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Hello all,
I posted a question recently on using a SDK from an ASP.NET application and got some answers that made me rethink how i should approach an application i need to build.
Basically I have an ASP.NET application that needs to interact with a piece of hardware when either a user wants to interact (they tell the hardware to do something e.g. turn on turn off) or periodically (we poll for information from the hardware). Unfortunately the SDK only allows one call at a time so I need to provide my own locking around the SDK to ensure firstly that two asp clients attempt to interact with the hardware at the same time and secondly that a user doesn’t try to interact whilst a periodic action is taking place.
After some research and some questions on various forums I have decided to create a windows service which will create static instance of the SDK and the call these methods from the ASP.NET application through IPC remoting channels. From what I have read I will need to create two DLL’s one to interact with the SDK and contain the business logic and a DLL which will be used for the remoting objects.
Am just wondering if this seems the most logical way to tackle this problem or if anyone can think of a different/more efficient way or can see any holes in my solution. Am completely lost by this now as i can't find any examples of doing this it all seems to be about using web services but because i want to keep the state of the SDK object i didnt think i could use these??!!
Thanks,
Adam
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Where is the hardware, on the server ? If it's not, I'm not sure how you'd make this work ?
Christian Graus
Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.
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The hardware is communicated to via TCP/IP.
If it helps the hardware is a door controller which manages locking and unlocking doors.
The information that i poll from it is about access transactions.
Why do you think this will not work?!
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b/c I expected you were connecting to something via USB or something, a lot of people get confused about what code runs on the server and what runs on the client, while they develop. If it's using TCP/IP, I guess that would work fine.
Christian Graus
Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.
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If you need to periodically poll the device for information (and then store it in a database) then a Windows Service is likely the best way to do that.
For allowing users to send commands to the device you could have a table of such commands/requests.
The client would insert a request (perhaps via a WebService), the Windows Service would then perform (or deny) them. This would form an audit trail of such events.
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I'm trying to check if a CD had been burnt using ISO 9660 level 1. I've looked at using win32_CDROMDrive but can't identify what whould tell me the format type. I thought maybe it would be in win32_diskPartition but I don't seem to be able to see any CD information using that (just my 2 partitions on the fixed disk).
Is there a reasonably simple way of identifying the filesystem on the disk?
Thanks
Arron
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Hello all,
i have install my applicatin on the client pc , he is using windows vista
there is some reports "Crystal built in FrameWrork 2.0" ,in some reports fields there is ? marks insted of the data.
these reports shows arabic language ,
But those feilds is defined in data bas as varchar(50)
should i redifen it as nvarchar(50) to hold arabic language?
note : i dont suffer from this problem m using windows xp!!!
Thx.
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If you use varchar, the charset in the database has to match the charset of the system, and that charset has to support the characters that you want to use. By a fluke you seem to have gotten all that right on your system.
If you use nvarchar, the data is unicode, and supports any characters.
Despite everything, the person most likely to be fooling you next is yourself.
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SO sick of good answers being downvoted. I 5d you
Christian Graus
Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.
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Hi,
I have a .NET Project written in C# which is communicating with a server. I got it all bundled in a zip file (including a msi and setup.exe) file which installs fine.
The users can download this setup from a web server. Now what I need to do is to customize the setup to include user specific information. The setup should set values in the registry depending on the data the user entered in the website. Hence I need some way to automatically include the user data (e.g. as xml file?) in the setup.
Does anyone has an idea how to do this?
Thank you,
Torsten
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Create one Visual Studio Deployment Projects and add your current solution to it. now you can add your own dialogus and code routines to customize the setup wizard.
this might help[^]
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Hi all,
Is it possible to have a text's fontstyle property to Bold, Italic and underline at the same time.
If yes then how?????
Thanks in advance
Rana Krishnraj
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The documentation says:
This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.
So yes it is possible.
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the Coding Way:
create a new Font(new FontFamily("Tahoma"), 12.75f); (for Example)
and change what ever u want in it
then assgin it to text's font property
The Designer View Way :
or Go To the component in the Design View and click on the Font Property
then Cahnge What ever u Like
Have Fun
Never forget it
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ya that's correct.
But if font have already Bold property set to true and now i want to set its italic property then resulted output text would have both Bold and italic property set to true, instead of only one that is either bold or italic.
any way thanks for replying...I got the hint. let me do it
Rana Krishnraj
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FontStyle fs = FontStyle.Bold;
fs |= FontStyle.Italic;
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In code you can combine them using bitwise operations:
FontStyle.Bold | FontStyle.Italic
modified 12-Sep-18 21:01pm.
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Hi!
Please, help me! I would like to create List<t>, for myType in runtime(for example, Int32):
Type myType = Type.GetType("System.Int32");<br />
List<myType> list = new List<myType>();<br />
- compiler is throwing errors:"The type or namespace name 'myType' could not be found (are you missing a using directive or an assembly reference?)"
How can I create such list for this type?
modified on Tuesday, July 8, 2008 9:42 AM
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You can't. The generic type has to be known at compile time.
What is it that you are trying to accomplish?
Despite everything, the person most likely to be fooling you next is yourself.
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Guffa wrote: You can't. The generic type has to be known at compile time.
Not quite. A generic type can still be created with reflection at runtime.
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You can create a generic type with reflection at run time. However, I am not sure what use it would be to you.
Eg: Activator.CreateInstance(typeof(List<> ).MakeGenericType(yourtype))
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Hi, I'm looking to create an executable file that I can load on my windows mobile Symbol device that'll delete everything that I don't need. The problem is that I'm not familiar at all with working with windows registry within code. This is my first time using c#, however I'm fluent in Java which I've heard is similar. Can someone give me a start on the code such as a method used to delete a registry key and a method used to delete a file.
Thanks in advance!
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Here u Go it's here in CodeProject 
[^]
Have Fun
Never forget it
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umm after looking here I need some help as I've never written in c# before. Is there a way I can just hardcode what I need. I just want something simple for now that I can type in what I need and it will delete it. When I look at
[code]
try
{
// Setting
RegistryKey rk = baseRegistryKey;
RegistryKey sk1 = rk.CreateSubKey(subKey);
// If the RegistrySubKey doesn't exists -> (true)
if (sk1 == null)
return true;
else
sk1.DeleteValue(KeyName);
return true;
}
[/code]
it seems that when I'm cteating the Registry key rk and deleting it, it's doing nothing more then deleting what I made, even though I didnt call new. Could someone help me out.
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