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Thank you all, i solved the problem , thanks alot for your advices  
joly_1
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Imagine a 60 lined text File.
i wanna add a word to 45th line
then i wanna add another word to 13th line
then i wanna add another word to 28th line
All numbers is random. How can achive that?
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Given how files are stored on the hard-disk, it may be possible to insert data at random position into a file.
How the files are actually stored is determined by the filesystem used.
That means, unless you are writing very specific code for one filesystem, it is almost impossible to insert data at random positions.
There is, of course, a solution to this problem:
Rewrite the file. Read it, manipulate and save it, delete the original file and rename the output-file you just wrote.
If you need to do a lot of file manipulations, check if a database would not be a better approach. If you are certain that it is not, try to delay all manipulations. That is, write a buffer which will contain all changes not yet written to a file and which will "reroute" all read and write request to those positions to a memory location, not the file.
Then - maybe every 5 minutes - commit these changes to the disc.
Cheers,
Sebastian
--
Contra vim mortem non est medicamen in hortem.
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You'll have to read the entire file and rewrite it. During which you'll have to pause, write out the string you want to insert, then resume rewriting the file 'til the end.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I have got the client site pointer in C# using
Type typeIOleObject = this.GetType().GetInterface("IOleObject", true);
//call the method on that interface
oleClientSite = typeIOleObject.InvokeMembe("GetClientSite",
BindingFlags.Instance|BindingFlags.InvokeMethod|BindingFlags.Public,null, this, null);
where this is System.Windows.Forms.UserControl
now i want to marshal that object oleClientSite to send it to another thread.
in C++ we use CoMarshalInterThreadInterfaceInStream to convert that interface to stream and send that stream to another thread where we call CoGetInterfaceAndReleaseStream to get interface pointer from that stream.
i want the alternative for that in C#, that how can i marshal that interface and get that in the other thread.
one way is to use win32 API in C# but i am getting error using this in C#.
HRESULT CoMarshalInterThreadInterfaceInStream(IN REFIID riid, IN LPUNKNOWN pUnk,OUT LPSTREAM *ppStm);
in C# i have used this as
[DllImport("Ole32.dll")]
public static extern IntPtr CoMarshalInterThreadInterfaceInStream(
Guid riid,
[MarshalAs(UnmanagedType.IUnknown)]
object pUnk,
out object ppStm);
but it returns the error code -2147024809 which means that "The parameter is incorrect".
can someone plz tell me whats the alternate for CoMarshalInterThreadInterfaceInStream and
CoGetInterfaceAndReleaseStream in C#
or how can i make that dllimport call correct
thanx in advance.
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I want to use VI in a context menu, but it doesn't seem to work.
In my base class I have a context menu, which is set to protected.
In my derived class designer, I can see the context menu and add things to it.
When I compile the code and show the context menu, only the original items appear.
In the derived class' InitializeComponent function, I can see the new menu item being created, but it never gets attached to the base class context menu.
Is this a bug in VS2005?
I can bypass this problem by desiging a seperate context menu and adding it to the base class during the constructor, but it doesn't feel quite right to me.
Am I doing something else wrong?
Neil
No sharp objects, I'm a programmer.
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I need to write an addin for outlook that grabs the text string from the subject box in a reminder and copies that code to a notepad file. For example when the reminder is executed the addin will write the subject text to a file. I need this addin for part of my project, does anyone know where i can get some code to do this for me or has anyone got any ideas on how to write the code for this??? Any help would be greatly appreciated.
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hi guys,
i need to autostart my c# windows application upon boot time of the pc. is it possible using windows service? if not, what are other ways of doing it? tnx...
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Lot of ways...
(*) You can have a shortcut to the application in the Users->Startup folder in STart Menu or (AllUsers -> Startup folder, to affect all users. I think for the latter you need to have Administrative Privileges on the system).
(*) You can have a entry in HKLM->Sofware->Microsoft->Windows->CurrentVersion->Run
(*) You can configure your application as a Windows Service itself. Developing a Windows Service in C# and deploying them is a breeze. A lot of samples anyway.
