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Is it more efficient to use the Win32 API with BitBlt for double buffering or simply the .NET way with SetStyle?
I've seen many web sites that offer different opinions on this. When I'm looking at the drawing performance, it seems that BitBlt is slightly faster (Even though I doubt it's using any hardware acceleration).
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If graphics performance is the issue then you need to develop a couple test programs in C# to determine if the performanace obtained is suitable. You can always eek out greater performance by dropping down the VC++ but you might want to reserve that as your last option
Mike
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how to get a window handle in .net application.
thanks
Ramendra K
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Of the myForm.Handle property...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Hi,
I am creating an application using Visual Studio .NET 2003 whose setup requires another setup to be embedded.
Is there any way by which I can embed an .msi file in my setup and launch it during the installation of my application.
I couldn't find anything on this anywhere...Please help
Sameer Bhise
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From page 175 of Phil Wilson's book "The Definitive Guide To Windows Installer":
You cannot start an external Windows Installer setup from within your own setup because Windows prevents two installs from being in the InstallExecuteSequence at the same time. If the other setup is installer-based, then for this reason you can't start it from within your setup package. Although you can detour this restriction by starting the other install from the UI sequence of your own setup, this in turn means tha tyou're committed to providing a UI from within your own install, which can therefore never be silent. This effectively makes your product nondeployable in software distribution schemes that almost always suppress the UI. So, you can add the MSI file to your install project and hook it to a UI event by using Orca to edit the MSI file, or you can add it as a custom action and make it an asynch action when the installer ends.
"we must lose precision to make significant statements about complex systems."
-deKorvin on uncertainty
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hello all,
Quite simply, I need to get the size of an objects memory footprint, does anybody know how this can be done in C#? e.g The amount of bytes of memory a DataSet object uses after it has been populated via a database call.
I have looked at the sizeof(..) MSDN docs, but these indicate that the function is only valid for Value types and is also unsafe code (something I would prefer to avoid). There is also the System.Runtime.InteropServices.Marshal.SizeOf(..) function which unfortunatly returns the following error for datasets:
Additional information: Type System.Data.DataSet can not be marshaled as an unmanaged structure; no meaningful size or offset can be computed.
At the moment I have a very clunky piece of code that parses the DataSet via an XML object into a Byte[] and then uses the length of the array. Not very pretty at all
Thanks
post.mode = postmodes.signature;
SELECT everything FROM everywhere WHERE something = something_else;
> 1 Row Returned
> 42
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The size of a DataSet object? I don't think you can, reliably anyway.
The error says it all - "no meaningful size or offset can be computed".
The DataSet is a complex object that not only holds value types, but also holds references to other objects, that won't be inside the footprint of the DataSet object. You'd have to get the size of every referenced object that a DataSet refers to, and add that to the size of the DataSet. But as you've already found out, you can't do that.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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What do you need to use it for? It is possible using the profiler api, but that involves COM, native code and turning profiling on for you app which will slow it down. If you just need to check something you can also just use windbg and sos to view the DataSet in memory.
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
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Well thats the thing, this isnt just development function I am after, the code would stay in the production release.
Essentially I have a traditional application logger that support different log levels, at log level DEBUG data in datasets is output to the log files. What I want to do is check the size of the dataset, if it exceeds ~20mb then only log when the application configuration allows (i.e. a LogLargeObjects configuration item)
post.mode = postmodes.signature;
SELECT everything FROM everywhere WHERE something = something_else;
> 1 Row Returned
> 42
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how can i change the background color of console window
not only of text area but of hole background when we run the app.
AMit Katiyar
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If your using .NET 2.0, all this has been made very easy for you. eg:
<br />
Console.BackgroundColor = ConsoleColor.Blue;<br />
Console.Clear();<br />
If not, then its down the old InterOp path I'm afraid.
Regards,
Rob Philpott.
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Hello there,
I'm having a problem using XMLConvert.ToDateTime(str) when str = "2005-07-13T11:12:00Z". But it works when the last character 'Z' is removed from the string. What could be a work around for this? I know we can't just remove 'Z' since it denotes that the time is in GMT and not in local time.
Thanks!
~Rafferty
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Hey,
Off the top of my head (better solution probably exists) - why don't you replace the Z of present with ' +00:00' and try that?
Regards,
Rob Philpott.
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That won't work, Z represents the time to be in GMT time. so if I add +00:00, the xmlconvert class may think that the time is in local time which will give me wrong time values
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Not so,
You can either express a date using the Z to denote UTC time (same as GMT), or you can use local time and specify the timezone. By using " +00:00" you are using the local time in Greenwich which also happens to be GMT.
Take a look at http://www.w3.org/TR/NOTE-datetime[^]
Regards,
Rob Philpott.
