C# Discussion Boards - CodeProject

topksharma198215-Jun-07 8:48

topksharma1982

15-Jun-07 8:48

Hi Respected Sirs,
sir i have to develop a unicode symbol dialog like in MS Word , i have done it , i have a panel in my form and again a panel inside first panael i m drawing rectangles in this second panel , i have a combobox for all the languages , now when i click in combobox it shows me all the languages and drwas the characters now when i click on a language in combobox and click on the second panel it doesn't shows me the characters in the area where combobox is i mean the drop area of combobox which is over the second panel . pls help to get rid of this problem.

Pravo

socket server

topksharma198215-Jun-07 8:40

topksharma1982

15-Jun-07 8:40

hi sirs,
i m praveen a new c# programmer , i have to develop a chat server in c# using Socket not TcpListener , now i don't know how to make my socket which can listen infinite number of clients i can do it with infinite while loop but its not working pls provide me some code , how to do it .
Thanx a lot for all of u .

Pravo

Scrollable and Moveable Frames

Syed Shahid Hussain15-Jun-07 7:58

Syed Shahid Hussain

15-Jun-07 7:58

Hi I think you all viewed that in "My Computer" window (WinXP) at very side some frames are there.

These frames/Groups are scrollable and moveable automatically.

Is there any C# equivalent frame. I love to use it in my application.
Reply please;

Sniff | :^)

Regards.

Syed Shahid Hussain

Re: Scrollable and Moveable Frames

Tarakeshwar Reddy15-Jun-07 8:15

Tarakeshwar Reddy

15-Jun-07 8:15

Do you mean the collapsible panels?

XP style collapsible panel[^]

Re: Scrollable and Moveable Frames

Syed Shahid Hussain15-Jun-07 14:58

Syed Shahid Hussain

15-Jun-07 14:58

Thanks a lot Dear Friend. I really need it. Now I'll check it that how optimized that control is because I've seen a pannel control before that had some threading problem......

Any way really thanks for ur assistance.

God Bless You.

Syed Shahid Hussain

A concepteual question

Amar Chaudhary15-Jun-07 6:56

Amar Chaudhary

15-Jun-07 6:56

What would be the output of following question

<code>
using System;


namespace Statements
{
    class Class1
    {
        public int Value = 0;
    }

    class Test
    {
        static void Main()
        {
            Class1 e = new Class1();
            Class1 f = e;

            e.Value = 1;
            f.Value = 5;
            
            Console.WriteLine(e.Value.ToString() + " " + f.Value.ToString());

            Console.WriteLine((object)e.Value == (object)f.Value);
            Console.WriteLine((object)e == (object)f);
            Console.WriteLine(e == f);
            
            Console.ReadLine();
        }
    }

}
</code>

try giving the output manually (i got it wrong Blush | :O

)

And please explain your answer

Re: A concepteual question

bolhassanim@bellsouth.net15-Jun-07 7:12

bolhassanim@bellsouth.net

15-Jun-07 7:12

When you instatiate f, f.value is = 0 and f acts as a pointer to object e.
e.Value = 1; does not have any impact and it Value takes the second assignment value.
therefore

e.Value = f.Value = 5
False
TREU
TRUE

Re: A concepteual question

Shy Agam15-Jun-07 7:15

Shy Agam

15-Jun-07 7:15

Here's my answer (not tested):

5 5
False
True
True

5 5:
You instantiate one object, and reference it from two variables.
That's why when you change the Value field by either of the references the changes are "reflected" in the other reference variable.

False:
The Value field is a value-type member.
This means that casting it to an object, demands boxing, which results in the creation of two completly different objects, holding the same numeric value.

True:
It doesn't matter if you cast an object to its parent type.
It still points to the same object in memory.
So its simply doing a reference comparison.

True:
You set both reference variables to point to the same object in memory, and the "==" operator compares their references.

Corrections? Opinions?

Smile | :)

Regards,
Shy.

Re: A concepteual question

Amar Chaudhary15-Jun-07 7:25

Amar Chaudhary

15-Jun-07 7:25

Correct Answer is
5 5
False // here i was wrong
True
True

Thanks for Explanation
Regards
Amar

Non-order-dependent deserialization of objects

Shy Agam15-Jun-07 6:36

Shy Agam

15-Jun-07 6:36

Hello,

If I serialize multiple objects to the same file, is it possible to somehow deserialize them not in the same order?

Thanks in advance,
Shy.

Memory leak issue, memory management of unmanaged code

logicaldna15-Jun-07 6:34

logicaldna

15-Jun-07 6:34

hi
i'm having a issue with memory management in a COM which uses MSXML (cause of memory leak)
if i use a c# wrapper around the COM which is then called from .net webservice will CLR take care of memory management for me( essentially Garbage collection)

if not by design can i force GC to take care of memory leaks in COM
this is very urgent, please help ! Cry | :((

sorry i'm posting it in different forums at a time but hope you will see a desparation :->

Chase your dreams !
http://eminencetech.net[^]

Re: Memory leak issue, memory management of unmanaged code

Shy Agam15-Jun-07 6:39

Shy Agam

15-Jun-07 6:39

The GC does not re-claim unmanaged memory.

Regards,
Shy.