I think the first two are logon based. Some user should logon for the app to launch. The latter, by virtue of being a Windows Service, would start immediately on system boot.
Vasudevan Deepak Kumar
Personal Web: http://www.lavanyadeepak.tk/
I Blog At: http://deepak.blogdrive.com/
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thanks for the immediate response. when i will develop a windows service, is it possible to have a method from the service that will call a c# windows app to run? i need this because i need to generate message prompts to the users in the network... i know with the other two methods, i can do this, but im not sure if it can be done using windows service and another c# app. tnx
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I think you can run an application from a service, but usually the service will not have the right to interact with the desktop, so expect your WindowsForms application to crash as soon as it tries to open a window.
Regards,
mav
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What about the autoexec.bat file 
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You mean placing a call to a .NET application inside autoexec.bat? 
One word: Don't.
The solutions given so far are about the only options you have available. First you have to decide whether you want your program to run when the system is started (then use a service) or if you want it to run when a user logs in (then you can use the other two methods).
But nevertheless, for a windows service to run nobody has to be logged on so you usually don't have a desktop to perform user interaction with.
You _can_ allow a service desktop interaction, though.
But allowing this is usually considered bad style.
Regards,
mav
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You can also try to
- use Win.ini (from good Win 3.11 times)
- write a Windows Explorer extension that starts your application
- replace a process used by the system with a modified version. On XP, you need to disable system restore for this.
- find more strange autostart locations
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Daniel Grunwald wrote: - replace a process used by the system with a modified version. On XP, you need to disable system restore for this.
This solution will break on 64 bit windows. To stymie rootkit authors it'll no longer be possible to replace/modify OS runtime files without convincing MS you can't do it any otehr way and getting them to digitally sign your files.
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if i remember well, if u add your program to program files/startup, it will start once with windows...
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Noooooo, it will start when the user logs in, not when Windows starts. There is a HUGE difference.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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yup, u'r right... my mistake... if u want, u can mess with the boot section and make it be a win service that starts when windows starts...
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hi!!!!!!!!
good day to all of you.....
as i'll make my project proposal in the internet connection, i have a problem in the timer in the MFC it has an error, coz i dont even know the code in the timer button.....
thanks ........i hope u will help me on this.........
regards
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You won't get much help with this. Your question doesn't make any sense what-so-ever.
Internet connection? Timer? MFC? Button?
How does any of this relate to each other and what is it you're trying to do? What's the error?
MFC is a Visual C++ thing, not compatible with C#, so I hope you're even in the correct forum!
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I have used the eventlogger to log the events in system's application log. what is the path for that file, is it possible to specify the path for application log. how could i do auto/manual archieve on the application log
please help..
Regards,
Srini
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I thing ... the path is specified in the registry
File=%SystemRoot%\system32\config\AppEvent.Evt
but i want to store log file in a specified path without touching registry (ie without registry class in c#)
but still iam struggling with how to archieve the application log (i.e copying the file to normal text file)??
Regards,
Srini
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For example.. lets say you wanted to back up the System event log..
C:\WINDOWS\system32\config\SysEvent.Evt
Good luck trying to read it though, the evt files are encoded
Then there is
C:\WINDOWS\system32\config\System.Log
But you probably wont be able to open because Windows will have a tight grip on it.
My suggestion is this...
Open up your server explorer in Visual Studio and find the log you want to use. Click and drag that log over to your form or component.
It will have an event that gets fired whenever something writes to it, and will send that message to that event. So you could start achiving that way, or you could just periodically read the logs.
-Jason
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Thanks jasonpb,
Yah ur correct it is provide some events like
eventLog1.EntryWritten
But unfortunately it doesn't help me to programatically archive the event log data . ie it doesn't have method like to store the event log data into some other file. i thing we have to look for some win32 API to that is it correct??
i.e i have a menu Log -> Archive Event log
if the user press the above menu i have to store the event log file content to some other text file..
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