Reflection - C# Discussion Boards

31-Aug-05 9:19

Use PropertyGrid Winforms control
for more information look at
Bending the .NET PropertyGrid to Your Will
[^]
PropertyGrid Class[^]

MCAD

Open Graph via: icon

Debs*31-Aug-05 8:35

Debs*

31-Aug-05 8:35

I have a program that creates graphs which you can save and load.
I have successfully associated my icon to my program so that when I click on a graph file it opens the program Smile | :)

( in registry ie. "c:\...\...\program.exe "%1"") however it does not load my graph Frown | :(

I use the open file dialog do I need to write specific open file code?? Any thoughts would be great.
Cheers*
Debs*

Re: Open Graph via: icon

Mohamad Al Husseiny31-Aug-05 9:30

31-Aug-05 9:30

If you already associated your file type to your program
So did you handle the file path passed in main function?
ie the file you opened passed as command line argument to your program so you need to handle this issue
If you not associated your file type to your program by
using window explore or when you create setup project
use File Types Editor to do it

MCAD

-- modified at 15:30 Wednesday 31st August, 2005

Re: Open Graph via: icon

Debs*1-Sep-05 6:27

Debs*

1-Sep-05 6:27

hmm ok thanks for some direction, I don't think I handle command line arguments from windows Unsure | :~

... I'll have to read up on this any suggestions?
Debs

Play raw data

Niklas Ulvinge31-Aug-05 8:07

Niklas Ulvinge

31-Aug-05 8:07

How do I do to play a raw data?

Like the data that's in the data chunk in a wav file.
The other values could I fix later.

Niklas Ulvinge aka IDK

Reflection

Yoyosch31-Aug-05 7:23

31-Aug-05 7:23

Please tell me how to implement a method that will look to its own class and return (eg. an array) of all members of this class (its suppose to use reflection, this kind of reflection is called 'self' if I remember good...)

I tried something like that:

<br />
ble b = new ble();<br />
<br />
			Type t;<br />
			FieldInfo[] mi;<br />
			t = typeof(ble);<br />
			mi = t.GetMembers();<br />
<br />
			foreach(MemberInfo mem in mi)<br />
				this.listBox.Items.Add(mem.Name);<br />
<br />

and it wrote some strange stuff... I just want to have all the members of 'ble' class (eg. string s, int i, etc)

Andrew Kirillov31-Aug-05 10:13

Andrew Kirillov

31-Aug-05 10:13

Hello

Suppose we have the next class:

class A
{
	public int memberVariable;
	public void Method1() {}
	public void Method2() {}
}

And the next code somewhere:

Type type = typeof(A);

MemberInfo[] mis = type.GetMembers();

foreach (MemberInfo mi in mis)
{
	System.Diagnostics.Debug.WriteLine(mi.Name);
}

So, we'll get something like this in output window:

memberVariable<br />
GetHashCode<br />
Equals<br />
ToString<br />
Method1<br />
Method2<br />
GetType<br />
.ctor

What is wrong? You have all your own members and inherited members.

Andrew

Yoyosch31-Aug-05 11:46

31-Aug-05 11:46

My variables were private... there is no way ti display them?

Andy Brummer31-Aug-05 11:57

Andy Brummer

31-Aug-05 11:57

try

type.GetMembers(
           BindingFlags.NonPublic|
           BindingFlags.Instance|
           BindingFlags.Static
);

I can imagine the sinking feeling one would have after ordering my book,
only to find a laughably ridiculous theory with demented logic once the book arrives - Mark McCutcheon

Yoyosch31-Aug-05 12:02

31-Aug-05 12:02

thank you very much, this was exactly what I was looking 4

Yoyosch31-Aug-05 12:38

31-Aug-05 12:38

how to retrieve the type of each field? I mean, I would like to know that, for example, 's' is a string

further questions - is it possible to retrieve also information about arguments that funcion takes and the return type?

