializationException With DataTable

Wender Oliveira23-Aug-05 4:06

Wender Oliveira

23-Aug-05 4:06

Hello, I'm trying to access a DataTable from a Typed Dataset through Remoting but when I call my method it throws the follow exception:

[SerializationException] The constructor to deserialize an object of type
TBPerfilDataTable was not found.

But, when I try to return the full filled typed dataset it works... It only doesn't works with DataTables.

Any idea?

Wender Oliveira
.NET Programmer

Re: SerializationException With DataTable

SeMartens23-Aug-05 4:21

SeMartens

23-Aug-05 4:21

Hi Wender,

I'm not really sure if the TBPerfilDataTable class needs to have a default constructor (without any parameters). If I access an object using serialization (e.g. by using a WebSerice), the serialized class always needs a constructor without parameters.

Is your datatable marked as serializable ?

Regards
Sebastian

Trying to be a .NET Programmer Wink | ;-)

Re: SerializationException With DataTable

Wender Oliveira23-Aug-05 4:48

Wender Oliveira

23-Aug-05 4:48

Sebastian, thanks for your attention

First it throws an exception about Serializable Attribute not found, so, I marked all my datatable classes as [Serializable()]. Then, I tried again and got that exception. I tried to reimplement ISerializable interface but I didn't understande how to do this.

Wender Oliveira
.NET Programmer

Re: SerializationException With DataTable

miah alom23-Aug-05 4:39

miah alom

23-Aug-05 4:39

If you are deriving from the DataTable class, then you must add the following code

protected MyDataTable(SerializationInfo info, StreamingContext context):base(info, context)
{
}

Re: SerializationException With DataTable

Wender Oliveira23-Aug-05 7:23

Wender Oliveira

23-Aug-05 7:23

Thanks, I didn't try but it seems to work.

I did an workaround and now works... Smile | :)

Tks...

Wender Oliveira
.NET Programmer

DirectX getting bogged down with nothin to do? - C#

YawgmothIII23-Aug-05 3:41

YawgmothIII

23-Aug-05 3:41

Hello,

I've been programming a C# game engine, mainly just for fun and learning purposes. The project is going very well and i've learned alot seeing as this is my first time working with DirectX, but even though the project is going well i continuously run into the same problem.

I'm building my Engines around the idea of an RTS game and i have 3 seperate engines. The Game Engine(master) and then 2 lower engines the Sprite Engine(DirectDraw) and my Object Engine(Manages Units).

Since i'm still testing things there are times when there are no units on the screen. If this happens and i don't have any debug information being drawn then it begins to lag extremely. Its obviously hard to tell whats going on because it only does it when theres a blank white screen displayed, but i first noticed it in how laggy the responses are in the keyboard.

I'm at a total loss as to why giving DirectX nothing to do would lag my program? any ideas?

Heres a segment of my code from the Sprite engine that actually draws stuff on the screen:

back.ColorFill(Color.White);<br />
				// Draw the Object to the back buffer using source copy blit<br />
				<br />
				for (int i=0; i <= AnimQPt; i++)<br />
				{<br />
					for (int z=0; z <= AnimQ[i].spriteCluster.TotalSprites; z++)<br />
					{<br />
						back.DrawFast(AnimQ[i].spriteCluster.sprites[z].point.X, AnimQ[i].spriteCluster.sprites[z].point.Y, Models[AnimQ[i].intModelID].Sprites[AnimQ[i].spriteCluster.sprites[z].SpriteID].SpriteSurface, AnimQ[i].spriteCluster.sprites[z].rectangle, DrawFastFlags.SourceColorKey);<br />
					}<br />
				}<br />
				if (bObjectNumDisplay)<br />
				{<br />
					for (int i=0; i <= AnimQPt; i++)<br />
					{<br />
						back.DrawText(AnimQ[i].pointDisplay.X, AnimQ[i].pointDisplay.Y, AnimQ[i].intUnitID.ToString("N0"), false);<br />
					}<br />
					back.DrawText(10, 10,"ScreenWidth = " +Screen.Width.ToString()+ "  ScreenHeight = " +Screen.Height.ToString()+ "  XPos = " +AnimQ[0].pointDisplay.X +"  YPos = " +AnimQ[0].pointDisplay.Y +"  Current Point = " +this.AnimQ[0].spriteCluster.sprites[0].rectangle.ToString() + " ElapsedTime = " +this.AnimQ[0].pointDisplay.ToString(), false);<br />
				}

The variable AnimQPt would normally be -1 if there are no units on the screen.

Re: DirectX getting bogged down with nothin to do? - C#

Judah Gabriel Himango23-Aug-05 5:15

Judah Gabriel Himango

23-Aug-05 5:15

How are you rendering the scene - a OnPaint->Invalidate() call (thus making OnPaint be called over and over again)? If so, that could be a cause of your problems; doing OnPaint and Invalidate is extremely inefficient, lots of overhead. It wasn't meant to be used in this manner.

Check out Managed DirectX creator Tom Miller's blog posting here[^] regarding the best, most efficient way to render your scene.

The other possibility is that you're doing something too heavy; too many allocations, too much drawing to the screen, too many garbage collections going on. It's tough to say without a knowledge of the codebase.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Who is Jewish, the Trivia Game!
Judah Himango

No templates in C#

Tomerland23-Aug-05 2:49

Tomerland

23-Aug-05 2:49

Dear Gurus,

I have the following problem (reduced from more complicated stuff):

I want to process different types of data in a class (in the example I simply store the data).

The problem here (in C#) to my best understanding is, that I have to write an extra function for each data-type. This can be much more easily managed in C++ via Templates.

How do I manage such a problem in C#?

Class-Example:

   public class Action    {<br />
<br />
        public void storeValue(int    i)   {  m_intValue    = i;   }<br />
        public void storeValue(char   c)   {  m_charValue   = c;   }<br />
        public void storeValue(double d)   {  m_doubleValue = d;   }<br />
<br />
        private     int     m_intValue;<br />
                    char    m_charValue;<br />
                    double  m_doubleValue;<br />
    }

Thank you for your help

Re: No templates in C#

mav.northwind23-Aug-05 3:11

mav.northwind

23-Aug-05 3:11

Hi!

Either you use .NET 2.0, where a template system is supported, or you use public void storeValue(object o) and sacrifice type-safety.

Nevertheless, you can query the real type of the object passed to your function using the typeof or is operators.

Regards,
mav

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