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Hi,
I had to create Windows Service Application for my project. I have a client-server application. The server application, is a form with a button, and on click of it the server starts. So i need to convert this application to 'windows service'. I went through MSDN, and created a service. In the 'OnStart' method, u need to write the code which will run the application, so i wrote the 'code which was in the buttonClick event' of the form...
the service was created and installed, but when i 'started the service', i got this errror :
"The Service1 service on your Lcal Cmputer started and then stopped. Some services stop automaically, if they have no work to do, for example, the Performance Logs and Alert services."
Please do tell me what to do.....
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1. You need to construct a loop in thread somewhere, else the program will just quit.
2. Im not 100% sure, but you are trying to use UI code in a service. .NET services dont interact with the desktop.
xacc.ide-0.1 released! Download and screenshots
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Hi everyone,
I need some help and would appreciate any constructive ideas. I've never done anything like this before and I don't know where to begin. I have a program running on my computer that reads my current IP address from a config file. Unfortunately, the program only reads the config file at startup - it never checks it again. The problem is that my IP address changes, and the program is completely unaware of it. (and I'm not always available to restart the service) I've been back and forth with the author, throwing ideas at him. (he hasn't released the source and doesn't plan on updating the program) His last email was revealing though, he mentioned that the IP address is checked (where it's stored in memory) at intervals of 1 minute. He also suggested that I could write a program to replace the IP address in memory with the current address.
I don't even know where to begin. I haven't received more information then that. Hopefully the author will help, but I can't exactly rely on that and wanted to get started with something.
My experience is probably beginner level C#. I've written several windows forms, some pocket pc applications, and some asp.net stuff. I'm working on my first directx game.
here's what I believe I need to do:
- find running programs and identify the one i need
- dump everything that the program has in memory
- search for the area that matches my old ip address
- write a program that compares ip addresses and if needed, replaces the old address with the new one.
- wrap this into a service (be fine if this was a windows form for now - there's a couple of excellent articles on writing the service)
Where do I start? I've learned most of my C# from example so I'm missing the formal background that many people have. Can someone recommend an article/example (C# preferred) that is even remotely related. That would really help!
Thanks so much!
Emi ^_^
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Yikes. Good luck.
I think this is going to be a non-starter. Programs run in processes, and processes are isolated from each other in a protected Operating System such as Windows to prevent exactly the thing you are trying to do.
As for the program, why would it load the IP address once at start up and then check its in memory copy once a minute - most strange.
Also out of curiosity, why does your IP address change?
Regards,
Rob Philpott.
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Yeah, I had a feeling this was going to be interesting, but I really don't have any alternative if the author refuses to help.
The program is a server that when started retrieves the IP address you've configured in a settings file. (this is the last known ip address) It then updates a master server with sed ip address so that clients can connect to it. The server was originally meant to run as a windows form and has a textbox for entry of the ip address. Once that field changes - the master server *should* be updated. (or perhaps the server needs to be restarted - not sure of the details)
Anway, I have this program running as a service so there isn't a UI to interact with. This solution has worked great - until we moved recently and changed ISPs. This one is horrible - my IP changes sporatically somtimes twice a day, sometimes a couple of days. The problem I'm trying to solve is that the server is still running and listed in the master server. Of course, the IP has changed and anyone trying to connect can't. There's no notification to the clients why this failed either.
Whew. complicated huh? I don't have any alternative as I want to continue to run the server here. I also can't afford a static IP 
So, I figured I'd try to tackle this one small problem at a time.
First question: How can I get a list of all programs currently running. I know the exe name - is that enough to identify the process?
Thanks!
Emi ^_^
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Hmm. What an utterly grim situation you are in.
I can guarantee you won't be able to access a seperate process' memory. Each process has its own address space which is mapped into a different area of physical memory. This is done so that a rogue pointer in one process couldn't harm the memory of another process - if you go out your own process space an exception is thrown.
Perhaps one solution could be to programmatically stop the service and restart it when the IP changes - something to think about.
I would certianly consider changing ISPs as well - that's plain madness having an IP address change so frequently - presumably some bizarre DHCP lease time.
The only other thing which springs to mind is if you could replace the IP address with a hostname then use a dynamic dns service to make sure that you have a domain name which always points to your server. Have a look at http://www.dyndns.com/[^] if you're unfamiliar with this.
Best of luck!
Regards,
Rob Philpott.
-- modified at 12:08 Thursday 1st December, 2005
One other thought - get a packet sniffer and establish the form of the message sent by the server. Perhaps you could write a service to replicate this and take that part of functionality away from the server.
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This may seem silly, but instead of trying to jump through these hoops (good luck solving this problem!!  )
... why not just call the ISP and see if they can arrange a permanent IP for you? If not, I'd seriously begin looking for a more stable ISP.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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