Re: Memory leak issue, memory management of unmanaged code

logicaldna15-Jun-07 6:42

logicaldna

15-Jun-07 6:42

thanks for the reply,
but can i force it in anyway, is it possible if i use COM as RCW

Chase your dreams !
http://eminencetech.net[^]

Re: Memory leak issue, memory management of unmanaged code

Shy Agam15-Jun-07 7:00

Shy Agam

15-Jun-07 7:00

You cannot force the GC to collect objects from unmanaged memory.
The GC works only on objects created by the CLR.
Hence the expression "UNMANAGED memory". Smile | :)

If your COM object contains cleanup methods, use them.

logicaldna wrote:
is it possible if i use COM as RCW

Sorry, but I don't think I know what RCW means...
Maybe someone else here can help you with that.

Re: Memory leak issue, memory management of unmanaged code

logicaldna15-Jun-07 7:04

logicaldna

15-Jun-07 7:04

shyagam wrote:
If your COM object contains cleanup methods, use them

i have tried all and even COuninitialize is not cleaning the memory dam this MSXML Confused | :confused:

thanks anyways
sagar

Chase your dreams !
http://eminencetech.net[^]

Re: Memory leak issue, memory management of unmanaged code

Jimmanuel15-Jun-07 7:19

Jimmanuel

15-Jun-07 7:19

When using COM objects in C# setting an object to null isn't all that's required to signal it ready for Garbage Collection. First a call must be made to Marshal.ReleaseComObject(aComObjectVariable) to decrement it's reference counter in the RCW.

MSDN[^]

Re: Memory leak issue, memory management of unmanaged code

Paul Conrad15-Jun-07 13:57

Paul Conrad

15-Jun-07 13:57

logicaldna wrote:
i'm posting it in different forums at a time

That's not polite and it gets people ticked off and less likely to respond.

"You will see a delete button on each of your posts. Press it." - Colin Angus Mackay

Appconfig File Entry

ramdil15-Jun-07 6:12

ramdil

15-Jun-07 6:12

Hi All,
I am new to c# and i am currently facing a problem in writing to a app config file.I am able to write to a config file if its read only access property is removed.Is there any way to give write permissions to the config file programatically.

Regards
DilipRam

Re: Appconfig File Entry

Jimmanuel15-Jun-07 8:49

Jimmanuel

15-Jun-07 8:49

try

File.SetAttributes(fileName, FileAttributes.Normal);

Re: Appconfig File Entry

ramdil17-Jun-07 22:56

ramdil

17-Jun-07 22:56

Thanks very much..Its working now

Regards
Dilip

Regards
DilipRam

Propety grid

half-life15-Jun-07 6:09

half-life

15-Jun-07 6:09

HI,
i like to know two things :
1. how do i add an Attribute to the Propety grid.
2. how do i add the + in a specific Attribute.

TNKS Smile | :)

kobkob

Trace.Writeline not visible under Vista?

LongRange.Shooter15-Jun-07 5:44

LongRange.Shooter

15-Jun-07 5:44

I have a service loader that issues Trace.Writeline as the servicehosts are loaded. When I ran it under Windows XP everything works as expected. When I run it under Vista in debug mode, dbgView does not see the trace messages.

Does anyone know what I have to do from a policy end to get these messages viewable?

Thanks.

DataGridView custom events

jesarg15-Jun-07 5:15

jesarg

15-Jun-07 5:15

I have recently created a custom DataGridView column type (with my own custom cell type and custom control type inside).

I am trying to make my own custom events to go with the cell/column type, but apparently, the DataGridView was implemented quite strangely, and I'm getting event handlers that should be attached once become attached multiple times, never, or in an inconsistent manner.

Has anyone ever run into this before, and is there any good resource that could help me with this?

UnregisterTypeLib

Zebpic15-Jun-07 2:41

Zebpic

15-Jun-07 2:41

Hello,

I'm writting an application which check the dependency of imports. I have to register some typelibs for this import. After the analysis i want to unregister these typelibs.
But it doesn't work and I don't know why.

This is the exception: "The structure must not be a value class"

Please help me.

Here is my code that doesn't work

<br />
        [DllImport("oleaut32.dll", CharSet = CharSet.Unicode, PreserveSig = false)]<br />
        private static extern void UnRegisterTypeLib(Guid libID,<br />
        ushort wVerMajor,<br />
        ushort wVerMinor,<br />
            LCIDConversionAttribute lcid,<br />
             System.Runtime.InteropServices.ComTypes.SYSKIND syskind);<br />
<br />
<br />
// The struct<br />
<br />
        [StructLayout(LayoutKind.Auto)] <br />
        struct Attr <br />
        {<br />
            public Guid libID;<br />
            public ushort wMajorVerNum;<br />
            public ushort wMinorVerNum;<br />
            public LCIDConversionAttribute lcid;<br />
            public System.Runtime.InteropServices.ComTypes.SYSKIND syskind;<br />
        }<br />
<br />
<br />
<br />
// the code in an methode<br />
typeLib.GetLibAttr(out ppTLibAttr);<br />
<br />
               // Marshal.GetTypeLibGuid();<br />
                Attr structTlb = new Attr();<br />
                <br />
<br />
                Marshal.PtrToStructure(ppTLibAttr, structTlb);<br />
<br />
                UnRegisterTypeLib(structTlb.libID, <br />
                    structTlb.wMajorVerNum, <br />
                    structTlb.wMinorVerNum, <br />
                    structTlb.lcid, <br />
                    structTlb.syskind);<br />

I hope it helps?!

How to add Animation ASP.Net 2.0

khuzwayom15-Jun-07 2:36

khuzwayom

15-Jun-07 2:36

Another one. I would like to know how to add animation on my web page.
I'm using ASP.Net 2.0 (C#)

khuzym

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.