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Ahhh, Ok I understand now.
Thanks for the help! After I busted through like 100 other errors I had in my program I finally got it to work.
You're a lifesaver, have a good day!
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Hello All
I have two USB audio devices attached to the system. Using API's "SetupDiEnumDeviceInterfaces" and "SetupDiGetDeviceInterfaceDetail" I am able to figure out their unique device paths which is in this format
"\\?\hid#vid&pid&col02#7&1bca1430e&0&0001#{some id}"
"\\?\hid#vid&pid&col02#7&3db23aebe&0&0001#{some id}"
Also on using the API "waveInGetDevCaps" I am able to find out the unique strings the system is using to identify this device which are "USB Headset" and "USB Headset (2)", my question is how can i know from my application which "USB Headset" is linked to the which of the above mentioned path. Or is there a way to map the audio devices listed in “Sound and Audio Devices” settings with the actual hardware programmatically.
Any input is greatly appreciated.
OS (2000, XP, Vista), VS2005 ( VC++ IJW )
Thanks
gsm
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I have a nested managed class and I would like to expose the properties of the nested class to C# and VB. How do I do this?
In the following C++ managed class, I can see all of the properties of FitnessUserProfile in VB. I can see the Activity class within the FitnessUserProfile object in VB but I can't see any FitnessUserProfile.Activity properties.
What am I doing wrong?
I am using Visual Studio 2005.
namespace GarXface<br />
{<br />
<br />
<br />
public ref class FitnessUserProfile : public ICloneable<br />
{<br />
<br />
public:<br />
<br />
property unsigned BirthDay<br />
{<br />
void set(unsigned day)<br />
{<br />
m_pProfile->SetBirthDay(day);<br />
}<br />
<br />
unsigned get()<br />
{<br />
return m_pProfile->GetBirthDay();<br />
}<br />
}<br />
<br />
<br />
ref class Activity : public ICloneable {<br />
internal:<br />
<br />
Activity(void);<br />
<br />
public:<br />
<br />
property float MaxHeartRate<br />
{<br />
void set(float heartRate)<br />
{<br />
<br />
}<br />
<br />
float get()<br />
{<br />
<br />
}<br />
<br />
} <br />
<br />
<br />
<br />
<br />
<br />
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stempsoft wrote: ref class Activity
Make the nested class public. So it can be accessed by FitnessUserProfile::Activity . BTW, why are you exposing nested class?
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Thanks but I have it working now. Not sure what I was doing wrong before.
And why wouldn't I expose a nested class? Activity is only useful within FitnessUserProfile.
Oh and you advice was wrong it generates an error:
Help file says the following:
When applied to a managed type, such as class or struct, the public and private keywords indicate whether the class will be exposed through assembly metadata. public or private cannot be applied to a nested class, which will inherit the assembly access of the enclosing class.
When used with /clr, the ref and value keywords indicate that a class is managed (see Classes and Structs (Managed)).
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stempsoft wrote: Oh and you advice was wrong it generates an error:
Then you are doing it incorrectly. See the following code which will execute without any errors. It show how a method declared in nested class is accessed from outside.
public ref class Outer
{
public:
ref class Inner
{
public:
void SayHello()
{
Console::WriteLine("Hi from inner");
}
};
};You use it like
Outer::Inner^ inner = gcnew Outer::Inner();
inner->SayHello(); Does that help?
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i am developing a application which has got a admin module and a user module, admin module will be running on only one machine, but the user modules will be running on multiple systems. i have got some settings to be done in admin module and the same settings should be used by user module also, how to get the settings in the user module from the admin machine. whenever any settings are changed in admin module all the user modules should get the new settings.
Naveen
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naveen_bij wrote: which is the best method to send data to clients, without a request from client
If the clients are not going to make a request then they have to listen or poll for the data. It's not the best method, it's the only method left after you eliminate requesting data. Essentially there is little difference between the two.
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thanks for your response.
so i have to write a listener event in my application. Currently i don't know how to do it, but will try to do that and if any problems will get back for your help
Naveen
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Hi,
I wouldn't try and push the data from server to client; just have one of these:
- have the client ask whether new admin data is available at the start of a new session;
- or have the server respond with a specific error code rather than real data whenever it feels the
client should get new admin data first.