Werdna31-Aug-05 13:50

Werdna

31-Aug-05 13:50

Type type = typeof(A);<br />
MemberInfo[] mis = type.GetMembers();<br />
foreach (MemberInfo mi in mis)<br />
{	<br />
System.Diagnostics.Debug.WriteLine(mi.Name + ": " + mi.MemberType.ToString());<br />
}

Yoyosch31-Aug-05 14:15

31-Aug-05 14:15

it doesnt work - I tried and MemberType gives exactly the same as MemberType.ToString() - it gives only general info (method, field, etc) and I want detailed information (string, int, char, etc)

Windows Service arguments

Andy Brummer31-Aug-05 18:01

Andy Brummer

31-Aug-05 18:01

You want ReflectedType. All your questions can be answered by MSDN[^] though.

I can imagine the sinking feeling one would have after ordering my book,
only to find a laughably ridiculous theory with demented logic once the book arrives - Mark McCutcheon

vSoares31-Aug-05 7:01

vSoares

31-Aug-05 7:01

Hi all,

I've built a Windows Service wich accepts arguments in the main function so I can execute the exe like <code>MyWindowsServ.exe –install</code>.

I can install the service, I can run it, and everything runs ok.

Now, what I wanted to do was to install the service so when it starts it can take some arguments as well.

If you look at the COM+ Event System service properties (for instance) in your control panel, you can see that the path to executable is something like this <code>C:\WINDOWS\system32\svchost.exe -k netsvcs</code>

Is there a way I can add these arguments to my ProcessInstaller or ServiceInstaller or something like that?

Thanks,

<i>vSoares</i>

Re: Windows Service arguments

Mohamad Al Husseiny31-Aug-05 7:18

31-Aug-05 7:18

You can pass startup parameter to windows service but however rather than acceptin arguments in Main Method Windows service accept arguments and handle them in OnStart MethodTo setup startup parameter
Open the windows Services MMC snap-in
Select your Service->Properties-->General
You will find Start Parameters you can write your start parameters in it To add this information when you install windows service you have to write start parameters in registry under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
start up parameter stored in ImagePath

There are some articles at codeproject about custom installation of Windows service like
Install Service Using Script[^]
ServiceInstaller Extension That Enables Recovery and Autostart Configuration
[^]
Install a Windows service the way YOU want to[^]
MCAD

-- modified at 14:58 Wednesday 31st August, 2005

Old C New C#

buggity31-Aug-05 5:51

buggity

31-Aug-05 5:51

I would like to be able to use some old ANSI C functions but have access to them using a new GUI built in C#. Basically I'm trying to take a comsole app and make it windows based. Is there anyway to do this? I have tried adding the reference but, even though the code is compiled under .NET, it doesnt seem to like it. ANy suggestions? Or am I SOL?

Thanks in advance
Mark

Re: Old C New C#

Mohamad Al Husseiny31-Aug-05 6:17

31-Aug-05 6:17

put your c code in dll and use this dll in your c# code
P/Invoke will help you to do this
look at question titled using c++ dll in this forum page
i provide link to P/invoke article

MCAD

method

HFreitas31-Aug-05 5:30

HFreitas

31-Aug-05 5:30

hi all i´m a little new in c# and i am having problem doing some programming

the question is: implement a method that returns an average of set variavel of arguments in integer type
can anyone help

it is quite simple but not for me

Yoyosch31-Aug-05 6:01

31-Aug-05 6:01

1. What do you mean by 'set' of arguments?

2. What kind of average? There is several differend kinds of average value...

Judah Gabriel Himango31-Aug-05 6:23

Judah Gabriel Himango

31-Aug-05 6:23

So, let's say you have a set of an unknown number of arguments

void Test(params int[] arguments)
{
}

You could compute the average by using something like

// first, get the sum of all the numbers
int sum = 0;
foreach(int i in arguments)
{
    sum += i;
}

// then, divide the sum by the number of arguments to return the average
int average = sum / arguments.Length;

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Cops & Robbers
Judah Himango

Mohamad Al Husseiny31-Aug-05 6:26

31-Aug-05 6:26

To pass Variable Parameters to method use params keyword For example

public int GetAverage (params int[] nums)
{
// put your code here
//you can get the number of parameter passed
//by calling nums.GetLength

}

MCAD