but the problem is i need to extract the template from the fingerprint each time i need to identify someone
and that takes 45 second depend on the database for me this to slow
my problem is with passing the database values
This shows that you don't know what WiFi really is. It's a wireless Ethernet interface. It's a carrier or transmitter and receiver of other transport protocols, not an implementation of one. You cannot transmit a file using WiFi.
You have to use an application protocol, like FTP, HTTP, or even a protocol of your own design, transported via another protocol, like TCP/IP, to communicate with another device or computer. Look at what TCP/IP stands for: Transmission Control Protocol/Internet Protocol. It's a transport protocol, not an application protocol.
yes...it will...though I have been doing some research and I think a DB25 serial connector will be easier to work with if I use an IC with Darlington pair arrays to interface the PC port and the LEDs.
I now need references.
any help will be highly appreciated.
For how to send commands though a serial inteface I only can refer to one of my article[^]s becausee I have not much expeience with hardware programming. Maybe the manual of the DB25 connector gives you some information.
If you want other opinions you may should ask about experiences with the DB25 connector and the IC you want to use in the Hardware & Device forum[^].
Considering todays machines are not even coming with serial and parallel ports, you're entire premise of using them is already dead in the water and limited in scope to the lifttime of the hardware that you are currently using.
Since you already know a bit of eletronics, just go with a microcontroller that can run the .NET Micro Framework and be done with it!
Oh! and those can already be programmed over USB using Visual Studio 2008 and up, if not VS2010 and up.
By writing appropriate code for what you want to do.
What did you think the answer was going to be with a question like that??
In all seriousness, if you want to use C#, get a Netduino[^] or a FEZ Panda[^] microcontroller and learn how it's really done, without risking your computers expensive hardware. You'll also learn alot about digital electronics if you really want to teach yourself. Try getting this book[^] or this one[^].
it depends on what you need , if you have a Com ports you can use it easily with some hardware buffer and amplifier , or you can use any controllers, if you are not familiar with Arduino or PI , try to find a CanaKit board, its very easy and with LED's and Relayed output.
optoisolator for each of the used lines(ie Protect the PC interface
next a latch (something to hold the data)
drivers (for lighting the lighty things)
r r r r r r r
e e e e e e e
s s s s s s s
i i i i i i i
db25 s s s s s s s
╔═╗latch sig t t t t t t t
-║-║------| o o o o o o o
║ ║ | r r r r r r r
║ ║ ╔═╗ ╔═╗ ╔═╗ | | | | | | | //led
-║-║-║ ║-║ ║----║r║-----o-------------------|>-----o
-║-║-║ ║-║ ║----║s║--o----------------------|>-----o
╚═╝ ╚═╝ ╚═╝ ╚═╝
each of the lines are attached to a pull up resistor
Does .net not call the method?
I use the GC.CollectionCount method to get the number of times garbage collection has occurred for the 0/1/2 generation of objects and find they were 211/196/9.
It means .net Does do it.
Can somone tell me why it is occured?
PS: I have a test by open and closing 10+ screens, my app consumed 200+MB from task manager. According to the .net memory profiler and ANTS memory profiler, the objects created by my screens have been actually collected.
I also tested that if we forced a GC(Garbage Collector) collect by above codes, the memory will be reduced obviously.
For the most part .net GC "just works" in .net, obviously this doesn't happen in all cases. It is rare to need to do an explicit GC. This[^] is probably worth a read. The most relevant part to this question is when GC takes place, to quote:
The system has low physical memory.
The memory that is used by allocated objects on the managed heap surpasses an acceptable threshold. This means that a threshold of acceptable memory usage has been exceeded on the managed heap. This threshold is continuously adjusted as the process runs.
The GC.Collect method is called. In almost all cases, you do not have to call this method, because the garbage collector runs continuously. This method is primarily used for unique situations and testing.
When one of these happens, GC takes place.
If you do something that takes up a lot of memory then it can be a good idea to GC, but it is generally discouraged. This is really a tuning thing and depends on your app, if the performance is degraded then you probably do need it.
Without seeing your code base, no. I'm going to take a wild guess here that you have strong event handlers that aren't being released, or you possibly have an issue with data bindings not being cleared from items such as the DataGrid. Attach a profiler, run the application and investigate the issues. What you currently have here is masking the real problem.
I was brought up to respect my elders. I don't respect many people nowadays.