Luc Pattyn [Forum Guidelines] [My Articles]
- before you ask a question here, search CodeProject, then Google
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get
- use the code block button (PRE tags) to preserve formatting when showing multi-line code snippets
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thank you sir,
i thought of using UDP multicasting, where all the clients join a group and server sends a datagram to that group. so i will send a error code to the group stating that new settings are available, when the user modules receive this message they have to complete and stop all the other processes and get the new settings, because the settings are used in other processes.
can u please guide me how to do it in a better way
Naveen
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Hi,
there are some problems with multicast:
- the sender does not know how many listeners there are
- the sender does not expect a response
- the receivers have no way to respond, to inform things went well, or wrong...
- the receivers may have missed it (being off, or just not listening); if so, no one notices.
So if it is essential that your clients immediately switch over to the new settings, I don't think multicasts are an option. I suggest you close the existing connections (maybe by returning an error on all requests other than CONNECT) and tell the clients that try and
(re)connect that new settings are available.
An easy way to manage versions/settings/... is by adding one byte to every message sent by clients, I would call it the generation number. The server would then refuse all requests with a bad generation number except "give me valid settings", and return an error saying "bad generation"; the client would then close the connection, ask for the latest settings (which works outside a session, and no matter what the generation number is), then
start a new session. And of course every time the server has new settings it simply increments the generation number.
Luc Pattyn [Forum Guidelines] [My Articles]
- before you ask a question here, search CodeProject, then Google
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get
- use the code block button (PRE tags) to preserve formatting when showing multi-line code snippets
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why do you eliminate the requesting from client?
what about setting a listening thread on the client which gathering the update command from the admin module?
I am developing a application ,i use this way.
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i am eliminating the request from client because the settings changed on the server should be updated immediately to all the clients.
can you please guide me how to write a listening thread, it would be very helpful and how to send the update command to all the clients.
in my application clients are independently running they they take only the settings from server and nothing else. we thought of doing this because server downloads the new settings from another host and then will distribute the settings locally on LAN.
Naveen
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in client modual,I start a thread by createthread(),
in the thread fuction,i use blocked socket api,accept(). and make the thread always runing by while(1).
like below:
while(1)
{
....
accept(); //thread will be blocked here ,i think it's efficient,no more
// cpu time
....
}
in the admin modual, when you want to send changes,using the connect()and send().
do I make myself clear for you?
if not ,I sorry. because english is not my mother language.
if any question more ,we can discuss more.
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thank you for your precious time
it means all my user modules should be connected to admin module and wait in an infinite loop.
what method shall i use to connect to the admin module.
i think my list of questions is growing. since i have recently started working on .net, i dont know much about .net
Naveen
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.net i am not familiar. my project is vc++6.0. so i use blocked socket api.on my admin module,i start a thread for listening client(infinite loop),when client connected successfully,admin module start another thread to dealling with the data transfer.
hope my method can help you.
modified on Wednesday, February 25, 2009 7:51 PM
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thank you
i will try to work it out as u have said. will get back if any problems
Naveen
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I am new to C++/CLI.
Tried to reference a dll from VC++ project with Common Language Runtime Support (/clr).
I am getting the below error message when running application.
"An unhandled exception of type 'System.TypeInitializationException' occurred in Unknown Module."
What could be the problem?
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KASR1 wrote: I am new to C++/CLI.
What else are you new to, programming?
KASR1 wrote: "An unhandled exception of type 'System.TypeInitializationException' occurred in Unknown Module."
What could be the problem?
Yes indeed, what could be the problem, try clicking on this link[^]
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Are you making fun!
I have tried searching Google and most of them were not specific to my problem.
So we posted it here.
For getting quick solution only we are posting here. Not to make fun!
Kindly give us the solution if you know or dont post a reply like this!
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KASR1 wrote: Kindly give us the solution if you know
I did. If you are not capable of using the link I provided to solve your problem then you need to listen to this song[^]
KASR1 wrote: or dont post a reply like this!
I will post anything I want asswipe, go f*** yourself.
Oh, and have a nice day.
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Who gave MVP to You! Instead they should give you FVP!!
By seeing your reply they regret themselves.
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I am working on asp.net using c#
I am working on folderbrowserdialog I got an exception
<big>>"Current thread must be set to single thread apartment (STA) mode before OLE calls can be made. Ensure that your Main function has STAThreadAttribute marked on it. This exception is only raised if a debugger is attached to the process."</big>
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This is the "Managed C++/CLI" forum! Please post this question in the ASP.NET or C# forum.
"We make a living by what we get, we make a life by what we give." --Winston Churchill
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